South Carolina Polling Places

.block

license: MIT
border: no
height: 960

README.md

a quick scatterplot-map of all of the polling places in South Carolina for the general election on November 8th, 2016

data from https://github.com/micahstubbs/VIP-feed-information-project

inspired by Nadieh Bremer's Scatterplot with Voronoi - ported to d3.v4, and no SVG overlay from @recifs

this example uses the d3-voronoi-scatterplot chart component

read more about the history of polling places for US elections at 2016 The Great Poll Closure report [pdf]

the 2012 Election Administration and Voting Survey [pdf] a good read on the topic

and for completeness, here is the what-if... tweet that sparked this civic mapping project

d3-voronoi-scatterplot.js

// https://github.com/micahstubbs/d3-voronoi-scatterplot Version 0.1.0. Copyright 2016 Contributors.
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('lodash')) :
	typeof define === 'function' && define.amd ? define(['exports', 'lodash'], factory) :
	(factory((global.d3VoronoiScatterplot = global.d3VoronoiScatterplot || {}),global._));
}(this, function (exports,_) { 'use strict';

	_ = 'default' in _ ? _['default'] : _;

	var version = "4.2.7";

	function ascending (a, b) {
	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
	}

	function bisector (compare) {
	  if (compare.length === 1) compare = ascendingComparator(compare);
	  return {
	    left: function (a, x, lo, hi) {
	      if (lo == null) lo = 0;
	      if (hi == null) hi = a.length;
	      while (lo < hi) {
	        var mid = lo + hi >>> 1;
	        if (compare(a[mid], x) < 0) lo = mid + 1;else hi = mid;
	      }
	      return lo;
	    },
	    right: function (a, x, lo, hi) {
	      if (lo == null) lo = 0;
	      if (hi == null) hi = a.length;
	      while (lo < hi) {
	        var mid = lo + hi >>> 1;
	        if (compare(a[mid], x) > 0) hi = mid;else lo = mid + 1;
	      }
	      return lo;
	    }
	  };
	}

	function ascendingComparator(f) {
	  return function (d, x) {
	    return ascending(f(d), x);
	  };
	}

	var ascendingBisect = bisector(ascending);
	var bisectRight = ascendingBisect.right;
	var bisectLeft = ascendingBisect.left;

	function descending (a, b) {
	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
	}

	function number (x) {
	  return x === null ? NaN : +x;
	}

	function variance (array, f) {
	  var n = array.length,
	      m = 0,
	      a,
	      d,
	      s = 0,
	      i = -1,
	      j = 0;

	  if (f == null) {
	    while (++i < n) {
	      if (!isNaN(a = number(array[i]))) {
	        d = a - m;
	        m += d / ++j;
	        s += d * (a - m);
	      }
	    }
	  } else {
	    while (++i < n) {
	      if (!isNaN(a = number(f(array[i], i, array)))) {
	        d = a - m;
	        m += d / ++j;
	        s += d * (a - m);
	      }
	    }
	  }

	  if (j > 1) return s / (j - 1);
	}

	function deviation (array, f) {
	  var v = variance(array, f);
	  return v ? Math.sqrt(v) : v;
	}

	function extent (array, f) {
	  var i = -1,
	      n = array.length,
	      a,
	      b,
	      c;

	  if (f == null) {
	    while (++i < n) if ((b = array[i]) != null && b >= b) {
	      a = c = b;break;
	    }
	    while (++i < n) if ((b = array[i]) != null) {
	      if (a > b) a = b;
	      if (c < b) c = b;
	    }
	  } else {
	    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) {
	      a = c = b;break;
	    }
	    while (++i < n) if ((b = f(array[i], i, array)) != null) {
	      if (a > b) a = b;
	      if (c < b) c = b;
	    }
	  }

	  return [a, c];
	}

	var array = Array.prototype;

	var slice = array.slice;
	var map = array.map;

	function constant (x) {
	  return function () {
	    return x;
	  };
	}

	function identity (x) {
	  return x;
	}

	function range (start, stop, step) {
	  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;

	  var i = -1,
	      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
	      range = new Array(n);

	  while (++i < n) {
	    range[i] = start + i * step;
	  }

	  return range;
	}

	var e10 = Math.sqrt(50);
	var e5 = Math.sqrt(10);
	var e2 = Math.sqrt(2);
	function ticks (start, stop, count) {
	  var step = tickStep(start, stop, count);
	  return range(Math.ceil(start / step) * step, Math.floor(stop / step) * step + step / 2, // inclusive
	  step);
	}

	function tickStep(start, stop, count) {
	  var step0 = Math.abs(stop - start) / Math.max(0, count),
	      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
	      error = step0 / step1;
	  if (error >= e10) step1 *= 10;else if (error >= e5) step1 *= 5;else if (error >= e2) step1 *= 2;
	  return stop < start ? -step1 : step1;
	}

	function sturges (values) {
	  return Math.ceil(Math.log(values.length) / Math.LN2) + 1;
	}

	function histogram () {
	  var value = identity,
	      domain = extent,
	      threshold = sturges;

	  function histogram(data) {
	    var i,
	        n = data.length,
	        x,
	        values = new Array(n);

	    for (i = 0; i < n; ++i) {
	      values[i] = value(data[i], i, data);
	    }

	    var xz = domain(values),
	        x0 = xz[0],
	        x1 = xz[1],
	        tz = threshold(values, x0, x1);

	    // Convert number of thresholds into uniform thresholds.
	    if (!Array.isArray(tz)) tz = ticks(x0, x1, tz);

	    // Remove any thresholds outside the domain.
	    var m = tz.length;
	    while (tz[0] <= x0) tz.shift(), --m;
	    while (tz[m - 1] >= x1) tz.pop(), --m;

	    var bins = new Array(m + 1),
	        bin;

	    // Initialize bins.
	    for (i = 0; i <= m; ++i) {
	      bin = bins[i] = [];
	      bin.x0 = i > 0 ? tz[i - 1] : x0;
	      bin.x1 = i < m ? tz[i] : x1;
	    }

	    // Assign data to bins by value, ignoring any outside the domain.
	    for (i = 0; i < n; ++i) {
	      x = values[i];
	      if (x0 <= x && x <= x1) {
	        bins[bisectRight(tz, x, 0, m)].push(data[i]);
	      }
	    }

	    return bins;
	  }

	  histogram.value = function (_) {
	    return arguments.length ? (value = typeof _ === "function" ? _ : constant(_), histogram) : value;
	  };

	  histogram.domain = function (_) {
	    return arguments.length ? (domain = typeof _ === "function" ? _ : constant([_[0], _[1]]), histogram) : domain;
	  };

	  histogram.thresholds = function (_) {
	    return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;
	  };

	  return histogram;
	}

	function threshold (array, p, f) {
	  if (f == null) f = number;
	  if (!(n = array.length)) return;
	  if ((p = +p) <= 0 || n < 2) return +f(array[0], 0, array);
	  if (p >= 1) return +f(array[n - 1], n - 1, array);
	  var n,
	      h = (n - 1) * p,
	      i = Math.floor(h),
	      a = +f(array[i], i, array),
	      b = +f(array[i + 1], i + 1, array);
	  return a + (b - a) * (h - i);
	}

	function thresholdFreedmanDiaconis (values, min, max) {
	  values = map.call(values, number).sort(ascending);
	  return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));
	}

	function thresholdScott (values, min, max) {
	  return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));
	}

	function max (array, f) {
	  var i = -1,
	      n = array.length,
	      a,
	      b;

	  if (f == null) {
	    while (++i < n) if ((b = array[i]) != null && b >= b) {
	      a = b;break;
	    }
	    while (++i < n) if ((b = array[i]) != null && b > a) a = b;
	  } else {
	    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) {
	      a = b;break;
	    }
	    while (++i < n) if ((b = f(array[i], i, array)) != null && b > a) a = b;
	  }

	  return a;
	}

	function mean (array, f) {
	  var s = 0,
	      n = array.length,
	      a,
	      i = -1,
	      j = n;

	  if (f == null) {
	    while (++i < n) if (!isNaN(a = number(array[i]))) s += a;else --j;
	  } else {
	    while (++i < n) if (!isNaN(a = number(f(array[i], i, array)))) s += a;else --j;
	  }

	  if (j) return s / j;
	}

	function median (array, f) {
	  var numbers = [],
	      n = array.length,
	      a,
	      i = -1;

	  if (f == null) {
	    while (++i < n) if (!isNaN(a = number(array[i]))) numbers.push(a);
	  } else {
	    while (++i < n) if (!isNaN(a = number(f(array[i], i, array)))) numbers.push(a);
	  }

	  return threshold(numbers.sort(ascending), 0.5);
	}

	function merge (arrays) {
	  var n = arrays.length,
	      m,
	      i = -1,
	      j = 0,
	      merged,
	      array;

	  while (++i < n) j += arrays[i].length;
	  merged = new Array(j);

	  while (--n >= 0) {
	    array = arrays[n];
	    m = array.length;
	    while (--m >= 0) {
	      merged[--j] = array[m];
	    }
	  }

	  return merged;
	}

	function min (array, f) {
	  var i = -1,
	      n = array.length,
	      a,
	      b;

	  if (f == null) {
	    while (++i < n) if ((b = array[i]) != null && b >= b) {
	      a = b;break;
	    }
	    while (++i < n) if ((b = array[i]) != null && a > b) a = b;
	  } else {
	    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) {
	      a = b;break;
	    }
	    while (++i < n) if ((b = f(array[i], i, array)) != null && a > b) a = b;
	  }

	  return a;
	}

	function pairs (array) {
	  var i = 0,
	      n = array.length - 1,
	      p = array[0],
	      pairs = new Array(n < 0 ? 0 : n);
	  while (i < n) pairs[i] = [p, p = array[++i]];
	  return pairs;
	}

	function permute (array, indexes) {
	  var i = indexes.length,
	      permutes = new Array(i);
	  while (i--) permutes[i] = array[indexes[i]];
	  return permutes;
	}

	function scan (array, compare) {
	    if (!(n = array.length)) return;
	    var i = 0,
	        n,
	        j = 0,
	        xi,
	        xj = array[j];

	    if (!compare) compare = ascending;

	    while (++i < n) if (compare(xi = array[i], xj) < 0 || compare(xj, xj) !== 0) xj = xi, j = i;

	    if (compare(xj, xj) === 0) return j;
	}

	function shuffle (array, i0, i1) {
	  var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),
	      t,
	      i;

	  while (m) {
	    i = Math.random() * m-- | 0;
	    t = array[m + i0];
	    array[m + i0] = array[i + i0];
	    array[i + i0] = t;
	  }

	  return array;
	}

	function sum (array, f) {
	  var s = 0,
	      n = array.length,
	      a,
	      i = -1;

	  if (f == null) {
	    while (++i < n) if (a = +array[i]) s += a; // Note: zero and null are equivalent.
	  } else {
	    while (++i < n) if (a = +f(array[i], i, array)) s += a;
	  }

	  return s;
	}

	function transpose (matrix) {
	  if (!(n = matrix.length)) return [];
	  for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {
	    for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
	      row[j] = matrix[j][i];
	    }
	  }
	  return transpose;
	}

	function length(d) {
	  return d.length;
	}

	function zip () {
	  return transpose(arguments);
	}

	var prefix = "$";

	function Map() {}

	Map.prototype = map$1.prototype = {
	  constructor: Map,
	  has: function (key) {
	    return prefix + key in this;
	  },
	  get: function (key) {
	    return this[prefix + key];
	  },
	  set: function (key, value) {
	    this[prefix + key] = value;
	    return this;
	  },
	  remove: function (key) {
	    var property = prefix + key;
	    return property in this && delete this[property];
	  },
	  clear: function () {
	    for (var property in this) if (property[0] === prefix) delete this[property];
	  },
	  keys: function () {
	    var keys = [];
	    for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
	    return keys;
	  },
	  values: function () {
	    var values = [];
	    for (var property in this) if (property[0] === prefix) values.push(this[property]);
	    return values;
	  },
	  entries: function () {
	    var entries = [];
	    for (var property in this) if (property[0] === prefix) entries.push({ key: property.slice(1), value: this[property] });
	    return entries;
	  },
	  size: function () {
	    var size = 0;
	    for (var property in this) if (property[0] === prefix) ++size;
	    return size;
	  },
	  empty: function () {
	    for (var property in this) if (property[0] === prefix) return false;
	    return true;
	  },
	  each: function (f) {
	    for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
	  }
	};

	function map$1(object, f) {
	  var map = new Map();

	  // Copy constructor.
	  if (object instanceof Map) object.each(function (value, key) {
	    map.set(key, value);
	  });

	  // Index array by numeric index or specified key function.
	  else if (Array.isArray(object)) {
	      var i = -1,
	          n = object.length,
	          o;

	      if (f == null) while (++i < n) map.set(i, object[i]);else while (++i < n) map.set(f(o = object[i], i, object), o);
	    }

	    // Convert object to map.
	    else if (object) for (var key in object) map.set(key, object[key]);

	  return map;
	}

	function nest () {
	  var keys = [],
	      sortKeys = [],
	      sortValues,
	      rollup,
	      nest;

	  function apply(array, depth, createResult, setResult) {
	    if (depth >= keys.length) return rollup != null ? rollup(array) : sortValues != null ? array.sort(sortValues) : array;

	    var i = -1,
	        n = array.length,
	        key = keys[depth++],
	        keyValue,
	        value,
	        valuesByKey = map$1(),
	        values,
	        result = createResult();

	    while (++i < n) {
	      if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
	        values.push(value);
	      } else {
	        valuesByKey.set(keyValue, [value]);
	      }
	    }

	    valuesByKey.each(function (values, key) {
	      setResult(result, key, apply(values, depth, createResult, setResult));
	    });

	    return result;
	  }

	  function entries(map, depth) {
	    if (++depth > keys.length) return map;
	    var array,
	        sortKey = sortKeys[depth - 1];
	    if (rollup != null && depth >= keys.length) array = map.entries();else array = [], map.each(function (v, k) {
	      array.push({ key: k, values: entries(v, depth) });
	    });
	    return sortKey != null ? array.sort(function (a, b) {
	      return sortKey(a.key, b.key);
	    }) : array;
	  }

	  return nest = {
	    object: function (array) {
	      return apply(array, 0, createObject, setObject);
	    },
	    map: function (array) {
	      return apply(array, 0, createMap, setMap);
	    },
	    entries: function (array) {
	      return entries(apply(array, 0, createMap, setMap), 0);
	    },
	    key: function (d) {
	      keys.push(d);return nest;
	    },
	    sortKeys: function (order) {
	      sortKeys[keys.length - 1] = order;return nest;
	    },
	    sortValues: function (order) {
	      sortValues = order;return nest;
	    },
	    rollup: function (f) {
	      rollup = f;return nest;
	    }
	  };
	}

	function createObject() {
	  return {};
	}

	function setObject(object, key, value) {
	  object[key] = value;
	}

	function createMap() {
	  return map$1();
	}

	function setMap(map, key, value) {
	  map.set(key, value);
	}

	function Set() {}

	var proto = map$1.prototype;

	Set.prototype = set.prototype = {
	  constructor: Set,
	  has: proto.has,
	  add: function (value) {
	    value += "";
	    this[prefix + value] = value;
	    return this;
	  },
	  remove: proto.remove,
	  clear: proto.clear,
	  values: proto.keys,
	  size: proto.size,
	  empty: proto.empty,
	  each: proto.each
	};

	function set(object, f) {
	  var set = new Set();

	  // Copy constructor.
	  if (object instanceof Set) object.each(function (value) {
	    set.add(value);
	  });

	  // Otherwise, assume it’s an array.
	  else if (object) {
	      var i = -1,
	          n = object.length;
	      if (f == null) while (++i < n) set.add(object[i]);else while (++i < n) set.add(f(object[i], i, object));
	    }

	  return set;
	}

	function keys (map) {
	  var keys = [];
	  for (var key in map) keys.push(key);
	  return keys;
	}

	function values (map) {
	  var values = [];
	  for (var key in map) values.push(map[key]);
	  return values;
	}

	function entries (map) {
	  var entries = [];
	  for (var key in map) entries.push({ key: key, value: map[key] });
	  return entries;
	}

	function randomUniform (min, max) {
	  min = min == null ? 0 : +min;
	  max = max == null ? 1 : +max;
	  if (arguments.length === 1) max = min, min = 0;else max -= min;
	  return function () {
	    return Math.random() * max + min;
	  };
	}

	function normal (mu, sigma) {
	  var x, r;
	  mu = mu == null ? 0 : +mu;
	  sigma = sigma == null ? 1 : +sigma;
	  return function () {
	    var y;

	    // If available, use the second previously-generated uniform random.
	    if (x != null) y = x, x = null;

	    // Otherwise, generate a new x and y.
	    else do {
	        x = Math.random() * 2 - 1;
	        y = Math.random() * 2 - 1;
	        r = x * x + y * y;
	      } while (!r || r > 1);

	    return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);
	  };
	}

	function randomLogNormal () {
	  var randomNormal = normal.apply(this, arguments);
	  return function () {
	    return Math.exp(randomNormal());
	  };
	}

	function irwinHall (n) {
	  return function () {
	    for (var sum = 0, i = 0; i < n; ++i) sum += Math.random();
	    return sum;
	  };
	}

	function randomBates (n) {
	  var randomIrwinHall = irwinHall(n);
	  return function () {
	    return randomIrwinHall() / n;
	  };
	}

	function randomExponential (lambda) {
	  return function () {
	    return -Math.log(1 - Math.random()) / lambda;
	  };
	}

	function linear(t) {
	  return +t;
	}

	function quadIn(t) {
	  return t * t;
	}

	function quadOut(t) {
	  return t * (2 - t);
	}

	function quadInOut(t) {
	  return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;
	}

	function cubicIn(t) {
	  return t * t * t;
	}

	function cubicOut(t) {
	  return --t * t * t + 1;
	}

	function easeCubicInOut(t) {
	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
	}

	var exponent = 3;

	var polyIn = function custom(e) {
	  e = +e;

	  function polyIn(t) {
	    return Math.pow(t, e);
	  }

	  polyIn.exponent = custom;

	  return polyIn;
	}(exponent);

	var polyOut = function custom(e) {
	  e = +e;

	  function polyOut(t) {
	    return 1 - Math.pow(1 - t, e);
	  }

	  polyOut.exponent = custom;

	  return polyOut;
	}(exponent);

	var polyInOut = function custom(e) {
	  e = +e;

	  function polyInOut(t) {
	    return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
	  }

	  polyInOut.exponent = custom;

	  return polyInOut;
	}(exponent);

	var pi = Math.PI;
	var halfPi = pi / 2;
	function sinIn(t) {
	  return 1 - Math.cos(t * halfPi);
	}

	function sinOut(t) {
	  return Math.sin(t * halfPi);
	}

	function sinInOut(t) {
	  return (1 - Math.cos(pi * t)) / 2;
	}

	function expIn(t) {
	  return Math.pow(2, 10 * t - 10);
	}

	function expOut(t) {
	  return 1 - Math.pow(2, -10 * t);
	}

	function expInOut(t) {
	  return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;
	}

	function circleIn(t) {
	  return 1 - Math.sqrt(1 - t * t);
	}

	function circleOut(t) {
	  return Math.sqrt(1 - --t * t);
	}

	function circleInOut(t) {
	  return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
	}

	var b1 = 4 / 11;
	var b2 = 6 / 11;
	var b3 = 8 / 11;
	var b4 = 3 / 4;
	var b5 = 9 / 11;
	var b6 = 10 / 11;
	var b7 = 15 / 16;
	var b8 = 21 / 22;
	var b9 = 63 / 64;
	var b0 = 1 / b1 / b1;
	function bounceIn(t) {
	  return 1 - bounceOut(1 - t);
	}

	function bounceOut(t) {
	  return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;
	}

	function bounceInOut(t) {
	  return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;
	}

	var overshoot = 1.70158;

	var backIn = function custom(s) {
	  s = +s;

	  function backIn(t) {
	    return t * t * ((s + 1) * t - s);
	  }

	  backIn.overshoot = custom;

	  return backIn;
	}(overshoot);

	var backOut = function custom(s) {
	  s = +s;

	  function backOut(t) {
	    return --t * t * ((s + 1) * t + s) + 1;
	  }

	  backOut.overshoot = custom;

	  return backOut;
	}(overshoot);

	var backInOut = function custom(s) {
	  s = +s;

	  function backInOut(t) {
	    return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
	  }

	  backInOut.overshoot = custom;

	  return backInOut;
	}(overshoot);

	var tau = 2 * Math.PI;
	var amplitude = 1;
	var period = 0.3;
	var elasticIn = function custom(a, p) {
	  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

	  function elasticIn(t) {
	    return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);
	  }

	  elasticIn.amplitude = function (a) {
	    return custom(a, p * tau);
	  };
	  elasticIn.period = function (p) {
	    return custom(a, p);
	  };

	  return elasticIn;
	}(amplitude, period);

	var elasticOut = function custom(a, p) {
	  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

	  function elasticOut(t) {
	    return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);
	  }

	  elasticOut.amplitude = function (a) {
	    return custom(a, p * tau);
	  };
	  elasticOut.period = function (p) {
	    return custom(a, p);
	  };

	  return elasticOut;
	}(amplitude, period);

	var elasticInOut = function custom(a, p) {
	  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

	  function elasticInOut(t) {
	    return ((t = t * 2 - 1) < 0 ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p) : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;
	  }

	  elasticInOut.amplitude = function (a) {
	    return custom(a, p * tau);
	  };
	  elasticInOut.period = function (p) {
	    return custom(a, p);
	  };

	  return elasticInOut;
	}(amplitude, period);

	function polygonArea (polygon) {
	  var i = -1,
	      n = polygon.length,
	      a,
	      b = polygon[n - 1],
	      area = 0;

	  while (++i < n) {
	    a = b;
	    b = polygon[i];
	    area += a[1] * b[0] - a[0] * b[1];
	  }

	  return area / 2;
	}

	function polygonCentroid (polygon) {
	  var i = -1,
	      n = polygon.length,
	      x = 0,
	      y = 0,
	      a,
	      b = polygon[n - 1],
	      c,
	      k = 0;

	  while (++i < n) {
	    a = b;
	    b = polygon[i];
	    k += c = a[0] * b[1] - b[0] * a[1];
	    x += (a[0] + b[0]) * c;
	    y += (a[1] + b[1]) * c;
	  }

	  return k *= 3, [x / k, y / k];
	}

	// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
	// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
	// right, +y is up). Returns a positive value if ABC is counter-clockwise,
	// negative if clockwise, and zero if the points are collinear.
	function cross (a, b, c) {
	  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
	}

	function lexicographicOrder(a, b) {
	    return a[0] - b[0] || a[1] - b[1];
	}

	// Computes the upper convex hull per the monotone chain algorithm.
	// Assumes points.length >= 3, is sorted by x, unique in y.
	// Returns an array of indices into points in left-to-right order.
	function computeUpperHullIndexes(points) {
	    var n = points.length,
	        indexes = [0, 1],
	        size = 2;

	    for (var i = 2; i < n; ++i) {
	        while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;
	        indexes[size++] = i;
	    }

	    return indexes.slice(0, size); // remove popped points
	}

	function polygonHull (points) {
	    if ((n = points.length) < 3) return null;

	    var i,
	        n,
	        sortedPoints = new Array(n),
	        flippedPoints = new Array(n);

	    for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];
	    sortedPoints.sort(lexicographicOrder);
	    for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];

	    var upperIndexes = computeUpperHullIndexes(sortedPoints),
	        lowerIndexes = computeUpperHullIndexes(flippedPoints);

	    // Construct the hull polygon, removing possible duplicate endpoints.
	    var skipLeft = lowerIndexes[0] === upperIndexes[0],
	        skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
	        hull = [];

	    // Add upper hull in right-to-l order.
	    // Then add lower hull in left-to-right order.
	    for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);
	    for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);

	    return hull;
	}

	function polygonContains (polygon, point) {
	  var n = polygon.length,
	      p = polygon[n - 1],
	      x = point[0],
	      y = point[1],
	      x0 = p[0],
	      y0 = p[1],
	      x1,
	      y1,
	      inside = false;

	  for (var i = 0; i < n; ++i) {
	    p = polygon[i], x1 = p[0], y1 = p[1];
	    if (y1 > y !== y0 > y && x < (x0 - x1) * (y - y1) / (y0 - y1) + x1) inside = !inside;
	    x0 = x1, y0 = y1;
	  }

	  return inside;
	}

	function polygonLength (polygon) {
	  var i = -1,
	      n = polygon.length,
	      b = polygon[n - 1],
	      xa,
	      ya,
	      xb = b[0],
	      yb = b[1],
	      perimeter = 0;

	  while (++i < n) {
	    xa = xb;
	    ya = yb;
	    b = polygon[i];
	    xb = b[0];
	    yb = b[1];
	    xa -= xb;
	    ya -= yb;
	    perimeter += Math.sqrt(xa * xa + ya * ya);
	  }

	  return perimeter;
	}

var 	pi$1 = Math.PI;
var 	tau$1 = 2 * pi$1;
	var epsilon = 1e-6;
	var tauEpsilon = tau$1 - epsilon;
	function Path() {
	  this._x0 = this._y0 = // start of current subpath
	  this._x1 = this._y1 = null; // end of current subpath
	  this._ = [];
	}

	function path() {
	  return new Path();
	}

	Path.prototype = path.prototype = {
	  constructor: Path,
	  moveTo: function (x, y) {
	    this._.push("M", this._x0 = this._x1 = +x, ",", this._y0 = this._y1 = +y);
	  },
	  closePath: function () {
	    if (this._x1 !== null) {
	      this._x1 = this._x0, this._y1 = this._y0;
	      this._.push("Z");
	    }
	  },
	  lineTo: function (x, y) {
	    this._.push("L", this._x1 = +x, ",", this._y1 = +y);
	  },
	  quadraticCurveTo: function (x1, y1, x, y) {
	    this._.push("Q", +x1, ",", +y1, ",", this._x1 = +x, ",", this._y1 = +y);
	  },
	  bezierCurveTo: function (x1, y1, x2, y2, x, y) {
	    this._.push("C", +x1, ",", +y1, ",", +x2, ",", +y2, ",", this._x1 = +x, ",", this._y1 = +y);
	  },
	  arcTo: function (x1, y1, x2, y2, r) {
	    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;
	    var x0 = this._x1,
	        y0 = this._y1,
	        x21 = x2 - x1,
	        y21 = y2 - y1,
	        x01 = x0 - x1,
	        y01 = y0 - y1,
	        l01_2 = x01 * x01 + y01 * y01;

	    // Is the radius negative? Error.
	    if (r < 0) throw new Error("negative radius: " + r);

	    // Is this path empty? Move to (x1,y1).
	    if (this._x1 === null) {
	      this._.push("M", this._x1 = x1, ",", this._y1 = y1);
	    }

	    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
	    else if (!(l01_2 > epsilon)) {}

	      // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
	      // Equivalently, is (x1,y1) coincident with (x2,y2)?
	      // Or, is the radius zero? Line to (x1,y1).
	      else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon) || !r) {
	          this._.push("L", this._x1 = x1, ",", this._y1 = y1);
	        }

	        // Otherwise, draw an arc!
	        else {
	            var x20 = x2 - x0,
	                y20 = y2 - y0,
	                l21_2 = x21 * x21 + y21 * y21,
	                l20_2 = x20 * x20 + y20 * y20,
	                l21 = Math.sqrt(l21_2),
	                l01 = Math.sqrt(l01_2),
	                l = r * Math.tan((pi$1 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
	                t01 = l / l01,
	                t21 = l / l21;

	            // If the start tangent is not coincident with (x0,y0), line to.
	            if (Math.abs(t01 - 1) > epsilon) {
	              this._.push("L", x1 + t01 * x01, ",", y1 + t01 * y01);
	            }

	            this._.push("A", r, ",", r, ",0,0,", +(y01 * x20 > x01 * y20), ",", this._x1 = x1 + t21 * x21, ",", this._y1 = y1 + t21 * y21);
	          }
	  },
	  arc: function (x, y, r, a0, a1, ccw) {
	    x = +x, y = +y, r = +r;
	    var dx = r * Math.cos(a0),
	        dy = r * Math.sin(a0),
	        x0 = x + dx,
	        y0 = y + dy,
	        cw = 1 ^ ccw,
	        da = ccw ? a0 - a1 : a1 - a0;

	    // Is the radius negative? Error.
	    if (r < 0) throw new Error("negative radius: " + r);

	    // Is this path empty? Move to (x0,y0).
	    if (this._x1 === null) {
	      this._.push("M", x0, ",", y0);
	    }

	    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
	    else if (Math.abs(this._x1 - x0) > epsilon || Math.abs(this._y1 - y0) > epsilon) {
	        this._.push("L", x0, ",", y0);
	      }

	    // Is this arc empty? We’re done.
	    if (!r) return;

	    // Is this a complete circle? Draw two arcs to complete the circle.
	    if (da > tauEpsilon) {
	      this._.push("A", r, ",", r, ",0,1,", cw, ",", x - dx, ",", y - dy, "A", r, ",", r, ",0,1,", cw, ",", this._x1 = x0, ",", this._y1 = y0);
	    }

	    // Otherwise, draw an arc!
	    else {
	        if (da < 0) da = da % tau$1 + tau$1;
	        this._.push("A", r, ",", r, ",0,", +(da >= pi$1), ",", cw, ",", this._x1 = x + r * Math.cos(a1), ",", this._y1 = y + r * Math.sin(a1));
	      }
	  },
	  rect: function (x, y, w, h) {
	    this._.push("M", this._x0 = this._x1 = +x, ",", this._y0 = this._y1 = +y, "h", +w, "v", +h, "h", -w, "Z");
	  },
	  toString: function () {
	    return this._.join("");
	  }
	};

	function tree_add (d) {
	  var x = +this._x.call(null, d),
	      y = +this._y.call(null, d);
	  return add(this.cover(x, y), x, y, d);
	}

	function add(tree, x, y, d) {
	  if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points

	  var parent,
	      node = tree._root,
	      leaf = { data: d },
	      x0 = tree._x0,
	      y0 = tree._y0,
	      x1 = tree._x1,
	      y1 = tree._y1,
	      xm,
	      ym,
	      xp,
	      yp,
	      right,
	      bottom,
	      i,
	      j;

	  // If the tree is empty, initialize the root as a leaf.
	  if (!node) return tree._root = leaf, tree;

	  // Find the existing leaf for the new point, or add it.
	  while (node.length) {
	    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm;else x1 = xm;
	    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym;else y1 = ym;
	    if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
	  }

	  // Is the new point is exactly coincident with the existing point?
	  xp = +tree._x.call(null, node.data);
	  yp = +tree._y.call(null, node.data);
	  if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;

	  // Otherwise, split the leaf node until the old and new point are separated.
	  do {
	    parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
	    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm;else x1 = xm;
	    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym;else y1 = ym;
	  } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | xp >= xm));
	  return parent[j] = node, parent[i] = leaf, tree;
	}

	function addAll(data) {
	  var d,
	      i,
	      n = data.length,
	      x,
	      y,
	      xz = new Array(n),
	      yz = new Array(n),
	      x0 = Infinity,
	      y0 = Infinity,
	      x1 = -Infinity,
	      y1 = -Infinity;

	  // Compute the points and their extent.
	  for (i = 0; i < n; ++i) {
	    if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
	    xz[i] = x;
	    yz[i] = y;
	    if (x < x0) x0 = x;
	    if (x > x1) x1 = x;
	    if (y < y0) y0 = y;
	    if (y > y1) y1 = y;
	  }

	  // If there were no (valid) points, inherit the existing extent.
	  if (x1 < x0) x0 = this._x0, x1 = this._x1;
	  if (y1 < y0) y0 = this._y0, y1 = this._y1;

	  // Expand the tree to cover the new points.
	  this.cover(x0, y0).cover(x1, y1);

	  // Add the new points.
	  for (i = 0; i < n; ++i) {
	    add(this, xz[i], yz[i], data[i]);
	  }

	  return this;
	}

	function tree_cover (x, y) {
	  if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points

	  var x0 = this._x0,
	      y0 = this._y0,
	      x1 = this._x1,
	      y1 = this._y1;

	  // If the quadtree has no extent, initialize them.
	  // Integer extent are necessary so that if we later double the extent,
	  // the existing quadrant boundaries don’t change due to floating point error!
	  if (isNaN(x0)) {
	    x1 = (x0 = Math.floor(x)) + 1;
	    y1 = (y0 = Math.floor(y)) + 1;
	  }

	  // Otherwise, double repeatedly to cover.
	  else if (x0 > x || x > x1 || y0 > y || y > y1) {
	      var z = x1 - x0,
	          node = this._root,
	          parent,
	          i;

	      switch (i = (y < (y0 + y1) / 2) << 1 | x < (x0 + x1) / 2) {
	        case 0:
	          {
	            do parent = new Array(4), parent[i] = node, node = parent; while ((z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1));
	            break;
	          }
	        case 1:
	          {
	            do parent = new Array(4), parent[i] = node, node = parent; while ((z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1));
	            break;
	          }
	        case 2:
	          {
	            do parent = new Array(4), parent[i] = node, node = parent; while ((z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y));
	            break;
	          }
	        case 3:
	          {
	            do parent = new Array(4), parent[i] = node, node = parent; while ((z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y));
	            break;
	          }
	      }

	      if (this._root && this._root.length) this._root = node;
	    }

	    // If the quadtree covers the point already, just return.
	    else return this;

	  this._x0 = x0;
	  this._y0 = y0;
	  this._x1 = x1;
	  this._y1 = y1;
	  return this;
	}

	function tree_data () {
	  var data = [];
	  this.visit(function (node) {
	    if (!node.length) do data.push(node.data); while (node = node.next);
	  });
	  return data;
	}

	function tree_extent (_) {
	    return arguments.length ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1]) : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
	}

	function Quad (node, x0, y0, x1, y1) {
	  this.node = node;
	  this.x0 = x0;
	  this.y0 = y0;
	  this.x1 = x1;
	  this.y1 = y1;
	}

	function tree_find (x, y, radius) {
	  var data,
	      x0 = this._x0,
	      y0 = this._y0,
	      x1,
	      y1,
	      x2,
	      y2,
	      x3 = this._x1,
	      y3 = this._y1,
	      quads = [],
	      node = this._root,
	      q,
	      i;

	  if (node) quads.push(new Quad(node, x0, y0, x3, y3));
	  if (radius == null) radius = Infinity;else {
	    x0 = x - radius, y0 = y - radius;
	    x3 = x + radius, y3 = y + radius;
	    radius *= radius;
	  }

	  while (q = quads.pop()) {

	    // Stop searching if this quadrant can’t contain a closer node.
	    if (!(node = q.node) || (x1 = q.x0) > x3 || (y1 = q.y0) > y3 || (x2 = q.x1) < x0 || (y2 = q.y1) < y0) continue;

	    // Bisect the current quadrant.
	    if (node.length) {
	      var xm = (x1 + x2) / 2,
	          ym = (y1 + y2) / 2;

	      quads.push(new Quad(node[3], xm, ym, x2, y2), new Quad(node[2], x1, ym, xm, y2), new Quad(node[1], xm, y1, x2, ym), new Quad(node[0], x1, y1, xm, ym));

	      // Visit the closest quadrant first.
	      if (i = (y >= ym) << 1 | x >= xm) {
	        q = quads[quads.length - 1];
	        quads[quads.length - 1] = quads[quads.length - 1 - i];
	        quads[quads.length - 1 - i] = q;
	      }
	    }

	    // Visit this point. (Visiting coincident points isn’t necessary!)
	    else {
	        var dx = x - +this._x.call(null, node.data),
	            dy = y - +this._y.call(null, node.data),
	            d2 = dx * dx + dy * dy;
	        if (d2 < radius) {
	          var d = Math.sqrt(radius = d2);
	          x0 = x - d, y0 = y - d;
	          x3 = x + d, y3 = y + d;
	          data = node.data;
	        }
	      }
	  }

	  return data;
	}

	function tree_remove (d) {
	  if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points

	  var parent,
	      node = this._root,
	      retainer,
	      previous,
	      next,
	      x0 = this._x0,
	      y0 = this._y0,
	      x1 = this._x1,
	      y1 = this._y1,
	      x,
	      y,
	      xm,
	      ym,
	      right,
	      bottom,
	      i,
	      j;

	  // If the tree is empty, initialize the root as a leaf.
	  if (!node) return this;

	  // Find the leaf node for the point.
	  // While descending, also retain the deepest parent with a non-removed sibling.
	  if (node.length) while (true) {
	    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm;else x1 = xm;
	    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym;else y1 = ym;
	    if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
	    if (!node.length) break;
	    if (parent[i + 1 & 3] || parent[i + 2 & 3] || parent[i + 3 & 3]) retainer = parent, j = i;
	  }

	  // Find the point to remove.
	  while (node.data !== d) if (!(previous = node, node = node.next)) return this;
	  if (next = node.next) delete node.next;

	  // If there are multiple coincident points, remove just the point.
	  if (previous) return next ? previous.next = next : delete previous.next, this;

	  // If this is the root point, remove it.
	  if (!parent) return this._root = next, this;

	  // Remove this leaf.
	  next ? parent[i] = next : delete parent[i];

	  // If the parent now contains exactly one leaf, collapse superfluous parents.
	  if ((node = parent[0] || parent[1] || parent[2] || parent[3]) && node === (parent[3] || parent[2] || parent[1] || parent[0]) && !node.length) {
	    if (retainer) retainer[j] = node;else this._root = node;
	  }

	  return this;
	}

	function removeAll(data) {
	  for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
	  return this;
	}

	function tree_root () {
	  return this._root;
	}

	function tree_size () {
	  var size = 0;
	  this.visit(function (node) {
	    if (!node.length) do ++size; while (node = node.next);
	  });
	  return size;
	}

	function tree_visit (callback) {
	  var quads = [],
	      q,
	      node = this._root,
	      child,
	      x0,
	      y0,
	      x1,
	      y1;
	  if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
	  while (q = quads.pop()) {
	    if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
	      var xm = (x0 + x1) / 2,
	          ym = (y0 + y1) / 2;
	      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
	      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
	      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
	      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
	    }
	  }
	  return this;
	}

	function tree_visitAfter (callback) {
	  var quads = [],
	      next = [],
	      q;
	  if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
	  while (q = quads.pop()) {
	    var node = q.node;
	    if (node.length) {
	      var child,
	          x0 = q.x0,
	          y0 = q.y0,
	          x1 = q.x1,
	          y1 = q.y1,
	          xm = (x0 + x1) / 2,
	          ym = (y0 + y1) / 2;
	      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
	      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
	      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
	      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
	    }
	    next.push(q);
	  }
	  while (q = next.pop()) {
	    callback(q.node, q.x0, q.y0, q.x1, q.y1);
	  }
	  return this;
	}

	function defaultX(d) {
	  return d[0];
	}

	function tree_x (_) {
	  return arguments.length ? (this._x = _, this) : this._x;
	}

	function defaultY(d) {
	  return d[1];
	}

	function tree_y (_) {
	  return arguments.length ? (this._y = _, this) : this._y;
	}

	function quadtree(nodes, x, y) {
	  var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
	  return nodes == null ? tree : tree.addAll(nodes);
	}

	function Quadtree(x, y, x0, y0, x1, y1) {
	  this._x = x;
	  this._y = y;
	  this._x0 = x0;
	  this._y0 = y0;
	  this._x1 = x1;
	  this._y1 = y1;
	  this._root = undefined;
	}

	function leaf_copy(leaf) {
	  var copy = { data: leaf.data },
	      next = copy;
	  while (leaf = leaf.next) next = next.next = { data: leaf.data };
	  return copy;
	}

	var treeProto = quadtree.prototype = Quadtree.prototype;

	treeProto.copy = function () {
	  var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
	      node = this._root,
	      nodes,
	      child;

	  if (!node) return copy;

	  if (!node.length) return copy._root = leaf_copy(node), copy;

	  nodes = [{ source: node, target: copy._root = new Array(4) }];
	  while (node = nodes.pop()) {
	    for (var i = 0; i < 4; ++i) {
	      if (child = node.source[i]) {
	        if (child.length) nodes.push({ source: child, target: node.target[i] = new Array(4) });else node.target[i] = leaf_copy(child);
	      }
	    }
	  }

	  return copy;
	};

	treeProto.add = tree_add;
	treeProto.addAll = addAll;
	treeProto.cover = tree_cover;
	treeProto.data = tree_data;
	treeProto.extent = tree_extent;
	treeProto.find = tree_find;
	treeProto.remove = tree_remove;
	treeProto.removeAll = removeAll;
	treeProto.root = tree_root;
	treeProto.size = tree_size;
	treeProto.visit = tree_visit;
	treeProto.visitAfter = tree_visitAfter;
	treeProto.x = tree_x;
	treeProto.y = tree_y;

	var slice$1 = [].slice;

	var noabort = {};

	function Queue(size) {
	  if (!(size >= 1)) throw new Error();
	  this._size = size;
	  this._call = this._error = null;
	  this._tasks = [];
	  this._data = [];
	  this._waiting = this._active = this._ended = this._start = 0; // inside a synchronous task callback?
	}

	Queue.prototype = queue.prototype = {
	  constructor: Queue,
	  defer: function (callback) {
	    if (typeof callback !== "function" || this._call) throw new Error();
	    if (this._error != null) return this;
	    var t = slice$1.call(arguments, 1);
	    t.push(callback);
	    ++this._waiting, this._tasks.push(t);
	    poke(this);
	    return this;
	  },
	  abort: function () {
	    if (this._error == null) abort(this, new Error("abort"));
	    return this;
	  },
	  await: function (callback) {
	    if (typeof callback !== "function" || this._call) throw new Error();
	    this._call = function (error, results) {
	      callback.apply(null, [error].concat(results));
	    };
	    maybeNotify(this);
	    return this;
	  },
	  awaitAll: function (callback) {
	    if (typeof callback !== "function" || this._call) throw new Error();
	    this._call = callback;
	    maybeNotify(this);
	    return this;
	  }
	};

	function poke(q) {
	  if (!q._start) {
	    try {
	      start(q);
	    } // let the current task complete
	    catch (e) {
	      if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously
	      else if (!q._data) throw e; // await callback errored synchronously
	    }
	  }
	}

	function start(q) {
	  while (q._start = q._waiting && q._active < q._size) {
	    var i = q._ended + q._active,
	        t = q._tasks[i],
	        j = t.length - 1,
	        c = t[j];
	    t[j] = end(q, i);
	    --q._waiting, ++q._active;
	    t = c.apply(null, t);
	    if (!q._tasks[i]) continue; // task finished synchronously
	    q._tasks[i] = t || noabort;
	  }
	}

	function end(q, i) {
	  return function (e, r) {
	    if (!q._tasks[i]) return; // ignore multiple callbacks
	    --q._active, ++q._ended;
	    q._tasks[i] = null;
	    if (q._error != null) return; // ignore secondary errors
	    if (e != null) {
	      abort(q, e);
	    } else {
	      q._data[i] = r;
	      if (q._waiting) poke(q);else maybeNotify(q);
	    }
	  };
	}

	function abort(q, e) {
	  var i = q._tasks.length,
	      t;
	  q._error = e; // ignore active callbacks
	  q._data = undefined; // allow gc
	  q._waiting = NaN; // prevent starting

	  while (--i >= 0) {
	    if (t = q._tasks[i]) {
	      q._tasks[i] = null;
	      if (t.abort) {
	        try {
	          t.abort();
	        } catch (e) {/* ignore */}
	      }
	    }
	  }

	  q._active = NaN; // allow notification
	  maybeNotify(q);
	}

	function maybeNotify(q) {
	  if (!q._active && q._call) {
	    var d = q._data;
	    q._data = undefined; // allow gc
	    q._call(q._error, d);
	  }
	}

	function queue(concurrency) {
	  return new Queue(arguments.length ? +concurrency : Infinity);
	}

	function constant$1 (x) {
	  return function constant() {
	    return x;
	  };
	}

	var epsilon$1 = 1e-12;
	var pi$2 = Math.PI;
	var halfPi$1 = pi$2 / 2;
	var tau$2 = 2 * pi$2;

	function arcInnerRadius(d) {
	  return d.innerRadius;
	}

	function arcOuterRadius(d) {
	  return d.outerRadius;
	}

	function arcStartAngle(d) {
	  return d.startAngle;
	}

	function arcEndAngle(d) {
	  return d.endAngle;
	}

	function arcPadAngle(d) {
	  return d && d.padAngle; // Note: optional!
	}

	function asin(x) {
	  return x >= 1 ? halfPi$1 : x <= -1 ? -halfPi$1 : Math.asin(x);
	}

	function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
	  var x10 = x1 - x0,
	      y10 = y1 - y0,
	      x32 = x3 - x2,
	      y32 = y3 - y2,
	      t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);
	  return [x0 + t * x10, y0 + t * y10];
	}

	// Compute perpendicular offset line of length rc.
	// http://mathworld.wolfram.com/Circle-LineIntersection.html
	function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
	  var x01 = x0 - x1,
	      y01 = y0 - y1,
	      lo = (cw ? rc : -rc) / Math.sqrt(x01 * x01 + y01 * y01),
	      ox = lo * y01,
	      oy = -lo * x01,
	      x11 = x0 + ox,
	      y11 = y0 + oy,
	      x10 = x1 + ox,
	      y10 = y1 + oy,
	      x00 = (x11 + x10) / 2,
	      y00 = (y11 + y10) / 2,
	      dx = x10 - x11,
	      dy = y10 - y11,
	      d2 = dx * dx + dy * dy,
	      r = r1 - rc,
	      D = x11 * y10 - x10 * y11,
	      d = (dy < 0 ? -1 : 1) * Math.sqrt(Math.max(0, r * r * d2 - D * D)),
	      cx0 = (D * dy - dx * d) / d2,
	      cy0 = (-D * dx - dy * d) / d2,
	      cx1 = (D * dy + dx * d) / d2,
	      cy1 = (-D * dx + dy * d) / d2,
	      dx0 = cx0 - x00,
	      dy0 = cy0 - y00,
	      dx1 = cx1 - x00,
	      dy1 = cy1 - y00;

	  // Pick the closer of the two intersection points.
	  // TODO Is there a faster way to determine which intersection to use?
	  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;

	  return {
	    cx: cx0,
	    cy: cy0,
	    x01: -ox,
	    y01: -oy,
	    x11: cx0 * (r1 / r - 1),
	    y11: cy0 * (r1 / r - 1)
	  };
	}

	function arc () {
	  var innerRadius = arcInnerRadius,
	      outerRadius = arcOuterRadius,
	      cornerRadius = constant$1(0),
	      padRadius = null,
	      startAngle = arcStartAngle,
	      endAngle = arcEndAngle,
	      padAngle = arcPadAngle,
	      context = null;

	  function arc() {
	    var buffer,
	        r,
	        r0 = +innerRadius.apply(this, arguments),
	        r1 = +outerRadius.apply(this, arguments),
	        a0 = startAngle.apply(this, arguments) - halfPi$1,
	        a1 = endAngle.apply(this, arguments) - halfPi$1,
	        da = Math.abs(a1 - a0),
	        cw = a1 > a0;

	    if (!context) context = buffer = path();

	    // Ensure that the outer radius is always larger than the inner radius.
	    if (r1 < r0) r = r1, r1 = r0, r0 = r;

	    // Is it a point?
	    if (!(r1 > epsilon$1)) context.moveTo(0, 0);

	    // Or is it a circle or annulus?
	    else if (da > tau$2 - epsilon$1) {
	        context.moveTo(r1 * Math.cos(a0), r1 * Math.sin(a0));
	        context.arc(0, 0, r1, a0, a1, !cw);
	        if (r0 > epsilon$1) {
	          context.moveTo(r0 * Math.cos(a1), r0 * Math.sin(a1));
	          context.arc(0, 0, r0, a1, a0, cw);
	        }
	      }

	      // Or is it a circular or annular sector?
	      else {
	          var a01 = a0,
	              a11 = a1,
	              a00 = a0,
	              a10 = a1,
	              da0 = da,
	              da1 = da,
	              ap = padAngle.apply(this, arguments) / 2,
	              rp = ap > epsilon$1 && (padRadius ? +padRadius.apply(this, arguments) : Math.sqrt(r0 * r0 + r1 * r1)),
	              rc = Math.min(Math.abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
	              rc0 = rc,
	              rc1 = rc,
	              t0,
	              t1;

	          // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
	          if (rp > epsilon$1) {
	            var p0 = asin(rp / r0 * Math.sin(ap)),
	                p1 = asin(rp / r1 * Math.sin(ap));
	            if ((da0 -= p0 * 2) > epsilon$1) p0 *= cw ? 1 : -1, a00 += p0, a10 -= p0;else da0 = 0, a00 = a10 = (a0 + a1) / 2;
	            if ((da1 -= p1 * 2) > epsilon$1) p1 *= cw ? 1 : -1, a01 += p1, a11 -= p1;else da1 = 0, a01 = a11 = (a0 + a1) / 2;
	          }

	          var x01 = r1 * Math.cos(a01),
	              y01 = r1 * Math.sin(a01),
	              x10 = r0 * Math.cos(a10),
	              y10 = r0 * Math.sin(a10);

	          // Apply rounded corners?
	          if (rc > epsilon$1) {
	            var x11 = r1 * Math.cos(a11),
	                y11 = r1 * Math.sin(a11),
	                x00 = r0 * Math.cos(a00),
	                y00 = r0 * Math.sin(a00);

	            // Restrict the corner radius according to the sector angle.
	            if (da < pi$2) {
	              var oc = da0 > epsilon$1 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],
	                  ax = x01 - oc[0],
	                  ay = y01 - oc[1],
	                  bx = x11 - oc[0],
	                  by = y11 - oc[1],
	                  kc = 1 / Math.sin(Math.acos((ax * bx + ay * by) / (Math.sqrt(ax * ax + ay * ay) * Math.sqrt(bx * bx + by * by))) / 2),
	                  lc = Math.sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
	              rc0 = Math.min(rc, (r0 - lc) / (kc - 1));
	              rc1 = Math.min(rc, (r1 - lc) / (kc + 1));
	            }
	          }

	          // Is the sector collapsed to a line?
	          if (!(da1 > epsilon$1)) context.moveTo(x01, y01);

	          // Does the sector’s outer ring have rounded corners?
	          else if (rc1 > epsilon$1) {
	              t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
	              t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);

	              context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);

	              // Have the corners merged?
	              if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);

	              // Otherwise, draw the two corners and the ring.
	              else {
	                  context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);
	                  context.arc(0, 0, r1, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
	                  context.arc(t1.cx, t1.cy, rc1, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);
	                }
	            }

	            // Or is the outer ring just a circular arc?
	            else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);

	          // Is there no inner ring, and it’s a circular sector?
	          // Or perhaps it’s an annular sector collapsed due to padding?
	          if (!(r0 > epsilon$1) || !(da0 > epsilon$1)) context.lineTo(x10, y10);

	          // Does the sector’s inner ring (or point) have rounded corners?
	          else if (rc0 > epsilon$1) {
	              t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
	              t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);

	              context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);

	              // Have the corners merged?
	              if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);

	              // Otherwise, draw the two corners and the ring.
	              else {
	                  context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);
	                  context.arc(0, 0, r0, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);
	                  context.arc(t1.cx, t1.cy, rc0, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);
	                }
	            }

	            // Or is the inner ring just a circular arc?
	            else context.arc(0, 0, r0, a10, a00, cw);
	        }

	    context.closePath();

	    if (buffer) return context = null, buffer + "" || null;
	  }

	  arc.centroid = function () {
	    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
	        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$2 / 2;
	    return [Math.cos(a) * r, Math.sin(a) * r];
	  };

	  arc.innerRadius = function (_) {
	    return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$1(+_), arc) : innerRadius;
	  };

	  arc.outerRadius = function (_) {
	    return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$1(+_), arc) : outerRadius;
	  };

	  arc.cornerRadius = function (_) {
	    return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$1(+_), arc) : cornerRadius;
	  };

	  arc.padRadius = function (_) {
	    return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$1(+_), arc) : padRadius;
	  };

	  arc.startAngle = function (_) {
	    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$1(+_), arc) : startAngle;
	  };

	  arc.endAngle = function (_) {
	    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$1(+_), arc) : endAngle;
	  };

	  arc.padAngle = function (_) {
	    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$1(+_), arc) : padAngle;
	  };

	  arc.context = function (_) {
	    return arguments.length ? (context = _ == null ? null : _, arc) : context;
	  };

	  return arc;
	}

	function Linear(context) {
	  this._context = context;
	}

	Linear.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._point = 0;
	  },
	  lineEnd: function () {
	    if (this._line || this._line !== 0 && this._point === 1) this._context.closePath();
	    this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    switch (this._point) {
	      case 0:
	        this._point = 1;this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);break;
	      case 1:
	        this._point = 2; // proceed
	      default:
	        this._context.lineTo(x, y);break;
	    }
	  }
	};

	function curveLinear (context) {
	  return new Linear(context);
	}

	function x(p) {
	  return p[0];
	}

	function y(p) {
	  return p[1];
	}

	function line () {
	  var x$$ = x,
	      y$$ = y,
	      defined = constant$1(true),
	      context = null,
	      curve = curveLinear,
	      output = null;

	  function line(data) {
	    var i,
	        n = data.length,
	        d,
	        defined0 = false,
	        buffer;

	    if (context == null) output = curve(buffer = path());

	    for (i = 0; i <= n; ++i) {
	      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
	        if (defined0 = !defined0) output.lineStart();else output.lineEnd();
	      }
	      if (defined0) output.point(+x$$(d, i, data), +y$$(d, i, data));
	    }

	    if (buffer) return output = null, buffer + "" || null;
	  }

	  line.x = function (_) {
	    return arguments.length ? (x$$ = typeof _ === "function" ? _ : constant$1(+_), line) : x$$;
	  };

	  line.y = function (_) {
	    return arguments.length ? (y$$ = typeof _ === "function" ? _ : constant$1(+_), line) : y$$;
	  };

	  line.defined = function (_) {
	    return arguments.length ? (defined = typeof _ === "function" ? _ : constant$1(!!_), line) : defined;
	  };

	  line.curve = function (_) {
	    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
	  };

	  line.context = function (_) {
	    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
	  };

	  return line;
	}

	function area () {
	  var x0 = x,
	      x1 = null,
	      y0 = constant$1(0),
	      y1 = y,
	      defined = constant$1(true),
	      context = null,
	      curve = curveLinear,
	      output = null;

	  function area(data) {
	    var i,
	        j,
	        k,
	        n = data.length,
	        d,
	        defined0 = false,
	        buffer,
	        x0z = new Array(n),
	        y0z = new Array(n);

	    if (context == null) output = curve(buffer = path());

	    for (i = 0; i <= n; ++i) {
	      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
	        if (defined0 = !defined0) {
	          j = i;
	          output.areaStart();
	          output.lineStart();
	        } else {
	          output.lineEnd();
	          output.lineStart();
	          for (k = i - 1; k >= j; --k) {
	            output.point(x0z[k], y0z[k]);
	          }
	          output.lineEnd();
	          output.areaEnd();
	        }
	      }
	      if (defined0) {
	        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
	        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
	      }
	    }

	    if (buffer) return output = null, buffer + "" || null;
	  }

	  function arealine() {
	    return line().defined(defined).curve(curve).context(context);
	  }

	  area.x = function (_) {
	    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$1(+_), x1 = null, area) : x0;
	  };

	  area.x0 = function (_) {
	    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$1(+_), area) : x0;
	  };

	  area.x1 = function (_) {
	    return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$1(+_), area) : x1;
	  };

	  area.y = function (_) {
	    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$1(+_), y1 = null, area) : y0;
	  };

	  area.y0 = function (_) {
	    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$1(+_), area) : y0;
	  };

	  area.y1 = function (_) {
	    return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$1(+_), area) : y1;
	  };

	  area.lineX0 = area.lineY0 = function () {
	    return arealine().x(x0).y(y0);
	  };

	  area.lineY1 = function () {
	    return arealine().x(x0).y(y1);
	  };

	  area.lineX1 = function () {
	    return arealine().x(x1).y(y0);
	  };

	  area.defined = function (_) {
	    return arguments.length ? (defined = typeof _ === "function" ? _ : constant$1(!!_), area) : defined;
	  };

	  area.curve = function (_) {
	    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
	  };

	  area.context = function (_) {
	    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
	  };

	  return area;
	}

	function descending$1 (a, b) {
	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
	}

	function identity$1 (d) {
	  return d;
	}

	function pie () {
	  var value = identity$1,
	      sortValues = descending$1,
	      sort = null,
	      startAngle = constant$1(0),
	      endAngle = constant$1(tau$2),
	      padAngle = constant$1(0);

	  function pie(data) {
	    var i,
	        n = data.length,
	        j,
	        k,
	        sum = 0,
	        index = new Array(n),
	        arcs = new Array(n),
	        a0 = +startAngle.apply(this, arguments),
	        da = Math.min(tau$2, Math.max(-tau$2, endAngle.apply(this, arguments) - a0)),
	        a1,
	        p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
	        pa = p * (da < 0 ? -1 : 1),
	        v;

	    for (i = 0; i < n; ++i) {
	      if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
	        sum += v;
	      }
	    }

	    // Optionally sort the arcs by previously-computed values or by data.
	    if (sortValues != null) index.sort(function (i, j) {
	      return sortValues(arcs[i], arcs[j]);
	    });else if (sort != null) index.sort(function (i, j) {
	      return sort(data[i], data[j]);
	    });

	    // Compute the arcs! They are stored in the original data's order.
	    for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
	      j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
	        data: data[j],
	        index: i,
	        value: v,
	        startAngle: a0,
	        endAngle: a1,
	        padAngle: p
	      };
	    }

	    return arcs;
	  }

	  pie.value = function (_) {
	    return arguments.length ? (value = typeof _ === "function" ? _ : constant$1(+_), pie) : value;
	  };

	  pie.sortValues = function (_) {
	    return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
	  };

	  pie.sort = function (_) {
	    return arguments.length ? (sort = _, sortValues = null, pie) : sort;
	  };

	  pie.startAngle = function (_) {
	    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$1(+_), pie) : startAngle;
	  };

	  pie.endAngle = function (_) {
	    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$1(+_), pie) : endAngle;
	  };

	  pie.padAngle = function (_) {
	    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$1(+_), pie) : padAngle;
	  };

	  return pie;
	}

	var curveRadialLinear = curveRadial(curveLinear);

	function Radial(curve) {
	  this._curve = curve;
	}

	Radial.prototype = {
	  areaStart: function () {
	    this._curve.areaStart();
	  },
	  areaEnd: function () {
	    this._curve.areaEnd();
	  },
	  lineStart: function () {
	    this._curve.lineStart();
	  },
	  lineEnd: function () {
	    this._curve.lineEnd();
	  },
	  point: function (a, r) {
	    this._curve.point(r * Math.sin(a), r * -Math.cos(a));
	  }
	};

	function curveRadial(curve) {

	  function radial(context) {
	    return new Radial(curve(context));
	  }

	  radial._curve = curve;

	  return radial;
	}

	function radialLine(l) {
	  var c = l.curve;

	  l.angle = l.x, delete l.x;
	  l.radius = l.y, delete l.y;

	  l.curve = function (_) {
	    return arguments.length ? c(curveRadial(_)) : c()._curve;
	  };

	  return l;
	}

	function radialLine$1 () {
	  return radialLine(line().curve(curveRadialLinear));
	}

	function radialArea () {
	  var a = area().curve(curveRadialLinear),
	      c = a.curve,
	      x0 = a.lineX0,
	      x1 = a.lineX1,
	      y0 = a.lineY0,
	      y1 = a.lineY1;

	  a.angle = a.x, delete a.x;
	  a.startAngle = a.x0, delete a.x0;
	  a.endAngle = a.x1, delete a.x1;
	  a.radius = a.y, delete a.y;
	  a.innerRadius = a.y0, delete a.y0;
	  a.outerRadius = a.y1, delete a.y1;
	  a.lineStartAngle = function () {
	    return radialLine(x0());
	  }, delete a.lineX0;
	  a.lineEndAngle = function () {
	    return radialLine(x1());
	  }, delete a.lineX1;
	  a.lineInnerRadius = function () {
	    return radialLine(y0());
	  }, delete a.lineY0;
	  a.lineOuterRadius = function () {
	    return radialLine(y1());
	  }, delete a.lineY1;

	  a.curve = function (_) {
	    return arguments.length ? c(curveRadial(_)) : c()._curve;
	  };

	  return a;
	}

	var circle = {
	  draw: function (context, size) {
	    var r = Math.sqrt(size / pi$2);
	    context.moveTo(r, 0);
	    context.arc(0, 0, r, 0, tau$2);
	  }
	};

	var cross$1 = {
	  draw: function (context, size) {
	    var r = Math.sqrt(size / 5) / 2;
	    context.moveTo(-3 * r, -r);
	    context.lineTo(-r, -r);
	    context.lineTo(-r, -3 * r);
	    context.lineTo(r, -3 * r);
	    context.lineTo(r, -r);
	    context.lineTo(3 * r, -r);
	    context.lineTo(3 * r, r);
	    context.lineTo(r, r);
	    context.lineTo(r, 3 * r);
	    context.lineTo(-r, 3 * r);
	    context.lineTo(-r, r);
	    context.lineTo(-3 * r, r);
	    context.closePath();
	  }
	};

	var tan30 = Math.sqrt(1 / 3);
	var tan30_2 = tan30 * 2;
	var diamond = {
	  draw: function (context, size) {
	    var y = Math.sqrt(size / tan30_2),
	        x = y * tan30;
	    context.moveTo(0, -y);
	    context.lineTo(x, 0);
	    context.lineTo(0, y);
	    context.lineTo(-x, 0);
	    context.closePath();
	  }
	};

	var ka = 0.89081309152928522810;
	var kr = Math.sin(pi$2 / 10) / Math.sin(7 * pi$2 / 10);
	var kx = Math.sin(tau$2 / 10) * kr;
	var ky = -Math.cos(tau$2 / 10) * kr;
	var star = {
	    draw: function (context, size) {
	        var r = Math.sqrt(size * ka),
	            x = kx * r,
	            y = ky * r;
	        context.moveTo(0, -r);
	        context.lineTo(x, y);
	        for (var i = 1; i < 5; ++i) {
	            var a = tau$2 * i / 5,
	                c = Math.cos(a),
	                s = Math.sin(a);
	            context.lineTo(s * r, -c * r);
	            context.lineTo(c * x - s * y, s * x + c * y);
	        }
	        context.closePath();
	    }
	};

	var square = {
	  draw: function (context, size) {
	    var w = Math.sqrt(size),
	        x = -w / 2;
	    context.rect(x, x, w, w);
	  }
	};

	var sqrt3 = Math.sqrt(3);

	var triangle = {
	  draw: function (context, size) {
	    var y = -Math.sqrt(size / (sqrt3 * 3));
	    context.moveTo(0, y * 2);
	    context.lineTo(-sqrt3 * y, -y);
	    context.lineTo(sqrt3 * y, -y);
	    context.closePath();
	  }
	};

	var c = -0.5;
	var s = Math.sqrt(3) / 2;
	var k = 1 / Math.sqrt(12);
	var a = (k / 2 + 1) * 3;
	var wye = {
	    draw: function (context, size) {
	        var r = Math.sqrt(size / a),
	            x0 = r / 2,
	            y0 = r * k,
	            x1 = x0,
	            y1 = r * k + r,
	            x2 = -x1,
	            y2 = y1;
	        context.moveTo(x0, y0);
	        context.lineTo(x1, y1);
	        context.lineTo(x2, y2);
	        context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
	        context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
	        context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
	        context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
	        context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
	        context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
	        context.closePath();
	    }
	};

	var symbols = [circle, cross$1, diamond, square, star, triangle, wye];

	function symbol () {
	  var type = constant$1(circle),
	      size = constant$1(64),
	      context = null;

	  function symbol() {
	    var buffer;
	    if (!context) context = buffer = path();
	    type.apply(this, arguments).draw(context, +size.apply(this, arguments));
	    if (buffer) return context = null, buffer + "" || null;
	  }

	  symbol.type = function (_) {
	    return arguments.length ? (type = typeof _ === "function" ? _ : constant$1(_), symbol) : type;
	  };

	  symbol.size = function (_) {
	    return arguments.length ? (size = typeof _ === "function" ? _ : constant$1(+_), symbol) : size;
	  };

	  symbol.context = function (_) {
	    return arguments.length ? (context = _ == null ? null : _, symbol) : context;
	  };

	  return symbol;
	}

	function noop () {}

	function point(that, x, y) {
	  that._context.bezierCurveTo((2 * that._x0 + that._x1) / 3, (2 * that._y0 + that._y1) / 3, (that._x0 + 2 * that._x1) / 3, (that._y0 + 2 * that._y1) / 3, (that._x0 + 4 * that._x1 + x) / 6, (that._y0 + 4 * that._y1 + y) / 6);
	}

	function Basis(context) {
	  this._context = context;
	}

	Basis.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x0 = this._x1 = this._y0 = this._y1 = NaN;
	    this._point = 0;
	  },
	  lineEnd: function () {
	    switch (this._point) {
	      case 3:
	        point(this, this._x1, this._y1); // proceed
	      case 2:
	        this._context.lineTo(this._x1, this._y1);break;
	    }
	    if (this._line || this._line !== 0 && this._point === 1) this._context.closePath();
	    this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    switch (this._point) {
	      case 0:
	        this._point = 1;this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);break;
	      case 1:
	        this._point = 2;break;
	      case 2:
	        this._point = 3;this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed
	      default:
	        point(this, x, y);break;
	    }
	    this._x0 = this._x1, this._x1 = x;
	    this._y0 = this._y1, this._y1 = y;
	  }
	};

	function curveBasis (context) {
	  return new Basis(context);
	}

	function BasisClosed(context) {
	  this._context = context;
	}

	BasisClosed.prototype = {
	  areaStart: noop,
	  areaEnd: noop,
	  lineStart: function () {
	    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
	    this._point = 0;
	  },
	  lineEnd: function () {
	    switch (this._point) {
	      case 1:
	        {
	          this._context.moveTo(this._x2, this._y2);
	          this._context.closePath();
	          break;
	        }
	      case 2:
	        {
	          this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
	          this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
	          this._context.closePath();
	          break;
	        }
	      case 3:
	        {
	          this.point(this._x2, this._y2);
	          this.point(this._x3, this._y3);
	          this.point(this._x4, this._y4);
	          break;
	        }
	    }
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    switch (this._point) {
	      case 0:
	        this._point = 1;this._x2 = x, this._y2 = y;break;
	      case 1:
	        this._point = 2;this._x3 = x, this._y3 = y;break;
	      case 2:
	        this._point = 3;this._x4 = x, this._y4 = y;this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6);break;
	      default:
	        point(this, x, y);break;
	    }
	    this._x0 = this._x1, this._x1 = x;
	    this._y0 = this._y1, this._y1 = y;
	  }
	};

	function curveBasisClosed (context) {
	  return new BasisClosed(context);
	}

	function BasisOpen(context) {
	  this._context = context;
	}

	BasisOpen.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x0 = this._x1 = this._y0 = this._y1 = NaN;
	    this._point = 0;
	  },
	  lineEnd: function () {
	    if (this._line || this._line !== 0 && this._point === 3) this._context.closePath();
	    this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    switch (this._point) {
	      case 0:
	        this._point = 1;break;
	      case 1:
	        this._point = 2;break;
	      case 2:
	        this._point = 3;var x0 = (this._x0 + 4 * this._x1 + x) / 6,
	            y0 = (this._y0 + 4 * this._y1 + y) / 6;this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0);break;
	      case 3:
	        this._point = 4; // proceed
	      default:
	        point(this, x, y);break;
	    }
	    this._x0 = this._x1, this._x1 = x;
	    this._y0 = this._y1, this._y1 = y;
	  }
	};

	function curveBasisOpen (context) {
	  return new BasisOpen(context);
	}

	function Bundle(context, beta) {
	  this._basis = new Basis(context);
	  this._beta = beta;
	}

	Bundle.prototype = {
	  lineStart: function () {
	    this._x = [];
	    this._y = [];
	    this._basis.lineStart();
	  },
	  lineEnd: function () {
	    var x = this._x,
	        y = this._y,
	        j = x.length - 1;

	    if (j > 0) {
	      var x0 = x[0],
	          y0 = y[0],
	          dx = x[j] - x0,
	          dy = y[j] - y0,
	          i = -1,
	          t;

	      while (++i <= j) {
	        t = i / j;
	        this._basis.point(this._beta * x[i] + (1 - this._beta) * (x0 + t * dx), this._beta * y[i] + (1 - this._beta) * (y0 + t * dy));
	      }
	    }

	    this._x = this._y = null;
	    this._basis.lineEnd();
	  },
	  point: function (x, y) {
	    this._x.push(+x);
	    this._y.push(+y);
	  }
	};

	var curveBundle = (function custom(beta) {

	  function bundle(context) {
	    return beta === 1 ? new Basis(context) : new Bundle(context, beta);
	  }

	  bundle.beta = function (beta) {
	    return custom(+beta);
	  };

	  return bundle;
	})(0.85);

	function point$1(that, x, y) {
	  that._context.bezierCurveTo(that._x1 + that._k * (that._x2 - that._x0), that._y1 + that._k * (that._y2 - that._y0), that._x2 + that._k * (that._x1 - x), that._y2 + that._k * (that._y1 - y), that._x2, that._y2);
	}

	function Cardinal(context, tension) {
	  this._context = context;
	  this._k = (1 - tension) / 6;
	}

	Cardinal.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x0 = this._x1 = this._x2 = this._y0 = this._y1 = this._y2 = NaN;
	    this._point = 0;
	  },
	  lineEnd: function () {
	    switch (this._point) {
	      case 2:
	        this._context.lineTo(this._x2, this._y2);break;
	      case 3:
	        point$1(this, this._x1, this._y1);break;
	    }
	    if (this._line || this._line !== 0 && this._point === 1) this._context.closePath();
	    this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    switch (this._point) {
	      case 0:
	        this._point = 1;this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);break;
	      case 1:
	        this._point = 2;this._x1 = x, this._y1 = y;break;
	      case 2:
	        this._point = 3; // proceed
	      default:
	        point$1(this, x, y);break;
	    }
	    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
	    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
	  }
	};

	var curveCardinal = (function custom(tension) {

	  function cardinal(context) {
	    return new Cardinal(context, tension);
	  }

	  cardinal.tension = function (tension) {
	    return custom(+tension);
	  };

	  return cardinal;
	})(0);

	function CardinalClosed(context, tension) {
	  this._context = context;
	  this._k = (1 - tension) / 6;
	}

	CardinalClosed.prototype = {
	  areaStart: noop,
	  areaEnd: noop,
	  lineStart: function () {
	    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 = this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
	    this._point = 0;
	  },
	  lineEnd: function () {
	    switch (this._point) {
	      case 1:
	        {
	          this._context.moveTo(this._x3, this._y3);
	          this._context.closePath();
	          break;
	        }
	      case 2:
	        {
	          this._context.lineTo(this._x3, this._y3);
	          this._context.closePath();
	          break;
	        }
	      case 3:
	        {
	          this.point(this._x3, this._y3);
	          this.point(this._x4, this._y4);
	          this.point(this._x5, this._y5);
	          break;
	        }
	    }
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    switch (this._point) {
	      case 0:
	        this._point = 1;this._x3 = x, this._y3 = y;break;
	      case 1:
	        this._point = 2;this._context.moveTo(this._x4 = x, this._y4 = y);break;
	      case 2:
	        this._point = 3;this._x5 = x, this._y5 = y;break;
	      default:
	        point$1(this, x, y);break;
	    }
	    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
	    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
	  }
	};

	var curveCardinalClosed = (function custom(tension) {

	  function cardinal(context) {
	    return new CardinalClosed(context, tension);
	  }

	  cardinal.tension = function (tension) {
	    return custom(+tension);
	  };

	  return cardinal;
	})(0);

	function CardinalOpen(context, tension) {
	  this._context = context;
	  this._k = (1 - tension) / 6;
	}

	CardinalOpen.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x0 = this._x1 = this._x2 = this._y0 = this._y1 = this._y2 = NaN;
	    this._point = 0;
	  },
	  lineEnd: function () {
	    if (this._line || this._line !== 0 && this._point === 3) this._context.closePath();
	    this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    switch (this._point) {
	      case 0:
	        this._point = 1;break;
	      case 1:
	        this._point = 2;break;
	      case 2:
	        this._point = 3;this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2);break;
	      case 3:
	        this._point = 4; // proceed
	      default:
	        point$1(this, x, y);break;
	    }
	    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
	    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
	  }
	};

	var curveCardinalOpen = (function custom(tension) {

	  function cardinal(context) {
	    return new CardinalOpen(context, tension);
	  }

	  cardinal.tension = function (tension) {
	    return custom(+tension);
	  };

	  return cardinal;
	})(0);

	function point$2(that, x, y) {
	  var x1 = that._x1,
	      y1 = that._y1,
	      x2 = that._x2,
	      y2 = that._y2;

	  if (that._l01_a > epsilon$1) {
	    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
	        n = 3 * that._l01_a * (that._l01_a + that._l12_a);
	    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
	    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
	  }

	  if (that._l23_a > epsilon$1) {
	    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
	        m = 3 * that._l23_a * (that._l23_a + that._l12_a);
	    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
	    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
	  }

	  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
	}

	function CatmullRom(context, alpha) {
	  this._context = context;
	  this._alpha = alpha;
	}

	CatmullRom.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x0 = this._x1 = this._x2 = this._y0 = this._y1 = this._y2 = NaN;
	    this._l01_a = this._l12_a = this._l23_a = this._l01_2a = this._l12_2a = this._l23_2a = this._point = 0;
	  },
	  lineEnd: function () {
	    switch (this._point) {
	      case 2:
	        this._context.lineTo(this._x2, this._y2);break;
	      case 3:
	        this.point(this._x2, this._y2);break;
	    }
	    if (this._line || this._line !== 0 && this._point === 1) this._context.closePath();
	    this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    x = +x, y = +y;

	    if (this._point) {
	      var x23 = this._x2 - x,
	          y23 = this._y2 - y;
	      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
	    }

	    switch (this._point) {
	      case 0:
	        this._point = 1;this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);break;
	      case 1:
	        this._point = 2;break;
	      case 2:
	        this._point = 3; // proceed
	      default:
	        point$2(this, x, y);break;
	    }

	    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
	    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
	    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
	    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
	  }
	};

	var curveCatmullRom = (function custom(alpha) {

	  function catmullRom(context) {
	    return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
	  }

	  catmullRom.alpha = function (alpha) {
	    return custom(+alpha);
	  };

	  return catmullRom;
	})(0.5);

	function CatmullRomClosed(context, alpha) {
	  this._context = context;
	  this._alpha = alpha;
	}

	CatmullRomClosed.prototype = {
	  areaStart: noop,
	  areaEnd: noop,
	  lineStart: function () {
	    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 = this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
	    this._l01_a = this._l12_a = this._l23_a = this._l01_2a = this._l12_2a = this._l23_2a = this._point = 0;
	  },
	  lineEnd: function () {
	    switch (this._point) {
	      case 1:
	        {
	          this._context.moveTo(this._x3, this._y3);
	          this._context.closePath();
	          break;
	        }
	      case 2:
	        {
	          this._context.lineTo(this._x3, this._y3);
	          this._context.closePath();
	          break;
	        }
	      case 3:
	        {
	          this.point(this._x3, this._y3);
	          this.point(this._x4, this._y4);
	          this.point(this._x5, this._y5);
	          break;
	        }
	    }
	  },
	  point: function (x, y) {
	    x = +x, y = +y;

	    if (this._point) {
	      var x23 = this._x2 - x,
	          y23 = this._y2 - y;
	      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
	    }

	    switch (this._point) {
	      case 0:
	        this._point = 1;this._x3 = x, this._y3 = y;break;
	      case 1:
	        this._point = 2;this._context.moveTo(this._x4 = x, this._y4 = y);break;
	      case 2:
	        this._point = 3;this._x5 = x, this._y5 = y;break;
	      default:
	        point$2(this, x, y);break;
	    }

	    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
	    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
	    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
	    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
	  }
	};

	var curveCatmullRomClosed = (function custom(alpha) {

	  function catmullRom(context) {
	    return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
	  }

	  catmullRom.alpha = function (alpha) {
	    return custom(+alpha);
	  };

	  return catmullRom;
	})(0.5);

	function CatmullRomOpen(context, alpha) {
	  this._context = context;
	  this._alpha = alpha;
	}

	CatmullRomOpen.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x0 = this._x1 = this._x2 = this._y0 = this._y1 = this._y2 = NaN;
	    this._l01_a = this._l12_a = this._l23_a = this._l01_2a = this._l12_2a = this._l23_2a = this._point = 0;
	  },
	  lineEnd: function () {
	    if (this._line || this._line !== 0 && this._point === 3) this._context.closePath();
	    this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    x = +x, y = +y;

	    if (this._point) {
	      var x23 = this._x2 - x,
	          y23 = this._y2 - y;
	      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
	    }

	    switch (this._point) {
	      case 0:
	        this._point = 1;break;
	      case 1:
	        this._point = 2;break;
	      case 2:
	        this._point = 3;this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2);break;
	      case 3:
	        this._point = 4; // proceed
	      default:
	        point$2(this, x, y);break;
	    }

	    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
	    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
	    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
	    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
	  }
	};

	var curveCatmullRomOpen = (function custom(alpha) {

	  function catmullRom(context) {
	    return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
	  }

	  catmullRom.alpha = function (alpha) {
	    return custom(+alpha);
	  };

	  return catmullRom;
	})(0.5);

	function LinearClosed(context) {
	  this._context = context;
	}

	LinearClosed.prototype = {
	  areaStart: noop,
	  areaEnd: noop,
	  lineStart: function () {
	    this._point = 0;
	  },
	  lineEnd: function () {
	    if (this._point) this._context.closePath();
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    if (this._point) this._context.lineTo(x, y);else this._point = 1, this._context.moveTo(x, y);
	  }
	};

	function curveLinearClosed (context) {
	  return new LinearClosed(context);
	}

	function sign(x) {
	  return x < 0 ? -1 : 1;
	}

	// Calculate the slopes of the tangents (Hermite-type interpolation) based on
	// the following paper: Steffen, M. 1990. A Simple Method for Monotonic
	// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
	// NOV(II), P. 443, 1990.
	function slope3(that, x2, y2) {
	  var h0 = that._x1 - that._x0,
	      h1 = x2 - that._x1,
	      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
	      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
	      p = (s0 * h1 + s1 * h0) / (h0 + h1);
	  return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
	}

	// Calculate a one-sided slope.
	function slope2(that, t) {
	  var h = that._x1 - that._x0;
	  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
	}

	// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
	// "you can express cubic Hermite interpolation in terms of cubic Bézier curves
	// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
	function point$3(that, t0, t1) {
	  var x0 = that._x0,
	      y0 = that._y0,
	      x1 = that._x1,
	      y1 = that._y1,
	      dx = (x1 - x0) / 3;
	  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
	}

	function MonotoneX(context) {
	  this._context = context;
	}

	MonotoneX.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x0 = this._x1 = this._y0 = this._y1 = this._t0 = NaN;
	    this._point = 0;
	  },
	  lineEnd: function () {
	    switch (this._point) {
	      case 2:
	        this._context.lineTo(this._x1, this._y1);break;
	      case 3:
	        point$3(this, this._t0, slope2(this, this._t0));break;
	    }
	    if (this._line || this._line !== 0 && this._point === 1) this._context.closePath();
	    this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    var t1 = NaN;

	    x = +x, y = +y;
	    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
	    switch (this._point) {
	      case 0:
	        this._point = 1;this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);break;
	      case 1:
	        this._point = 2;break;
	      case 2:
	        this._point = 3;point$3(this, slope2(this, t1 = slope3(this, x, y)), t1);break;
	      default:
	        point$3(this, this._t0, t1 = slope3(this, x, y));break;
	    }

	    this._x0 = this._x1, this._x1 = x;
	    this._y0 = this._y1, this._y1 = y;
	    this._t0 = t1;
	  }
	};

	function MonotoneY(context) {
	  this._context = new ReflectContext(context);
	}

	(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function (x, y) {
	  MonotoneX.prototype.point.call(this, y, x);
	};

	function ReflectContext(context) {
	  this._context = context;
	}

	ReflectContext.prototype = {
	  moveTo: function (x, y) {
	    this._context.moveTo(y, x);
	  },
	  closePath: function () {
	    this._context.closePath();
	  },
	  lineTo: function (x, y) {
	    this._context.lineTo(y, x);
	  },
	  bezierCurveTo: function (x1, y1, x2, y2, x, y) {
	    this._context.bezierCurveTo(y1, x1, y2, x2, y, x);
	  }
	};

	function monotoneX(context) {
	  return new MonotoneX(context);
	}

	function monotoneY(context) {
	  return new MonotoneY(context);
	}

	function Natural(context) {
	  this._context = context;
	}

	Natural.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x = [];
	    this._y = [];
	  },
	  lineEnd: function () {
	    var x = this._x,
	        y = this._y,
	        n = x.length;

	    if (n) {
	      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
	      if (n === 2) {
	        this._context.lineTo(x[1], y[1]);
	      } else {
	        var px = controlPoints(x),
	            py = controlPoints(y);
	        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
	          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
	        }
	      }
	    }

	    if (this._line || this._line !== 0 && n === 1) this._context.closePath();
	    this._line = 1 - this._line;
	    this._x = this._y = null;
	  },
	  point: function (x, y) {
	    this._x.push(+x);
	    this._y.push(+y);
	  }
	};

	// See https://www.particleincell.com/2012/bezier-splines/ for derivation.
	function controlPoints(x) {
	  var i,
	      n = x.length - 1,
	      m,
	      a = new Array(n),
	      b = new Array(n),
	      r = new Array(n);
	  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
	  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
	  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
	  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
	  a[n - 1] = r[n - 1] / b[n - 1];
	  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
	  b[n - 1] = (x[n] + a[n - 1]) / 2;
	  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
	  return [a, b];
	}

	function curveNatural (context) {
	  return new Natural(context);
	}

	function Step(context, t) {
	  this._context = context;
	  this._t = t;
	}

	Step.prototype = {
	  areaStart: function () {
	    this._line = 0;
	  },
	  areaEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._x = this._y = NaN;
	    this._point = 0;
	  },
	  lineEnd: function () {
	    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
	    if (this._line || this._line !== 0 && this._point === 1) this._context.closePath();
	    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
	  },
	  point: function (x, y) {
	    x = +x, y = +y;
	    switch (this._point) {
	      case 0:
	        this._point = 1;this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);break;
	      case 1:
	        this._point = 2; // proceed
	      default:
	        {
	          if (this._t <= 0) {
	            this._context.lineTo(this._x, y);
	            this._context.lineTo(x, y);
	          } else {
	            var x1 = this._x * (1 - this._t) + x * this._t;
	            this._context.lineTo(x1, this._y);
	            this._context.lineTo(x1, y);
	          }
	          break;
	        }
	    }
	    this._x = x, this._y = y;
	  }
	};

	function curveStep (context) {
	  return new Step(context, 0.5);
	}

	function stepBefore(context) {
	  return new Step(context, 0);
	}

	function stepAfter(context) {
	  return new Step(context, 1);
	}

	var slice$2 = Array.prototype.slice;

	function none (series, order) {
	  if (!((n = series.length) > 1)) return;
	  for (var i = 1, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
	    s0 = s1, s1 = series[order[i]];
	    for (var j = 0; j < m; ++j) {
	      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
	    }
	  }
	}

	function none$1 (series) {
	  var n = series.length,
	      o = new Array(n);
	  while (--n >= 0) o[n] = n;
	  return o;
	}

	function stackValue(d, key) {
	  return d[key];
	}

	function stack () {
	  var keys = constant$1([]),
	      order = none$1,
	      offset = none,
	      value = stackValue;

	  function stack(data) {
	    var kz = keys.apply(this, arguments),
	        i,
	        m = data.length,
	        n = kz.length,
	        sz = new Array(n),
	        oz;

	    for (i = 0; i < n; ++i) {
	      for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
	        si[j] = sij = [0, +value(data[j], ki, j, data)];
	        sij.data = data[j];
	      }
	      si.key = ki;
	    }

	    for (i = 0, oz = order(sz); i < n; ++i) {
	      sz[oz[i]].index = i;
	    }

	    offset(sz, oz);
	    return sz;
	  }

	  stack.keys = function (_) {
	    return arguments.length ? (keys = typeof _ === "function" ? _ : constant$1(slice$2.call(_)), stack) : keys;
	  };

	  stack.value = function (_) {
	    return arguments.length ? (value = typeof _ === "function" ? _ : constant$1(+_), stack) : value;
	  };

	  stack.order = function (_) {
	    return arguments.length ? (order = _ == null ? none$1 : typeof _ === "function" ? _ : constant$1(slice$2.call(_)), stack) : order;
	  };

	  stack.offset = function (_) {
	    return arguments.length ? (offset = _ == null ? none : _, stack) : offset;
	  };

	  return stack;
	}

	function stackOffsetExpand (series, order) {
	  if (!((n = series.length) > 0)) return;
	  for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
	    for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
	    if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
	  }
	  none(series, order);
	}

	function stackOffsetSilhouette (series, order) {
	  if (!((n = series.length) > 0)) return;
	  for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
	    for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
	    s0[j][1] += s0[j][0] = -y / 2;
	  }
	  none(series, order);
	}

	function stackOffsetWiggle (series, order) {
	  if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
	  for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
	    for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
	      var si = series[order[i]],
	          sij0 = si[j][1] || 0,
	          sij1 = si[j - 1][1] || 0,
	          s3 = (sij0 - sij1) / 2;
	      for (var k = 0; k < i; ++k) {
	        var sk = series[order[k]],
	            skj0 = sk[j][1] || 0,
	            skj1 = sk[j - 1][1] || 0;
	        s3 += skj0 - skj1;
	      }
	      s1 += sij0, s2 += s3 * sij0;
	    }
	    s0[j - 1][1] += s0[j - 1][0] = y;
	    if (s1) y -= s2 / s1;
	  }
	  s0[j - 1][1] += s0[j - 1][0] = y;
	  none(series, order);
	}

	function ascending$1 (series) {
	  var sums = series.map(sum$1);
	  return none$1(series).sort(function (a, b) {
	    return sums[a] - sums[b];
	  });
	}

	function sum$1(series) {
	  var s = 0,
	      i = -1,
	      n = series.length,
	      v;
	  while (++i < n) if (v = +series[i][1]) s += v;
	  return s;
	}

	function stackOrderDescending (series) {
	  return ascending$1(series).reverse();
	}

	function stackOrderInsideOut (series) {
	  var n = series.length,
	      i,
	      j,
	      sums = series.map(sum$1),
	      order = none$1(series).sort(function (a, b) {
	    return sums[b] - sums[a];
	  }),
	      top = 0,
	      bottom = 0,
	      tops = [],
	      bottoms = [];

	  for (i = 0; i < n; ++i) {
	    j = order[i];
	    if (top < bottom) {
	      top += sums[j];
	      tops.push(j);
	    } else {
	      bottom += sums[j];
	      bottoms.push(j);
	    }
	  }

	  return bottoms.reverse().concat(tops);
	}

	function stackOrderReverse (series) {
	  return none$1(series).reverse();
	}

	function define$1 (constructor, factory, prototype) {
	  constructor.prototype = factory.prototype = prototype;
	  prototype.constructor = constructor;
	}

	function extend(parent, definition) {
	  var prototype = Object.create(parent.prototype);
	  for (var key in definition) prototype[key] = definition[key];
	  return prototype;
	}

	function Color() {}

	var darker = 0.7;
	var brighter = 1 / darker;

	var reHex3 = /^#([0-9a-f]{3})$/;
	var reHex6 = /^#([0-9a-f]{6})$/;
	var reRgbInteger = /^rgb\(\s*([-+]?\d+)\s*,\s*([-+]?\d+)\s*,\s*([-+]?\d+)\s*\)$/;
	var reRgbPercent = /^rgb\(\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*\)$/;
	var reRgbaInteger = /^rgba\(\s*([-+]?\d+)\s*,\s*([-+]?\d+)\s*,\s*([-+]?\d+)\s*,\s*([-+]?\d+(?:\.\d+)?)\s*\)$/;
	var reRgbaPercent = /^rgba\(\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)\s*\)$/;
	var reHslPercent = /^hsl\(\s*([-+]?\d+(?:\.\d+)?)\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*\)$/;
	var reHslaPercent = /^hsla\(\s*([-+]?\d+(?:\.\d+)?)\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)\s*\)$/;
	var named = {
	  aliceblue: 0xf0f8ff,
	  antiquewhite: 0xfaebd7,
	  aqua: 0x00ffff,
	  aquamarine: 0x7fffd4,
	  azure: 0xf0ffff,
	  beige: 0xf5f5dc,
	  bisque: 0xffe4c4,
	  black: 0x000000,
	  blanchedalmond: 0xffebcd,
	  blue: 0x0000ff,
	  blueviolet: 0x8a2be2,
	  brown: 0xa52a2a,
	  burlywood: 0xdeb887,
	  cadetblue: 0x5f9ea0,
	  chartreuse: 0x7fff00,
	  chocolate: 0xd2691e,
	  coral: 0xff7f50,
	  cornflowerblue: 0x6495ed,
	  cornsilk: 0xfff8dc,
	  crimson: 0xdc143c,
	  cyan: 0x00ffff,
	  darkblue: 0x00008b,
	  darkcyan: 0x008b8b,
	  darkgoldenrod: 0xb8860b,
	  darkgray: 0xa9a9a9,
	  darkgreen: 0x006400,
	  darkgrey: 0xa9a9a9,
	  darkkhaki: 0xbdb76b,
	  darkmagenta: 0x8b008b,
	  darkolivegreen: 0x556b2f,
	  darkorange: 0xff8c00,
	  darkorchid: 0x9932cc,
	  darkred: 0x8b0000,
	  darksalmon: 0xe9967a,
	  darkseagreen: 0x8fbc8f,
	  darkslateblue: 0x483d8b,
	  darkslategray: 0x2f4f4f,
	  darkslategrey: 0x2f4f4f,
	  darkturquoise: 0x00ced1,
	  darkviolet: 0x9400d3,
	  deeppink: 0xff1493,
	  deepskyblue: 0x00bfff,
	  dimgray: 0x696969,
	  dimgrey: 0x696969,
	  dodgerblue: 0x1e90ff,
	  firebrick: 0xb22222,
	  floralwhite: 0xfffaf0,
	  forestgreen: 0x228b22,
	  fuchsia: 0xff00ff,
	  gainsboro: 0xdcdcdc,
	  ghostwhite: 0xf8f8ff,
	  gold: 0xffd700,
	  goldenrod: 0xdaa520,
	  gray: 0x808080,
	  green: 0x008000,
	  greenyellow: 0xadff2f,
	  grey: 0x808080,
	  honeydew: 0xf0fff0,
	  hotpink: 0xff69b4,
	  indianred: 0xcd5c5c,
	  indigo: 0x4b0082,
	  ivory: 0xfffff0,
	  khaki: 0xf0e68c,
	  lavender: 0xe6e6fa,
	  lavenderblush: 0xfff0f5,
	  lawngreen: 0x7cfc00,
	  lemonchiffon: 0xfffacd,
	  lightblue: 0xadd8e6,
	  lightcoral: 0xf08080,
	  lightcyan: 0xe0ffff,
	  lightgoldenrodyellow: 0xfafad2,
	  lightgray: 0xd3d3d3,
	  lightgreen: 0x90ee90,
	  lightgrey: 0xd3d3d3,
	  lightpink: 0xffb6c1,
	  lightsalmon: 0xffa07a,
	  lightseagreen: 0x20b2aa,
	  lightskyblue: 0x87cefa,
	  lightslategray: 0x778899,
	  lightslategrey: 0x778899,
	  lightsteelblue: 0xb0c4de,
	  lightyellow: 0xffffe0,
	  lime: 0x00ff00,
	  limegreen: 0x32cd32,
	  linen: 0xfaf0e6,
	  magenta: 0xff00ff,
	  maroon: 0x800000,
	  mediumaquamarine: 0x66cdaa,
	  mediumblue: 0x0000cd,
	  mediumorchid: 0xba55d3,
	  mediumpurple: 0x9370db,
	  mediumseagreen: 0x3cb371,
	  mediumslateblue: 0x7b68ee,
	  mediumspringgreen: 0x00fa9a,
	  mediumturquoise: 0x48d1cc,
	  mediumvioletred: 0xc71585,
	  midnightblue: 0x191970,
	  mintcream: 0xf5fffa,
	  mistyrose: 0xffe4e1,
	  moccasin: 0xffe4b5,
	  navajowhite: 0xffdead,
	  navy: 0x000080,
	  oldlace: 0xfdf5e6,
	  olive: 0x808000,
	  olivedrab: 0x6b8e23,
	  orange: 0xffa500,
	  orangered: 0xff4500,
	  orchid: 0xda70d6,
	  palegoldenrod: 0xeee8aa,
	  palegreen: 0x98fb98,
	  paleturquoise: 0xafeeee,
	  palevioletred: 0xdb7093,
	  papayawhip: 0xffefd5,
	  peachpuff: 0xffdab9,
	  peru: 0xcd853f,
	  pink: 0xffc0cb,
	  plum: 0xdda0dd,
	  powderblue: 0xb0e0e6,
	  purple: 0x800080,
	  rebeccapurple: 0x663399,
	  red: 0xff0000,
	  rosybrown: 0xbc8f8f,
	  royalblue: 0x4169e1,
	  saddlebrown: 0x8b4513,
	  salmon: 0xfa8072,
	  sandybrown: 0xf4a460,
	  seagreen: 0x2e8b57,
	  seashell: 0xfff5ee,
	  sienna: 0xa0522d,
	  silver: 0xc0c0c0,
	  skyblue: 0x87ceeb,
	  slateblue: 0x6a5acd,
	  slategray: 0x708090,
	  slategrey: 0x708090,
	  snow: 0xfffafa,
	  springgreen: 0x00ff7f,
	  steelblue: 0x4682b4,
	  tan: 0xd2b48c,
	  teal: 0x008080,
	  thistle: 0xd8bfd8,
	  tomato: 0xff6347,
	  turquoise: 0x40e0d0,
	  violet: 0xee82ee,
	  wheat: 0xf5deb3,
	  white: 0xffffff,
	  whitesmoke: 0xf5f5f5,
	  yellow: 0xffff00,
	  yellowgreen: 0x9acd32
	};

	define$1(Color, color, {
	  displayable: function () {
	    return this.rgb().displayable();
	  },
	  toString: function () {
	    return this.rgb() + "";
	  }
	});

	function color(format) {
	  var m;
	  format = (format + "").trim().toLowerCase();
	  return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb(m >> 8 & 0xf | m >> 4 & 0x0f0, m >> 4 & 0xf | m & 0xf0, (m & 0xf) << 4 | m & 0xf, 1) // #f00
	  ) : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
	  : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
	  : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
	  : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
	  : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
	  : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
	  : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
	  : named.hasOwnProperty(format) ? rgbn(named[format]) : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) : null;
	}

	function rgbn(n) {
	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
	}

	function rgba(r, g, b, a) {
	  if (a <= 0) r = g = b = NaN;
	  return new Rgb(r, g, b, a);
	}

	function rgbConvert(o) {
	  if (!(o instanceof Color)) o = color(o);
	  if (!o) return new Rgb();
	  o = o.rgb();
	  return new Rgb(o.r, o.g, o.b, o.opacity);
	}

	function colorRgb(r, g, b, opacity) {
	  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
	}

	function Rgb(r, g, b, opacity) {
	  this.r = +r;
	  this.g = +g;
	  this.b = +b;
	  this.opacity = +opacity;
	}

	define$1(Rgb, colorRgb, extend(Color, {
	  brighter: function (k) {
	    k = k == null ? brighter : Math.pow(brighter, k);
	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
	  },
	  darker: function (k) {
	    k = k == null ? darker : Math.pow(darker, k);
	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
	  },
	  rgb: function () {
	    return this;
	  },
	  displayable: function () {
	    return 0 <= this.r && this.r <= 255 && 0 <= this.g && this.g <= 255 && 0 <= this.b && this.b <= 255 && 0 <= this.opacity && this.opacity <= 1;
	  },
	  toString: function () {
	    var a = this.opacity;a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
	    return (a === 1 ? "rgb(" : "rgba(") + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.b) || 0)) + (a === 1 ? ")" : ", " + a + ")");
	  }
	}));

	function hsla(h, s, l, a) {
	  if (a <= 0) h = s = l = NaN;else if (l <= 0 || l >= 1) h = s = NaN;else if (s <= 0) h = NaN;
	  return new Hsl(h, s, l, a);
	}

	function hslConvert(o) {
	  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
	  if (!(o instanceof Color)) o = color(o);
	  if (!o) return new Hsl();
	  if (o instanceof Hsl) return o;
	  o = o.rgb();
	  var r = o.r / 255,
	      g = o.g / 255,
	      b = o.b / 255,
	      min = Math.min(r, g, b),
	      max = Math.max(r, g, b),
	      h = NaN,
	      s = max - min,
	      l = (max + min) / 2;
	  if (s) {
	    if (r === max) h = (g - b) / s + (g < b) * 6;else if (g === max) h = (b - r) / s + 2;else h = (r - g) / s + 4;
	    s /= l < 0.5 ? max + min : 2 - max - min;
	    h *= 60;
	  } else {
	    s = l > 0 && l < 1 ? 0 : h;
	  }
	  return new Hsl(h, s, l, o.opacity);
	}

	function colorHsl(h, s, l, opacity) {
	  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
	}

	function Hsl(h, s, l, opacity) {
	  this.h = +h;
	  this.s = +s;
	  this.l = +l;
	  this.opacity = +opacity;
	}

	define$1(Hsl, colorHsl, extend(Color, {
	  brighter: function (k) {
	    k = k == null ? brighter : Math.pow(brighter, k);
	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
	  },
	  darker: function (k) {
	    k = k == null ? darker : Math.pow(darker, k);
	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
	  },
	  rgb: function () {
	    var h = this.h % 360 + (this.h < 0) * 360,
	        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
	        l = this.l,
	        m2 = l + (l < 0.5 ? l : 1 - l) * s,
	        m1 = 2 * l - m2;
	    return new Rgb(hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2), hsl2rgb(h, m1, m2), hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2), this.opacity);
	  },
	  displayable: function () {
	    return (0 <= this.s && this.s <= 1 || isNaN(this.s)) && 0 <= this.l && this.l <= 1 && 0 <= this.opacity && this.opacity <= 1;
	  }
	}));

	/* From FvD 13.37, CSS Color Module Level 3 */
	function hsl2rgb(h, m1, m2) {
	  return (h < 60 ? m1 + (m2 - m1) * h / 60 : h < 180 ? m2 : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 : m1) * 255;
	}

	var deg2rad = Math.PI / 180;
	var rad2deg = 180 / Math.PI;

	var Kn = 18;
	var Xn = 0.950470;
	var Yn = 1;
	var Zn = 1.088830;
	var t0 = 4 / 29;
	var t1 = 6 / 29;
	var t2 = 3 * t1 * t1;
	var t3 = t1 * t1 * t1;
	function labConvert(o) {
	  if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
	  if (o instanceof Hcl) {
	    var h = o.h * deg2rad;
	    return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
	  }
	  if (!(o instanceof Rgb)) o = rgbConvert(o);
	  var b = rgb2xyz(o.r),
	      a = rgb2xyz(o.g),
	      l = rgb2xyz(o.b),
	      x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
	      y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
	      z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
	  return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
	}

	function lab(l, a, b, opacity) {
	  return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
	}

	function Lab(l, a, b, opacity) {
	  this.l = +l;
	  this.a = +a;
	  this.b = +b;
	  this.opacity = +opacity;
	}

	define$1(Lab, lab, extend(Color, {
	  brighter: function (k) {
	    return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
	  },
	  darker: function (k) {
	    return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
	  },
	  rgb: function () {
	    var y = (this.l + 16) / 116,
	        x = isNaN(this.a) ? y : y + this.a / 500,
	        z = isNaN(this.b) ? y : y - this.b / 200;
	    y = Yn * lab2xyz(y);
	    x = Xn * lab2xyz(x);
	    z = Zn * lab2xyz(z);
	    return new Rgb(xyz2rgb(3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
	    xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z), xyz2rgb(0.0556434 * x - 0.2040259 * y + 1.0572252 * z), this.opacity);
	  }
	}));

	function xyz2lab(t) {
	  return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
	}

	function lab2xyz(t) {
	  return t > t1 ? t * t * t : t2 * (t - t0);
	}

	function xyz2rgb(x) {
	  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
	}

	function rgb2xyz(x) {
	  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
	}

	function hclConvert(o) {
	  if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
	  if (!(o instanceof Lab)) o = labConvert(o);
	  var h = Math.atan2(o.b, o.a) * rad2deg;
	  return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
	}

	function colorHcl(h, c, l, opacity) {
	  return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
	}

	function Hcl(h, c, l, opacity) {
	  this.h = +h;
	  this.c = +c;
	  this.l = +l;
	  this.opacity = +opacity;
	}

	define$1(Hcl, colorHcl, extend(Color, {
	  brighter: function (k) {
	    return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
	  },
	  darker: function (k) {
	    return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
	  },
	  rgb: function () {
	    return labConvert(this).rgb();
	  }
	}));

	var A = -0.14861;
	var B = +1.78277;
	var C = -0.29227;
	var D = -0.90649;
	var E = +1.97294;
	var ED = E * D;
	var EB = E * B;
	var BC_DA = B * C - D * A;
	function cubehelixConvert(o) {
	  if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
	  if (!(o instanceof Rgb)) o = rgbConvert(o);
	  var r = o.r / 255,
	      g = o.g / 255,
	      b = o.b / 255,
	      l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
	      bl = b - l,
	      k = (E * (g - l) - C * bl) / D,
	      s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)),
	      // NaN if l=0 or l=1
	  h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
	  return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
	}

	function cubehelix(h, s, l, opacity) {
	  return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
	}

	function Cubehelix(h, s, l, opacity) {
	  this.h = +h;
	  this.s = +s;
	  this.l = +l;
	  this.opacity = +opacity;
	}

	define$1(Cubehelix, cubehelix, extend(Color, {
	  brighter: function (k) {
	    k = k == null ? brighter : Math.pow(brighter, k);
	    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
	  },
	  darker: function (k) {
	    k = k == null ? darker : Math.pow(darker, k);
	    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
	  },
	  rgb: function () {
	    var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
	        l = +this.l,
	        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
	        cosh = Math.cos(h),
	        sinh = Math.sin(h);
	    return new Rgb(255 * (l + a * (A * cosh + B * sinh)), 255 * (l + a * (C * cosh + D * sinh)), 255 * (l + a * (E * cosh)), this.opacity);
	  }
	}));

	function basis(t1, v0, v1, v2, v3) {
	  var t2 = t1 * t1,
	      t3 = t2 * t1;
	  return ((1 - 3 * t1 + 3 * t2 - t3) * v0 + (4 - 6 * t2 + 3 * t3) * v1 + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2 + t3 * v3) / 6;
	}

	function basis$1 (values) {
	  var n = values.length - 1;
	  return function (t) {
	    var i = t <= 0 ? t = 0 : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
	        v1 = values[i],
	        v2 = values[i + 1],
	        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
	        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
	    return basis((t - i / n) * n, v0, v1, v2, v3);
	  };
	}

	function basisClosed (values) {
	  var n = values.length;
	  return function (t) {
	    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
	        v0 = values[(i + n - 1) % n],
	        v1 = values[i % n],
	        v2 = values[(i + 1) % n],
	        v3 = values[(i + 2) % n];
	    return basis((t - i / n) * n, v0, v1, v2, v3);
	  };
	}

	function constant$2 (x) {
	  return function () {
	    return x;
	  };
	}

	function linear$1(a, d) {
	  return function (t) {
	    return a + t * d;
	  };
	}

	function exponential(a, b, y) {
	  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function (t) {
	    return Math.pow(a + t * b, y);
	  };
	}

	function hue(a, b) {
	  var d = b - a;
	  return d ? linear$1(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$2(isNaN(a) ? b : a);
	}

	function gamma(y) {
	  return (y = +y) === 1 ? nogamma : function (a, b) {
	    return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
	  };
	}

	function nogamma(a, b) {
	  var d = b - a;
	  return d ? linear$1(a, d) : constant$2(isNaN(a) ? b : a);
	}

	var interpolateRgb = (function rgbGamma(y) {
	  var color = gamma(y);

	  function rgb(start, end) {
	    var r = color((start = colorRgb(start)).r, (end = colorRgb(end)).r),
	        g = color(start.g, end.g),
	        b = color(start.b, end.b),
	        opacity = color(start.opacity, end.opacity);
	    return function (t) {
	      start.r = r(t);
	      start.g = g(t);
	      start.b = b(t);
	      start.opacity = opacity(t);
	      return start + "";
	    };
	  }

	  rgb.gamma = rgbGamma;

	  return rgb;
	})(1);

	function rgbSpline(spline) {
	  return function (colors) {
	    var n = colors.length,
	        r = new Array(n),
	        g = new Array(n),
	        b = new Array(n),
	        i,
	        color;
	    for (i = 0; i < n; ++i) {
	      color = colorRgb(colors[i]);
	      r[i] = color.r || 0;
	      g[i] = color.g || 0;
	      b[i] = color.b || 0;
	    }
	    r = spline(r);
	    g = spline(g);
	    b = spline(b);
	    color.opacity = 1;
	    return function (t) {
	      color.r = r(t);
	      color.g = g(t);
	      color.b = b(t);
	      return color + "";
	    };
	  };
	}

	var rgbBasis = rgbSpline(basis$1);
	var rgbBasisClosed = rgbSpline(basisClosed);

	function array$1 (a, b) {
	  var nb = b ? b.length : 0,
	      na = a ? Math.min(nb, a.length) : 0,
	      x = new Array(nb),
	      c = new Array(nb),
	      i;

	  for (i = 0; i < na; ++i) x[i] = interpolate(a[i], b[i]);
	  for (; i < nb; ++i) c[i] = b[i];

	  return function (t) {
	    for (i = 0; i < na; ++i) c[i] = x[i](t);
	    return c;
	  };
	}

	function date (a, b) {
	  var d = new Date();
	  return a = +a, b -= a, function (t) {
	    return d.setTime(a + b * t), d;
	  };
	}

	function interpolateNumber (a, b) {
	  return a = +a, b -= a, function (t) {
	    return a + b * t;
	  };
	}

	function object (a, b) {
	  var i = {},
	      c = {},
	      k;

	  if (a === null || typeof a !== "object") a = {};
	  if (b === null || typeof b !== "object") b = {};

	  for (k in b) {
	    if (k in a) {
	      i[k] = interpolate(a[k], b[k]);
	    } else {
	      c[k] = b[k];
	    }
	  }

	  return function (t) {
	    for (k in i) c[k] = i[k](t);
	    return c;
	  };
	}

	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
	var reB = new RegExp(reA.source, "g");
	function zero(b) {
	  return function () {
	    return b;
	  };
	}

	function one(b) {
	  return function (t) {
	    return b(t) + "";
	  };
	}

	function interpolateString (a, b) {
	  var bi = reA.lastIndex = reB.lastIndex = 0,
	      // scan index for next number in b
	  am,
	      // current match in a
	  bm,
	      // current match in b
	  bs,
	      // string preceding current number in b, if any
	  i = -1,
	      // index in s
	  s = [],
	      // string constants and placeholders
	  q = []; // number interpolators

	  // Coerce inputs to strings.
	  a = a + "", b = b + "";

	  // Interpolate pairs of numbers in a & b.
	  while ((am = reA.exec(a)) && (bm = reB.exec(b))) {
	    if ((bs = bm.index) > bi) {
	      // a string precedes the next number in b
	      bs = b.slice(bi, bs);
	      if (s[i]) s[i] += bs; // coalesce with previous string
	      else s[++i] = bs;
	    }
	    if ((am = am[0]) === (bm = bm[0])) {
	      // numbers in a & b match
	      if (s[i]) s[i] += bm; // coalesce with previous string
	      else s[++i] = bm;
	    } else {
	      // interpolate non-matching numbers
	      s[++i] = null;
	      q.push({ i: i, x: interpolateNumber(am, bm) });
	    }
	    bi = reB.lastIndex;
	  }

	  // Add remains of b.
	  if (bi < b.length) {
	    bs = b.slice(bi);
	    if (s[i]) s[i] += bs; // coalesce with previous string
	    else s[++i] = bs;
	  }

	  // Special optimization for only a single match.
	  // Otherwise, interpolate each of the numbers and rejoin the string.
	  return s.length < 2 ? q[0] ? one(q[0].x) : zero(b) : (b = q.length, function (t) {
	    for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
	    return s.join("");
	  });
	}

	function interpolate (a, b) {
	    var t = typeof b,
	        c;
	    return b == null || t === "boolean" ? constant$2(b) : (t === "number" ? interpolateNumber : t === "string" ? (c = color(b)) ? (b = c, interpolateRgb) : interpolateString : b instanceof color ? interpolateRgb : b instanceof Date ? date : Array.isArray(b) ? array$1 : isNaN(b) ? object : interpolateNumber)(a, b);
	}

	function interpolateRound (a, b) {
	  return a = +a, b -= a, function (t) {
	    return Math.round(a + b * t);
	  };
	}

	var degrees = 180 / Math.PI;

	var identity$2 = {
	  translateX: 0,
	  translateY: 0,
	  rotate: 0,
	  skewX: 0,
	  scaleX: 1,
	  scaleY: 1
	};

	function decompose (a, b, c, d, e, f) {
	  var scaleX, scaleY, skewX;
	  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
	  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
	  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
	  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
	  return {
	    translateX: e,
	    translateY: f,
	    rotate: Math.atan2(b, a) * degrees,
	    skewX: Math.atan(skewX) * degrees,
	    scaleX: scaleX,
	    scaleY: scaleY
	  };
	}

	var cssNode;
	var cssRoot;
	var cssView;
	var svgNode;
	function parseCss(value) {
	  if (value === "none") return identity$2;
	  if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
	  cssNode.style.transform = value;
	  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
	  cssRoot.removeChild(cssNode);
	  value = value.slice(7, -1).split(",");
	  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
	}

	function parseSvg(value) {
	  if (value == null) return identity$2;
	  if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
	  svgNode.setAttribute("transform", value);
	  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;
	  value = value.matrix;
	  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
	}

	function interpolateTransform(parse, pxComma, pxParen, degParen) {

	  function pop(s) {
	    return s.length ? s.pop() + " " : "";
	  }

	  function translate(xa, ya, xb, yb, s, q) {
	    if (xa !== xb || ya !== yb) {
	      var i = s.push("translate(", null, pxComma, null, pxParen);
	      q.push({ i: i - 4, x: interpolateNumber(xa, xb) }, { i: i - 2, x: interpolateNumber(ya, yb) });
	    } else if (xb || yb) {
	      s.push("translate(" + xb + pxComma + yb + pxParen);
	    }
	  }

	  function rotate(a, b, s, q) {
	    if (a !== b) {
	      if (a - b > 180) b += 360;else if (b - a > 180) a += 360; // shortest path
	      q.push({ i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: interpolateNumber(a, b) });
	    } else if (b) {
	      s.push(pop(s) + "rotate(" + b + degParen);
	    }
	  }

	  function skewX(a, b, s, q) {
	    if (a !== b) {
	      q.push({ i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: interpolateNumber(a, b) });
	    } else if (b) {
	      s.push(pop(s) + "skewX(" + b + degParen);
	    }
	  }

	  function scale(xa, ya, xb, yb, s, q) {
	    if (xa !== xb || ya !== yb) {
	      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
	      q.push({ i: i - 4, x: interpolateNumber(xa, xb) }, { i: i - 2, x: interpolateNumber(ya, yb) });
	    } else if (xb !== 1 || yb !== 1) {
	      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
	    }
	  }

	  return function (a, b) {
	    var s = [],
	        // string constants and placeholders
	    q = []; // number interpolators
	    a = parse(a), b = parse(b);
	    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
	    rotate(a.rotate, b.rotate, s, q);
	    skewX(a.skewX, b.skewX, s, q);
	    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
	    a = b = null; // gc
	    return function (t) {
	      var i = -1,
	          n = q.length,
	          o;
	      while (++i < n) s[(o = q[i]).i] = o.x(t);
	      return s.join("");
	    };
	  };
	}

	var interpolateTransform$1 = interpolateTransform(parseCss, "px, ", "px)", "deg)");
	var interpolateTransform$2 = interpolateTransform(parseSvg, ", ", ")", ")");

	var rho = Math.SQRT2;
	var rho2 = 2;
	var rho4 = 4;
	var epsilon2 = 1e-12;
	function cosh(x) {
	  return ((x = Math.exp(x)) + 1 / x) / 2;
	}

	function sinh(x) {
	  return ((x = Math.exp(x)) - 1 / x) / 2;
	}

	function tanh(x) {
	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
	}

	// p0 = [ux0, uy0, w0]
	// p1 = [ux1, uy1, w1]
	function interpolateZoom (p0, p1) {
	  var ux0 = p0[0],
	      uy0 = p0[1],
	      w0 = p0[2],
	      ux1 = p1[0],
	      uy1 = p1[1],
	      w1 = p1[2],
	      dx = ux1 - ux0,
	      dy = uy1 - uy0,
	      d2 = dx * dx + dy * dy,
	      i,
	      S;

	  // Special case for u0 ≅ u1.
	  if (d2 < epsilon2) {
	    S = Math.log(w1 / w0) / rho;
	    i = function (t) {
	      return [ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(rho * t * S)];
	    };
	  }

	  // General case.
	  else {
	      var d1 = Math.sqrt(d2),
	          b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
	          b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
	          r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
	          r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
	      S = (r1 - r0) / rho;
	      i = function (t) {
	        var s = t * S,
	            coshr0 = cosh(r0),
	            u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
	        return [ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / cosh(rho * s + r0)];
	      };
	    }

	  i.duration = S * 1000;

	  return i;
	}

	function hsl(hue) {
	  return function (start, end) {
	    var h = hue((start = colorHsl(start)).h, (end = colorHsl(end)).h),
	        s = nogamma(start.s, end.s),
	        l = nogamma(start.l, end.l),
	        opacity = nogamma(start.opacity, end.opacity);
	    return function (t) {
	      start.h = h(t);
	      start.s = s(t);
	      start.l = l(t);
	      start.opacity = opacity(t);
	      return start + "";
	    };
	  };
	}

	var interpolateHsl = hsl(hue);
	var hslLong = hsl(nogamma);

	function lab$1(start, end) {
	  var l = nogamma((start = lab(start)).l, (end = lab(end)).l),
	      a = nogamma(start.a, end.a),
	      b = nogamma(start.b, end.b),
	      opacity = nogamma(start.opacity, end.opacity);
	  return function (t) {
	    start.l = l(t);
	    start.a = a(t);
	    start.b = b(t);
	    start.opacity = opacity(t);
	    return start + "";
	  };
	}

	function hcl(hue) {
	  return function (start, end) {
	    var h = hue((start = colorHcl(start)).h, (end = colorHcl(end)).h),
	        c = nogamma(start.c, end.c),
	        l = nogamma(start.l, end.l),
	        opacity = nogamma(start.opacity, end.opacity);
	    return function (t) {
	      start.h = h(t);
	      start.c = c(t);
	      start.l = l(t);
	      start.opacity = opacity(t);
	      return start + "";
	    };
	  };
	}

	var interpolateHcl = hcl(hue);
	var hclLong = hcl(nogamma);

	function cubehelix$1(hue) {
	  return function cubehelixGamma(y) {
	    y = +y;

	    function cubehelix$$(start, end) {
	      var h = hue((start = cubehelix(start)).h, (end = cubehelix(end)).h),
	          s = nogamma(start.s, end.s),
	          l = nogamma(start.l, end.l),
	          opacity = nogamma(start.opacity, end.opacity);
	      return function (t) {
	        start.h = h(t);
	        start.s = s(t);
	        start.l = l(Math.pow(t, y));
	        start.opacity = opacity(t);
	        return start + "";
	      };
	    }

	    cubehelix$$.gamma = cubehelixGamma;

	    return cubehelix$$;
	  }(1);
	}

	var interpolateCubehelix = cubehelix$1(hue);
	var interpolateCubehelixLong = cubehelix$1(nogamma);

	function quantize (interpolator, n) {
	  var samples = new Array(n);
	  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
	  return samples;
	}

	var noop$1 = { value: function () {} };

	function dispatch() {
	  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
	    if (!(t = arguments[i] + "") || t in _) throw new Error("illegal type: " + t);
	    _[t] = [];
	  }
	  return new Dispatch(_);
	}

	function Dispatch(_) {
	  this._ = _;
	}

	function parseTypenames(typenames, types) {
	  return typenames.trim().split(/^|\s+/).map(function (t) {
	    var name = "",
	        i = t.indexOf(".");
	    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
	    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
	    return { type: t, name: name };
	  });
	}

	Dispatch.prototype = dispatch.prototype = {
	  constructor: Dispatch,
	  on: function (typename, callback) {
	    var _ = this._,
	        T = parseTypenames(typename + "", _),
	        t,
	        i = -1,
	        n = T.length;

	    // If no callback was specified, return the callback of the given type and name.
	    if (arguments.length < 2) {
	      while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
	      return;
	    }

	    // If a type was specified, set the callback for the given type and name.
	    // Otherwise, if a null callback was specified, remove callbacks of the given name.
	    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
	    while (++i < n) {
	      if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);else if (callback == null) for (t in _) _[t] = set$1(_[t], typename.name, null);
	    }

	    return this;
	  },
	  copy: function () {
	    var copy = {},
	        _ = this._;
	    for (var t in _) copy[t] = _[t].slice();
	    return new Dispatch(copy);
	  },
	  call: function (type, that) {
	    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
	    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
	    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
	  },
	  apply: function (type, that, args) {
	    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
	  }
	};

	function get(type, name) {
	  for (var i = 0, n = type.length, c; i < n; ++i) {
	    if ((c = type[i]).name === name) {
	      return c.value;
	    }
	  }
	}

	function set$1(type, name, callback) {
	  for (var i = 0, n = type.length; i < n; ++i) {
	    if (type[i].name === name) {
	      type[i] = noop$1, type = type.slice(0, i).concat(type.slice(i + 1));
	      break;
	    }
	  }
	  if (callback != null) type.push({ name: name, value: callback });
	  return type;
	}

	function objectConverter(columns) {
	  return new Function("d", "return {" + columns.map(function (name, i) {
	    return JSON.stringify(name) + ": d[" + i + "]";
	  }).join(",") + "}");
	}

	function customConverter(columns, f) {
	  var object = objectConverter(columns);
	  return function (row, i) {
	    return f(object(row), i, columns);
	  };
	}

	// Compute unique columns in order of discovery.
	function inferColumns(rows) {
	  var columnSet = Object.create(null),
	      columns = [];

	  rows.forEach(function (row) {
	    for (var column in row) {
	      if (!(column in columnSet)) {
	        columns.push(columnSet[column] = column);
	      }
	    }
	  });

	  return columns;
	}

	function dsv (delimiter) {
	  var reFormat = new RegExp("[\"" + delimiter + "\n]"),
	      delimiterCode = delimiter.charCodeAt(0);

	  function parse(text, f) {
	    var convert,
	        columns,
	        rows = parseRows(text, function (row, i) {
	      if (convert) return convert(row, i - 1);
	      columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
	    });
	    rows.columns = columns;
	    return rows;
	  }

	  function parseRows(text, f) {
	    var EOL = {},
	        // sentinel value for end-of-line
	    EOF = {},
	        // sentinel value for end-of-file
	    rows = [],
	        // output rows
	    N = text.length,
	        I = 0,
	        // current character index
	    n = 0,
	        // the current line number
	    t,
	        // the current token
	    eol; // is the current token followed by EOL?

	    function token() {
	      if (I >= N) return EOF; // special case: end of file
	      if (eol) return eol = false, EOL; // special case: end of line

	      // special case: quotes
	      var j = I,
	          c;
	      if (text.charCodeAt(j) === 34) {
	        var i = j;
	        while (i++ < N) {
	          if (text.charCodeAt(i) === 34) {
	            if (text.charCodeAt(i + 1) !== 34) break;
	            ++i;
	          }
	        }
	        I = i + 2;
	        c = text.charCodeAt(i + 1);
	        if (c === 13) {
	          eol = true;
	          if (text.charCodeAt(i + 2) === 10) ++I;
	        } else if (c === 10) {
	          eol = true;
	        }
	        return text.slice(j + 1, i).replace(/""/g, "\"");
	      }

	      // common case: find next delimiter or newline
	      while (I < N) {
	        var k = 1;
	        c = text.charCodeAt(I++);
	        if (c === 10) eol = true; // \n
	        else if (c === 13) {
	            eol = true;if (text.charCodeAt(I) === 10) ++I, ++k;
	          } // \r|\r\n
	          else if (c !== delimiterCode) continue;
	        return text.slice(j, I - k);
	      }

	      // special case: last token before EOF
	      return text.slice(j);
	    }

	    while ((t = token()) !== EOF) {
	      var a = [];
	      while (t !== EOL && t !== EOF) {
	        a.push(t);
	        t = token();
	      }
	      if (f && (a = f(a, n++)) == null) continue;
	      rows.push(a);
	    }

	    return rows;
	  }

	  function format(rows, columns) {
	    if (columns == null) columns = inferColumns(rows);
	    return [columns.map(formatValue).join(delimiter)].concat(rows.map(function (row) {
	      return columns.map(function (column) {
	        return formatValue(row[column]);
	      }).join(delimiter);
	    })).join("\n");
	  }

	  function formatRows(rows) {
	    return rows.map(formatRow).join("\n");
	  }

	  function formatRow(row) {
	    return row.map(formatValue).join(delimiter);
	  }

	  function formatValue(text) {
	    return text == null ? "" : reFormat.test(text += "") ? "\"" + text.replace(/\"/g, "\"\"") + "\"" : text;
	  }

	  return {
	    parse: parse,
	    parseRows: parseRows,
	    format: format,
	    formatRows: formatRows
	  };
	}

	var csv = dsv(",");

	var csvParse = csv.parse;
	var csvParseRows = csv.parseRows;
	var csvFormat = csv.format;
	var csvFormatRows = csv.formatRows;

	var tsv = dsv("\t");

	var tsvParse = tsv.parse;
	var tsvParseRows = tsv.parseRows;
	var tsvFormat = tsv.format;
	var tsvFormatRows = tsv.formatRows;

	function request (url, callback) {
	  var request,
	      event = dispatch("beforesend", "progress", "load", "error"),
	      mimeType,
	      headers = map$1(),
	      xhr = new XMLHttpRequest(),
	      user = null,
	      password = null,
	      response,
	      responseType,
	      timeout = 0;

	  // If IE does not support CORS, use XDomainRequest.
	  if (typeof XDomainRequest !== "undefined" && !("withCredentials" in xhr) && /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest();

	  "onload" in xhr ? xhr.onload = xhr.onerror = xhr.ontimeout = respond : xhr.onreadystatechange = function (o) {
	    xhr.readyState > 3 && respond(o);
	  };

	  function respond(o) {
	    var status = xhr.status,
	        result;
	    if (!status && hasResponse(xhr) || status >= 200 && status < 300 || status === 304) {
	      if (response) {
	        try {
	          result = response.call(request, xhr);
	        } catch (e) {
	          event.call("error", request, e);
	          return;
	        }
	      } else {
	        result = xhr;
	      }
	      event.call("load", request, result);
	    } else {
	      event.call("error", request, o);
	    }
	  }

	  xhr.onprogress = function (e) {
	    event.call("progress", request, e);
	  };

	  request = {
	    header: function (name, value) {
	      name = (name + "").toLowerCase();
	      if (arguments.length < 2) return headers.get(name);
	      if (value == null) headers.remove(name);else headers.set(name, value + "");
	      return request;
	    },

	    // If mimeType is non-null and no Accept header is set, a default is used.
	    mimeType: function (value) {
	      if (!arguments.length) return mimeType;
	      mimeType = value == null ? null : value + "";
	      return request;
	    },

	    // Specifies what type the response value should take;
	    // for instance, arraybuffer, blob, document, or text.
	    responseType: function (value) {
	      if (!arguments.length) return responseType;
	      responseType = value;
	      return request;
	    },

	    timeout: function (value) {
	      if (!arguments.length) return timeout;
	      timeout = +value;
	      return request;
	    },

	    user: function (value) {
	      return arguments.length < 1 ? user : (user = value == null ? null : value + "", request);
	    },

	    password: function (value) {
	      return arguments.length < 1 ? password : (password = value == null ? null : value + "", request);
	    },

	    // Specify how to convert the response content to a specific type;
	    // changes the callback value on "load" events.
	    response: function (value) {
	      response = value;
	      return request;
	    },

	    // Alias for send("GET", …).
	    get: function (data, callback) {
	      return request.send("GET", data, callback);
	    },

	    // Alias for send("POST", …).
	    post: function (data, callback) {
	      return request.send("POST", data, callback);
	    },

	    // If callback is non-null, it will be used for error and load events.
	    send: function (method, data, callback) {
	      xhr.open(method, url, true, user, password);
	      if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*");
	      if (xhr.setRequestHeader) headers.each(function (value, name) {
	        xhr.setRequestHeader(name, value);
	      });
	      if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);
	      if (responseType != null) xhr.responseType = responseType;
	      if (timeout > 0) xhr.timeout = timeout;
	      if (callback == null && typeof data === "function") callback = data, data = null;
	      if (callback != null && callback.length === 1) callback = fixCallback(callback);
	      if (callback != null) request.on("error", callback).on("load", function (xhr) {
	        callback(null, xhr);
	      });
	      event.call("beforesend", request, xhr);
	      xhr.send(data == null ? null : data);
	      return request;
	    },

	    abort: function () {
	      xhr.abort();
	      return request;
	    },

	    on: function () {
	      var value = event.on.apply(event, arguments);
	      return value === event ? request : value;
	    }
	  };

	  if (callback != null) {
	    if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
	    return request.get(callback);
	  }

	  return request;
	}

	function fixCallback(callback) {
	  return function (error, xhr) {
	    callback(error == null ? xhr : null);
	  };
	}

	function hasResponse(xhr) {
	  var type = xhr.responseType;
	  return type && type !== "text" ? xhr.response // null on error
	  : xhr.responseText; // "" on error
	}

	function type (defaultMimeType, response) {
	  return function (url, callback) {
	    var r = request(url).mimeType(defaultMimeType).response(response);
	    if (callback != null) {
	      if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
	      return r.get(callback);
	    }
	    return r;
	  };
	}

	var html = type("text/html", function (xhr) {
	  return document.createRange().createContextualFragment(xhr.responseText);
	});

	var json = type("application/json", function (xhr) {
	  return JSON.parse(xhr.responseText);
	});

	var text = type("text/plain", function (xhr) {
	  return xhr.responseText;
	});

	var xml = type("application/xml", function (xhr) {
	  var xml = xhr.responseXML;
	  if (!xml) throw new Error("parse error");
	  return xml;
	});

	function dsv$1 (defaultMimeType, parse) {
	  return function (url, row, callback) {
	    if (arguments.length < 3) callback = row, row = null;
	    var r = request(url).mimeType(defaultMimeType);
	    r.row = function (_) {
	      return arguments.length ? r.response(responseOf(parse, row = _)) : row;
	    };
	    r.row(row);
	    return callback ? r.get(callback) : r;
	  };
	}

	function responseOf(parse, row) {
	  return function (request) {
	    return parse(request.responseText, row);
	  };
	}

	var csv$1 = dsv$1("text/csv", csvParse);

	var tsv$1 = dsv$1("text/tab-separated-values", tsvParse);

	var frame = 0;
	var timeout = 0;
	var interval = 0;
	var pokeDelay = 1000;
	var taskHead;
	var taskTail;
	var clockLast = 0;
	var clockNow = 0;
	var clockSkew = 0;
	var clock = typeof performance === "object" && performance.now ? performance : Date;
	var setFrame = typeof requestAnimationFrame === "function" ? requestAnimationFrame : function (f) {
	  setTimeout(f, 17);
	};
	function now() {
	  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
	}

	function clearNow() {
	  clockNow = 0;
	}

	function Timer() {
	  this._call = this._time = this._next = null;
	}

	Timer.prototype = timer.prototype = {
	  constructor: Timer,
	  restart: function (callback, delay, time) {
	    if (typeof callback !== "function") throw new TypeError("callback is not a function");
	    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
	    if (!this._next && taskTail !== this) {
	      if (taskTail) taskTail._next = this;else taskHead = this;
	      taskTail = this;
	    }
	    this._call = callback;
	    this._time = time;
	    sleep();
	  },
	  stop: function () {
	    if (this._call) {
	      this._call = null;
	      this._time = Infinity;
	      sleep();
	    }
	  }
	};

	function timer(callback, delay, time) {
	  var t = new Timer();
	  t.restart(callback, delay, time);
	  return t;
	}

	function timerFlush() {
	  now(); // Get the current time, if not already set.
	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
	  var t = taskHead,
	      e;
	  while (t) {
	    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
	    t = t._next;
	  }
	  --frame;
	}

	function wake() {
	  clockNow = (clockLast = clock.now()) + clockSkew;
	  frame = timeout = 0;
	  try {
	    timerFlush();
	  } finally {
	    frame = 0;
	    nap();
	    clockNow = 0;
	  }
	}

	function poke$1() {
	  var now = clock.now(),
	      delay = now - clockLast;
	  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
	}

	function nap() {
	  var t0,
	      t1 = taskHead,
	      t2,
	      time = Infinity;
	  while (t1) {
	    if (t1._call) {
	      if (time > t1._time) time = t1._time;
	      t0 = t1, t1 = t1._next;
	    } else {
	      t2 = t1._next, t1._next = null;
	      t1 = t0 ? t0._next = t2 : taskHead = t2;
	    }
	  }
	  taskTail = t0;
	  sleep(time);
	}

	function sleep(time) {
	  if (frame) return; // Soonest alarm already set, or will be.
	  if (timeout) timeout = clearTimeout(timeout);
	  var delay = time - clockNow;
	  if (delay > 24) {
	    if (time < Infinity) timeout = setTimeout(wake, delay);
	    if (interval) interval = clearInterval(interval);
	  } else {
	    if (!interval) interval = setInterval(poke$1, pokeDelay);
	    frame = 1, setFrame(wake);
	  }
	}

	function timeout$1 (callback, delay, time) {
	  var t = new Timer();
	  delay = delay == null ? 0 : +delay;
	  t.restart(function (elapsed) {
	    t.stop();
	    callback(elapsed + delay);
	  }, delay, time);
	  return t;
	}

	function interval$1 (callback, delay, time) {
	  var t = new Timer(),
	      total = delay;
	  if (delay == null) return t.restart(callback, delay, time), t;
	  delay = +delay, time = time == null ? now() : +time;
	  t.restart(function tick(elapsed) {
	    elapsed += total;
	    t.restart(tick, total += delay, time);
	    callback(elapsed);
	  }, delay, time);
	  return t;
	}

var 	t0$1 = new Date();
var 	t1$1 = new Date();
	function newInterval(floori, offseti, count, field) {

	  function interval(date) {
	    return floori(date = new Date(+date)), date;
	  }

	  interval.floor = interval;

	  interval.ceil = function (date) {
	    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
	  };

	  interval.round = function (date) {
	    var d0 = interval(date),
	        d1 = interval.ceil(date);
	    return date - d0 < d1 - date ? d0 : d1;
	  };

	  interval.offset = function (date, step) {
	    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
	  };

	  interval.range = function (start, stop, step) {
	    var range = [];
	    start = interval.ceil(start);
	    step = step == null ? 1 : Math.floor(step);
	    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
	    do range.push(new Date(+start)); while ((offseti(start, step), floori(start), start < stop));
	    return range;
	  };

	  interval.filter = function (test) {
	    return newInterval(function (date) {
	      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
	    }, function (date, step) {
	      if (date >= date) while (--step >= 0) while (offseti(date, 1), !test(date)) {} // eslint-disable-line no-empty
	    });
	  };

	  if (count) {
	    interval.count = function (start, end) {
	      t0$1.setTime(+start), t1$1.setTime(+end);
	      floori(t0$1), floori(t1$1);
	      return Math.floor(count(t0$1, t1$1));
	    };

	    interval.every = function (step) {
	      step = Math.floor(step);
	      return !isFinite(step) || !(step > 0) ? null : !(step > 1) ? interval : interval.filter(field ? function (d) {
	        return field(d) % step === 0;
	      } : function (d) {
	        return interval.count(0, d) % step === 0;
	      });
	    };
	  }

	  return interval;
	}

	var millisecond = newInterval(function () {
	  // noop
	}, function (date, step) {
	  date.setTime(+date + step);
	}, function (start, end) {
	  return end - start;
	});

	// An optimized implementation for this simple case.
	millisecond.every = function (k) {
	  k = Math.floor(k);
	  if (!isFinite(k) || !(k > 0)) return null;
	  if (!(k > 1)) return millisecond;
	  return newInterval(function (date) {
	    date.setTime(Math.floor(date / k) * k);
	  }, function (date, step) {
	    date.setTime(+date + step * k);
	  }, function (start, end) {
	    return (end - start) / k;
	  });
	};

	var milliseconds = millisecond.range;

	var durationSecond = 1e3;
	var durationMinute = 6e4;
	var durationHour = 36e5;
	var durationDay = 864e5;
	var durationWeek = 6048e5;

	var second = newInterval(function (date) {
	  date.setTime(Math.floor(date / durationSecond) * durationSecond);
	}, function (date, step) {
	  date.setTime(+date + step * durationSecond);
	}, function (start, end) {
	  return (end - start) / durationSecond;
	}, function (date) {
	  return date.getUTCSeconds();
	});

	var seconds = second.range;

	var minute = newInterval(function (date) {
	  date.setTime(Math.floor(date / durationMinute) * durationMinute);
	}, function (date, step) {
	  date.setTime(+date + step * durationMinute);
	}, function (start, end) {
	  return (end - start) / durationMinute;
	}, function (date) {
	  return date.getMinutes();
	});

	var minutes = minute.range;

	var hour = newInterval(function (date) {
	  var offset = date.getTimezoneOffset() * durationMinute % durationHour;
	  if (offset < 0) offset += durationHour;
	  date.setTime(Math.floor((+date - offset) / durationHour) * durationHour + offset);
	}, function (date, step) {
	  date.setTime(+date + step * durationHour);
	}, function (start, end) {
	  return (end - start) / durationHour;
	}, function (date) {
	  return date.getHours();
	});

	var hours = hour.range;

	var day = newInterval(function (date) {
	  date.setHours(0, 0, 0, 0);
	}, function (date, step) {
	  date.setDate(date.getDate() + step);
	}, function (start, end) {
	  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay;
	}, function (date) {
	  return date.getDate() - 1;
	});

	var days = day.range;

	function weekday(i) {
	  return newInterval(function (date) {
	    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
	    date.setHours(0, 0, 0, 0);
	  }, function (date, step) {
	    date.setDate(date.getDate() + step * 7);
	  }, function (start, end) {
	    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
	  });
	}

	var timeWeek = weekday(0);
	var timeMonday = weekday(1);
	var tuesday = weekday(2);
	var wednesday = weekday(3);
	var thursday = weekday(4);
	var friday = weekday(5);
	var saturday = weekday(6);

	var sundays = timeWeek.range;
	var mondays = timeMonday.range;
	var tuesdays = tuesday.range;
	var wednesdays = wednesday.range;
	var thursdays = thursday.range;
	var fridays = friday.range;
	var saturdays = saturday.range;

	var month = newInterval(function (date) {
	  date.setDate(1);
	  date.setHours(0, 0, 0, 0);
	}, function (date, step) {
	  date.setMonth(date.getMonth() + step);
	}, function (start, end) {
	  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
	}, function (date) {
	  return date.getMonth();
	});

	var months = month.range;

	var year = newInterval(function (date) {
	  date.setMonth(0, 1);
	  date.setHours(0, 0, 0, 0);
	}, function (date, step) {
	  date.setFullYear(date.getFullYear() + step);
	}, function (start, end) {
	  return end.getFullYear() - start.getFullYear();
	}, function (date) {
	  return date.getFullYear();
	});

	// An optimized implementation for this simple case.
	year.every = function (k) {
	  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function (date) {
	    date.setFullYear(Math.floor(date.getFullYear() / k) * k);
	    date.setMonth(0, 1);
	    date.setHours(0, 0, 0, 0);
	  }, function (date, step) {
	    date.setFullYear(date.getFullYear() + step * k);
	  });
	};

	var years = year.range;

	var utcMinute = newInterval(function (date) {
	  date.setUTCSeconds(0, 0);
	}, function (date, step) {
	  date.setTime(+date + step * durationMinute);
	}, function (start, end) {
	  return (end - start) / durationMinute;
	}, function (date) {
	  return date.getUTCMinutes();
	});

	var utcMinutes = utcMinute.range;

	var utcHour = newInterval(function (date) {
	  date.setUTCMinutes(0, 0, 0);
	}, function (date, step) {
	  date.setTime(+date + step * durationHour);
	}, function (start, end) {
	  return (end - start) / durationHour;
	}, function (date) {
	  return date.getUTCHours();
	});

	var utcHours = utcHour.range;

	var utcDay = newInterval(function (date) {
	  date.setUTCHours(0, 0, 0, 0);
	}, function (date, step) {
	  date.setUTCDate(date.getUTCDate() + step);
	}, function (start, end) {
	  return (end - start) / durationDay;
	}, function (date) {
	  return date.getUTCDate() - 1;
	});

	var utcDays = utcDay.range;

	function utcWeekday(i) {
	  return newInterval(function (date) {
	    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
	    date.setUTCHours(0, 0, 0, 0);
	  }, function (date, step) {
	    date.setUTCDate(date.getUTCDate() + step * 7);
	  }, function (start, end) {
	    return (end - start) / durationWeek;
	  });
	}

	var utcWeek = utcWeekday(0);
	var utcMonday = utcWeekday(1);
	var utcTuesday = utcWeekday(2);
	var utcWednesday = utcWeekday(3);
	var utcThursday = utcWeekday(4);
	var utcFriday = utcWeekday(5);
	var utcSaturday = utcWeekday(6);

	var utcSundays = utcWeek.range;
	var utcMondays = utcMonday.range;
	var utcTuesdays = utcTuesday.range;
	var utcWednesdays = utcWednesday.range;
	var utcThursdays = utcThursday.range;
	var utcFridays = utcFriday.range;
	var utcSaturdays = utcSaturday.range;

	var utcMonth = newInterval(function (date) {
	  date.setUTCDate(1);
	  date.setUTCHours(0, 0, 0, 0);
	}, function (date, step) {
	  date.setUTCMonth(date.getUTCMonth() + step);
	}, function (start, end) {
	  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
	}, function (date) {
	  return date.getUTCMonth();
	});

	var utcMonths = utcMonth.range;

	var utcYear = newInterval(function (date) {
	  date.setUTCMonth(0, 1);
	  date.setUTCHours(0, 0, 0, 0);
	}, function (date, step) {
	  date.setUTCFullYear(date.getUTCFullYear() + step);
	}, function (start, end) {
	  return end.getUTCFullYear() - start.getUTCFullYear();
	}, function (date) {
	  return date.getUTCFullYear();
	});

	// An optimized implementation for this simple case.
	utcYear.every = function (k) {
	  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function (date) {
	    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
	    date.setUTCMonth(0, 1);
	    date.setUTCHours(0, 0, 0, 0);
	  }, function (date, step) {
	    date.setUTCFullYear(date.getUTCFullYear() + step * k);
	  });
	};

	var utcYears = utcYear.range;

	// Computes the decimal coefficient and exponent of the specified number x with
	// significant digits p, where x is positive and p is in [1, 21] or undefined.
	// For example, formatDecimal(1.23) returns ["123", 0].
	function formatDecimal (x, p) {
	  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
	  var i,
	      coefficient = x.slice(0, i);

	  // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
	  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
	  return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
	}

	function exponent$1 (x) {
	  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
	}

	function formatGroup (grouping, thousands) {
	  return function (value, width) {
	    var i = value.length,
	        t = [],
	        j = 0,
	        g = grouping[0],
	        length = 0;

	    while (i > 0 && g > 0) {
	      if (length + g + 1 > width) g = Math.max(1, width - length);
	      t.push(value.substring(i -= g, i + g));
	      if ((length += g + 1) > width) break;
	      g = grouping[j = (j + 1) % grouping.length];
	    }

	    return t.reverse().join(thousands);
	  };
	}

	function formatDefault (x, p) {
	  x = x.toPrecision(p);

	  out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {
	    switch (x[i]) {
	      case ".":
	        i0 = i1 = i;break;
	      case "0":
	        if (i0 === 0) i0 = i;i1 = i;break;
	      case "e":
	        break out;
	      default:
	        if (i0 > 0) i0 = 0;break;
	    }
	  }

	  return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;
	}

	var prefixExponent;

	function formatPrefixAuto (x, p) {
	    var d = formatDecimal(x, p);
	    if (!d) return x + "";
	    var coefficient = d[0],
	        exponent = d[1],
	        i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
	        n = coefficient.length;
	    return i === n ? coefficient : i > n ? coefficient + new Array(i - n + 1).join("0") : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
	}

	function formatRounded (x, p) {
	    var d = formatDecimal(x, p);
	    if (!d) return x + "";
	    var coefficient = d[0],
	        exponent = d[1];
	    return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) : coefficient + new Array(exponent - coefficient.length + 2).join("0");
	}

	var formatTypes = {
	  "": formatDefault,
	  "%": function (x, p) {
	    return (x * 100).toFixed(p);
	  },
	  "b": function (x) {
	    return Math.round(x).toString(2);
	  },
	  "c": function (x) {
	    return x + "";
	  },
	  "d": function (x) {
	    return Math.round(x).toString(10);
	  },
	  "e": function (x, p) {
	    return x.toExponential(p);
	  },
	  "f": function (x, p) {
	    return x.toFixed(p);
	  },
	  "g": function (x, p) {
	    return x.toPrecision(p);
	  },
	  "o": function (x) {
	    return Math.round(x).toString(8);
	  },
	  "p": function (x, p) {
	    return formatRounded(x * 100, p);
	  },
	  "r": formatRounded,
	  "s": formatPrefixAuto,
	  "X": function (x) {
	    return Math.round(x).toString(16).toUpperCase();
	  },
	  "x": function (x) {
	    return Math.round(x).toString(16);
	  }
	};

	// [[fill]align][sign][symbol][0][width][,][.precision][type]
	var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i;

	function formatSpecifier (specifier) {
	  return new FormatSpecifier(specifier);
	}

	function FormatSpecifier(specifier) {
	  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);

	  var match,
	      fill = match[1] || " ",
	      align = match[2] || ">",
	      sign = match[3] || "-",
	      symbol = match[4] || "",
	      zero = !!match[5],
	      width = match[6] && +match[6],
	      comma = !!match[7],
	      precision = match[8] && +match[8].slice(1),
	      type = match[9] || "";

	  // The "n" type is an alias for ",g".
	  if (type === "n") comma = true, type = "g";

	  // Map invalid types to the default format.
	  else if (!formatTypes[type]) type = "";

	  // If zero fill is specified, padding goes after sign and before digits.
	  if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "=";

	  this.fill = fill;
	  this.align = align;
	  this.sign = sign;
	  this.symbol = symbol;
	  this.zero = zero;
	  this.width = width;
	  this.comma = comma;
	  this.precision = precision;
	  this.type = type;
	}

	FormatSpecifier.prototype.toString = function () {
	  return this.fill + this.align + this.sign + this.symbol + (this.zero ? "0" : "") + (this.width == null ? "" : Math.max(1, this.width | 0)) + (this.comma ? "," : "") + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0)) + this.type;
	};

	var prefixes = ["y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];

	function identity$3(x) {
	  return x;
	}

	function formatLocale (locale) {
	  var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
	      currency = locale.currency,
	      decimal = locale.decimal;

	  function newFormat(specifier) {
	    specifier = formatSpecifier(specifier);

	    var fill = specifier.fill,
	        align = specifier.align,
	        sign = specifier.sign,
	        symbol = specifier.symbol,
	        zero = specifier.zero,
	        width = specifier.width,
	        comma = specifier.comma,
	        precision = specifier.precision,
	        type = specifier.type;

	    // Compute the prefix and suffix.
	    // For SI-prefix, the suffix is lazily computed.
	    var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
	        suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? "%" : "";

	    // What format function should we use?
	    // Is this an integer type?
	    // Can this type generate exponential notation?
	    var formatType = formatTypes[type],
	        maybeSuffix = !type || /[defgprs%]/.test(type);

	    // Set the default precision if not specified,
	    // or clamp the specified precision to the supported range.
	    // For significant precision, it must be in [1, 21].
	    // For fixed precision, it must be in [0, 20].
	    precision = precision == null ? type ? 6 : 12 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));

	    function format(value) {
	      var valuePrefix = prefix,
	          valueSuffix = suffix,
	          i,
	          n,
	          c;

	      if (type === "c") {
	        valueSuffix = formatType(value) + valueSuffix;
	        value = "";
	      } else {
	        value = +value;

	        // Convert negative to positive, and compute the prefix.
	        // Note that -0 is not less than 0, but 1 / -0 is!
	        var valueNegative = (value < 0 || 1 / value < 0) && (value *= -1, true);

	        // Perform the initial formatting.
	        value = formatType(value, precision);

	        // If the original value was negative, it may be rounded to zero during
	        // formatting; treat this as (positive) zero.
	        if (valueNegative) {
	          i = -1, n = value.length;
	          valueNegative = false;
	          while (++i < n) {
	            if (c = value.charCodeAt(i), 48 < c && c < 58 || type === "x" && 96 < c && c < 103 || type === "X" && 64 < c && c < 71) {
	              valueNegative = true;
	              break;
	            }
	          }
	        }

	        // Compute the prefix and suffix.
	        valuePrefix = (valueNegative ? sign === "(" ? sign : "-" : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
	        valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : "");

	        // Break the formatted value into the integer “value” part that can be
	        // grouped, and fractional or exponential “suffix” part that is not.
	        if (maybeSuffix) {
	          i = -1, n = value.length;
	          while (++i < n) {
	            if (c = value.charCodeAt(i), 48 > c || c > 57) {
	              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
	              value = value.slice(0, i);
	              break;
	            }
	          }
	        }
	      }

	      // If the fill character is not "0", grouping is applied before padding.
	      if (comma && !zero) value = group(value, Infinity);

	      // Compute the padding.
	      var length = valuePrefix.length + value.length + valueSuffix.length,
	          padding = length < width ? new Array(width - length + 1).join(fill) : "";

	      // If the fill character is "0", grouping is applied after padding.
	      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";

	      // Reconstruct the final output based on the desired alignment.
	      switch (align) {
	        case "<":
	          return valuePrefix + value + valueSuffix + padding;
	        case "=":
	          return valuePrefix + padding + value + valueSuffix;
	        case "^":
	          return padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
	      }
	      return padding + valuePrefix + value + valueSuffix;
	    }

	    format.toString = function () {
	      return specifier + "";
	    };

	    return format;
	  }

	  function formatPrefix(specifier, value) {
	    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
	        e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3,
	        k = Math.pow(10, -e),
	        prefix = prefixes[8 + e / 3];
	    return function (value) {
	      return f(k * value) + prefix;
	    };
	  }

	  return {
	    format: newFormat,
	    formatPrefix: formatPrefix
	  };
	}

	var locale;
	var format;
	var formatPrefix;

	defaultLocale({
	  decimal: ".",
	  thousands: ",",
	  grouping: [3],
	  currency: ["$", ""]
	});

	function defaultLocale(definition) {
	  locale = formatLocale(definition);
	  format = locale.format;
	  formatPrefix = locale.formatPrefix;
	  return locale;
	}

	function precisionFixed (step) {
	  return Math.max(0, -exponent$1(Math.abs(step)));
	}

	function precisionPrefix (step, value) {
	  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));
	}

	function precisionRound (step, max) {
	  step = Math.abs(step), max = Math.abs(max) - step;
	  return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;
	}

	function localDate(d) {
	  if (0 <= d.y && d.y < 100) {
	    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
	    date.setFullYear(d.y);
	    return date;
	  }
	  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
	}

	function utcDate(d) {
	  if (0 <= d.y && d.y < 100) {
	    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
	    date.setUTCFullYear(d.y);
	    return date;
	  }
	  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
	}

	function newYear(y) {
	  return { y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0 };
	}

	function formatLocale$1(locale) {
	  var locale_dateTime = locale.dateTime,
	      locale_date = locale.date,
	      locale_time = locale.time,
	      locale_periods = locale.periods,
	      locale_weekdays = locale.days,
	      locale_shortWeekdays = locale.shortDays,
	      locale_months = locale.months,
	      locale_shortMonths = locale.shortMonths;

	  var periodRe = formatRe(locale_periods),
	      periodLookup = formatLookup(locale_periods),
	      weekdayRe = formatRe(locale_weekdays),
	      weekdayLookup = formatLookup(locale_weekdays),
	      shortWeekdayRe = formatRe(locale_shortWeekdays),
	      shortWeekdayLookup = formatLookup(locale_shortWeekdays),
	      monthRe = formatRe(locale_months),
	      monthLookup = formatLookup(locale_months),
	      shortMonthRe = formatRe(locale_shortMonths),
	      shortMonthLookup = formatLookup(locale_shortMonths);

	  var formats = {
	    "a": formatShortWeekday,
	    "A": formatWeekday,
	    "b": formatShortMonth,
	    "B": formatMonth,
	    "c": null,
	    "d": formatDayOfMonth,
	    "e": formatDayOfMonth,
	    "H": formatHour24,
	    "I": formatHour12,
	    "j": formatDayOfYear,
	    "L": formatMilliseconds,
	    "m": formatMonthNumber,
	    "M": formatMinutes,
	    "p": formatPeriod,
	    "S": formatSeconds,
	    "U": formatWeekNumberSunday,
	    "w": formatWeekdayNumber,
	    "W": formatWeekNumberMonday,
	    "x": null,
	    "X": null,
	    "y": formatYear,
	    "Y": formatFullYear,
	    "Z": formatZone,
	    "%": formatLiteralPercent
	  };

	  var utcFormats = {
	    "a": formatUTCShortWeekday,
	    "A": formatUTCWeekday,
	    "b": formatUTCShortMonth,
	    "B": formatUTCMonth,
	    "c": null,
	    "d": formatUTCDayOfMonth,
	    "e": formatUTCDayOfMonth,
	    "H": formatUTCHour24,
	    "I": formatUTCHour12,
	    "j": formatUTCDayOfYear,
	    "L": formatUTCMilliseconds,
	    "m": formatUTCMonthNumber,
	    "M": formatUTCMinutes,
	    "p": formatUTCPeriod,
	    "S": formatUTCSeconds,
	    "U": formatUTCWeekNumberSunday,
	    "w": formatUTCWeekdayNumber,
	    "W": formatUTCWeekNumberMonday,
	    "x": null,
	    "X": null,
	    "y": formatUTCYear,
	    "Y": formatUTCFullYear,
	    "Z": formatUTCZone,
	    "%": formatLiteralPercent
	  };

	  var parses = {
	    "a": parseShortWeekday,
	    "A": parseWeekday,
	    "b": parseShortMonth,
	    "B": parseMonth,
	    "c": parseLocaleDateTime,
	    "d": parseDayOfMonth,
	    "e": parseDayOfMonth,
	    "H": parseHour24,
	    "I": parseHour24,
	    "j": parseDayOfYear,
	    "L": parseMilliseconds,
	    "m": parseMonthNumber,
	    "M": parseMinutes,
	    "p": parsePeriod,
	    "S": parseSeconds,
	    "U": parseWeekNumberSunday,
	    "w": parseWeekdayNumber,
	    "W": parseWeekNumberMonday,
	    "x": parseLocaleDate,
	    "X": parseLocaleTime,
	    "y": parseYear,
	    "Y": parseFullYear,
	    "Z": parseZone,
	    "%": parseLiteralPercent
	  };

	  // These recursive directive definitions must be deferred.
	  formats.x = newFormat(locale_date, formats);
	  formats.X = newFormat(locale_time, formats);
	  formats.c = newFormat(locale_dateTime, formats);
	  utcFormats.x = newFormat(locale_date, utcFormats);
	  utcFormats.X = newFormat(locale_time, utcFormats);
	  utcFormats.c = newFormat(locale_dateTime, utcFormats);

	  function newFormat(specifier, formats) {
	    return function (date) {
	      var string = [],
	          i = -1,
	          j = 0,
	          n = specifier.length,
	          c,
	          pad,
	          format;

	      if (!(date instanceof Date)) date = new Date(+date);

	      while (++i < n) {
	        if (specifier.charCodeAt(i) === 37) {
	          string.push(specifier.slice(j, i));
	          if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);else pad = c === "e" ? " " : "0";
	          if (format = formats[c]) c = format(date, pad);
	          string.push(c);
	          j = i + 1;
	        }
	      }

	      string.push(specifier.slice(j, i));
	      return string.join("");
	    };
	  }

	  function newParse(specifier, newDate) {
	    return function (string) {
	      var d = newYear(1900),
	          i = parseSpecifier(d, specifier, string += "", 0);
	      if (i != string.length) return null;

	      // The am-pm flag is 0 for AM, and 1 for PM.
	      if ("p" in d) d.H = d.H % 12 + d.p * 12;

	      // Convert day-of-week and week-of-year to day-of-year.
	      if ("W" in d || "U" in d) {
	        if (!("w" in d)) d.w = "W" in d ? 1 : 0;
	        var day = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
	        d.m = 0;
	        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day + 5) % 7 : d.w + d.U * 7 - (day + 6) % 7;
	      }

	      // If a time zone is specified, all fields are interpreted as UTC and then
	      // offset according to the specified time zone.
	      if ("Z" in d) {
	        d.H += d.Z / 100 | 0;
	        d.M += d.Z % 100;
	        return utcDate(d);
	      }

	      // Otherwise, all fields are in local time.
	      return newDate(d);
	    };
	  }

	  function parseSpecifier(d, specifier, string, j) {
	    var i = 0,
	        n = specifier.length,
	        m = string.length,
	        c,
	        parse;

	    while (i < n) {
	      if (j >= m) return -1;
	      c = specifier.charCodeAt(i++);
	      if (c === 37) {
	        c = specifier.charAt(i++);
	        parse = parses[c in pads ? specifier.charAt(i++) : c];
	        if (!parse || (j = parse(d, string, j)) < 0) return -1;
	      } else if (c != string.charCodeAt(j++)) {
	        return -1;
	      }
	    }

	    return j;
	  }

	  function parsePeriod(d, string, i) {
	    var n = periodRe.exec(string.slice(i));
	    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;
	  }

	  function parseShortWeekday(d, string, i) {
	    var n = shortWeekdayRe.exec(string.slice(i));
	    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
	  }

	  function parseWeekday(d, string, i) {
	    var n = weekdayRe.exec(string.slice(i));
	    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
	  }

	  function parseShortMonth(d, string, i) {
	    var n = shortMonthRe.exec(string.slice(i));
	    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
	  }

	  function parseMonth(d, string, i) {
	    var n = monthRe.exec(string.slice(i));
	    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
	  }

	  function parseLocaleDateTime(d, string, i) {
	    return parseSpecifier(d, locale_dateTime, string, i);
	  }

	  function parseLocaleDate(d, string, i) {
	    return parseSpecifier(d, locale_date, string, i);
	  }

	  function parseLocaleTime(d, string, i) {
	    return parseSpecifier(d, locale_time, string, i);
	  }

	  function formatShortWeekday(d) {
	    return locale_shortWeekdays[d.getDay()];
	  }

	  function formatWeekday(d) {
	    return locale_weekdays[d.getDay()];
	  }

	  function formatShortMonth(d) {
	    return locale_shortMonths[d.getMonth()];
	  }

	  function formatMonth(d) {
	    return locale_months[d.getMonth()];
	  }

	  function formatPeriod(d) {
	    return locale_periods[+(d.getHours() >= 12)];
	  }

	  function formatUTCShortWeekday(d) {
	    return locale_shortWeekdays[d.getUTCDay()];
	  }

	  function formatUTCWeekday(d) {
	    return locale_weekdays[d.getUTCDay()];
	  }

	  function formatUTCShortMonth(d) {
	    return locale_shortMonths[d.getUTCMonth()];
	  }

	  function formatUTCMonth(d) {
	    return locale_months[d.getUTCMonth()];
	  }

	  function formatUTCPeriod(d) {
	    return locale_periods[+(d.getUTCHours() >= 12)];
	  }

	  return {
	    format: function (specifier) {
	      var f = newFormat(specifier += "", formats);
	      f.toString = function () {
	        return specifier;
	      };
	      return f;
	    },
	    parse: function (specifier) {
	      var p = newParse(specifier += "", localDate);
	      p.toString = function () {
	        return specifier;
	      };
	      return p;
	    },
	    utcFormat: function (specifier) {
	      var f = newFormat(specifier += "", utcFormats);
	      f.toString = function () {
	        return specifier;
	      };
	      return f;
	    },
	    utcParse: function (specifier) {
	      var p = newParse(specifier, utcDate);
	      p.toString = function () {
	        return specifier;
	      };
	      return p;
	    }
	  };
	}

	var pads = { "-": "", "_": " ", "0": "0" };
	var numberRe = /^\s*\d+/;
	var percentRe = /^%/;
	var requoteRe = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;
	function pad(value, fill, width) {
	  var sign = value < 0 ? "-" : "",
	      string = (sign ? -value : value) + "",
	      length = string.length;
	  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
	}

	function requote(s) {
	  return s.replace(requoteRe, "\\$&");
	}

	function formatRe(names) {
	  return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");
	}

	function formatLookup(names) {
	  var map = {},
	      i = -1,
	      n = names.length;
	  while (++i < n) map[names[i].toLowerCase()] = i;
	  return map;
	}

	function parseWeekdayNumber(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 1));
	  return n ? (d.w = +n[0], i + n[0].length) : -1;
	}

	function parseWeekNumberSunday(d, string, i) {
	  var n = numberRe.exec(string.slice(i));
	  return n ? (d.U = +n[0], i + n[0].length) : -1;
	}

	function parseWeekNumberMonday(d, string, i) {
	  var n = numberRe.exec(string.slice(i));
	  return n ? (d.W = +n[0], i + n[0].length) : -1;
	}

	function parseFullYear(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 4));
	  return n ? (d.y = +n[0], i + n[0].length) : -1;
	}

	function parseYear(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 2));
	  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
	}

	function parseZone(d, string, i) {
	  var n = /^(Z)|([+-]\d\d)(?:\:?(\d\d))?/.exec(string.slice(i, i + 6));
	  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
	}

	function parseMonthNumber(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 2));
	  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
	}

	function parseDayOfMonth(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 2));
	  return n ? (d.d = +n[0], i + n[0].length) : -1;
	}

	function parseDayOfYear(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 3));
	  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
	}

	function parseHour24(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 2));
	  return n ? (d.H = +n[0], i + n[0].length) : -1;
	}

	function parseMinutes(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 2));
	  return n ? (d.M = +n[0], i + n[0].length) : -1;
	}

	function parseSeconds(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 2));
	  return n ? (d.S = +n[0], i + n[0].length) : -1;
	}

	function parseMilliseconds(d, string, i) {
	  var n = numberRe.exec(string.slice(i, i + 3));
	  return n ? (d.L = +n[0], i + n[0].length) : -1;
	}

	function parseLiteralPercent(d, string, i) {
	  var n = percentRe.exec(string.slice(i, i + 1));
	  return n ? i + n[0].length : -1;
	}

	function formatDayOfMonth(d, p) {
	  return pad(d.getDate(), p, 2);
	}

	function formatHour24(d, p) {
	  return pad(d.getHours(), p, 2);
	}

	function formatHour12(d, p) {
	  return pad(d.getHours() % 12 || 12, p, 2);
	}

	function formatDayOfYear(d, p) {
	  return pad(1 + day.count(year(d), d), p, 3);
	}

	function formatMilliseconds(d, p) {
	  return pad(d.getMilliseconds(), p, 3);
	}

	function formatMonthNumber(d, p) {
	  return pad(d.getMonth() + 1, p, 2);
	}

	function formatMinutes(d, p) {
	  return pad(d.getMinutes(), p, 2);
	}

	function formatSeconds(d, p) {
	  return pad(d.getSeconds(), p, 2);
	}

	function formatWeekNumberSunday(d, p) {
	  return pad(timeWeek.count(year(d), d), p, 2);
	}

	function formatWeekdayNumber(d) {
	  return d.getDay();
	}

	function formatWeekNumberMonday(d, p) {
	  return pad(timeMonday.count(year(d), d), p, 2);
	}

	function formatYear(d, p) {
	  return pad(d.getFullYear() % 100, p, 2);
	}

	function formatFullYear(d, p) {
	  return pad(d.getFullYear() % 10000, p, 4);
	}

	function formatZone(d) {
	  var z = d.getTimezoneOffset();
	  return (z > 0 ? "-" : (z *= -1, "+")) + pad(z / 60 | 0, "0", 2) + pad(z % 60, "0", 2);
	}

	function formatUTCDayOfMonth(d, p) {
	  return pad(d.getUTCDate(), p, 2);
	}

	function formatUTCHour24(d, p) {
	  return pad(d.getUTCHours(), p, 2);
	}

	function formatUTCHour12(d, p) {
	  return pad(d.getUTCHours() % 12 || 12, p, 2);
	}

	function formatUTCDayOfYear(d, p) {
	  return pad(1 + utcDay.count(utcYear(d), d), p, 3);
	}

	function formatUTCMilliseconds(d, p) {
	  return pad(d.getUTCMilliseconds(), p, 3);
	}

	function formatUTCMonthNumber(d, p) {
	  return pad(d.getUTCMonth() + 1, p, 2);
	}

	function formatUTCMinutes(d, p) {
	  return pad(d.getUTCMinutes(), p, 2);
	}

	function formatUTCSeconds(d, p) {
	  return pad(d.getUTCSeconds(), p, 2);
	}

	function formatUTCWeekNumberSunday(d, p) {
	  return pad(utcWeek.count(utcYear(d), d), p, 2);
	}

	function formatUTCWeekdayNumber(d) {
	  return d.getUTCDay();
	}

	function formatUTCWeekNumberMonday(d, p) {
	  return pad(utcMonday.count(utcYear(d), d), p, 2);
	}

	function formatUTCYear(d, p) {
	  return pad(d.getUTCFullYear() % 100, p, 2);
	}

	function formatUTCFullYear(d, p) {
	  return pad(d.getUTCFullYear() % 10000, p, 4);
	}

	function formatUTCZone() {
	  return "+0000";
	}

	function formatLiteralPercent() {
	  return "%";
	}

	var locale$1;
	var timeFormat;
	var timeParse;
	var utcFormat;
	var utcParse;

	defaultLocale$1({
	  dateTime: "%x, %X",
	  date: "%-m/%-d/%Y",
	  time: "%-I:%M:%S %p",
	  periods: ["AM", "PM"],
	  days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
	  shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
	  months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
	  shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
	});

	function defaultLocale$1(definition) {
	  locale$1 = formatLocale$1(definition);
	  timeFormat = locale$1.format;
	  timeParse = locale$1.parse;
	  utcFormat = locale$1.utcFormat;
	  utcParse = locale$1.utcParse;
	  return locale$1;
	}

	var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";

	function formatIsoNative(date) {
	    return date.toISOString();
	}

	var formatIso = Date.prototype.toISOString ? formatIsoNative : utcFormat(isoSpecifier);

	function parseIsoNative(string) {
	  var date = new Date(string);
	  return isNaN(date) ? null : date;
	}

	var parseIso = +new Date("2000-01-01T00:00:00.000Z") ? parseIsoNative : utcParse(isoSpecifier);

	var array$2 = Array.prototype;

	var map$2 = array$2.map;
	var slice$3 = array$2.slice;

	var implicit = { name: "implicit" };

	function ordinal(range) {
	  var index = map$1(),
	      domain = [],
	      unknown = implicit;

	  range = range == null ? [] : slice$3.call(range);

	  function scale(d) {
	    var key = d + "",
	        i = index.get(key);
	    if (!i) {
	      if (unknown !== implicit) return unknown;
	      index.set(key, i = domain.push(d));
	    }
	    return range[(i - 1) % range.length];
	  }

	  scale.domain = function (_) {
	    if (!arguments.length) return domain.slice();
	    domain = [], index = map$1();
	    var i = -1,
	        n = _.length,
	        d,
	        key;
	    while (++i < n) if (!index.has(key = (d = _[i]) + "")) index.set(key, domain.push(d));
	    return scale;
	  };

	  scale.range = function (_) {
	    return arguments.length ? (range = slice$3.call(_), scale) : range.slice();
	  };

	  scale.unknown = function (_) {
	    return arguments.length ? (unknown = _, scale) : unknown;
	  };

	  scale.copy = function () {
	    return ordinal().domain(domain).range(range).unknown(unknown);
	  };

	  return scale;
	}

	function band() {
	  var scale = ordinal().unknown(undefined),
	      domain = scale.domain,
	      ordinalRange = scale.range,
	      range$$ = [0, 1],
	      step,
	      bandwidth,
	      round = false,
	      paddingInner = 0,
	      paddingOuter = 0,
	      align = 0.5;

	  delete scale.unknown;

	  function rescale() {
	    var n = domain().length,
	        reverse = range$$[1] < range$$[0],
	        start = range$$[reverse - 0],
	        stop = range$$[1 - reverse];
	    step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
	    if (round) step = Math.floor(step);
	    start += (stop - start - step * (n - paddingInner)) * align;
	    bandwidth = step * (1 - paddingInner);
	    if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);
	    var values = range(n).map(function (i) {
	      return start + step * i;
	    });
	    return ordinalRange(reverse ? values.reverse() : values);
	  }

	  scale.domain = function (_) {
	    return arguments.length ? (domain(_), rescale()) : domain();
	  };

	  scale.range = function (_) {
	    return arguments.length ? (range$$ = [+_[0], +_[1]], rescale()) : range$$.slice();
	  };

	  scale.rangeRound = function (_) {
	    return range$$ = [+_[0], +_[1]], round = true, rescale();
	  };

	  scale.bandwidth = function () {
	    return bandwidth;
	  };

	  scale.step = function () {
	    return step;
	  };

	  scale.round = function (_) {
	    return arguments.length ? (round = !!_, rescale()) : round;
	  };

	  scale.padding = function (_) {
	    return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
	  };

	  scale.paddingInner = function (_) {
	    return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
	  };

	  scale.paddingOuter = function (_) {
	    return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter;
	  };

	  scale.align = function (_) {
	    return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;
	  };

	  scale.copy = function () {
	    return band().domain(domain()).range(range$$).round(round).paddingInner(paddingInner).paddingOuter(paddingOuter).align(align);
	  };

	  return rescale();
	}

	function pointish(scale) {
	  var copy = scale.copy;

	  scale.padding = scale.paddingOuter;
	  delete scale.paddingInner;
	  delete scale.paddingOuter;

	  scale.copy = function () {
	    return pointish(copy());
	  };

	  return scale;
	}

	function point$4() {
	  return pointish(band().paddingInner(1));
	}

	function constant$3 (x) {
	  return function () {
	    return x;
	  };
	}

	function number$1 (x) {
	  return +x;
	}

	var unit = [0, 1];

	function deinterpolate(a, b) {
	  return (b -= a = +a) ? function (x) {
	    return (x - a) / b;
	  } : constant$3(b);
	}

	function deinterpolateClamp(deinterpolate) {
	  return function (a, b) {
	    var d = deinterpolate(a = +a, b = +b);
	    return function (x) {
	      return x <= a ? 0 : x >= b ? 1 : d(x);
	    };
	  };
	}

	function reinterpolateClamp(reinterpolate) {
	  return function (a, b) {
	    var r = reinterpolate(a = +a, b = +b);
	    return function (t) {
	      return t <= 0 ? a : t >= 1 ? b : r(t);
	    };
	  };
	}

	function bimap(domain, range, deinterpolate, reinterpolate) {
	  var d0 = domain[0],
	      d1 = domain[1],
	      r0 = range[0],
	      r1 = range[1];
	  if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0);else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1);
	  return function (x) {
	    return r0(d0(x));
	  };
	}

	function polymap(domain, range, deinterpolate, reinterpolate) {
	  var j = Math.min(domain.length, range.length) - 1,
	      d = new Array(j),
	      r = new Array(j),
	      i = -1;

	  // Reverse descending domains.
	  if (domain[j] < domain[0]) {
	    domain = domain.slice().reverse();
	    range = range.slice().reverse();
	  }

	  while (++i < j) {
	    d[i] = deinterpolate(domain[i], domain[i + 1]);
	    r[i] = reinterpolate(range[i], range[i + 1]);
	  }

	  return function (x) {
	    var i = bisectRight(domain, x, 1, j) - 1;
	    return r[i](d[i](x));
	  };
	}

	function copy(source, target) {
	  return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp());
	}

	// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
	// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b].
	function continuous(deinterpolate$$, reinterpolate) {
	  var domain = unit,
	      range = unit,
	      interpolate$$ = interpolate,
	      clamp = false,
	      piecewise,
	      output,
	      input;

	  function rescale() {
	    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
	    output = input = null;
	    return scale;
	  }

	  function scale(x) {
	    return (output || (output = piecewise(domain, range, clamp ? deinterpolateClamp(deinterpolate$$) : deinterpolate$$, interpolate$$)))(+x);
	  }

	  scale.invert = function (y) {
	    return (input || (input = piecewise(range, domain, deinterpolate, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);
	  };

	  scale.domain = function (_) {
	    return arguments.length ? (domain = map$2.call(_, number$1), rescale()) : domain.slice();
	  };

	  scale.range = function (_) {
	    return arguments.length ? (range = slice$3.call(_), rescale()) : range.slice();
	  };

	  scale.rangeRound = function (_) {
	    return range = slice$3.call(_), interpolate$$ = interpolateRound, rescale();
	  };

	  scale.clamp = function (_) {
	    return arguments.length ? (clamp = !!_, rescale()) : clamp;
	  };

	  scale.interpolate = function (_) {
	    return arguments.length ? (interpolate$$ = _, rescale()) : interpolate$$;
	  };

	  return rescale();
	}

	function tickFormat (domain, count, specifier) {
	  var start = domain[0],
	      stop = domain[domain.length - 1],
	      step = tickStep(start, stop, count == null ? 10 : count),
	      precision;
	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
	  switch (specifier.type) {
	    case "s":
	      {
	        var value = Math.max(Math.abs(start), Math.abs(stop));
	        if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
	        return formatPrefix(specifier, value);
	      }
	    case "":
	    case "e":
	    case "g":
	    case "p":
	    case "r":
	      {
	        if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
	        break;
	      }
	    case "f":
	    case "%":
	      {
	        if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
	        break;
	      }
	  }
	  return format(specifier);
	}

	function linearish(scale) {
	  var domain = scale.domain;

	  scale.ticks = function (count) {
	    var d = domain();
	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
	  };

	  scale.tickFormat = function (count, specifier) {
	    return tickFormat(domain(), count, specifier);
	  };

	  scale.nice = function (count) {
	    var d = domain(),
	        i = d.length - 1,
	        n = count == null ? 10 : count,
	        start = d[0],
	        stop = d[i],
	        step = tickStep(start, stop, n);

	    if (step) {
	      step = tickStep(Math.floor(start / step) * step, Math.ceil(stop / step) * step, n);
	      d[0] = Math.floor(start / step) * step;
	      d[i] = Math.ceil(stop / step) * step;
	      domain(d);
	    }

	    return scale;
	  };

	  return scale;
	}

	function linear$2() {
	  var scale = continuous(deinterpolate, interpolateNumber);

	  scale.copy = function () {
	    return copy(scale, linear$2());
	  };

	  return linearish(scale);
	}

	function identity$4() {
	  var domain = [0, 1];

	  function scale(x) {
	    return +x;
	  }

	  scale.invert = scale;

	  scale.domain = scale.range = function (_) {
	    return arguments.length ? (domain = map$2.call(_, number$1), scale) : domain.slice();
	  };

	  scale.copy = function () {
	    return identity$4().domain(domain);
	  };

	  return linearish(scale);
	}

	function nice (domain, interval) {
	  domain = domain.slice();

	  var i0 = 0,
	      i1 = domain.length - 1,
	      x0 = domain[i0],
	      x1 = domain[i1],
	      t;

	  if (x1 < x0) {
	    t = i0, i0 = i1, i1 = t;
	    t = x0, x0 = x1, x1 = t;
	  }

	  domain[i0] = interval.floor(x0);
	  domain[i1] = interval.ceil(x1);
	  return domain;
	}

	function deinterpolate$1(a, b) {
	  return (b = Math.log(b / a)) ? function (x) {
	    return Math.log(x / a) / b;
	  } : constant$3(b);
	}

	function reinterpolate(a, b) {
	  return a < 0 ? function (t) {
	    return -Math.pow(-b, t) * Math.pow(-a, 1 - t);
	  } : function (t) {
	    return Math.pow(b, t) * Math.pow(a, 1 - t);
	  };
	}

	function pow10(x) {
	  return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x;
	}

	function powp(base) {
	  return base === 10 ? pow10 : base === Math.E ? Math.exp : function (x) {
	    return Math.pow(base, x);
	  };
	}

	function logp(base) {
	  return base === Math.E ? Math.log : base === 10 && Math.log10 || base === 2 && Math.log2 || (base = Math.log(base), function (x) {
	    return Math.log(x) / base;
	  });
	}

	function reflect(f) {
	  return function (x) {
	    return -f(-x);
	  };
	}

	function log() {
	  var scale = continuous(deinterpolate$1, reinterpolate).domain([1, 10]),
	      domain = scale.domain,
	      base = 10,
	      logs = logp(10),
	      pows = powp(10);

	  function rescale() {
	    logs = logp(base), pows = powp(base);
	    if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows);
	    return scale;
	  }

	  scale.base = function (_) {
	    return arguments.length ? (base = +_, rescale()) : base;
	  };

	  scale.domain = function (_) {
	    return arguments.length ? (domain(_), rescale()) : domain();
	  };

	  scale.ticks = function (count) {
	    var d = domain(),
	        u = d[0],
	        v = d[d.length - 1],
	        r;

	    if (r = v < u) i = u, u = v, v = i;

	    var i = logs(u),
	        j = logs(v),
	        p,
	        k,
	        t,
	        n = count == null ? 10 : +count,
	        z = [];

	    if (!(base % 1) && j - i < n) {
	      i = Math.round(i) - 1, j = Math.round(j) + 1;
	      if (u > 0) for (; i < j; ++i) {
	        for (k = 1, p = pows(i); k < base; ++k) {
	          t = p * k;
	          if (t < u) continue;
	          if (t > v) break;
	          z.push(t);
	        }
	      } else for (; i < j; ++i) {
	        for (k = base - 1, p = pows(i); k >= 1; --k) {
	          t = p * k;
	          if (t < u) continue;
	          if (t > v) break;
	          z.push(t);
	        }
	      }
	    } else {
	      z = ticks(i, j, Math.min(j - i, n)).map(pows);
	    }

	    return r ? z.reverse() : z;
	  };

	  scale.tickFormat = function (count, specifier) {
	    if (specifier == null) specifier = base === 10 ? ".0e" : ",";
	    if (typeof specifier !== "function") specifier = format(specifier);
	    if (count === Infinity) return specifier;
	    if (count == null) count = 10;
	    var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?
	    return function (d) {
	      var i = d / pows(Math.round(logs(d)));
	      if (i * base < base - 0.5) i *= base;
	      return i <= k ? specifier(d) : "";
	    };
	  };

	  scale.nice = function () {
	    return domain(nice(domain(), {
	      floor: function (x) {
	        return pows(Math.floor(logs(x)));
	      },
	      ceil: function (x) {
	        return pows(Math.ceil(logs(x)));
	      }
	    }));
	  };

	  scale.copy = function () {
	    return copy(scale, log().base(base));
	  };

	  return scale;
	}

	function raise(x, exponent) {
	  return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
	}

	function pow() {
	  var exponent = 1,
	      scale = continuous(deinterpolate, reinterpolate),
	      domain = scale.domain;

	  function deinterpolate(a, b) {
	    return (b = raise(b, exponent) - (a = raise(a, exponent))) ? function (x) {
	      return (raise(x, exponent) - a) / b;
	    } : constant$3(b);
	  }

	  function reinterpolate(a, b) {
	    b = raise(b, exponent) - (a = raise(a, exponent));
	    return function (t) {
	      return raise(a + b * t, 1 / exponent);
	    };
	  }

	  scale.exponent = function (_) {
	    return arguments.length ? (exponent = +_, domain(domain())) : exponent;
	  };

	  scale.copy = function () {
	    return copy(scale, pow().exponent(exponent));
	  };

	  return linearish(scale);
	}

	function sqrt() {
	  return pow().exponent(0.5);
	}

	function quantile() {
	  var domain = [],
	      range = [],
	      thresholds = [];

	  function rescale() {
	    var i = 0,
	        n = Math.max(1, range.length);
	    thresholds = new Array(n - 1);
	    while (++i < n) thresholds[i - 1] = threshold(domain, i / n);
	    return scale;
	  }

	  function scale(x) {
	    if (!isNaN(x = +x)) return range[bisectRight(thresholds, x)];
	  }

	  scale.invertExtent = function (y) {
	    var i = range.indexOf(y);
	    return i < 0 ? [NaN, NaN] : [i > 0 ? thresholds[i - 1] : domain[0], i < thresholds.length ? thresholds[i] : domain[domain.length - 1]];
	  };

	  scale.domain = function (_) {
	    if (!arguments.length) return domain.slice();
	    domain = [];
	    for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);
	    domain.sort(ascending);
	    return rescale();
	  };

	  scale.range = function (_) {
	    return arguments.length ? (range = slice$3.call(_), rescale()) : range.slice();
	  };

	  scale.quantiles = function () {
	    return thresholds.slice();
	  };

	  scale.copy = function () {
	    return quantile().domain(domain).range(range);
	  };

	  return scale;
	}

	function quantize$1() {
	  var x0 = 0,
	      x1 = 1,
	      n = 1,
	      domain = [0.5],
	      range = [0, 1];

	  function scale(x) {
	    if (x <= x) return range[bisectRight(domain, x, 0, n)];
	  }

	  function rescale() {
	    var i = -1;
	    domain = new Array(n);
	    while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
	    return scale;
	  }

	  scale.domain = function (_) {
	    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
	  };

	  scale.range = function (_) {
	    return arguments.length ? (n = (range = slice$3.call(_)).length - 1, rescale()) : range.slice();
	  };

	  scale.invertExtent = function (y) {
	    var i = range.indexOf(y);
	    return i < 0 ? [NaN, NaN] : i < 1 ? [x0, domain[0]] : i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
	  };

	  scale.copy = function () {
	    return quantize$1().domain([x0, x1]).range(range);
	  };

	  return linearish(scale);
	}

	function threshold$1() {
	  var domain = [0.5],
	      range = [0, 1],
	      n = 1;

	  function scale(x) {
	    if (x <= x) return range[bisectRight(domain, x, 0, n)];
	  }

	  scale.domain = function (_) {
	    return arguments.length ? (domain = slice$3.call(_), n = Math.min(domain.length, range.length - 1), scale) : domain.slice();
	  };

	  scale.range = function (_) {
	    return arguments.length ? (range = slice$3.call(_), n = Math.min(domain.length, range.length - 1), scale) : range.slice();
	  };

	  scale.invertExtent = function (y) {
	    var i = range.indexOf(y);
	    return [domain[i - 1], domain[i]];
	  };

	  scale.copy = function () {
	    return threshold$1().domain(domain).range(range);
	  };

	  return scale;
	}

var 	durationSecond$1 = 1000;
var 	durationMinute$1 = durationSecond$1 * 60;
var 	durationHour$1 = durationMinute$1 * 60;
var 	durationDay$1 = durationHour$1 * 24;
var 	durationWeek$1 = durationDay$1 * 7;
	var durationMonth = durationDay$1 * 30;
	var durationYear = durationDay$1 * 365;
	function date$1(t) {
	  return new Date(t);
	}

	function number$2(t) {
	  return t instanceof Date ? +t : +new Date(+t);
	}

	function calendar(year, month, week, day, hour, minute, second, millisecond, format) {
	  var scale = continuous(deinterpolate, interpolateNumber),
	      invert = scale.invert,
	      domain = scale.domain;

	  var formatMillisecond = format(".%L"),
	      formatSecond = format(":%S"),
	      formatMinute = format("%I:%M"),
	      formatHour = format("%I %p"),
	      formatDay = format("%a %d"),
	      formatWeek = format("%b %d"),
	      formatMonth = format("%B"),
	      formatYear = format("%Y");

	  var tickIntervals = [[second, 1, durationSecond$1], [second, 5, 5 * durationSecond$1], [second, 15, 15 * durationSecond$1], [second, 30, 30 * durationSecond$1], [minute, 1, durationMinute$1], [minute, 5, 5 * durationMinute$1], [minute, 15, 15 * durationMinute$1], [minute, 30, 30 * durationMinute$1], [hour, 1, durationHour$1], [hour, 3, 3 * durationHour$1], [hour, 6, 6 * durationHour$1], [hour, 12, 12 * durationHour$1], [day, 1, durationDay$1], [day, 2, 2 * durationDay$1], [week, 1, durationWeek$1], [month, 1, durationMonth], [month, 3, 3 * durationMonth], [year, 1, durationYear]];

	  function tickFormat(date) {
	    return (second(date) < date ? formatMillisecond : minute(date) < date ? formatSecond : hour(date) < date ? formatMinute : day(date) < date ? formatHour : month(date) < date ? week(date) < date ? formatDay : formatWeek : year(date) < date ? formatMonth : formatYear)(date);
	  }

	  function tickInterval(interval, start, stop, step) {
	    if (interval == null) interval = 10;

	    // If a desired tick count is specified, pick a reasonable tick interval
	    // based on the extent of the domain and a rough estimate of tick size.
	    // Otherwise, assume interval is already a time interval and use it.
	    if (typeof interval === "number") {
	      var target = Math.abs(stop - start) / interval,
	          i = bisector(function (i) {
	        return i[2];
	      }).right(tickIntervals, target);
	      if (i === tickIntervals.length) {
	        step = tickStep(start / durationYear, stop / durationYear, interval);
	        interval = year;
	      } else if (i) {
	        i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
	        step = i[1];
	        interval = i[0];
	      } else {
	        step = tickStep(start, stop, interval);
	        interval = millisecond;
	      }
	    }

	    return step == null ? interval : interval.every(step);
	  }

	  scale.invert = function (y) {
	    return new Date(invert(y));
	  };

	  scale.domain = function (_) {
	    return arguments.length ? domain(map$2.call(_, number$2)) : domain().map(date$1);
	  };

	  scale.ticks = function (interval, step) {
	    var d = domain(),
	        t0 = d[0],
	        t1 = d[d.length - 1],
	        r = t1 < t0,
	        t;
	    if (r) t = t0, t0 = t1, t1 = t;
	    t = tickInterval(interval, t0, t1, step);
	    t = t ? t.range(t0, t1 + 1) : []; // inclusive stop
	    return r ? t.reverse() : t;
	  };

	  scale.tickFormat = function (count, specifier) {
	    return specifier == null ? tickFormat : format(specifier);
	  };

	  scale.nice = function (interval, step) {
	    var d = domain();
	    return (interval = tickInterval(interval, d[0], d[d.length - 1], step)) ? domain(nice(d, interval)) : scale;
	  };

	  scale.copy = function () {
	    return copy(scale, calendar(year, month, week, day, hour, minute, second, millisecond, format));
	  };

	  return scale;
	}

	function scaleTime () {
	  return calendar(year, month, timeWeek, day, hour, minute, second, millisecond, timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);
	}

	function scaleUtc () {
	  return calendar(utcYear, utcMonth, utcWeek, utcDay, utcHour, utcMinute, second, millisecond, utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);
	}

	function colors (s) {
	  return s.match(/.{6}/g).map(function (x) {
	    return "#" + x;
	  });
	}

	var schemeCategory10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");

	var schemeCategory20b = colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6");

	var schemeCategory20c = colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9");

	var schemeCategory20 = colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5");

	var interpolateCubehelixDefault = interpolateCubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));

	var warm = interpolateCubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));

	var cool = interpolateCubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));

	var rainbow = cubehelix();

	function interpolateRainbow (t) {
	  if (t < 0 || t > 1) t -= Math.floor(t);
	  var ts = Math.abs(t - 0.5);
	  rainbow.h = 360 * t - 100;
	  rainbow.s = 1.5 - 1.5 * ts;
	  rainbow.l = 0.8 - 0.9 * ts;
	  return rainbow + "";
	}

	function ramp(range) {
	  var n = range.length;
	  return function (t) {
	    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
	  };
	}

	var interpolateViridis = ramp(colors("44015444025645045745055946075a46085c460a5d460b5e470d60470e6147106347116447136548146748166848176948186a481a6c481b6d481c6e481d6f481f70482071482173482374482475482576482677482878482979472a7a472c7a472d7b472e7c472f7d46307e46327e46337f463480453581453781453882443983443a83443b84433d84433e85423f854240864241864142874144874045884046883f47883f48893e49893e4a893e4c8a3d4d8a3d4e8a3c4f8a3c508b3b518b3b528b3a538b3a548c39558c39568c38588c38598c375a8c375b8d365c8d365d8d355e8d355f8d34608d34618d33628d33638d32648e32658e31668e31678e31688e30698e306a8e2f6b8e2f6c8e2e6d8e2e6e8e2e6f8e2d708e2d718e2c718e2c728e2c738e2b748e2b758e2a768e2a778e2a788e29798e297a8e297b8e287c8e287d8e277e8e277f8e27808e26818e26828e26828e25838e25848e25858e24868e24878e23888e23898e238a8d228b8d228c8d228d8d218e8d218f8d21908d21918c20928c20928c20938c1f948c1f958b1f968b1f978b1f988b1f998a1f9a8a1e9b8a1e9c891e9d891f9e891f9f881fa0881fa1881fa1871fa28720a38620a48621a58521a68522a78522a88423a98324aa8325ab8225ac8226ad8127ad8128ae8029af7f2ab07f2cb17e2db27d2eb37c2fb47c31b57b32b67a34b67935b77937b87838b9773aba763bbb753dbc743fbc7340bd7242be7144bf7046c06f48c16e4ac16d4cc26c4ec36b50c46a52c56954c56856c66758c7655ac8645cc8635ec96260ca6063cb5f65cb5e67cc5c69cd5b6ccd5a6ece5870cf5773d05675d05477d1537ad1517cd2507fd34e81d34d84d44b86d54989d5488bd6468ed64590d74393d74195d84098d83e9bd93c9dd93ba0da39a2da37a5db36a8db34aadc32addc30b0dd2fb2dd2db5de2bb8de29bade28bddf26c0df25c2df23c5e021c8e020cae11fcde11dd0e11cd2e21bd5e21ad8e219dae319dde318dfe318e2e418e5e419e7e419eae51aece51befe51cf1e51df4e61ef6e620f8e621fbe723fde725"));

	var magma = ramp(colors("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"));

	var inferno = ramp(colors("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"));

	var plasma = ramp(colors("0d088710078813078916078a19068c1b068d1d068e20068f2206902406912605912805922a05932c05942e05952f059631059733059735049837049938049a3a049a3c049b3e049c3f049c41049d43039e44039e46039f48039f4903a04b03a14c02a14e02a25002a25102a35302a35502a45601a45801a45901a55b01a55c01a65e01a66001a66100a76300a76400a76600a76700a86900a86a00a86c00a86e00a86f00a87100a87201a87401a87501a87701a87801a87a02a87b02a87d03a87e03a88004a88104a78305a78405a78606a68707a68808a68a09a58b0aa58d0ba58e0ca48f0da4910ea3920fa39410a29511a19613a19814a099159f9a169f9c179e9d189d9e199da01a9ca11b9ba21d9aa31e9aa51f99a62098a72197a82296aa2395ab2494ac2694ad2793ae2892b02991b12a90b22b8fb32c8eb42e8db52f8cb6308bb7318ab83289ba3388bb3488bc3587bd3786be3885bf3984c03a83c13b82c23c81c33d80c43e7fc5407ec6417dc7427cc8437bc9447aca457acb4679cc4778cc4977cd4a76ce4b75cf4c74d04d73d14e72d24f71d35171d45270d5536fd5546ed6556dd7566cd8576bd9586ada5a6ada5b69db5c68dc5d67dd5e66de5f65de6164df6263e06363e16462e26561e26660e3685fe4695ee56a5de56b5de66c5ce76e5be76f5ae87059e97158e97257ea7457eb7556eb7655ec7754ed7953ed7a52ee7b51ef7c51ef7e50f07f4ff0804ef1814df1834cf2844bf3854bf3874af48849f48948f58b47f58c46f68d45f68f44f79044f79143f79342f89441f89540f9973ff9983ef99a3efa9b3dfa9c3cfa9e3bfb9f3afba139fba238fca338fca537fca636fca835fca934fdab33fdac33fdae32fdaf31fdb130fdb22ffdb42ffdb52efeb72dfeb82cfeba2cfebb2bfebd2afebe2afec029fdc229fdc328fdc527fdc627fdc827fdca26fdcb26fccd25fcce25fcd025fcd225fbd324fbd524fbd724fad824fada24f9dc24f9dd25f8df25f8e125f7e225f7e425f6e626f6e826f5e926f5eb27f4ed27f3ee27f3f027f2f227f1f426f1f525f0f724f0f921"));

	function sequential(interpolator) {
	  var x0 = 0,
	      x1 = 1,
	      clamp = false;

	  function scale(x) {
	    var t = (x - x0) / (x1 - x0);
	    return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
	  }

	  scale.domain = function (_) {
	    return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1];
	  };

	  scale.clamp = function (_) {
	    return arguments.length ? (clamp = !!_, scale) : clamp;
	  };

	  scale.interpolator = function (_) {
	    return arguments.length ? (interpolator = _, scale) : interpolator;
	  };

	  scale.copy = function () {
	    return sequential(interpolator).domain([x0, x1]).clamp(clamp);
	  };

	  return linearish(scale);
	}

	var xhtml = "http://www.w3.org/1999/xhtml";

	var namespaces = {
	  svg: "http://www.w3.org/2000/svg",
	  xhtml: xhtml,
	  xlink: "http://www.w3.org/1999/xlink",
	  xml: "http://www.w3.org/XML/1998/namespace",
	  xmlns: "http://www.w3.org/2000/xmlns/"
	};

	function namespace (name) {
	  var prefix = name += "",
	      i = prefix.indexOf(":");
	  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
	  return namespaces.hasOwnProperty(prefix) ? { space: namespaces[prefix], local: name } : name;
	}

	function creatorInherit(name) {
	  return function () {
	    var document = this.ownerDocument,
	        uri = this.namespaceURI;
	    return uri === xhtml && document.documentElement.namespaceURI === xhtml ? document.createElement(name) : document.createElementNS(uri, name);
	  };
	}

	function creatorFixed(fullname) {
	  return function () {
	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
	  };
	}

	function creator (name) {
	  var fullname = namespace(name);
	  return (fullname.local ? creatorFixed : creatorInherit)(fullname);
	}

	var nextId = 0;

	function local() {
	  return new Local();
	}

	function Local() {
	  this._ = "@" + (++nextId).toString(36);
	}

	Local.prototype = local.prototype = {
	  constructor: Local,
	  get: function (node) {
	    var id = this._;
	    while (!(id in node)) if (!(node = node.parentNode)) return;
	    return node[id];
	  },
	  set: function (node, value) {
	    return node[this._] = value;
	  },
	  remove: function (node) {
	    return this._ in node && delete node[this._];
	  },
	  toString: function () {
	    return this._;
	  }
	};

	var matcher = function (selector) {
	  return function () {
	    return this.matches(selector);
	  };
	};

	if (typeof document !== "undefined") {
	  var element = document.documentElement;
	  if (!element.matches) {
	    var vendorMatches = element.webkitMatchesSelector || element.msMatchesSelector || element.mozMatchesSelector || element.oMatchesSelector;
	    matcher = function (selector) {
	      return function () {
	        return vendorMatches.call(this, selector);
	      };
	    };
	  }
	}

	var matcher$1 = matcher;

	var filterEvents = {};

	var event = null;

	if (typeof document !== "undefined") {
	  var element$1 = document.documentElement;
	  if (!("onmouseenter" in element$1)) {
	    filterEvents = { mouseenter: "mouseover", mouseleave: "mouseout" };
	  }
	}

	function filterContextListener(listener, index, group) {
	  listener = contextListener(listener, index, group);
	  return function (event) {
	    var related = event.relatedTarget;
	    if (!related || related !== this && !(related.compareDocumentPosition(this) & 8)) {
	      listener.call(this, event);
	    }
	  };
	}

	function contextListener(listener, index, group) {
	  return function (event1) {
	    var event0 = event; // Events can be reentrant (e.g., focus).
	    event = event1;
	    try {
	      listener.call(this, this.__data__, index, group);
	    } finally {
	      event = event0;
	    }
	  };
	}

	function parseTypenames$1(typenames) {
	  return typenames.trim().split(/^|\s+/).map(function (t) {
	    var name = "",
	        i = t.indexOf(".");
	    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
	    return { type: t, name: name };
	  });
	}

	function onRemove(typename) {
	  return function () {
	    var on = this.__on;
	    if (!on) return;
	    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
	      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
	        this.removeEventListener(o.type, o.listener, o.capture);
	      } else {
	        on[++i] = o;
	      }
	    }
	    if (++i) on.length = i;else delete this.__on;
	  };
	}

	function onAdd(typename, value, capture) {
	  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
	  return function (d, i, group) {
	    var on = this.__on,
	        o,
	        listener = wrap(value, i, group);
	    if (on) for (var j = 0, m = on.length; j < m; ++j) {
	      if ((o = on[j]).type === typename.type && o.name === typename.name) {
	        this.removeEventListener(o.type, o.listener, o.capture);
	        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
	        o.value = value;
	        return;
	      }
	    }
	    this.addEventListener(typename.type, listener, capture);
	    o = { type: typename.type, name: typename.name, value: value, listener: listener, capture: capture };
	    if (!on) this.__on = [o];else on.push(o);
	  };
	}

	function selection_on (typename, value, capture) {
	  var typenames = parseTypenames$1(typename + ""),
	      i,
	      n = typenames.length,
	      t;

	  if (arguments.length < 2) {
	    var on = this.node().__on;
	    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
	      for (i = 0, o = on[j]; i < n; ++i) {
	        if ((t = typenames[i]).type === o.type && t.name === o.name) {
	          return o.value;
	        }
	      }
	    }
	    return;
	  }

	  on = value ? onAdd : onRemove;
	  if (capture == null) capture = false;
	  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
	  return this;
	}

	function customEvent(event1, listener, that, args) {
	  var event0 = event;
	  event1.sourceEvent = event;
	  event = event1;
	  try {
	    return listener.apply(that, args);
	  } finally {
	    event = event0;
	  }
	}

	function sourceEvent () {
	  var current = event,
	      source;
	  while (source = current.sourceEvent) current = source;
	  return current;
	}

	function point$5 (node, event) {
	  var svg = node.ownerSVGElement || node;

	  if (svg.createSVGPoint) {
	    var point = svg.createSVGPoint();
	    point.x = event.clientX, point.y = event.clientY;
	    point = point.matrixTransform(node.getScreenCTM().inverse());
	    return [point.x, point.y];
	  }

	  var rect = node.getBoundingClientRect();
	  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
	}

	function mouse (node) {
	  var event = sourceEvent();
	  if (event.changedTouches) event = event.changedTouches[0];
	  return point$5(node, event);
	}

	function none$2() {}

	function selector (selector) {
	  return selector == null ? none$2 : function () {
	    return this.querySelector(selector);
	  };
	}

	function selection_select (select) {
	  if (typeof select !== "function") select = selector(select);

	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
	        if ("__data__" in node) subnode.__data__ = node.__data__;
	        subgroup[i] = subnode;
	      }
	    }
	  }

	  return new Selection(subgroups, this._parents);
	}

	function empty() {
	  return [];
	}

	function selectorAll (selector) {
	  return selector == null ? empty : function () {
	    return this.querySelectorAll(selector);
	  };
	}

	function selection_selectAll (select) {
	  if (typeof select !== "function") select = selectorAll(select);

	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
	      if (node = group[i]) {
	        subgroups.push(select.call(node, node.__data__, i, group));
	        parents.push(node);
	      }
	    }
	  }

	  return new Selection(subgroups, parents);
	}

	function selection_filter (match) {
	  if (typeof match !== "function") match = matcher$1(match);

	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
	        subgroup.push(node);
	      }
	    }
	  }

	  return new Selection(subgroups, this._parents);
	}

	function sparse (update) {
	  return new Array(update.length);
	}

	function selection_enter () {
	  return new Selection(this._enter || this._groups.map(sparse), this._parents);
	}

	function EnterNode(parent, datum) {
	  this.ownerDocument = parent.ownerDocument;
	  this.namespaceURI = parent.namespaceURI;
	  this._next = null;
	  this._parent = parent;
	  this.__data__ = datum;
	}

	EnterNode.prototype = {
	  constructor: EnterNode,
	  appendChild: function (child) {
	    return this._parent.insertBefore(child, this._next);
	  },
	  insertBefore: function (child, next) {
	    return this._parent.insertBefore(child, next);
	  },
	  querySelector: function (selector) {
	    return this._parent.querySelector(selector);
	  },
	  querySelectorAll: function (selector) {
	    return this._parent.querySelectorAll(selector);
	  }
	};

	function constant$4 (x) {
	  return function () {
	    return x;
	  };
	}

	var keyPrefix = "$"; // Protect against keys like “__proto__”.

	function bindIndex(parent, group, enter, update, exit, data) {
	  var i = 0,
	      node,
	      groupLength = group.length,
	      dataLength = data.length;

	  // Put any non-null nodes that fit into update.
	  // Put any null nodes into enter.
	  // Put any remaining data into enter.
	  for (; i < dataLength; ++i) {
	    if (node = group[i]) {
	      node.__data__ = data[i];
	      update[i] = node;
	    } else {
	      enter[i] = new EnterNode(parent, data[i]);
	    }
	  }

	  // Put any non-null nodes that don’t fit into exit.
	  for (; i < groupLength; ++i) {
	    if (node = group[i]) {
	      exit[i] = node;
	    }
	  }
	}

	function bindKey(parent, group, enter, update, exit, data, key) {
	  var i,
	      node,
	      nodeByKeyValue = {},
	      groupLength = group.length,
	      dataLength = data.length,
	      keyValues = new Array(groupLength),
	      keyValue;

	  // Compute the key for each node.
	  // If multiple nodes have the same key, the duplicates are added to exit.
	  for (i = 0; i < groupLength; ++i) {
	    if (node = group[i]) {
	      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
	      if (keyValue in nodeByKeyValue) {
	        exit[i] = node;
	      } else {
	        nodeByKeyValue[keyValue] = node;
	      }
	    }
	  }

	  // Compute the key for each datum.
	  // If there a node associated with this key, join and add it to update.
	  // If there is not (or the key is a duplicate), add it to enter.
	  for (i = 0; i < dataLength; ++i) {
	    keyValue = keyPrefix + key.call(parent, data[i], i, data);
	    if (node = nodeByKeyValue[keyValue]) {
	      update[i] = node;
	      node.__data__ = data[i];
	      nodeByKeyValue[keyValue] = null;
	    } else {
	      enter[i] = new EnterNode(parent, data[i]);
	    }
	  }

	  // Add any remaining nodes that were not bound to data to exit.
	  for (i = 0; i < groupLength; ++i) {
	    if ((node = group[i]) && nodeByKeyValue[keyValues[i]] === node) {
	      exit[i] = node;
	    }
	  }
	}

	function selection_data (value, key) {
	  if (!value) {
	    data = new Array(this.size()), j = -1;
	    this.each(function (d) {
	      data[++j] = d;
	    });
	    return data;
	  }

	  var bind = key ? bindKey : bindIndex,
	      parents = this._parents,
	      groups = this._groups;

	  if (typeof value !== "function") value = constant$4(value);

	  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
	    var parent = parents[j],
	        group = groups[j],
	        groupLength = group.length,
	        data = value.call(parent, parent && parent.__data__, j, parents),
	        dataLength = data.length,
	        enterGroup = enter[j] = new Array(dataLength),
	        updateGroup = update[j] = new Array(dataLength),
	        exitGroup = exit[j] = new Array(groupLength);

	    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);

	    // Now connect the enter nodes to their following update node, such that
	    // appendChild can insert the materialized enter node before this node,
	    // rather than at the end of the parent node.
	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
	      if (previous = enterGroup[i0]) {
	        if (i0 >= i1) i1 = i0 + 1;
	        while (!(next = updateGroup[i1]) && ++i1 < dataLength);
	        previous._next = next || null;
	      }
	    }
	  }

	  update = new Selection(update, parents);
	  update._enter = enter;
	  update._exit = exit;
	  return update;
	}

	function selection_exit () {
	  return new Selection(this._exit || this._groups.map(sparse), this._parents);
	}

	function selection_merge (selection) {

	  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
	      if (node = group0[i] || group1[i]) {
	        merge[i] = node;
	      }
	    }
	  }

	  for (; j < m0; ++j) {
	    merges[j] = groups0[j];
	  }

	  return new Selection(merges, this._parents);
	}

	function selection_order () {

	  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
	    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
	      if (node = group[i]) {
	        if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
	        next = node;
	      }
	    }
	  }

	  return this;
	}

	function selection_sort (compare) {
	  if (!compare) compare = ascending$2;

	  function compareNode(a, b) {
	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
	  }

	  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
	      if (node = group[i]) {
	        sortgroup[i] = node;
	      }
	    }
	    sortgroup.sort(compareNode);
	  }

	  return new Selection(sortgroups, this._parents).order();
	}

	function ascending$2(a, b) {
	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
	}

	function selection_call () {
	  var callback = arguments[0];
	  arguments[0] = this;
	  callback.apply(null, arguments);
	  return this;
	}

	function selection_nodes () {
	  var nodes = new Array(this.size()),
	      i = -1;
	  this.each(function () {
	    nodes[++i] = this;
	  });
	  return nodes;
	}

	function selection_node () {

	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
	    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
	      var node = group[i];
	      if (node) return node;
	    }
	  }

	  return null;
	}

	function selection_size () {
	  var size = 0;
	  this.each(function () {
	    ++size;
	  });
	  return size;
	}

	function selection_empty () {
	  return !this.node();
	}

	function selection_each (callback) {

	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
	    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
	      if (node = group[i]) callback.call(node, node.__data__, i, group);
	    }
	  }

	  return this;
	}

	function attrRemove(name) {
	  return function () {
	    this.removeAttribute(name);
	  };
	}

	function attrRemoveNS(fullname) {
	  return function () {
	    this.removeAttributeNS(fullname.space, fullname.local);
	  };
	}

	function attrConstant(name, value) {
	  return function () {
	    this.setAttribute(name, value);
	  };
	}

	function attrConstantNS(fullname, value) {
	  return function () {
	    this.setAttributeNS(fullname.space, fullname.local, value);
	  };
	}

	function attrFunction(name, value) {
	  return function () {
	    var v = value.apply(this, arguments);
	    if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
	  };
	}

	function attrFunctionNS(fullname, value) {
	  return function () {
	    var v = value.apply(this, arguments);
	    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);else this.setAttributeNS(fullname.space, fullname.local, v);
	  };
	}

	function selection_attr (name, value) {
	  var fullname = namespace(name);

	  if (arguments.length < 2) {
	    var node = this.node();
	    return fullname.local ? node.getAttributeNS(fullname.space, fullname.local) : node.getAttribute(fullname);
	  }

	  return this.each((value == null ? fullname.local ? attrRemoveNS : attrRemove : typeof value === "function" ? fullname.local ? attrFunctionNS : attrFunction : fullname.local ? attrConstantNS : attrConstant)(fullname, value));
	}

	function window$1 (node) {
	    return node.ownerDocument && node.ownerDocument.defaultView || // node is a Node
	    node.document && node // node is a Window
	    || node.defaultView; // node is a Document
	}

	function styleRemove(name) {
	  return function () {
	    this.style.removeProperty(name);
	  };
	}

	function styleConstant(name, value, priority) {
	  return function () {
	    this.style.setProperty(name, value, priority);
	  };
	}

	function styleFunction(name, value, priority) {
	  return function () {
	    var v = value.apply(this, arguments);
	    if (v == null) this.style.removeProperty(name);else this.style.setProperty(name, v, priority);
	  };
	}

	function selection_style (name, value, priority) {
	  var node;
	  return arguments.length > 1 ? this.each((value == null ? styleRemove : typeof value === "function" ? styleFunction : styleConstant)(name, value, priority == null ? "" : priority)) : window$1(node = this.node()).getComputedStyle(node, null).getPropertyValue(name);
	}

	function propertyRemove(name) {
	  return function () {
	    delete this[name];
	  };
	}

	function propertyConstant(name, value) {
	  return function () {
	    this[name] = value;
	  };
	}

	function propertyFunction(name, value) {
	  return function () {
	    var v = value.apply(this, arguments);
	    if (v == null) delete this[name];else this[name] = v;
	  };
	}

	function selection_property (name, value) {
	  return arguments.length > 1 ? this.each((value == null ? propertyRemove : typeof value === "function" ? propertyFunction : propertyConstant)(name, value)) : this.node()[name];
	}

	function classArray(string) {
	  return string.trim().split(/^|\s+/);
	}

	function classList(node) {
	  return node.classList || new ClassList(node);
	}

	function ClassList(node) {
	  this._node = node;
	  this._names = classArray(node.getAttribute("class") || "");
	}

	ClassList.prototype = {
	  add: function (name) {
	    var i = this._names.indexOf(name);
	    if (i < 0) {
	      this._names.push(name);
	      this._node.setAttribute("class", this._names.join(" "));
	    }
	  },
	  remove: function (name) {
	    var i = this._names.indexOf(name);
	    if (i >= 0) {
	      this._names.splice(i, 1);
	      this._node.setAttribute("class", this._names.join(" "));
	    }
	  },
	  contains: function (name) {
	    return this._names.indexOf(name) >= 0;
	  }
	};

	function classedAdd(node, names) {
	  var list = classList(node),
	      i = -1,
	      n = names.length;
	  while (++i < n) list.add(names[i]);
	}

	function classedRemove(node, names) {
	  var list = classList(node),
	      i = -1,
	      n = names.length;
	  while (++i < n) list.remove(names[i]);
	}

	function classedTrue(names) {
	  return function () {
	    classedAdd(this, names);
	  };
	}

	function classedFalse(names) {
	  return function () {
	    classedRemove(this, names);
	  };
	}

	function classedFunction(names, value) {
	  return function () {
	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
	  };
	}

	function selection_classed (name, value) {
	  var names = classArray(name + "");

	  if (arguments.length < 2) {
	    var list = classList(this.node()),
	        i = -1,
	        n = names.length;
	    while (++i < n) if (!list.contains(names[i])) return false;
	    return true;
	  }

	  return this.each((typeof value === "function" ? classedFunction : value ? classedTrue : classedFalse)(names, value));
	}

	function textRemove() {
	  this.textContent = "";
	}

	function textConstant(value) {
	  return function () {
	    this.textContent = value;
	  };
	}

	function textFunction(value) {
	  return function () {
	    var v = value.apply(this, arguments);
	    this.textContent = v == null ? "" : v;
	  };
	}

	function selection_text (value) {
	  return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction : textConstant)(value)) : this.node().textContent;
	}

	function htmlRemove() {
	  this.innerHTML = "";
	}

	function htmlConstant(value) {
	  return function () {
	    this.innerHTML = value;
	  };
	}

	function htmlFunction(value) {
	  return function () {
	    var v = value.apply(this, arguments);
	    this.innerHTML = v == null ? "" : v;
	  };
	}

	function selection_html (value) {
	  return arguments.length ? this.each(value == null ? htmlRemove : (typeof value === "function" ? htmlFunction : htmlConstant)(value)) : this.node().innerHTML;
	}

	function raise$1() {
	  if (this.nextSibling) this.parentNode.appendChild(this);
	}

	function selection_raise () {
	  return this.each(raise$1);
	}

	function lower() {
	  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
	}

	function selection_lower () {
	  return this.each(lower);
	}

	function selection_append (name) {
	  var create = typeof name === "function" ? name : creator(name);
	  return this.select(function () {
	    return this.appendChild(create.apply(this, arguments));
	  });
	}

	function constantNull() {
	  return null;
	}

	function selection_insert (name, before) {
	  var create = typeof name === "function" ? name : creator(name),
	      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
	  return this.select(function () {
	    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
	  });
	}

	function remove() {
	  var parent = this.parentNode;
	  if (parent) parent.removeChild(this);
	}

	function selection_remove () {
	  return this.each(remove);
	}

	function selection_datum (value) {
	    return arguments.length ? this.property("__data__", value) : this.node().__data__;
	}

	function dispatchEvent(node, type, params) {
	  var window = window$1(node),
	      event = window.CustomEvent;

	  if (event) {
	    event = new event(type, params);
	  } else {
	    event = window.document.createEvent("Event");
	    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;else event.initEvent(type, false, false);
	  }

	  node.dispatchEvent(event);
	}

	function dispatchConstant(type, params) {
	  return function () {
	    return dispatchEvent(this, type, params);
	  };
	}

	function dispatchFunction(type, params) {
	  return function () {
	    return dispatchEvent(this, type, params.apply(this, arguments));
	  };
	}

	function selection_dispatch (type, params) {
	  return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
	}

	var root = [null];

	function Selection(groups, parents) {
	  this._groups = groups;
	  this._parents = parents;
	}

	function selection() {
	  return new Selection([[document.documentElement]], root);
	}

	Selection.prototype = selection.prototype = {
	  constructor: Selection,
	  select: selection_select,
	  selectAll: selection_selectAll,
	  filter: selection_filter,
	  data: selection_data,
	  enter: selection_enter,
	  exit: selection_exit,
	  merge: selection_merge,
	  order: selection_order,
	  sort: selection_sort,
	  call: selection_call,
	  nodes: selection_nodes,
	  node: selection_node,
	  size: selection_size,
	  empty: selection_empty,
	  each: selection_each,
	  attr: selection_attr,
	  style: selection_style,
	  property: selection_property,
	  classed: selection_classed,
	  text: selection_text,
	  html: selection_html,
	  raise: selection_raise,
	  lower: selection_lower,
	  append: selection_append,
	  insert: selection_insert,
	  remove: selection_remove,
	  datum: selection_datum,
	  on: selection_on,
	  dispatch: selection_dispatch
	};

	function select (selector) {
	    return typeof selector === "string" ? new Selection([[document.querySelector(selector)]], [document.documentElement]) : new Selection([[selector]], root);
	}

	function selectAll (selector) {
	    return typeof selector === "string" ? new Selection([document.querySelectorAll(selector)], [document.documentElement]) : new Selection([selector == null ? [] : selector], root);
	}

	function touch (node, touches, identifier) {
	  if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;

	  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
	    if ((touch = touches[i]).identifier === identifier) {
	      return point$5(node, touch);
	    }
	  }

	  return null;
	}

	function touches (node, touches) {
	  if (touches == null) touches = sourceEvent().touches;

	  for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
	    points[i] = point$5(node, touches[i]);
	  }

	  return points;
	}

	var emptyOn = dispatch("start", "end", "interrupt");
	var emptyTween = [];

	var CREATED = 0;
	var SCHEDULED = 1;
	var STARTING = 2;
	var STARTED = 3;
	var RUNNING = 4;
	var ENDING = 5;
	var ENDED = 6;

	function schedule (node, name, id, index, group, timing) {
	  var schedules = node.__transition;
	  if (!schedules) node.__transition = {};else if (id in schedules) return;
	  create(node, id, {
	    name: name,
	    index: index, // For context during callback.
	    group: group, // For context during callback.
	    on: emptyOn,
	    tween: emptyTween,
	    time: timing.time,
	    delay: timing.delay,
	    duration: timing.duration,
	    ease: timing.ease,
	    timer: null,
	    state: CREATED
	  });
	}

	function init(node, id) {
	  var schedule = node.__transition;
	  if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late");
	  return schedule;
	}

	function set$2(node, id) {
	  var schedule = node.__transition;
	  if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late");
	  return schedule;
	}

	function get$1(node, id) {
	  var schedule = node.__transition;
	  if (!schedule || !(schedule = schedule[id])) throw new Error("too late");
	  return schedule;
	}

	function create(node, id, self) {
	  var schedules = node.__transition,
	      tween;

	  // Initialize the self timer when the transition is created.
	  // Note the actual delay is not known until the first callback!
	  schedules[id] = self;
	  self.timer = timer(schedule, 0, self.time);

	  function schedule(elapsed) {
	    self.state = SCHEDULED;
	    self.timer.restart(start, self.delay, self.time);

	    // If the elapsed delay is less than our first sleep, start immediately.
	    if (self.delay <= elapsed) start(elapsed - self.delay);
	  }

	  function start(elapsed) {
	    var i, j, n, o;

	    // If the state is not SCHEDULED, then we previously errored on start.
	    if (self.state !== SCHEDULED) return stop();

	    for (i in schedules) {
	      o = schedules[i];
	      if (o.name !== self.name) continue;

	      // While this element already has a starting transition during this frame,
	      // defer starting an interrupting transition until that transition has a
	      // chance to tick (and possibly end); see d3/d3-transition#54!
	      if (o.state === STARTED) return timeout$1(start);

	      // Interrupt the active transition, if any.
	      // Dispatch the interrupt event.
	      if (o.state === RUNNING) {
	        o.state = ENDED;
	        o.timer.stop();
	        o.on.call("interrupt", node, node.__data__, o.index, o.group);
	        delete schedules[i];
	      }

	      // Cancel any pre-empted transitions. No interrupt event is dispatched
	      // because the cancelled transitions never started. Note that this also
	      // removes this transition from the pending list!
	      else if (+i < id) {
	          o.state = ENDED;
	          o.timer.stop();
	          delete schedules[i];
	        }
	    }

	    // Defer the first tick to end of the current frame; see d3/d3#1576.
	    // Note the transition may be canceled after start and before the first tick!
	    // Note this must be scheduled before the start event; see d3/d3-transition#16!
	    // Assuming this is successful, subsequent callbacks go straight to tick.
	    timeout$1(function () {
	      if (self.state === STARTED) {
	        self.state = RUNNING;
	        self.timer.restart(tick, self.delay, self.time);
	        tick(elapsed);
	      }
	    });

	    // Dispatch the start event.
	    // Note this must be done before the tween are initialized.
	    self.state = STARTING;
	    self.on.call("start", node, node.__data__, self.index, self.group);
	    if (self.state !== STARTING) return; // interrupted
	    self.state = STARTED;

	    // Initialize the tween, deleting null tween.
	    tween = new Array(n = self.tween.length);
	    for (i = 0, j = -1; i < n; ++i) {
	      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
	        tween[++j] = o;
	      }
	    }
	    tween.length = j + 1;
	  }

	  function tick(elapsed) {
	    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
	        i = -1,
	        n = tween.length;

	    while (++i < n) {
	      tween[i].call(null, t);
	    }

	    // Dispatch the end event.
	    if (self.state === ENDING) {
	      self.on.call("end", node, node.__data__, self.index, self.group);
	      stop();
	    }
	  }

	  function stop() {
	    self.state = ENDED;
	    self.timer.stop();
	    delete schedules[id];
	    for (var i in schedules) return; // eslint-disable-line no-unused-vars
	    delete node.__transition;
	  }
	}

	function interrupt (node, name) {
	  var schedules = node.__transition,
	      schedule,
	      active,
	      empty = true,
	      i;

	  if (!schedules) return;

	  name = name == null ? null : name + "";

	  for (i in schedules) {
	    if ((schedule = schedules[i]).name !== name) {
	      empty = false;continue;
	    }
	    active = schedule.state === STARTED;
	    schedule.state = ENDED;
	    schedule.timer.stop();
	    if (active) schedule.on.call("interrupt", node, node.__data__, schedule.index, schedule.group);
	    delete schedules[i];
	  }

	  if (empty) delete node.__transition;
	}

	function selection_interrupt (name) {
	  return this.each(function () {
	    interrupt(this, name);
	  });
	}

	function tweenRemove(id, name) {
	  var tween0, tween1;
	  return function () {
	    var schedule = set$2(this, id),
	        tween = schedule.tween;

	    // If this node shared tween with the previous node,
	    // just assign the updated shared tween and we’re done!
	    // Otherwise, copy-on-write.
	    if (tween !== tween0) {
	      tween1 = tween0 = tween;
	      for (var i = 0, n = tween1.length; i < n; ++i) {
	        if (tween1[i].name === name) {
	          tween1 = tween1.slice();
	          tween1.splice(i, 1);
	          break;
	        }
	      }
	    }

	    schedule.tween = tween1;
	  };
	}

	function tweenFunction(id, name, value) {
	  var tween0, tween1;
	  if (typeof value !== "function") throw new Error();
	  return function () {
	    var schedule = set$2(this, id),
	        tween = schedule.tween;

	    // If this node shared tween with the previous node,
	    // just assign the updated shared tween and we’re done!
	    // Otherwise, copy-on-write.
	    if (tween !== tween0) {
	      tween1 = (tween0 = tween).slice();
	      for (var t = { name: name, value: value }, i = 0, n = tween1.length; i < n; ++i) {
	        if (tween1[i].name === name) {
	          tween1[i] = t;
	          break;
	        }
	      }
	      if (i === n) tween1.push(t);
	    }

	    schedule.tween = tween1;
	  };
	}

	function transition_tween (name, value) {
	  var id = this._id;

	  name += "";

	  if (arguments.length < 2) {
	    var tween = get$1(this.node(), id).tween;
	    for (var i = 0, n = tween.length, t; i < n; ++i) {
	      if ((t = tween[i]).name === name) {
	        return t.value;
	      }
	    }
	    return null;
	  }

	  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
	}

	function tweenValue(transition, name, value) {
	  var id = transition._id;

	  transition.each(function () {
	    var schedule = set$2(this, id);
	    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
	  });

	  return function (node) {
	    return get$1(node, id).value[name];
	  };
	}

	function interpolate$1 (a, b) {
	    var c;
	    return (typeof b === "number" ? interpolateNumber : b instanceof color ? interpolateRgb : (c = color(b)) ? (b = c, interpolateRgb) : interpolateString)(a, b);
	}

	function attrRemove$1(name) {
	  return function () {
	    this.removeAttribute(name);
	  };
	}

	function attrRemoveNS$1(fullname) {
	  return function () {
	    this.removeAttributeNS(fullname.space, fullname.local);
	  };
	}

	function attrConstant$1(name, interpolate, value1) {
	  var value00, interpolate0;
	  return function () {
	    var value0 = this.getAttribute(name);
	    return value0 === value1 ? null : value0 === value00 ? interpolate0 : interpolate0 = interpolate(value00 = value0, value1);
	  };
	}

	function attrConstantNS$1(fullname, interpolate, value1) {
	  var value00, interpolate0;
	  return function () {
	    var value0 = this.getAttributeNS(fullname.space, fullname.local);
	    return value0 === value1 ? null : value0 === value00 ? interpolate0 : interpolate0 = interpolate(value00 = value0, value1);
	  };
	}

	function attrFunction$1(name, interpolate, value) {
	  var value00, value10, interpolate0;
	  return function () {
	    var value0,
	        value1 = value(this);
	    if (value1 == null) return void this.removeAttribute(name);
	    value0 = this.getAttribute(name);
	    return value0 === value1 ? null : value0 === value00 && value1 === value10 ? interpolate0 : interpolate0 = interpolate(value00 = value0, value10 = value1);
	  };
	}

	function attrFunctionNS$1(fullname, interpolate, value) {
	  var value00, value10, interpolate0;
	  return function () {
	    var value0,
	        value1 = value(this);
	    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
	    value0 = this.getAttributeNS(fullname.space, fullname.local);
	    return value0 === value1 ? null : value0 === value00 && value1 === value10 ? interpolate0 : interpolate0 = interpolate(value00 = value0, value10 = value1);
	  };
	}

	function transition_attr (name, value) {
	  var fullname = namespace(name),
	      i = fullname === "transform" ? interpolateTransform$2 : interpolate$1;
	  return this.attrTween(name, typeof value === "function" ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value)) : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname) : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
	}

	function attrTweenNS(fullname, value) {
	  function tween() {
	    var node = this,
	        i = value.apply(node, arguments);
	    return i && function (t) {
	      node.setAttributeNS(fullname.space, fullname.local, i(t));
	    };
	  }
	  tween._value = value;
	  return tween;
	}

	function attrTween(name, value) {
	  function tween() {
	    var node = this,
	        i = value.apply(node, arguments);
	    return i && function (t) {
	      node.setAttribute(name, i(t));
	    };
	  }
	  tween._value = value;
	  return tween;
	}

	function transition_attrTween (name, value) {
	  var key = "attr." + name;
	  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
	  if (value == null) return this.tween(key, null);
	  if (typeof value !== "function") throw new Error();
	  var fullname = namespace(name);
	  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
	}

	function delayFunction(id, value) {
	  return function () {
	    init(this, id).delay = +value.apply(this, arguments);
	  };
	}

	function delayConstant(id, value) {
	  return value = +value, function () {
	    init(this, id).delay = value;
	  };
	}

	function transition_delay (value) {
	  var id = this._id;

	  return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$1(this.node(), id).delay;
	}

	function durationFunction(id, value) {
	  return function () {
	    set$2(this, id).duration = +value.apply(this, arguments);
	  };
	}

	function durationConstant(id, value) {
	  return value = +value, function () {
	    set$2(this, id).duration = value;
	  };
	}

	function transition_duration (value) {
	  var id = this._id;

	  return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$1(this.node(), id).duration;
	}

	function easeConstant(id, value) {
	  if (typeof value !== "function") throw new Error();
	  return function () {
	    set$2(this, id).ease = value;
	  };
	}

	function transition_ease (value) {
	  var id = this._id;

	  return arguments.length ? this.each(easeConstant(id, value)) : get$1(this.node(), id).ease;
	}

	function transition_filter (match) {
	  if (typeof match !== "function") match = matcher$1(match);

	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
	        subgroup.push(node);
	      }
	    }
	  }

	  return new Transition(subgroups, this._parents, this._name, this._id);
	}

	function transition_merge (transition) {
	  if (transition._id !== this._id) throw new Error();

	  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
	      if (node = group0[i] || group1[i]) {
	        merge[i] = node;
	      }
	    }
	  }

	  for (; j < m0; ++j) {
	    merges[j] = groups0[j];
	  }

	  return new Transition(merges, this._parents, this._name, this._id);
	}

	function start$1(name) {
	  return (name + "").trim().split(/^|\s+/).every(function (t) {
	    var i = t.indexOf(".");
	    if (i >= 0) t = t.slice(0, i);
	    return !t || t === "start";
	  });
	}

	function onFunction(id, name, listener) {
	  var on0,
	      on1,
	      sit = start$1(name) ? init : set$2;
	  return function () {
	    var schedule = sit(this, id),
	        on = schedule.on;

	    // If this node shared a dispatch with the previous node,
	    // just assign the updated shared dispatch and we’re done!
	    // Otherwise, copy-on-write.
	    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);

	    schedule.on = on1;
	  };
	}

	function transition_on (name, listener) {
	  var id = this._id;

	  return arguments.length < 2 ? get$1(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
	}

	function removeFunction(id) {
	  return function () {
	    var parent = this.parentNode;
	    for (var i in this.__transition) if (+i !== id) return;
	    if (parent) parent.removeChild(this);
	  };
	}

	function transition_remove () {
	  return this.on("end.remove", removeFunction(this._id));
	}

	function transition_select (select) {
	  var name = this._name,
	      id = this._id;

	  if (typeof select !== "function") select = selector(select);

	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
	        if ("__data__" in node) subnode.__data__ = node.__data__;
	        subgroup[i] = subnode;
	        schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
	      }
	    }
	  }

	  return new Transition(subgroups, this._parents, name, id);
	}

	function transition_selectAll (select) {
	  var name = this._name,
	      id = this._id;

	  if (typeof select !== "function") select = selectorAll(select);

	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
	      if (node = group[i]) {
	        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
	          if (child = children[k]) {
	            schedule(child, name, id, k, children, inherit);
	          }
	        }
	        subgroups.push(children);
	        parents.push(node);
	      }
	    }
	  }

	  return new Transition(subgroups, parents, name, id);
	}

	var Selection$1 = selection.prototype.constructor;

	function transition_selection () {
	  return new Selection$1(this._groups, this._parents);
	}

	function styleRemove$1(name, interpolate) {
	    var value00, value10, interpolate0;
	    return function () {
	        var style = window$1(this).getComputedStyle(this, null),
	            value0 = style.getPropertyValue(name),
	            value1 = (this.style.removeProperty(name), style.getPropertyValue(name));
	        return value0 === value1 ? null : value0 === value00 && value1 === value10 ? interpolate0 : interpolate0 = interpolate(value00 = value0, value10 = value1);
	    };
	}

	function styleRemoveEnd(name) {
	    return function () {
	        this.style.removeProperty(name);
	    };
	}

	function styleConstant$1(name, interpolate, value1) {
	    var value00, interpolate0;
	    return function () {
	        var value0 = window$1(this).getComputedStyle(this, null).getPropertyValue(name);
	        return value0 === value1 ? null : value0 === value00 ? interpolate0 : interpolate0 = interpolate(value00 = value0, value1);
	    };
	}

	function styleFunction$1(name, interpolate, value) {
	    var value00, value10, interpolate0;
	    return function () {
	        var style = window$1(this).getComputedStyle(this, null),
	            value0 = style.getPropertyValue(name),
	            value1 = value(this);
	        if (value1 == null) value1 = (this.style.removeProperty(name), style.getPropertyValue(name));
	        return value0 === value1 ? null : value0 === value00 && value1 === value10 ? interpolate0 : interpolate0 = interpolate(value00 = value0, value10 = value1);
	    };
	}

	function transition_style (name, value, priority) {
	    var i = (name += "") === "transform" ? interpolateTransform$1 : interpolate$1;
	    return value == null ? this.styleTween(name, styleRemove$1(name, i)).on("end.style." + name, styleRemoveEnd(name)) : this.styleTween(name, typeof value === "function" ? styleFunction$1(name, i, tweenValue(this, "style." + name, value)) : styleConstant$1(name, i, value), priority);
	}

	function styleTween(name, value, priority) {
	  function tween() {
	    var node = this,
	        i = value.apply(node, arguments);
	    return i && function (t) {
	      node.style.setProperty(name, i(t), priority);
	    };
	  }
	  tween._value = value;
	  return tween;
	}

	function transition_styleTween (name, value, priority) {
	  var key = "style." + (name += "");
	  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
	  if (value == null) return this.tween(key, null);
	  if (typeof value !== "function") throw new Error();
	  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
	}

	function textConstant$1(value) {
	  return function () {
	    this.textContent = value;
	  };
	}

	function textFunction$1(value) {
	  return function () {
	    var value1 = value(this);
	    this.textContent = value1 == null ? "" : value1;
	  };
	}

	function transition_text (value) {
	  return this.tween("text", typeof value === "function" ? textFunction$1(tweenValue(this, "text", value)) : textConstant$1(value == null ? "" : value + ""));
	}

	function transition_transition () {
	  var name = this._name,
	      id0 = this._id,
	      id1 = newId();

	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
	      if (node = group[i]) {
	        var inherit = get$1(node, id0);
	        schedule(node, name, id1, i, group, {
	          time: inherit.time + inherit.delay + inherit.duration,
	          delay: 0,
	          duration: inherit.duration,
	          ease: inherit.ease
	        });
	      }
	    }
	  }

	  return new Transition(groups, this._parents, name, id1);
	}

	var id = 0;

	function Transition(groups, parents, name, id) {
	  this._groups = groups;
	  this._parents = parents;
	  this._name = name;
	  this._id = id;
	}

	function transition(name) {
	  return selection().transition(name);
	}

	function newId() {
	  return ++id;
	}

	var selection_prototype = selection.prototype;

	Transition.prototype = transition.prototype = {
	  constructor: Transition,
	  select: transition_select,
	  selectAll: transition_selectAll,
	  filter: transition_filter,
	  merge: transition_merge,
	  selection: transition_selection,
	  transition: transition_transition,
	  call: selection_prototype.call,
	  nodes: selection_prototype.nodes,
	  node: selection_prototype.node,
	  size: selection_prototype.size,
	  empty: selection_prototype.empty,
	  each: selection_prototype.each,
	  on: transition_on,
	  attr: transition_attr,
	  attrTween: transition_attrTween,
	  style: transition_style,
	  styleTween: transition_styleTween,
	  text: transition_text,
	  remove: transition_remove,
	  tween: transition_tween,
	  delay: transition_delay,
	  duration: transition_duration,
	  ease: transition_ease
	};

	var defaultTiming = {
	  time: null, // Set on use.
	  delay: 0,
	  duration: 250,
	  ease: easeCubicInOut
	};

	function inherit(node, id) {
	  var timing;
	  while (!(timing = node.__transition) || !(timing = timing[id])) {
	    if (!(node = node.parentNode)) {
	      return defaultTiming.time = now(), defaultTiming;
	    }
	  }
	  return timing;
	}

	function selection_transition (name) {
	  var id, timing;

	  if (name instanceof Transition) {
	    id = name._id, name = name._name;
	  } else {
	    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
	  }

	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
	      if (node = group[i]) {
	        schedule(node, name, id, i, group, timing || inherit(node, id));
	      }
	    }
	  }

	  return new Transition(groups, this._parents, name, id);
	}

	selection.prototype.interrupt = selection_interrupt;
	selection.prototype.transition = selection_transition;

	var root$1 = [null];

	function active (node, name) {
	  var schedules = node.__transition,
	      schedule,
	      i;

	  if (schedules) {
	    name = name == null ? null : name + "";
	    for (i in schedules) {
	      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {
	        return new Transition([[node]], root$1, name, +i);
	      }
	    }
	  }

	  return null;
	}

	var slice$4 = Array.prototype.slice;

	function identity$5 (x) {
	  return x;
	}

	var top = 1;
	var right = 2;
	var bottom = 3;
	var left = 4;
var 	epsilon$2 = 1e-6;
	function translateX(scale0, scale1, d) {
	  var x = scale0(d);
	  return "translate(" + (isFinite(x) ? x : scale1(d)) + ",0)";
	}

	function translateY(scale0, scale1, d) {
	  var y = scale0(d);
	  return "translate(0," + (isFinite(y) ? y : scale1(d)) + ")";
	}

	function center(scale) {
	  var offset = scale.bandwidth() / 2;
	  if (scale.round()) offset = Math.round(offset);
	  return function (d) {
	    return scale(d) + offset;
	  };
	}

	function entering() {
	  return !this.__axis;
	}

	function axis(orient, scale) {
	  var tickArguments = [],
	      tickValues = null,
	      tickFormat = null,
	      tickSizeInner = 6,
	      tickSizeOuter = 6,
	      tickPadding = 3;

	  function axis(context) {
	    var values = tickValues == null ? scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain() : tickValues,
	        format = tickFormat == null ? scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$5 : tickFormat,
	        spacing = Math.max(tickSizeInner, 0) + tickPadding,
	        transform = orient === top || orient === bottom ? translateX : translateY,
	        range = scale.range(),
	        range0 = range[0] + 0.5,
	        range1 = range[range.length - 1] + 0.5,
	        position = (scale.bandwidth ? center : identity$5)(scale.copy()),
	        selection = context.selection ? context.selection() : context,
	        path = selection.selectAll(".domain").data([null]),
	        tick = selection.selectAll(".tick").data(values, scale).order(),
	        tickExit = tick.exit(),
	        tickEnter = tick.enter().append("g").attr("class", "tick"),
	        line = tick.select("line"),
	        text = tick.select("text"),
	        k = orient === top || orient === left ? -1 : 1,
	        x,
	        y = orient === left || orient === right ? (x = "x", "y") : (x = "y", "x");

	    path = path.merge(path.enter().insert("path", ".tick").attr("class", "domain").attr("stroke", "#000"));

	    tick = tick.merge(tickEnter);

	    line = line.merge(tickEnter.append("line").attr("stroke", "#000").attr(x + "2", k * tickSizeInner).attr(y + "1", 0.5).attr(y + "2", 0.5));

	    text = text.merge(tickEnter.append("text").attr("fill", "#000").attr(x, k * spacing).attr(y, 0.5).attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em"));

	    if (context !== selection) {
	      path = path.transition(context);
	      tick = tick.transition(context);
	      line = line.transition(context);
	      text = text.transition(context);

	      tickExit = tickExit.transition(context).attr("opacity", epsilon$2).attr("transform", function (d) {
	        return transform(position, this.parentNode.__axis || position, d);
	      });

	      tickEnter.attr("opacity", epsilon$2).attr("transform", function (d) {
	        return transform(this.parentNode.__axis || position, position, d);
	      });
	    }

	    tickExit.remove();

	    path.attr("d", orient === left || orient == right ? "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter : "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter);

	    tick.attr("opacity", 1).attr("transform", function (d) {
	      return transform(position, position, d);
	    });

	    line.attr(x + "2", k * tickSizeInner);

	    text.attr(x, k * spacing).text(format);

	    selection.filter(entering).attr("fill", "none").attr("font-size", 10).attr("font-family", "sans-serif").attr("text-anchor", orient === right ? "start" : orient === left ? "end" : "middle");

	    selection.each(function () {
	      this.__axis = position;
	    });
	  }

	  axis.scale = function (_) {
	    return arguments.length ? (scale = _, axis) : scale;
	  };

	  axis.ticks = function () {
	    return tickArguments = slice$4.call(arguments), axis;
	  };

	  axis.tickArguments = function (_) {
	    return arguments.length ? (tickArguments = _ == null ? [] : slice$4.call(_), axis) : tickArguments.slice();
	  };

	  axis.tickValues = function (_) {
	    return arguments.length ? (tickValues = _ == null ? null : slice$4.call(_), axis) : tickValues && tickValues.slice();
	  };

	  axis.tickFormat = function (_) {
	    return arguments.length ? (tickFormat = _, axis) : tickFormat;
	  };

	  axis.tickSize = function (_) {
	    return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;
	  };

	  axis.tickSizeInner = function (_) {
	    return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;
	  };

	  axis.tickSizeOuter = function (_) {
	    return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;
	  };

	  axis.tickPadding = function (_) {
	    return arguments.length ? (tickPadding = +_, axis) : tickPadding;
	  };

	  return axis;
	}

	function axisTop(scale) {
	  return axis(top, scale);
	}

	function axisRight(scale) {
	  return axis(right, scale);
	}

	function axisBottom(scale) {
	  return axis(bottom, scale);
	}

	function axisLeft(scale) {
	  return axis(left, scale);
	}

	function defaultSeparation(a, b) {
	  return a.parent === b.parent ? 1 : 2;
	}

	function meanX(children) {
	  return children.reduce(meanXReduce, 0) / children.length;
	}

	function meanXReduce(x, c) {
	  return x + c.x;
	}

	function maxY(children) {
	  return 1 + children.reduce(maxYReduce, 0);
	}

	function maxYReduce(y, c) {
	  return Math.max(y, c.y);
	}

	function leafLeft(node) {
	  var children;
	  while (children = node.children) node = children[0];
	  return node;
	}

	function leafRight(node) {
	  var children;
	  while (children = node.children) node = children[children.length - 1];
	  return node;
	}

	function cluster () {
	  var separation = defaultSeparation,
	      dx = 1,
	      dy = 1,
	      nodeSize = false;

	  function cluster(root) {
	    var previousNode,
	        x = 0;

	    // First walk, computing the initial x & y values.
	    root.eachAfter(function (node) {
	      var children = node.children;
	      if (children) {
	        node.x = meanX(children);
	        node.y = maxY(children);
	      } else {
	        node.x = previousNode ? x += separation(node, previousNode) : 0;
	        node.y = 0;
	        previousNode = node;
	      }
	    });

	    var left = leafLeft(root),
	        right = leafRight(root),
	        x0 = left.x - separation(left, right) / 2,
	        x1 = right.x + separation(right, left) / 2;

	    // Second walk, normalizing x & y to the desired size.
	    return root.eachAfter(nodeSize ? function (node) {
	      node.x = (node.x - root.x) * dx;
	      node.y = (root.y - node.y) * dy;
	    } : function (node) {
	      node.x = (node.x - x0) / (x1 - x0) * dx;
	      node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;
	    });
	  }

	  cluster.separation = function (x) {
	    return arguments.length ? (separation = x, cluster) : separation;
	  };

	  cluster.size = function (x) {
	    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : nodeSize ? null : [dx, dy];
	  };

	  cluster.nodeSize = function (x) {
	    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : nodeSize ? [dx, dy] : null;
	  };

	  return cluster;
	}

	function node_each (callback) {
	  var node = this,
	      current,
	      next = [node],
	      children,
	      i,
	      n;
	  do {
	    current = next.reverse(), next = [];
	    while (node = current.pop()) {
	      callback(node), children = node.children;
	      if (children) for (i = 0, n = children.length; i < n; ++i) {
	        next.push(children[i]);
	      }
	    }
	  } while (next.length);
	  return this;
	}

	function node_eachBefore (callback) {
	  var node = this,
	      nodes = [node],
	      children,
	      i;
	  while (node = nodes.pop()) {
	    callback(node), children = node.children;
	    if (children) for (i = children.length - 1; i >= 0; --i) {
	      nodes.push(children[i]);
	    }
	  }
	  return this;
	}

	function node_eachAfter (callback) {
	  var node = this,
	      nodes = [node],
	      next = [],
	      children,
	      i,
	      n;
	  while (node = nodes.pop()) {
	    next.push(node), children = node.children;
	    if (children) for (i = 0, n = children.length; i < n; ++i) {
	      nodes.push(children[i]);
	    }
	  }
	  while (node = next.pop()) {
	    callback(node);
	  }
	  return this;
	}

	function node_sum (value) {
	  return this.eachAfter(function (node) {
	    var sum = +value(node.data) || 0,
	        children = node.children,
	        i = children && children.length;
	    while (--i >= 0) sum += children[i].value;
	    node.value = sum;
	  });
	}

	function node_sort (compare) {
	  return this.eachBefore(function (node) {
	    if (node.children) {
	      node.children.sort(compare);
	    }
	  });
	}

	function node_path (end) {
	  var start = this,
	      ancestor = leastCommonAncestor(start, end),
	      nodes = [start];
	  while (start !== ancestor) {
	    start = start.parent;
	    nodes.push(start);
	  }
	  var k = nodes.length;
	  while (end !== ancestor) {
	    nodes.splice(k, 0, end);
	    end = end.parent;
	  }
	  return nodes;
	}

	function leastCommonAncestor(a, b) {
	  if (a === b) return a;
	  var aNodes = a.ancestors(),
	      bNodes = b.ancestors(),
	      c = null;
	  a = aNodes.pop();
	  b = bNodes.pop();
	  while (a === b) {
	    c = a;
	    a = aNodes.pop();
	    b = bNodes.pop();
	  }
	  return c;
	}

	function node_ancestors () {
	  var node = this,
	      nodes = [node];
	  while (node = node.parent) {
	    nodes.push(node);
	  }
	  return nodes;
	}

	function node_descendants () {
	  var nodes = [];
	  this.each(function (node) {
	    nodes.push(node);
	  });
	  return nodes;
	}

	function node_leaves () {
	  var leaves = [];
	  this.eachBefore(function (node) {
	    if (!node.children) {
	      leaves.push(node);
	    }
	  });
	  return leaves;
	}

	function node_links () {
	  var root = this,
	      links = [];
	  root.each(function (node) {
	    if (node !== root) {
	      // Don’t include the root’s parent, if any.
	      links.push({ source: node.parent, target: node });
	    }
	  });
	  return links;
	}

	function hierarchy(data, children) {
	  var root = new Node(data),
	      valued = +data.value && (root.value = data.value),
	      node,
	      nodes = [root],
	      child,
	      childs,
	      i,
	      n;

	  if (children == null) children = defaultChildren;

	  while (node = nodes.pop()) {
	    if (valued) node.value = +node.data.value;
	    if ((childs = children(node.data)) && (n = childs.length)) {
	      node.children = new Array(n);
	      for (i = n - 1; i >= 0; --i) {
	        nodes.push(child = node.children[i] = new Node(childs[i]));
	        child.parent = node;
	        child.depth = node.depth + 1;
	      }
	    }
	  }

	  return root.eachBefore(computeHeight);
	}

	function node_copy() {
	  return hierarchy(this).eachBefore(copyData);
	}

	function defaultChildren(d) {
	  return d.children;
	}

	function copyData(node) {
	  node.data = node.data.data;
	}

	function computeHeight(node) {
	  var height = 0;
	  do node.height = height; while ((node = node.parent) && node.height < ++height);
	}

	function Node(data) {
	  this.data = data;
	  this.depth = this.height = 0;
	  this.parent = null;
	}

	Node.prototype = hierarchy.prototype = {
	  constructor: Node,
	  each: node_each,
	  eachAfter: node_eachAfter,
	  eachBefore: node_eachBefore,
	  sum: node_sum,
	  sort: node_sort,
	  path: node_path,
	  ancestors: node_ancestors,
	  descendants: node_descendants,
	  leaves: node_leaves,
	  links: node_links,
	  copy: node_copy
	};

	function Node$2(value) {
	  this._ = value;
	  this.next = null;
	}

	function shuffle$1 (array) {
	  var i,
	      n = (array = array.slice()).length,
	      head = null,
	      node = head;

	  while (n) {
	    var next = new Node$2(array[n - 1]);
	    if (node) node = node.next = next;else node = head = next;
	    array[i] = array[--n];
	  }

	  return {
	    head: head,
	    tail: node
	  };
	}

	function enclose (circles) {
	  return encloseN(shuffle$1(circles), []);
	}

	function encloses(a, b) {
	  var dx = b.x - a.x,
	      dy = b.y - a.y,
	      dr = a.r - b.r;
	  return dr * dr + 1e-6 > dx * dx + dy * dy;
	}

	// Returns the smallest circle that contains circles L and intersects circles B.
	function encloseN(L, B) {
	  var circle,
	      l0 = null,
	      l1 = L.head,
	      l2,
	      p1;

	  switch (B.length) {
	    case 1:
	      circle = enclose1(B[0]);break;
	    case 2:
	      circle = enclose2(B[0], B[1]);break;
	    case 3:
	      circle = enclose3(B[0], B[1], B[2]);break;
	  }

	  while (l1) {
	    p1 = l1._, l2 = l1.next;
	    if (!circle || !encloses(circle, p1)) {

	      // Temporarily truncate L before l1.
	      if (l0) L.tail = l0, l0.next = null;else L.head = L.tail = null;

	      B.push(p1);
	      circle = encloseN(L, B); // Note: reorders L!
	      B.pop();

	      // Move l1 to the front of L and reconnect the truncated list L.
	      if (L.head) l1.next = L.head, L.head = l1;else l1.next = null, L.head = L.tail = l1;
	      l0 = L.tail, l0.next = l2;
	    } else {
	      l0 = l1;
	    }
	    l1 = l2;
	  }

	  L.tail = l0;
	  return circle;
	}

	function enclose1(a) {
	  return {
	    x: a.x,
	    y: a.y,
	    r: a.r
	  };
	}

	function enclose2(a, b) {
	  var x1 = a.x,
	      y1 = a.y,
	      r1 = a.r,
	      x2 = b.x,
	      y2 = b.y,
	      r2 = b.r,
	      x21 = x2 - x1,
	      y21 = y2 - y1,
	      r21 = r2 - r1,
	      l = Math.sqrt(x21 * x21 + y21 * y21);
	  return {
	    x: (x1 + x2 + x21 / l * r21) / 2,
	    y: (y1 + y2 + y21 / l * r21) / 2,
	    r: (l + r1 + r2) / 2
	  };
	}

	function enclose3(a, b, c) {
	  var x1 = a.x,
	      y1 = a.y,
	      r1 = a.r,
	      x2 = b.x,
	      y2 = b.y,
	      r2 = b.r,
	      x3 = c.x,
	      y3 = c.y,
	      r3 = c.r,
	      a2 = 2 * (x1 - x2),
	      b2 = 2 * (y1 - y2),
	      c2 = 2 * (r2 - r1),
	      d2 = x1 * x1 + y1 * y1 - r1 * r1 - x2 * x2 - y2 * y2 + r2 * r2,
	      a3 = 2 * (x1 - x3),
	      b3 = 2 * (y1 - y3),
	      c3 = 2 * (r3 - r1),
	      d3 = x1 * x1 + y1 * y1 - r1 * r1 - x3 * x3 - y3 * y3 + r3 * r3,
	      ab = a3 * b2 - a2 * b3,
	      xa = (b2 * d3 - b3 * d2) / ab - x1,
	      xb = (b3 * c2 - b2 * c3) / ab,
	      ya = (a3 * d2 - a2 * d3) / ab - y1,
	      yb = (a2 * c3 - a3 * c2) / ab,
	      A = xb * xb + yb * yb - 1,
	      B = 2 * (xa * xb + ya * yb + r1),
	      C = xa * xa + ya * ya - r1 * r1,
	      r = (-B - Math.sqrt(B * B - 4 * A * C)) / (2 * A);
	  return {
	    x: xa + xb * r + x1,
	    y: ya + yb * r + y1,
	    r: r
	  };
	}

	function place(a, b, c) {
	  var ax = a.x,
	      ay = a.y,
	      da = b.r + c.r,
	      db = a.r + c.r,
	      dx = b.x - ax,
	      dy = b.y - ay,
	      dc = dx * dx + dy * dy;
	  if (dc) {
	    var x = 0.5 + ((db *= db) - (da *= da)) / (2 * dc),
	        y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);
	    c.x = ax + x * dx + y * dy;
	    c.y = ay + x * dy - y * dx;
	  } else {
	    c.x = ax + db;
	    c.y = ay;
	  }
	}

	function intersects(a, b) {
	  var dx = b.x - a.x,
	      dy = b.y - a.y,
	      dr = a.r + b.r;
	  return dr * dr > dx * dx + dy * dy;
	}

	function distance2(circle, x, y) {
	  var dx = circle.x - x,
	      dy = circle.y - y;
	  return dx * dx + dy * dy;
	}

	function Node$1(circle) {
	  this._ = circle;
	  this.next = null;
	  this.previous = null;
	}

	function packEnclose(circles) {
	  if (!(n = circles.length)) return 0;

	  var a, b, c, n;

	  // Place the first circle.
	  a = circles[0], a.x = 0, a.y = 0;
	  if (!(n > 1)) return a.r;

	  // Place the second circle.
	  b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;
	  if (!(n > 2)) return a.r + b.r;

	  // Place the third circle.
	  place(b, a, c = circles[2]);

	  // Initialize the weighted centroid.
	  var aa = a.r * a.r,
	      ba = b.r * b.r,
	      ca = c.r * c.r,
	      oa = aa + ba + ca,
	      ox = aa * a.x + ba * b.x + ca * c.x,
	      oy = aa * a.y + ba * b.y + ca * c.y,
	      cx,
	      cy,
	      i,
	      j,
	      k,
	      sj,
	      sk;

	  // Initialize the front-chain using the first three circles a, b and c.
	  a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);
	  a.next = c.previous = b;
	  b.next = a.previous = c;
	  c.next = b.previous = a;

	  // Attempt to place each remaining circle…
	  pack: for (i = 3; i < n; ++i) {
	    place(a._, b._, c = circles[i]), c = new Node$1(c);

	    // If there are only three elements in the front-chain…
	    if ((k = a.previous) === (j = b.next)) {
	      // If the new circle intersects the third circle,
	      // rotate the front chain to try the next position.
	      if (intersects(j._, c._)) {
	        a = b, b = j, --i;
	        continue pack;
	      }
	    }

	    // Find the closest intersecting circle on the front-chain, if any.
	    else {
	        sj = j._.r, sk = k._.r;
	        do {
	          if (sj <= sk) {
	            if (intersects(j._, c._)) {
	              b = j, a.next = b, b.previous = a, --i;
	              continue pack;
	            }
	            j = j.next, sj += j._.r;
	          } else {
	            if (intersects(k._, c._)) {
	              a = k, a.next = b, b.previous = a, --i;
	              continue pack;
	            }
	            k = k.previous, sk += k._.r;
	          }
	        } while (j !== k.next);
	      }

	    // Success! Insert the new circle c between a and b.
	    c.previous = a, c.next = b, a.next = b.previous = b = c;

	    // Update the weighted centroid.
	    oa += ca = c._.r * c._.r;
	    ox += ca * c._.x;
	    oy += ca * c._.y;

	    // Compute the new closest circle a to centroid.
	    aa = distance2(a._, cx = ox / oa, cy = oy / oa);
	    while ((c = c.next) !== b) {
	      if ((ca = distance2(c._, cx, cy)) < aa) {
	        a = c, aa = ca;
	      }
	    }
	    b = a.next;
	  }

	  // Compute the enclosing circle of the front chain.
	  a = [b._], c = b;while ((c = c.next) !== b) a.push(c._);c = enclose(a);

	  // Translate the circles to put the enclosing circle around the origin.
	  for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;

	  return c.r;
	}

	function packSiblings (circles) {
	  packEnclose(circles);
	  return circles;
	}

	function optional(f) {
	  return f == null ? null : required(f);
	}

	function required(f) {
	  if (typeof f !== "function") throw new Error();
	  return f;
	}

	function constantZero() {
	  return 0;
	}

	function constant$5 (x) {
	  return function () {
	    return x;
	  };
	}

	function defaultRadius(d) {
	  return Math.sqrt(d.value);
	}

	function pack$1 () {
	  var radius = null,
	      dx = 1,
	      dy = 1,
	      padding = constantZero;

	  function pack(root) {
	    root.x = dx / 2, root.y = dy / 2;
	    if (radius) {
	      root.eachBefore(radiusLeaf(radius)).eachAfter(packChildren(padding, 0.5)).eachBefore(translateChild(1));
	    } else {
	      root.eachBefore(radiusLeaf(defaultRadius)).eachAfter(packChildren(constantZero, 1)).eachAfter(packChildren(padding, root.r / Math.min(dx, dy))).eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));
	    }
	    return root;
	  }

	  pack.radius = function (x) {
	    return arguments.length ? (radius = optional(x), pack) : radius;
	  };

	  pack.size = function (x) {
	    return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
	  };

	  pack.padding = function (x) {
	    return arguments.length ? (padding = typeof x === "function" ? x : constant$5(+x), pack) : padding;
	  };

	  return pack;
	}

	function radiusLeaf(radius) {
	  return function (node) {
	    if (!node.children) {
	      node.r = Math.max(0, +radius(node) || 0);
	    }
	  };
	}

	function packChildren(padding, k) {
	  return function (node) {
	    if (children = node.children) {
	      var children,
	          i,
	          n = children.length,
	          r = padding(node) * k || 0,
	          e;

	      if (r) for (i = 0; i < n; ++i) children[i].r += r;
	      e = packEnclose(children);
	      if (r) for (i = 0; i < n; ++i) children[i].r -= r;
	      node.r = e + r;
	    }
	  };
	}

	function translateChild(k) {
	  return function (node) {
	    var parent = node.parent;
	    node.r *= k;
	    if (parent) {
	      node.x = parent.x + k * node.x;
	      node.y = parent.y + k * node.y;
	    }
	  };
	}

	function roundNode (node) {
	  node.x0 = Math.round(node.x0);
	  node.y0 = Math.round(node.y0);
	  node.x1 = Math.round(node.x1);
	  node.y1 = Math.round(node.y1);
	}

	function treemapDice (parent, x0, y0, x1, y1) {
	  var nodes = parent.children,
	      node,
	      i = -1,
	      n = nodes.length,
	      k = parent.value && (x1 - x0) / parent.value;

	  while (++i < n) {
	    node = nodes[i], node.y0 = y0, node.y1 = y1;
	    node.x0 = x0, node.x1 = x0 += node.value * k;
	  }
	}

	function partition () {
	  var dx = 1,
	      dy = 1,
	      padding = 0,
	      round = false;

	  function partition(root) {
	    var n = root.height + 1;
	    root.x0 = root.y0 = padding;
	    root.x1 = dx;
	    root.y1 = dy / n;
	    root.eachBefore(positionNode(dy, n));
	    if (round) root.eachBefore(roundNode);
	    return root;
	  }

	  function positionNode(dy, n) {
	    return function (node) {
	      if (node.children) {
	        treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
	      }
	      var x0 = node.x0,
	          y0 = node.y0,
	          x1 = node.x1 - padding,
	          y1 = node.y1 - padding;
	      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
	      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
	      node.x0 = x0;
	      node.y0 = y0;
	      node.x1 = x1;
	      node.y1 = y1;
	    };
	  }

	  partition.round = function (x) {
	    return arguments.length ? (round = !!x, partition) : round;
	  };

	  partition.size = function (x) {
	    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
	  };

	  partition.padding = function (x) {
	    return arguments.length ? (padding = +x, partition) : padding;
	  };

	  return partition;
	}

var 	keyPrefix$1 = "$";
	var preroot = { depth: -1 };
	var ambiguous = {};
	function defaultId(d) {
	  return d.id;
	}

	function defaultParentId(d) {
	  return d.parentId;
	}

	function stratify () {
	  var id = defaultId,
	      parentId = defaultParentId;

	  function stratify(data) {
	    var d,
	        i,
	        n = data.length,
	        root,
	        parent,
	        node,
	        nodes = new Array(n),
	        nodeId,
	        nodeKey,
	        nodeByKey = {};

	    for (i = 0; i < n; ++i) {
	      d = data[i], node = nodes[i] = new Node(d);
	      if ((nodeId = id(d, i, data)) != null && (nodeId += "")) {
	        nodeKey = keyPrefix$1 + (node.id = nodeId);
	        nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;
	      }
	    }

	    for (i = 0; i < n; ++i) {
	      node = nodes[i], nodeId = parentId(data[i], i, data);
	      if (nodeId == null || !(nodeId += "")) {
	        if (root) throw new Error("multiple roots");
	        root = node;
	      } else {
	        parent = nodeByKey[keyPrefix$1 + nodeId];
	        if (!parent) throw new Error("missing: " + nodeId);
	        if (parent === ambiguous) throw new Error("ambiguous: " + nodeId);
	        if (parent.children) parent.children.push(node);else parent.children = [node];
	        node.parent = parent;
	      }
	    }

	    if (!root) throw new Error("no root");
	    root.parent = preroot;
	    root.eachBefore(function (node) {
	      node.depth = node.parent.depth + 1;--n;
	    }).eachBefore(computeHeight);
	    root.parent = null;
	    if (n > 0) throw new Error("cycle");

	    return root;
	  }

	  stratify.id = function (x) {
	    return arguments.length ? (id = required(x), stratify) : id;
	  };

	  stratify.parentId = function (x) {
	    return arguments.length ? (parentId = required(x), stratify) : parentId;
	  };

	  return stratify;
	}

	function defaultSeparation$1(a, b) {
	  return a.parent === b.parent ? 1 : 2;
	}

	// function radialSeparation(a, b) {
	//   return (a.parent === b.parent ? 1 : 2) / a.depth;
	// }

	// This function is used to traverse the left contour of a subtree (or
	// subforest). It returns the successor of v on this contour. This successor is
	// either given by the leftmost child of v or by the thread of v. The function
	// returns null if and only if v is on the highest level of its subtree.
	function nextLeft(v) {
	  var children = v.children;
	  return children ? children[0] : v.t;
	}

	// This function works analogously to nextLeft.
	function nextRight(v) {
	  var children = v.children;
	  return children ? children[children.length - 1] : v.t;
	}

	// Shifts the current subtree rooted at w+. This is done by increasing
	// prelim(w+) and mod(w+) by shift.
	function moveSubtree(wm, wp, shift) {
	  var change = shift / (wp.i - wm.i);
	  wp.c -= change;
	  wp.s += shift;
	  wm.c += change;
	  wp.z += shift;
	  wp.m += shift;
	}

	// All other shifts, applied to the smaller subtrees between w- and w+, are
	// performed by this function. To prepare the shifts, we have to adjust
	// change(w+), shift(w+), and change(w-).
	function executeShifts(v) {
	  var shift = 0,
	      change = 0,
	      children = v.children,
	      i = children.length,
	      w;
	  while (--i >= 0) {
	    w = children[i];
	    w.z += shift;
	    w.m += shift;
	    shift += w.s + (change += w.c);
	  }
	}

	// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,
	// returns the specified (default) ancestor.
	function nextAncestor(vim, v, ancestor) {
	  return vim.a.parent === v.parent ? vim.a : ancestor;
	}

	function TreeNode(node, i) {
	  this._ = node;
	  this.parent = null;
	  this.children = null;
	  this.A = null; // default ancestor
	  this.a = this; // ancestor
	  this.z = 0; // prelim
	  this.m = 0; // mod
	  this.c = 0; // change
	  this.s = 0; // shift
	  this.t = null; // thread
	  this.i = i; // number
	}

	TreeNode.prototype = Object.create(Node.prototype);

	function treeRoot(root) {
	  var tree = new TreeNode(root, 0),
	      node,
	      nodes = [tree],
	      child,
	      children,
	      i,
	      n;

	  while (node = nodes.pop()) {
	    if (children = node._.children) {
	      node.children = new Array(n = children.length);
	      for (i = n - 1; i >= 0; --i) {
	        nodes.push(child = node.children[i] = new TreeNode(children[i], i));
	        child.parent = node;
	      }
	    }
	  }

	  (tree.parent = new TreeNode(null, 0)).children = [tree];
	  return tree;
	}

	// Node-link tree diagram using the Reingold-Tilford "tidy" algorithm
	function tree () {
	  var separation = defaultSeparation$1,
	      dx = 1,
	      dy = 1,
	      nodeSize = null;

	  function tree(root) {
	    var t = treeRoot(root);

	    // Compute the layout using Buchheim et al.’s algorithm.
	    t.eachAfter(firstWalk), t.parent.m = -t.z;
	    t.eachBefore(secondWalk);

	    // If a fixed node size is specified, scale x and y.
	    if (nodeSize) root.eachBefore(sizeNode);

	    // If a fixed tree size is specified, scale x and y based on the extent.
	    // Compute the left-most, right-most, and depth-most nodes for extents.
	    else {
	        var left = root,
	            right = root,
	            bottom = root;
	        root.eachBefore(function (node) {
	          if (node.x < left.x) left = node;
	          if (node.x > right.x) right = node;
	          if (node.depth > bottom.depth) bottom = node;
	        });
	        var s = left === right ? 1 : separation(left, right) / 2,
	            tx = s - left.x,
	            kx = dx / (right.x + s + tx),
	            ky = dy / (bottom.depth || 1);
	        root.eachBefore(function (node) {
	          node.x = (node.x + tx) * kx;
	          node.y = node.depth * ky;
	        });
	      }

	    return root;
	  }

	  // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is
	  // applied recursively to the children of v, as well as the function
	  // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the
	  // node v is placed to the midpoint of its outermost children.
	  function firstWalk(v) {
	    var children = v.children,
	        siblings = v.parent.children,
	        w = v.i ? siblings[v.i - 1] : null;
	    if (children) {
	      executeShifts(v);
	      var midpoint = (children[0].z + children[children.length - 1].z) / 2;
	      if (w) {
	        v.z = w.z + separation(v._, w._);
	        v.m = v.z - midpoint;
	      } else {
	        v.z = midpoint;
	      }
	    } else if (w) {
	      v.z = w.z + separation(v._, w._);
	    }
	    v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
	  }

	  // Computes all real x-coordinates by summing up the modifiers recursively.
	  function secondWalk(v) {
	    v._.x = v.z + v.parent.m;
	    v.m += v.parent.m;
	  }

	  // The core of the algorithm. Here, a new subtree is combined with the
	  // previous subtrees. Threads are used to traverse the inside and outside
	  // contours of the left and right subtree up to the highest common level. The
	  // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the
	  // superscript o means outside and i means inside, the subscript - means left
	  // subtree and + means right subtree. For summing up the modifiers along the
	  // contour, we use respective variables si+, si-, so-, and so+. Whenever two
	  // nodes of the inside contours conflict, we compute the left one of the
	  // greatest uncommon ancestors using the function ANCESTOR and call MOVE
	  // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.
	  // Finally, we add a new thread (if necessary).
	  function apportion(v, w, ancestor) {
	    if (w) {
	      var vip = v,
	          vop = v,
	          vim = w,
	          vom = vip.parent.children[0],
	          sip = vip.m,
	          sop = vop.m,
	          sim = vim.m,
	          som = vom.m,
	          shift;
	      while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {
	        vom = nextLeft(vom);
	        vop = nextRight(vop);
	        vop.a = v;
	        shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
	        if (shift > 0) {
	          moveSubtree(nextAncestor(vim, v, ancestor), v, shift);
	          sip += shift;
	          sop += shift;
	        }
	        sim += vim.m;
	        sip += vip.m;
	        som += vom.m;
	        sop += vop.m;
	      }
	      if (vim && !nextRight(vop)) {
	        vop.t = vim;
	        vop.m += sim - sop;
	      }
	      if (vip && !nextLeft(vom)) {
	        vom.t = vip;
	        vom.m += sip - som;
	        ancestor = v;
	      }
	    }
	    return ancestor;
	  }

	  function sizeNode(node) {
	    node.x *= dx;
	    node.y = node.depth * dy;
	  }

	  tree.separation = function (x) {
	    return arguments.length ? (separation = x, tree) : separation;
	  };

	  tree.size = function (x) {
	    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : nodeSize ? null : [dx, dy];
	  };

	  tree.nodeSize = function (x) {
	    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : nodeSize ? [dx, dy] : null;
	  };

	  return tree;
	}

	function treemapSlice (parent, x0, y0, x1, y1) {
	  var nodes = parent.children,
	      node,
	      i = -1,
	      n = nodes.length,
	      k = parent.value && (y1 - y0) / parent.value;

	  while (++i < n) {
	    node = nodes[i], node.x0 = x0, node.x1 = x1;
	    node.y0 = y0, node.y1 = y0 += node.value * k;
	  }
	}

	var phi = (1 + Math.sqrt(5)) / 2;

	function squarifyRatio(ratio, parent, x0, y0, x1, y1) {
	  var rows = [],
	      nodes = parent.children,
	      row,
	      nodeValue,
	      i0 = 0,
	      i1,
	      n = nodes.length,
	      dx,
	      dy,
	      value = parent.value,
	      sumValue,
	      minValue,
	      maxValue,
	      newRatio,
	      minRatio,
	      alpha,
	      beta;

	  while (i0 < n) {
	    dx = x1 - x0, dy = y1 - y0;
	    minValue = maxValue = sumValue = nodes[i0].value;
	    alpha = Math.max(dy / dx, dx / dy) / (value * ratio);
	    beta = sumValue * sumValue * alpha;
	    minRatio = Math.max(maxValue / beta, beta / minValue);

	    // Keep adding nodes while the aspect ratio maintains or improves.
	    for (i1 = i0 + 1; i1 < n; ++i1) {
	      sumValue += nodeValue = nodes[i1].value;
	      if (nodeValue < minValue) minValue = nodeValue;
	      if (nodeValue > maxValue) maxValue = nodeValue;
	      beta = sumValue * sumValue * alpha;
	      newRatio = Math.max(maxValue / beta, beta / minValue);
	      if (newRatio > minRatio) {
	        sumValue -= nodeValue;break;
	      }
	      minRatio = newRatio;
	    }

	    // Position and record the row orientation.
	    rows.push(row = { value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1) });
	    if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);
	    value -= sumValue, i0 = i1;
	  }

	  return rows;
	}

	var squarify = (function custom(ratio) {

	  function squarify(parent, x0, y0, x1, y1) {
	    squarifyRatio(ratio, parent, x0, y0, x1, y1);
	  }

	  squarify.ratio = function (x) {
	    return custom((x = +x) > 1 ? x : 1);
	  };

	  return squarify;
	})(phi);

	function treemap () {
	  var tile = squarify,
	      round = false,
	      dx = 1,
	      dy = 1,
	      paddingStack = [0],
	      paddingInner = constantZero,
	      paddingTop = constantZero,
	      paddingRight = constantZero,
	      paddingBottom = constantZero,
	      paddingLeft = constantZero;

	  function treemap(root) {
	    root.x0 = root.y0 = 0;
	    root.x1 = dx;
	    root.y1 = dy;
	    root.eachBefore(positionNode);
	    paddingStack = [0];
	    if (round) root.eachBefore(roundNode);
	    return root;
	  }

	  function positionNode(node) {
	    var p = paddingStack[node.depth],
	        x0 = node.x0 + p,
	        y0 = node.y0 + p,
	        x1 = node.x1 - p,
	        y1 = node.y1 - p;
	    if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
	    if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
	    node.x0 = x0;
	    node.y0 = y0;
	    node.x1 = x1;
	    node.y1 = y1;
	    if (node.children) {
	      p = paddingStack[node.depth + 1] = paddingInner(node) / 2;
	      x0 += paddingLeft(node) - p;
	      y0 += paddingTop(node) - p;
	      x1 -= paddingRight(node) - p;
	      y1 -= paddingBottom(node) - p;
	      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
	      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
	      tile(node, x0, y0, x1, y1);
	    }
	  }

	  treemap.round = function (x) {
	    return arguments.length ? (round = !!x, treemap) : round;
	  };

	  treemap.size = function (x) {
	    return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];
	  };

	  treemap.tile = function (x) {
	    return arguments.length ? (tile = required(x), treemap) : tile;
	  };

	  treemap.padding = function (x) {
	    return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();
	  };

	  treemap.paddingInner = function (x) {
	    return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$5(+x), treemap) : paddingInner;
	  };

	  treemap.paddingOuter = function (x) {
	    return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();
	  };

	  treemap.paddingTop = function (x) {
	    return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$5(+x), treemap) : paddingTop;
	  };

	  treemap.paddingRight = function (x) {
	    return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$5(+x), treemap) : paddingRight;
	  };

	  treemap.paddingBottom = function (x) {
	    return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$5(+x), treemap) : paddingBottom;
	  };

	  treemap.paddingLeft = function (x) {
	    return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$5(+x), treemap) : paddingLeft;
	  };

	  return treemap;
	}

	function treemapBinary (parent, x0, y0, x1, y1) {
	  var nodes = parent.children,
	      i,
	      n = nodes.length,
	      sum,
	      sums = new Array(n + 1);

	  for (sums[0] = sum = i = 0; i < n; ++i) {
	    sums[i + 1] = sum += nodes[i].value;
	  }

	  partition(0, n, parent.value, x0, y0, x1, y1);

	  function partition(i, j, value, x0, y0, x1, y1) {
	    if (i >= j - 1) {
	      var node = nodes[i];
	      node.x0 = x0, node.y0 = y0;
	      node.x1 = x1, node.y1 = y1;
	      return;
	    }

	    var valueOffset = sums[i],
	        valueTarget = value / 2 + valueOffset,
	        k = i + 1,
	        hi = j - 1;

	    while (k < hi) {
	      var mid = k + hi >>> 1;
	      if (sums[mid] < valueTarget) k = mid + 1;else hi = mid;
	    }

	    var valueLeft = sums[k] - valueOffset,
	        valueRight = value - valueLeft;

	    if (y1 - y0 > x1 - x0) {
	      var yk = (y0 * valueRight + y1 * valueLeft) / value;
	      partition(i, k, valueLeft, x0, y0, x1, yk);
	      partition(k, j, valueRight, x0, yk, x1, y1);
	    } else {
	      var xk = (x0 * valueRight + x1 * valueLeft) / value;
	      partition(i, k, valueLeft, x0, y0, xk, y1);
	      partition(k, j, valueRight, xk, y0, x1, y1);
	    }
	  }
	}

	function treemapSliceDice (parent, x0, y0, x1, y1) {
	  (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);
	}

	var treemapResquarify = (function custom(ratio) {

	  function resquarify(parent, x0, y0, x1, y1) {
	    if ((rows = parent._squarify) && rows.ratio === ratio) {
	      var rows,
	          row,
	          nodes,
	          i,
	          j = -1,
	          n,
	          m = rows.length,
	          value = parent.value;

	      while (++j < m) {
	        row = rows[j], nodes = row.children;
	        for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;
	        if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);
	        value -= row.value;
	      }
	    } else {
	      parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);
	      rows.ratio = ratio;
	    }
	  }

	  resquarify.ratio = function (x) {
	    return custom((x = +x) > 1 ? x : 1);
	  };

	  return resquarify;
	})(phi);

	function forceCenter (x, y) {
	  var nodes;

	  if (x == null) x = 0;
	  if (y == null) y = 0;

	  function force() {
	    var i,
	        n = nodes.length,
	        node,
	        sx = 0,
	        sy = 0;

	    for (i = 0; i < n; ++i) {
	      node = nodes[i], sx += node.x, sy += node.y;
	    }

	    for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) {
	      node = nodes[i], node.x -= sx, node.y -= sy;
	    }
	  }

	  force.initialize = function (_) {
	    nodes = _;
	  };

	  force.x = function (_) {
	    return arguments.length ? (x = +_, force) : x;
	  };

	  force.y = function (_) {
	    return arguments.length ? (y = +_, force) : y;
	  };

	  return force;
	}

	function constant$6 (x) {
	  return function () {
	    return x;
	  };
	}

	function jiggle () {
	  return (Math.random() - 0.5) * 1e-6;
	}

	function x$1(d) {
	  return d.x + d.vx;
	}

	function y$1(d) {
	  return d.y + d.vy;
	}

	function forceCollide (radius) {
	  var nodes,
	      radii,
	      strength = 1,
	      iterations = 1;

	  if (typeof radius !== "function") radius = constant$6(radius == null ? 1 : +radius);

	  function force() {
	    var i,
	        n = nodes.length,
	        tree,
	        node,
	        xi,
	        yi,
	        ri,
	        ri2;

	    for (var k = 0; k < iterations; ++k) {
	      tree = quadtree(nodes, x$1, y$1).visitAfter(prepare);
	      for (i = 0; i < n; ++i) {
	        node = nodes[i];
	        ri = radii[i], ri2 = ri * ri;
	        xi = node.x + node.vx;
	        yi = node.y + node.vy;
	        tree.visit(apply);
	      }
	    }

	    function apply(quad, x0, y0, x1, y1) {
	      var data = quad.data,
	          rj = quad.r,
	          r = ri + rj;
	      if (data) {
	        if (data.index > i) {
	          var x = xi - data.x - data.vx,
	              y = yi - data.y - data.vy,
	              l = x * x + y * y;
	          if (l < r * r) {
	            if (x === 0) x = jiggle(), l += x * x;
	            if (y === 0) y = jiggle(), l += y * y;
	            l = (r - (l = Math.sqrt(l))) / l * strength;
	            node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));
	            node.vy += (y *= l) * r;
	            data.vx -= x * (r = 1 - r);
	            data.vy -= y * r;
	          }
	        }
	        return;
	      }
	      return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;
	    }
	  }

	  function prepare(quad) {
	    if (quad.data) return quad.r = radii[quad.data.index];
	    for (var i = quad.r = 0; i < 4; ++i) {
	      if (quad[i] && quad[i].r > quad.r) {
	        quad.r = quad[i].r;
	      }
	    }
	  }

	  function initialize() {
	    if (!nodes) return;
	    var i,
	        n = nodes.length;
	    radii = new Array(n);
	    for (i = 0; i < n; ++i) radii[i] = +radius(nodes[i], i, nodes);
	  }

	  force.initialize = function (_) {
	    nodes = _;
	    initialize();
	  };

	  force.iterations = function (_) {
	    return arguments.length ? (iterations = +_, force) : iterations;
	  };

	  force.strength = function (_) {
	    return arguments.length ? (strength = +_, force) : strength;
	  };

	  force.radius = function (_) {
	    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : radius;
	  };

	  return force;
	}

	function index(d, i) {
	  return i;
	}

	function find(nodeById, nodeId) {
	  var node = nodeById.get(nodeId);
	  if (!node) throw new Error("missing: " + nodeId);
	  return node;
	}

	function forceLink (links) {
	  var id = index,
	      strength = defaultStrength,
	      strengths,
	      distance = constant$6(30),
	      distances,
	      nodes,
	      count,
	      bias,
	      iterations = 1;

	  if (links == null) links = [];

	  function defaultStrength(link) {
	    return 1 / Math.min(count[link.source.index], count[link.target.index]);
	  }

	  function force(alpha) {
	    for (var k = 0, n = links.length; k < iterations; ++k) {
	      for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
	        link = links[i], source = link.source, target = link.target;
	        x = target.x + target.vx - source.x - source.vx || jiggle();
	        y = target.y + target.vy - source.y - source.vy || jiggle();
	        l = Math.sqrt(x * x + y * y);
	        l = (l - distances[i]) / l * alpha * strengths[i];
	        x *= l, y *= l;
	        target.vx -= x * (b = bias[i]);
	        target.vy -= y * b;
	        source.vx += x * (b = 1 - b);
	        source.vy += y * b;
	      }
	    }
	  }

	  function initialize() {
	    if (!nodes) return;

	    var i,
	        n = nodes.length,
	        m = links.length,
	        nodeById = map$1(nodes, id),
	        link;

	    for (i = 0, count = new Array(n); i < n; ++i) {
	      count[i] = 0;
	    }

	    for (i = 0; i < m; ++i) {
	      link = links[i], link.index = i;
	      if (typeof link.source !== "object") link.source = find(nodeById, link.source);
	      if (typeof link.target !== "object") link.target = find(nodeById, link.target);
	      ++count[link.source.index], ++count[link.target.index];
	    }

	    for (i = 0, bias = new Array(m); i < m; ++i) {
	      link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
	    }

	    strengths = new Array(m), initializeStrength();
	    distances = new Array(m), initializeDistance();
	  }

	  function initializeStrength() {
	    if (!nodes) return;

	    for (var i = 0, n = links.length; i < n; ++i) {
	      strengths[i] = +strength(links[i], i, links);
	    }
	  }

	  function initializeDistance() {
	    if (!nodes) return;

	    for (var i = 0, n = links.length; i < n; ++i) {
	      distances[i] = +distance(links[i], i, links);
	    }
	  }

	  force.initialize = function (_) {
	    nodes = _;
	    initialize();
	  };

	  force.links = function (_) {
	    return arguments.length ? (links = _, initialize(), force) : links;
	  };

	  force.id = function (_) {
	    return arguments.length ? (id = _, force) : id;
	  };

	  force.iterations = function (_) {
	    return arguments.length ? (iterations = +_, force) : iterations;
	  };

	  force.strength = function (_) {
	    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initializeStrength(), force) : strength;
	  };

	  force.distance = function (_) {
	    return arguments.length ? (distance = typeof _ === "function" ? _ : constant$6(+_), initializeDistance(), force) : distance;
	  };

	  return force;
	}

	function x$2(d) {
	  return d.x;
	}

	function y$2(d) {
	  return d.y;
	}

	var initialRadius = 10;
	var initialAngle = Math.PI * (3 - Math.sqrt(5));
	function forceSimulation (nodes) {
	  var simulation,
	      alpha = 1,
	      alphaMin = 0.001,
	      alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
	      alphaTarget = 0,
	      velocityDecay = 0.6,
	      forces = map$1(),
	      stepper = timer(step),
	      event = dispatch("tick", "end");

	  if (nodes == null) nodes = [];

	  function step() {
	    tick();
	    event.call("tick", simulation);
	    if (alpha < alphaMin) {
	      stepper.stop();
	      event.call("end", simulation);
	    }
	  }

	  function tick() {
	    var i,
	        n = nodes.length,
	        node;

	    alpha += (alphaTarget - alpha) * alphaDecay;

	    forces.each(function (force) {
	      force(alpha);
	    });

	    for (i = 0; i < n; ++i) {
	      node = nodes[i];
	      if (node.fx == null) node.x += node.vx *= velocityDecay;else node.x = node.fx, node.vx = 0;
	      if (node.fy == null) node.y += node.vy *= velocityDecay;else node.y = node.fy, node.vy = 0;
	    }
	  }

	  function initializeNodes() {
	    for (var i = 0, n = nodes.length, node; i < n; ++i) {
	      node = nodes[i], node.index = i;
	      if (isNaN(node.x) || isNaN(node.y)) {
	        var radius = initialRadius * Math.sqrt(i),
	            angle = i * initialAngle;
	        node.x = radius * Math.cos(angle);
	        node.y = radius * Math.sin(angle);
	      }
	      if (isNaN(node.vx) || isNaN(node.vy)) {
	        node.vx = node.vy = 0;
	      }
	    }
	  }

	  function initializeForce(force) {
	    if (force.initialize) force.initialize(nodes);
	    return force;
	  }

	  initializeNodes();

	  return simulation = {
	    tick: tick,

	    restart: function () {
	      return stepper.restart(step), simulation;
	    },

	    stop: function () {
	      return stepper.stop(), simulation;
	    },

	    nodes: function (_) {
	      return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes;
	    },

	    alpha: function (_) {
	      return arguments.length ? (alpha = +_, simulation) : alpha;
	    },

	    alphaMin: function (_) {
	      return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
	    },

	    alphaDecay: function (_) {
	      return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
	    },

	    alphaTarget: function (_) {
	      return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
	    },

	    velocityDecay: function (_) {
	      return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
	    },

	    force: function (name, _) {
	      return arguments.length > 1 ? (_ == null ? forces.remove(name) : forces.set(name, initializeForce(_)), simulation) : forces.get(name);
	    },

	    find: function (x, y, radius) {
	      var i = 0,
	          n = nodes.length,
	          dx,
	          dy,
	          d2,
	          node,
	          closest;

	      if (radius == null) radius = Infinity;else radius *= radius;

	      for (i = 0; i < n; ++i) {
	        node = nodes[i];
	        dx = x - node.x;
	        dy = y - node.y;
	        d2 = dx * dx + dy * dy;
	        if (d2 < radius) closest = node, radius = d2;
	      }

	      return closest;
	    },

	    on: function (name, _) {
	      return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
	    }
	  };
	}

	function forceManyBody () {
	  var nodes,
	      node,
	      alpha,
	      strength = constant$6(-30),
	      strengths,
	      distanceMin2 = 1,
	      distanceMax2 = Infinity,
	      theta2 = 0.81;

	  function force(_) {
	    var i,
	        n = nodes.length,
	        tree = quadtree(nodes, x$2, y$2).visitAfter(accumulate);
	    for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
	  }

	  function initialize() {
	    if (!nodes) return;
	    var i,
	        n = nodes.length;
	    strengths = new Array(n);
	    for (i = 0; i < n; ++i) strengths[i] = +strength(nodes[i], i, nodes);
	  }

	  function accumulate(quad) {
	    var strength = 0,
	        q,
	        c,
	        x,
	        y,
	        i;

	    // For internal nodes, accumulate forces from child quadrants.
	    if (quad.length) {
	      for (x = y = i = 0; i < 4; ++i) {
	        if ((q = quad[i]) && (c = q.value)) {
	          strength += c, x += c * q.x, y += c * q.y;
	        }
	      }
	      quad.x = x / strength;
	      quad.y = y / strength;
	    }

	    // For leaf nodes, accumulate forces from coincident quadrants.
	    else {
	        q = quad;
	        q.x = q.data.x;
	        q.y = q.data.y;
	        do strength += strengths[q.data.index]; while (q = q.next);
	      }

	    quad.value = strength;
	  }

	  function apply(quad, x1, _, x2) {
	    if (!quad.value) return true;

	    var x = quad.x - node.x,
	        y = quad.y - node.y,
	        w = x2 - x1,
	        l = x * x + y * y;

	    // Apply the Barnes-Hut approximation if possible.
	    // Limit forces for very close nodes; randomize direction if coincident.
	    if (w * w / theta2 < l) {
	      if (l < distanceMax2) {
	        if (x === 0) x = jiggle(), l += x * x;
	        if (y === 0) y = jiggle(), l += y * y;
	        if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
	        node.vx += x * quad.value * alpha / l;
	        node.vy += y * quad.value * alpha / l;
	      }
	      return true;
	    }

	    // Otherwise, process points directly.
	    else if (quad.length || l >= distanceMax2) return;

	    // Limit forces for very close nodes; randomize direction if coincident.
	    if (quad.data !== node || quad.next) {
	      if (x === 0) x = jiggle(), l += x * x;
	      if (y === 0) y = jiggle(), l += y * y;
	      if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
	    }

	    do if (quad.data !== node) {
	      w = strengths[quad.data.index] * alpha / l;
	      node.vx += x * w;
	      node.vy += y * w;
	    } while (quad = quad.next);
	  }

	  force.initialize = function (_) {
	    nodes = _;
	    initialize();
	  };

	  force.strength = function (_) {
	    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
	  };

	  force.distanceMin = function (_) {
	    return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
	  };

	  force.distanceMax = function (_) {
	    return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
	  };

	  force.theta = function (_) {
	    return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
	  };

	  return force;
	}

	function forceX (x) {
	  var strength = constant$6(0.1),
	      nodes,
	      strengths,
	      xz;

	  if (typeof x !== "function") x = constant$6(x == null ? 0 : +x);

	  function force(alpha) {
	    for (var i = 0, n = nodes.length, node; i < n; ++i) {
	      node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;
	    }
	  }

	  function initialize() {
	    if (!nodes) return;
	    var i,
	        n = nodes.length;
	    strengths = new Array(n);
	    xz = new Array(n);
	    for (i = 0; i < n; ++i) {
	      strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
	    }
	  }

	  force.initialize = function (_) {
	    nodes = _;
	    initialize();
	  };

	  force.strength = function (_) {
	    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
	  };

	  force.x = function (_) {
	    return arguments.length ? (x = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : x;
	  };

	  return force;
	}

	function forceY (y) {
	  var strength = constant$6(0.1),
	      nodes,
	      strengths,
	      yz;

	  if (typeof y !== "function") y = constant$6(y == null ? 0 : +y);

	  function force(alpha) {
	    for (var i = 0, n = nodes.length, node; i < n; ++i) {
	      node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;
	    }
	  }

	  function initialize() {
	    if (!nodes) return;
	    var i,
	        n = nodes.length;
	    strengths = new Array(n);
	    yz = new Array(n);
	    for (i = 0; i < n; ++i) {
	      strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
	    }
	  }

	  force.initialize = function (_) {
	    nodes = _;
	    initialize();
	  };

	  force.strength = function (_) {
	    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
	  };

	  force.y = function (_) {
	    return arguments.length ? (y = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : y;
	  };

	  return force;
	}

	function nopropagation() {
	  event.stopImmediatePropagation();
	}

	function noevent () {
	  event.preventDefault();
	  event.stopImmediatePropagation();
	}

	function dragDisable (view) {
	  var root = view.document.documentElement,
	      selection = select(view).on("dragstart.drag", noevent, true);
	  if ("onselectstart" in root) {
	    selection.on("selectstart.drag", noevent, true);
	  } else {
	    root.__noselect = root.style.MozUserSelect;
	    root.style.MozUserSelect = "none";
	  }
	}

	function dragEnable(view, noclick) {
	  var root = view.document.documentElement,
	      selection = select(view).on("dragstart.drag", null);
	  if (noclick) {
	    selection.on("click.drag", noevent, true);
	    setTimeout(function () {
	      selection.on("click.drag", null);
	    }, 0);
	  }
	  if ("onselectstart" in root) {
	    selection.on("selectstart.drag", null);
	  } else {
	    root.style.MozUserSelect = root.__noselect;
	    delete root.__noselect;
	  }
	}

	function constant$7 (x) {
	  return function () {
	    return x;
	  };
	}

	function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
	  this.target = target;
	  this.type = type;
	  this.subject = subject;
	  this.identifier = id;
	  this.active = active;
	  this.x = x;
	  this.y = y;
	  this.dx = dx;
	  this.dy = dy;
	  this._ = dispatch;
	}

	DragEvent.prototype.on = function () {
	  var value = this._.on.apply(this._, arguments);
	  return value === this._ ? this : value;
	};

	// Ignore right-click, since that should open the context menu.
	function defaultFilter() {
	  return !event.button;
	}

	function defaultContainer() {
	  return this.parentNode;
	}

	function defaultSubject(d) {
	  return d == null ? { x: event.x, y: event.y } : d;
	}

	function drag () {
	  var filter = defaultFilter,
	      container = defaultContainer,
	      subject = defaultSubject,
	      gestures = {},
	      listeners = dispatch("start", "drag", "end"),
	      active = 0,
	      mousemoving,
	      touchending;

	  function drag(selection) {
	    selection.on("mousedown.drag", mousedowned).on("touchstart.drag", touchstarted).on("touchmove.drag", touchmoved).on("touchend.drag touchcancel.drag", touchended).style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
	  }

	  function mousedowned() {
	    if (touchending || !filter.apply(this, arguments)) return;
	    var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
	    if (!gesture) return;
	    select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
	    dragDisable(event.view);
	    nopropagation();
	    mousemoving = false;
	    gesture("start");
	  }

	  function mousemoved() {
	    noevent();
	    mousemoving = true;
	    gestures.mouse("drag");
	  }

	  function mouseupped() {
	    select(event.view).on("mousemove.drag mouseup.drag", null);
	    dragEnable(event.view, mousemoving);
	    noevent();
	    gestures.mouse("end");
	  }

	  function touchstarted() {
	    if (!filter.apply(this, arguments)) return;
	    var touches = event.changedTouches,
	        c = container.apply(this, arguments),
	        n = touches.length,
	        i,
	        gesture;

	    for (i = 0; i < n; ++i) {
	      if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments)) {
	        nopropagation();
	        gesture("start");
	      }
	    }
	  }

	  function touchmoved() {
	    var touches = event.changedTouches,
	        n = touches.length,
	        i,
	        gesture;

	    for (i = 0; i < n; ++i) {
	      if (gesture = gestures[touches[i].identifier]) {
	        noevent();
	        gesture("drag");
	      }
	    }
	  }

	  function touchended() {
	    var touches = event.changedTouches,
	        n = touches.length,
	        i,
	        gesture;

	    if (touchending) clearTimeout(touchending);
	    touchending = setTimeout(function () {
	      touchending = null;
	    }, 500); // Ghost clicks are delayed!
	    for (i = 0; i < n; ++i) {
	      if (gesture = gestures[touches[i].identifier]) {
	        nopropagation();
	        gesture("end");
	      }
	    }
	  }

	  function beforestart(id, container, point, that, args) {
	    var p = point(container, id),
	        s,
	        dx,
	        dy,
	        sublisteners = listeners.copy();

	    if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function () {
	      if ((event.subject = s = subject.apply(that, args)) == null) return false;
	      dx = s.x - p[0] || 0;
	      dy = s.y - p[1] || 0;
	      return true;
	    })) return;

	    return function gesture(type) {
	      var p0 = p,
	          n;
	      switch (type) {
	        case "start":
	          gestures[id] = gesture, n = active++;break;
	        case "end":
	          delete gestures[id], --active; // nobreak
	        case "drag":
	          p = point(container, id), n = active;break;
	      }
	      customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
	    };
	  }

	  drag.filter = function (_) {
	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$7(!!_), drag) : filter;
	  };

	  drag.container = function (_) {
	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$7(_), drag) : container;
	  };

	  drag.subject = function (_) {
	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$7(_), drag) : subject;
	  };

	  drag.on = function () {
	    var value = listeners.on.apply(listeners, arguments);
	    return value === listeners ? drag : value;
	  };

	  return drag;
	}

	function constant$8 (x) {
	  return function () {
	    return x;
	  };
	}

	function x$3(d) {
	  return d[0];
	}

	function y$3(d) {
	  return d[1];
	}

	function RedBlackTree() {
	  this._ = null; // root node
	}

	function RedBlackNode(node) {
	  node.U = // parent node
	  node.C = // color - true for red, false for black
	  node.L = // left node
	  node.R = // right node
	  node.P = // previous node
	  node.N = null; // next node
	}

	RedBlackTree.prototype = {
	  constructor: RedBlackTree,

	  insert: function (after, node) {
	    var parent, grandpa, uncle;

	    if (after) {
	      node.P = after;
	      node.N = after.N;
	      if (after.N) after.N.P = node;
	      after.N = node;
	      if (after.R) {
	        after = after.R;
	        while (after.L) after = after.L;
	        after.L = node;
	      } else {
	        after.R = node;
	      }
	      parent = after;
	    } else if (this._) {
	      after = RedBlackFirst(this._);
	      node.P = null;
	      node.N = after;
	      after.P = after.L = node;
	      parent = after;
	    } else {
	      node.P = node.N = null;
	      this._ = node;
	      parent = null;
	    }
	    node.L = node.R = null;
	    node.U = parent;
	    node.C = true;

	    after = node;
	    while (parent && parent.C) {
	      grandpa = parent.U;
	      if (parent === grandpa.L) {
	        uncle = grandpa.R;
	        if (uncle && uncle.C) {
	          parent.C = uncle.C = false;
	          grandpa.C = true;
	          after = grandpa;
	        } else {
	          if (after === parent.R) {
	            RedBlackRotateLeft(this, parent);
	            after = parent;
	            parent = after.U;
	          }
	          parent.C = false;
	          grandpa.C = true;
	          RedBlackRotateRight(this, grandpa);
	        }
	      } else {
	        uncle = grandpa.L;
	        if (uncle && uncle.C) {
	          parent.C = uncle.C = false;
	          grandpa.C = true;
	          after = grandpa;
	        } else {
	          if (after === parent.L) {
	            RedBlackRotateRight(this, parent);
	            after = parent;
	            parent = after.U;
	          }
	          parent.C = false;
	          grandpa.C = true;
	          RedBlackRotateLeft(this, grandpa);
	        }
	      }
	      parent = after.U;
	    }
	    this._.C = false;
	  },

	  remove: function (node) {
	    if (node.N) node.N.P = node.P;
	    if (node.P) node.P.N = node.N;
	    node.N = node.P = null;

	    var parent = node.U,
	        sibling,
	        left = node.L,
	        right = node.R,
	        next,
	        red;

	    if (!left) next = right;else if (!right) next = left;else next = RedBlackFirst(right);

	    if (parent) {
	      if (parent.L === node) parent.L = next;else parent.R = next;
	    } else {
	      this._ = next;
	    }

	    if (left && right) {
	      red = next.C;
	      next.C = node.C;
	      next.L = left;
	      left.U = next;
	      if (next !== right) {
	        parent = next.U;
	        next.U = node.U;
	        node = next.R;
	        parent.L = node;
	        next.R = right;
	        right.U = next;
	      } else {
	        next.U = parent;
	        parent = next;
	        node = next.R;
	      }
	    } else {
	      red = node.C;
	      node = next;
	    }

	    if (node) node.U = parent;
	    if (red) return;
	    if (node && node.C) {
	      node.C = false;return;
	    }

	    do {
	      if (node === this._) break;
	      if (node === parent.L) {
	        sibling = parent.R;
	        if (sibling.C) {
	          sibling.C = false;
	          parent.C = true;
	          RedBlackRotateLeft(this, parent);
	          sibling = parent.R;
	        }
	        if (sibling.L && sibling.L.C || sibling.R && sibling.R.C) {
	          if (!sibling.R || !sibling.R.C) {
	            sibling.L.C = false;
	            sibling.C = true;
	            RedBlackRotateRight(this, sibling);
	            sibling = parent.R;
	          }
	          sibling.C = parent.C;
	          parent.C = sibling.R.C = false;
	          RedBlackRotateLeft(this, parent);
	          node = this._;
	          break;
	        }
	      } else {
	        sibling = parent.L;
	        if (sibling.C) {
	          sibling.C = false;
	          parent.C = true;
	          RedBlackRotateRight(this, parent);
	          sibling = parent.L;
	        }
	        if (sibling.L && sibling.L.C || sibling.R && sibling.R.C) {
	          if (!sibling.L || !sibling.L.C) {
	            sibling.R.C = false;
	            sibling.C = true;
	            RedBlackRotateLeft(this, sibling);
	            sibling = parent.L;
	          }
	          sibling.C = parent.C;
	          parent.C = sibling.L.C = false;
	          RedBlackRotateRight(this, parent);
	          node = this._;
	          break;
	        }
	      }
	      sibling.C = true;
	      node = parent;
	      parent = parent.U;
	    } while (!node.C);

	    if (node) node.C = false;
	  }
	};

	function RedBlackRotateLeft(tree, node) {
	  var p = node,
	      q = node.R,
	      parent = p.U;

	  if (parent) {
	    if (parent.L === p) parent.L = q;else parent.R = q;
	  } else {
	    tree._ = q;
	  }

	  q.U = parent;
	  p.U = q;
	  p.R = q.L;
	  if (p.R) p.R.U = p;
	  q.L = p;
	}

	function RedBlackRotateRight(tree, node) {
	  var p = node,
	      q = node.L,
	      parent = p.U;

	  if (parent) {
	    if (parent.L === p) parent.L = q;else parent.R = q;
	  } else {
	    tree._ = q;
	  }

	  q.U = parent;
	  p.U = q;
	  p.L = q.R;
	  if (p.L) p.L.U = p;
	  q.R = p;
	}

	function RedBlackFirst(node) {
	  while (node.L) node = node.L;
	  return node;
	}

	function createEdge(left, right, v0, v1) {
	  var edge = [null, null],
	      index = edges.push(edge) - 1;
	  edge.left = left;
	  edge.right = right;
	  if (v0) setEdgeEnd(edge, left, right, v0);
	  if (v1) setEdgeEnd(edge, right, left, v1);
	  cells[left.index].halfedges.push(index);
	  cells[right.index].halfedges.push(index);
	  return edge;
	}

	function createBorderEdge(left, v0, v1) {
	  var edge = [v0, v1];
	  edge.left = left;
	  return edge;
	}

	function setEdgeEnd(edge, left, right, vertex) {
	  if (!edge[0] && !edge[1]) {
	    edge[0] = vertex;
	    edge.left = left;
	    edge.right = right;
	  } else if (edge.left === right) {
	    edge[1] = vertex;
	  } else {
	    edge[0] = vertex;
	  }
	}

	// Liang–Barsky line clipping.
	function clipEdge(edge, x0, y0, x1, y1) {
	  var a = edge[0],
	      b = edge[1],
	      ax = a[0],
	      ay = a[1],
	      bx = b[0],
	      by = b[1],
	      t0 = 0,
	      t1 = 1,
	      dx = bx - ax,
	      dy = by - ay,
	      r;

	  r = x0 - ax;
	  if (!dx && r > 0) return;
	  r /= dx;
	  if (dx < 0) {
	    if (r < t0) return;
	    if (r < t1) t1 = r;
	  } else if (dx > 0) {
	    if (r > t1) return;
	    if (r > t0) t0 = r;
	  }

	  r = x1 - ax;
	  if (!dx && r < 0) return;
	  r /= dx;
	  if (dx < 0) {
	    if (r > t1) return;
	    if (r > t0) t0 = r;
	  } else if (dx > 0) {
	    if (r < t0) return;
	    if (r < t1) t1 = r;
	  }

	  r = y0 - ay;
	  if (!dy && r > 0) return;
	  r /= dy;
	  if (dy < 0) {
	    if (r < t0) return;
	    if (r < t1) t1 = r;
	  } else if (dy > 0) {
	    if (r > t1) return;
	    if (r > t0) t0 = r;
	  }

	  r = y1 - ay;
	  if (!dy && r < 0) return;
	  r /= dy;
	  if (dy < 0) {
	    if (r > t1) return;
	    if (r > t0) t0 = r;
	  } else if (dy > 0) {
	    if (r < t0) return;
	    if (r < t1) t1 = r;
	  }

	  if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check?

	  if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy];
	  if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy];
	  return true;
	}

	function connectEdge(edge, x0, y0, x1, y1) {
	  var v1 = edge[1];
	  if (v1) return true;

	  var v0 = edge[0],
	      left = edge.left,
	      right = edge.right,
	      lx = left[0],
	      ly = left[1],
	      rx = right[0],
	      ry = right[1],
	      fx = (lx + rx) / 2,
	      fy = (ly + ry) / 2,
	      fm,
	      fb;

	  if (ry === ly) {
	    if (fx < x0 || fx >= x1) return;
	    if (lx > rx) {
	      if (!v0) v0 = [fx, y0];else if (v0[1] >= y1) return;
	      v1 = [fx, y1];
	    } else {
	      if (!v0) v0 = [fx, y1];else if (v0[1] < y0) return;
	      v1 = [fx, y0];
	    }
	  } else {
	    fm = (lx - rx) / (ry - ly);
	    fb = fy - fm * fx;
	    if (fm < -1 || fm > 1) {
	      if (lx > rx) {
	        if (!v0) v0 = [(y0 - fb) / fm, y0];else if (v0[1] >= y1) return;
	        v1 = [(y1 - fb) / fm, y1];
	      } else {
	        if (!v0) v0 = [(y1 - fb) / fm, y1];else if (v0[1] < y0) return;
	        v1 = [(y0 - fb) / fm, y0];
	      }
	    } else {
	      if (ly < ry) {
	        if (!v0) v0 = [x0, fm * x0 + fb];else if (v0[0] >= x1) return;
	        v1 = [x1, fm * x1 + fb];
	      } else {
	        if (!v0) v0 = [x1, fm * x1 + fb];else if (v0[0] < x0) return;
	        v1 = [x0, fm * x0 + fb];
	      }
	    }
	  }

	  edge[0] = v0;
	  edge[1] = v1;
	  return true;
	}

	function clipEdges(x0, y0, x1, y1) {
	  var i = edges.length,
	      edge;

	  while (i--) {
	    if (!connectEdge(edge = edges[i], x0, y0, x1, y1) || !clipEdge(edge, x0, y0, x1, y1) || !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$3 || Math.abs(edge[0][1] - edge[1][1]) > epsilon$3)) {
	      delete edges[i];
	    }
	  }
	}

	function createCell(site) {
	  return cells[site.index] = {
	    site: site,
	    halfedges: []
	  };
	}

	function cellHalfedgeAngle(cell, edge) {
	  var site = cell.site,
	      va = edge.left,
	      vb = edge.right;
	  if (site === vb) vb = va, va = site;
	  if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]);
	  if (site === va) va = edge[1], vb = edge[0];else va = edge[0], vb = edge[1];
	  return Math.atan2(va[0] - vb[0], vb[1] - va[1]);
	}

	function cellHalfedgeStart(cell, edge) {
	  return edge[+(edge.left !== cell.site)];
	}

	function cellHalfedgeEnd(cell, edge) {
	  return edge[+(edge.left === cell.site)];
	}

	function sortCellHalfedges() {
	  for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) {
	    if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) {
	      var index = new Array(m),
	          array = new Array(m);
	      for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]);
	      index.sort(function (i, j) {
	        return array[j] - array[i];
	      });
	      for (j = 0; j < m; ++j) array[j] = halfedges[index[j]];
	      for (j = 0; j < m; ++j) halfedges[j] = array[j];
	    }
	  }
	}

	function clipCells(x0, y0, x1, y1) {
	  var nCells = cells.length,
	      iCell,
	      cell,
	      site,
	      iHalfedge,
	      halfedges,
	      nHalfedges,
	      start,
	      startX,
	      startY,
	      end,
	      endX,
	      endY,
	      cover = true;

	  for (iCell = 0; iCell < nCells; ++iCell) {
	    if (cell = cells[iCell]) {
	      site = cell.site;
	      halfedges = cell.halfedges;
	      iHalfedge = halfedges.length;

	      // Remove any dangling clipped edges.
	      while (iHalfedge--) {
	        if (!edges[halfedges[iHalfedge]]) {
	          halfedges.splice(iHalfedge, 1);
	        }
	      }

	      // Insert any border edges as necessary.
	      iHalfedge = 0, nHalfedges = halfedges.length;
	      while (iHalfedge < nHalfedges) {
	        end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1];
	        start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1];
	        if (Math.abs(endX - startX) > epsilon$3 || Math.abs(endY - startY) > epsilon$3) {
	          halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end, Math.abs(endX - x0) < epsilon$3 && y1 - endY > epsilon$3 ? [x0, Math.abs(startX - x0) < epsilon$3 ? startY : y1] : Math.abs(endY - y1) < epsilon$3 && x1 - endX > epsilon$3 ? [Math.abs(startY - y1) < epsilon$3 ? startX : x1, y1] : Math.abs(endX - x1) < epsilon$3 && endY - y0 > epsilon$3 ? [x1, Math.abs(startX - x1) < epsilon$3 ? startY : y0] : Math.abs(endY - y0) < epsilon$3 && endX - x0 > epsilon$3 ? [Math.abs(startY - y0) < epsilon$3 ? startX : x0, y0] : null)) - 1);
	          ++nHalfedges;
	        }
	      }

	      if (nHalfedges) cover = false;
	    }
	  }

	  // If there weren’t any edges, have the closest site cover the extent.
	  // It doesn’t matter which corner of the extent we measure!
	  if (cover) {
	    var dx,
	        dy,
	        d2,
	        dc = Infinity;

	    for (iCell = 0, cover = null; iCell < nCells; ++iCell) {
	      if (cell = cells[iCell]) {
	        site = cell.site;
	        dx = site[0] - x0;
	        dy = site[1] - y0;
	        d2 = dx * dx + dy * dy;
	        if (d2 < dc) dc = d2, cover = cell;
	      }
	    }

	    if (cover) {
	      var v00 = [x0, y0],
	          v01 = [x0, y1],
	          v11 = [x1, y1],
	          v10 = [x1, y0];
	      cover.halfedges.push(edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1, edges.push(createBorderEdge(site, v01, v11)) - 1, edges.push(createBorderEdge(site, v11, v10)) - 1, edges.push(createBorderEdge(site, v10, v00)) - 1);
	    }
	  }

	  // Lastly delete any cells with no edges; these were entirely clipped.
	  for (iCell = 0; iCell < nCells; ++iCell) {
	    if (cell = cells[iCell]) {
	      if (!cell.halfedges.length) {
	        delete cells[iCell];
	      }
	    }
	  }
	}

	var circlePool = [];

	var firstCircle;

	function Circle() {
	  RedBlackNode(this);
	  this.x = this.y = this.arc = this.site = this.cy = null;
	}

	function attachCircle(arc) {
	  var lArc = arc.P,
	      rArc = arc.N;

	  if (!lArc || !rArc) return;

	  var lSite = lArc.site,
	      cSite = arc.site,
	      rSite = rArc.site;

	  if (lSite === rSite) return;

	  var bx = cSite[0],
	      by = cSite[1],
	      ax = lSite[0] - bx,
	      ay = lSite[1] - by,
	      cx = rSite[0] - bx,
	      cy = rSite[1] - by;

	  var d = 2 * (ax * cy - ay * cx);
	  if (d >= -epsilon2$1) return;

	  var ha = ax * ax + ay * ay,
	      hc = cx * cx + cy * cy,
	      x = (cy * ha - ay * hc) / d,
	      y = (ax * hc - cx * ha) / d;

	  var circle = circlePool.pop() || new Circle();
	  circle.arc = arc;
	  circle.site = cSite;
	  circle.x = x + bx;
	  circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom

	  arc.circle = circle;

	  var before = null,
	      node = circles._;

	  while (node) {
	    if (circle.y < node.y || circle.y === node.y && circle.x <= node.x) {
	      if (node.L) node = node.L;else {
	        before = node.P;break;
	      }
	    } else {
	      if (node.R) node = node.R;else {
	        before = node;break;
	      }
	    }
	  }

	  circles.insert(before, circle);
	  if (!before) firstCircle = circle;
	}

	function detachCircle(arc) {
	  var circle = arc.circle;
	  if (circle) {
	    if (!circle.P) firstCircle = circle.N;
	    circles.remove(circle);
	    circlePool.push(circle);
	    RedBlackNode(circle);
	    arc.circle = null;
	  }
	}

	var beachPool = [];

	function Beach() {
	  RedBlackNode(this);
	  this.edge = this.site = this.circle = null;
	}

	function createBeach(site) {
	  var beach = beachPool.pop() || new Beach();
	  beach.site = site;
	  return beach;
	}

	function detachBeach(beach) {
	  detachCircle(beach);
	  beaches.remove(beach);
	  beachPool.push(beach);
	  RedBlackNode(beach);
	}

	function removeBeach(beach) {
	  var circle = beach.circle,
	      x = circle.x,
	      y = circle.cy,
	      vertex = [x, y],
	      previous = beach.P,
	      next = beach.N,
	      disappearing = [beach];

	  detachBeach(beach);

	  var lArc = previous;
	  while (lArc.circle && Math.abs(x - lArc.circle.x) < epsilon$3 && Math.abs(y - lArc.circle.cy) < epsilon$3) {
	    previous = lArc.P;
	    disappearing.unshift(lArc);
	    detachBeach(lArc);
	    lArc = previous;
	  }

	  disappearing.unshift(lArc);
	  detachCircle(lArc);

	  var rArc = next;
	  while (rArc.circle && Math.abs(x - rArc.circle.x) < epsilon$3 && Math.abs(y - rArc.circle.cy) < epsilon$3) {
	    next = rArc.N;
	    disappearing.push(rArc);
	    detachBeach(rArc);
	    rArc = next;
	  }

	  disappearing.push(rArc);
	  detachCircle(rArc);

	  var nArcs = disappearing.length,
	      iArc;
	  for (iArc = 1; iArc < nArcs; ++iArc) {
	    rArc = disappearing[iArc];
	    lArc = disappearing[iArc - 1];
	    setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);
	  }

	  lArc = disappearing[0];
	  rArc = disappearing[nArcs - 1];
	  rArc.edge = createEdge(lArc.site, rArc.site, null, vertex);

	  attachCircle(lArc);
	  attachCircle(rArc);
	}

	function addBeach(site) {
	  var x = site[0],
	      directrix = site[1],
	      lArc,
	      rArc,
	      dxl,
	      dxr,
	      node = beaches._;

	  while (node) {
	    dxl = leftBreakPoint(node, directrix) - x;
	    if (dxl > epsilon$3) node = node.L;else {
	      dxr = x - rightBreakPoint(node, directrix);
	      if (dxr > epsilon$3) {
	        if (!node.R) {
	          lArc = node;
	          break;
	        }
	        node = node.R;
	      } else {
	        if (dxl > -epsilon$3) {
	          lArc = node.P;
	          rArc = node;
	        } else if (dxr > -epsilon$3) {
	          lArc = node;
	          rArc = node.N;
	        } else {
	          lArc = rArc = node;
	        }
	        break;
	      }
	    }
	  }

	  createCell(site);
	  var newArc = createBeach(site);
	  beaches.insert(lArc, newArc);

	  if (!lArc && !rArc) return;

	  if (lArc === rArc) {
	    detachCircle(lArc);
	    rArc = createBeach(lArc.site);
	    beaches.insert(newArc, rArc);
	    newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site);
	    attachCircle(lArc);
	    attachCircle(rArc);
	    return;
	  }

	  if (!rArc) {
	    // && lArc
	    newArc.edge = createEdge(lArc.site, newArc.site);
	    return;
	  }

	  // else lArc !== rArc
	  detachCircle(lArc);
	  detachCircle(rArc);

	  var lSite = lArc.site,
	      ax = lSite[0],
	      ay = lSite[1],
	      bx = site[0] - ax,
	      by = site[1] - ay,
	      rSite = rArc.site,
	      cx = rSite[0] - ax,
	      cy = rSite[1] - ay,
	      d = 2 * (bx * cy - by * cx),
	      hb = bx * bx + by * by,
	      hc = cx * cx + cy * cy,
	      vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay];

	  setEdgeEnd(rArc.edge, lSite, rSite, vertex);
	  newArc.edge = createEdge(lSite, site, null, vertex);
	  rArc.edge = createEdge(site, rSite, null, vertex);
	  attachCircle(lArc);
	  attachCircle(rArc);
	}

	function leftBreakPoint(arc, directrix) {
	  var site = arc.site,
	      rfocx = site[0],
	      rfocy = site[1],
	      pby2 = rfocy - directrix;

	  if (!pby2) return rfocx;

	  var lArc = arc.P;
	  if (!lArc) return -Infinity;

	  site = lArc.site;
	  var lfocx = site[0],
	      lfocy = site[1],
	      plby2 = lfocy - directrix;

	  if (!plby2) return lfocx;

	  var hl = lfocx - rfocx,
	      aby2 = 1 / pby2 - 1 / plby2,
	      b = hl / plby2;

	  if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;

	  return (rfocx + lfocx) / 2;
	}

	function rightBreakPoint(arc, directrix) {
	  var rArc = arc.N;
	  if (rArc) return leftBreakPoint(rArc, directrix);
	  var site = arc.site;
	  return site[1] === directrix ? site[0] : Infinity;
	}

	var epsilon$3 = 1e-6;
	var epsilon2$1 = 1e-12;
	var beaches;
	var cells;
	var circles;
	var edges;

	function triangleArea(a, b, c) {
	  return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]);
	}

	function lexicographic(a, b) {
	  return b[1] - a[1] || b[0] - a[0];
	}

	function Diagram(sites, extent) {
	  var site = sites.sort(lexicographic).pop(),
	      x,
	      y,
	      circle;

	  edges = [];
	  cells = new Array(sites.length);
	  beaches = new RedBlackTree();
	  circles = new RedBlackTree();

	  while (true) {
	    circle = firstCircle;
	    if (site && (!circle || site[1] < circle.y || site[1] === circle.y && site[0] < circle.x)) {
	      if (site[0] !== x || site[1] !== y) {
	        addBeach(site);
	        x = site[0], y = site[1];
	      }
	      site = sites.pop();
	    } else if (circle) {
	      removeBeach(circle.arc);
	    } else {
	      break;
	    }
	  }

	  sortCellHalfedges();

	  if (extent) {
	    var x0 = +extent[0][0],
	        y0 = +extent[0][1],
	        x1 = +extent[1][0],
	        y1 = +extent[1][1];
	    clipEdges(x0, y0, x1, y1);
	    clipCells(x0, y0, x1, y1);
	  }

	  this.edges = edges;
	  this.cells = cells;

	  beaches = circles = edges = cells = null;
	}

	Diagram.prototype = {
	  constructor: Diagram,

	  polygons: function () {
	    var edges = this.edges;

	    return this.cells.map(function (cell) {
	      var polygon = cell.halfedges.map(function (i) {
	        return cellHalfedgeStart(cell, edges[i]);
	      });
	      polygon.data = cell.site.data;
	      return polygon;
	    });
	  },

	  triangles: function () {
	    var triangles = [],
	        edges = this.edges;

	    this.cells.forEach(function (cell, i) {
	      var site = cell.site,
	          halfedges = cell.halfedges,
	          j = -1,
	          m = halfedges.length,
	          s0,
	          e1 = edges[halfedges[m - 1]],
	          s1 = e1.left === site ? e1.right : e1.left;

	      while (++j < m) {
	        s0 = s1;
	        e1 = edges[halfedges[j]];
	        s1 = e1.left === site ? e1.right : e1.left;
	        if (i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) {
	          triangles.push([site.data, s0.data, s1.data]);
	        }
	      }
	    });

	    return triangles;
	  },

	  links: function () {
	    return this.edges.filter(function (edge) {
	      return edge.right;
	    }).map(function (edge) {
	      return {
	        source: edge.left.data,
	        target: edge.right.data
	      };
	    });
	  },

	  _found: 0,
	  find: function (x, y, radius) {
	    var diagram = this,
	        next = diagram._found,
	        cell = diagram.cells[next] || diagram.cells[next = 0],
	        dx = x - cell.site[0],
	        dy = y - cell.site[1],
	        dist = dx * dx + dy * dy,
	        i;

	    do {
	      cell = diagram.cells[i = next];
	      next = null;
	      cell.halfedges.forEach(function (e) {
	        var edge = diagram.edges[e];
	        var ea = edge.left;
	        if (ea === cell.site || !ea) {
	          ea = edge.right;
	        }
	        if (ea) {
	          var dx = x - ea[0],
	              dy = y - ea[1],
	              ndist = dx * dx + dy * dy;
	          if (ndist < dist) {
	            dist = ndist;
	            next = ea.index;
	            return;
	          }
	        }
	      });
	    } while (next !== null);

	    diagram._found = i;
	    if (!radius || dist < radius * radius) {
	      return cell.site;
	    } else {
	      return null;
	    }
	  }
	};

	function voronoi () {
	  var x = x$3,
	      y = y$3,
	      extent = null;

	  function voronoi(data) {
	    return new Diagram(data.map(function (d, i) {
	      var s = [Math.round(x(d, i, data) / epsilon$3) * epsilon$3, Math.round(y(d, i, data) / epsilon$3) * epsilon$3];
	      s.index = i;
	      s.data = d;
	      return s;
	    }), extent);
	  }

	  voronoi.polygons = function (data) {
	    return voronoi(data).polygons();
	  };

	  voronoi.links = function (data) {
	    return voronoi(data).links();
	  };

	  voronoi.triangles = function (data) {
	    return voronoi(data).triangles();
	  };

	  voronoi.x = function (_) {
	    return arguments.length ? (x = typeof _ === "function" ? _ : constant$8(+_), voronoi) : x;
	  };

	  voronoi.y = function (_) {
	    return arguments.length ? (y = typeof _ === "function" ? _ : constant$8(+_), voronoi) : y;
	  };

	  voronoi.extent = function (_) {
	    return arguments.length ? (extent = _ == null ? null : [[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]], voronoi) : extent && [[extent[0][0], extent[0][1]], [extent[1][0], extent[1][1]]];
	  };

	  voronoi.size = function (_) {
	    return arguments.length ? (extent = _ == null ? null : [[0, 0], [+_[0], +_[1]]], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]];
	  };

	  return voronoi;
	}

	function constant$9 (x) {
	  return function () {
	    return x;
	  };
	}

	function ZoomEvent(target, type, transform) {
	  this.target = target;
	  this.type = type;
	  this.transform = transform;
	}

	function Transform(k, x, y) {
	  this.k = k;
	  this.x = x;
	  this.y = y;
	}

	Transform.prototype = {
	  constructor: Transform,
	  scale: function (k) {
	    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
	  },
	  translate: function (x, y) {
	    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
	  },
	  apply: function (point) {
	    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
	  },
	  applyX: function (x) {
	    return x * this.k + this.x;
	  },
	  applyY: function (y) {
	    return y * this.k + this.y;
	  },
	  invert: function (location) {
	    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
	  },
	  invertX: function (x) {
	    return (x - this.x) / this.k;
	  },
	  invertY: function (y) {
	    return (y - this.y) / this.k;
	  },
	  rescaleX: function (x) {
	    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
	  },
	  rescaleY: function (y) {
	    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
	  },
	  toString: function () {
	    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
	  }
	};

	var identity$6 = new Transform(1, 0, 0);

	transform.prototype = Transform.prototype;

	function transform(node) {
	  return node.__zoom || identity$6;
	}

	function nopropagation$1() {
	  event.stopImmediatePropagation();
	}

	function noevent$1 () {
	  event.preventDefault();
	  event.stopImmediatePropagation();
	}

	// Ignore right-click, since that should open the context menu.
	function defaultFilter$1() {
	  return !event.button;
	}

	function defaultExtent() {
	  var e = this,
	      w,
	      h;
	  if (e instanceof SVGElement) {
	    e = e.ownerSVGElement || e;
	    w = e.width.baseVal.value;
	    h = e.height.baseVal.value;
	  } else {
	    w = e.clientWidth;
	    h = e.clientHeight;
	  }
	  return [[0, 0], [w, h]];
	}

	function defaultTransform() {
	  return this.__zoom || identity$6;
	}

	function zoom () {
	  var filter = defaultFilter$1,
	      extent = defaultExtent,
	      k0 = 0,
	      k1 = Infinity,
	      x0 = -k1,
	      x1 = k1,
	      y0 = x0,
	      y1 = x1,
	      duration = 250,
	      gestures = [],
	      listeners = dispatch("start", "zoom", "end"),
	      touchstarting,
	      touchending,
	      touchDelay = 500,
	      wheelDelay = 150;

	  function zoom(selection) {
	    selection.on("wheel.zoom", wheeled).on("mousedown.zoom", mousedowned).on("dblclick.zoom", dblclicked).on("touchstart.zoom", touchstarted).on("touchmove.zoom", touchmoved).on("touchend.zoom touchcancel.zoom", touchended).style("-webkit-tap-highlight-color", "rgba(0,0,0,0)").property("__zoom", defaultTransform);
	  }

	  zoom.transform = function (collection, transform) {
	    var selection = collection.selection ? collection.selection() : collection;
	    selection.property("__zoom", defaultTransform);
	    if (collection !== selection) {
	      schedule(collection, transform);
	    } else {
	      selection.interrupt().each(function () {
	        gesture(this, arguments).start().zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform).end();
	      });
	    }
	  };

	  zoom.scaleBy = function (selection, k) {
	    zoom.scaleTo(selection, function () {
	      var k0 = this.__zoom.k,
	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
	      return k0 * k1;
	    });
	  };

	  zoom.scaleTo = function (selection, k) {
	    zoom.transform(selection, function () {
	      var e = extent.apply(this, arguments),
	          t0 = this.__zoom,
	          p0 = centroid(e),
	          p1 = t0.invert(p0),
	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
	      return constrain(translate(scale(t0, k1), p0, p1), e);
	    });
	  };

	  zoom.translateBy = function (selection, x, y) {
	    zoom.transform(selection, function () {
	      return constrain(this.__zoom.translate(typeof x === "function" ? x.apply(this, arguments) : x, typeof y === "function" ? y.apply(this, arguments) : y), extent.apply(this, arguments));
	    });
	  };

	  function scale(transform, k) {
	    k = Math.max(k0, Math.min(k1, k));
	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
	  }

	  function translate(transform, p0, p1) {
	    var x = p0[0] - p1[0] * transform.k,
	        y = p0[1] - p1[1] * transform.k;
	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
	  }

	  function constrain(transform, extent) {
	    var dx = Math.min(0, transform.invertX(extent[0][0]) - x0) || Math.max(0, transform.invertX(extent[1][0]) - x1),
	        dy = Math.min(0, transform.invertY(extent[0][1]) - y0) || Math.max(0, transform.invertY(extent[1][1]) - y1);
	    return dx || dy ? transform.translate(dx, dy) : transform;
	  }

	  function centroid(extent) {
	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
	  }

	  function schedule(transition, transform, center) {
	    transition.on("start.zoom", function () {
	      gesture(this, arguments).start();
	    }).on("interrupt.zoom end.zoom", function () {
	      gesture(this, arguments).end();
	    }).tween("zoom", function () {
	      var that = this,
	          args = arguments,
	          g = gesture(that, args),
	          e = extent.apply(that, args),
	          p = center || centroid(e),
	          w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
	          a = that.__zoom,
	          b = typeof transform === "function" ? transform.apply(that, args) : transform,
	          i = interpolateZoom(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
	      return function (t) {
	        if (t === 1) t = b; // Avoid rounding error on end.
	        else {
	            var l = i(t),
	                k = w / l[2];t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
	          }
	        g.zoom(null, t);
	      };
	    });
	  }

	  function gesture(that, args) {
	    for (var i = 0, n = gestures.length, g; i < n; ++i) {
	      if ((g = gestures[i]).that === that) {
	        return g;
	      }
	    }
	    return new Gesture(that, args);
	  }

	  function Gesture(that, args) {
	    this.that = that;
	    this.args = args;
	    this.index = -1;
	    this.active = 0;
	    this.extent = extent.apply(that, args);
	  }

	  Gesture.prototype = {
	    start: function () {
	      if (++this.active === 1) {
	        this.index = gestures.push(this) - 1;
	        this.emit("start");
	      }
	      return this;
	    },
	    zoom: function (key, transform) {
	      if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
	      if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
	      if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
	      this.that.__zoom = transform;
	      this.emit("zoom");
	      return this;
	    },
	    end: function () {
	      if (--this.active === 0) {
	        gestures.splice(this.index, 1);
	        this.index = -1;
	        this.emit("end");
	      }
	      return this;
	    },
	    emit: function (type) {
	      customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
	    }
	  };

	  function wheeled() {
	    if (!filter.apply(this, arguments)) return;
	    var g = gesture(this, arguments),
	        t = this.__zoom,
	        k = Math.max(k0, Math.min(k1, t.k * Math.pow(2, -event.deltaY * (event.deltaMode ? 120 : 1) / 500))),
	        p = mouse(this);

	    // If the mouse is in the same location as before, reuse it.
	    // If there were recent wheel events, reset the wheel idle timeout.
	    if (g.wheel) {
	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
	        g.mouse[1] = t.invert(g.mouse[0] = p);
	      }
	      clearTimeout(g.wheel);
	    }

	    // If this wheel event won’t trigger a transform change, ignore it.
	    else if (t.k === k) return;

	      // Otherwise, capture the mouse point and location at the start.
	      else {
	          g.mouse = [p, t.invert(p)];
	          interrupt(this);
	          g.start();
	        }

	    noevent$1();
	    g.wheel = setTimeout(wheelidled, wheelDelay);
	    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent));

	    function wheelidled() {
	      g.wheel = null;
	      g.end();
	    }
	  }

	  function mousedowned() {
	    if (touchending || !filter.apply(this, arguments)) return;
	    var g = gesture(this, arguments),
	        v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
	        p = mouse(this);

	    dragDisable(event.view);
	    nopropagation$1();
	    g.mouse = [p, this.__zoom.invert(p)];
	    interrupt(this);
	    g.start();

	    function mousemoved() {
	      noevent$1();
	      g.moved = true;
	      g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent));
	    }

	    function mouseupped() {
	      v.on("mousemove.zoom mouseup.zoom", null);
	      dragEnable(event.view, g.moved);
	      noevent$1();
	      g.end();
	    }
	  }

	  function dblclicked() {
	    if (!filter.apply(this, arguments)) return;
	    var t0 = this.__zoom,
	        p0 = mouse(this),
	        p1 = t0.invert(p0),
	        k1 = t0.k * (event.shiftKey ? 0.5 : 2),
	        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments));

	    noevent$1();
	    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0);else select(this).call(zoom.transform, t1);
	  }

	  function touchstarted() {
	    if (!filter.apply(this, arguments)) return;
	    var g = gesture(this, arguments),
	        touches = event.changedTouches,
	        n = touches.length,
	        i,
	        t,
	        p;

	    nopropagation$1();
	    for (i = 0; i < n; ++i) {
	      t = touches[i], p = touch(this, touches, t.identifier);
	      p = [p, this.__zoom.invert(p), t.identifier];
	      if (!g.touch0) g.touch0 = p;else if (!g.touch1) g.touch1 = p;
	    }
	    if (touchstarting) {
	      touchstarting = clearTimeout(touchstarting);
	      if (!g.touch1) return g.end(), dblclicked.apply(this, arguments);
	    }
	    if (event.touches.length === n) {
	      touchstarting = setTimeout(function () {
	        touchstarting = null;
	      }, touchDelay);
	      interrupt(this);
	      g.start();
	    }
	  }

	  function touchmoved() {
	    var g = gesture(this, arguments),
	        touches = event.changedTouches,
	        n = touches.length,
	        i,
	        t,
	        p,
	        l;

	    noevent$1();
	    if (touchstarting) touchstarting = clearTimeout(touchstarting);
	    for (i = 0; i < n; ++i) {
	      t = touches[i], p = touch(this, touches, t.identifier);
	      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
	    }
	    t = g.that.__zoom;
	    if (g.touch1) {
	      var p0 = g.touch0[0],
	          l0 = g.touch0[1],
	          p1 = g.touch1[0],
	          l1 = g.touch1[1],
	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
	      t = scale(t, Math.sqrt(dp / dl));
	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
	    } else if (g.touch0) p = g.touch0[0], l = g.touch0[1];else return;
	    g.zoom("touch", constrain(translate(t, p, l), g.extent));
	  }

	  function touchended() {
	    var g = gesture(this, arguments),
	        touches = event.changedTouches,
	        n = touches.length,
	        i,
	        t;

	    nopropagation$1();
	    if (touchending) clearTimeout(touchending);
	    touchending = setTimeout(function () {
	      touchending = null;
	    }, touchDelay);
	    for (i = 0; i < n; ++i) {
	      t = touches[i];
	      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
	    }
	    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
	    if (!g.touch0) g.end();
	  }

	  zoom.filter = function (_) {
	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$9(!!_), zoom) : filter;
	  };

	  zoom.extent = function (_) {
	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$9([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
	  };

	  zoom.scaleExtent = function (_) {
	    return arguments.length ? (k0 = +_[0], k1 = +_[1], zoom) : [k0, k1];
	  };

	  zoom.translateExtent = function (_) {
	    return arguments.length ? (x0 = +_[0][0], x1 = +_[1][0], y0 = +_[0][1], y1 = +_[1][1], zoom) : [[x0, y0], [x1, y1]];
	  };

	  zoom.duration = function (_) {
	    return arguments.length ? (duration = +_, zoom) : duration;
	  };

	  zoom.on = function () {
	    var value = listeners.on.apply(listeners, arguments);
	    return value === listeners ? zoom : value;
	  };

	  return zoom;
	}

	function constant$10 (x) {
	  return function () {
	    return x;
	  };
	}

	function BrushEvent (target, type, selection) {
	  this.target = target;
	  this.type = type;
	  this.selection = selection;
	}

	function nopropagation$2() {
	  event.stopImmediatePropagation();
	}

	function noevent$2 () {
	  event.preventDefault();
	  event.stopImmediatePropagation();
	}

	var MODE_DRAG = { name: "drag" };
	var MODE_SPACE = { name: "space" };
	var MODE_HANDLE = { name: "handle" };
	var MODE_CENTER = { name: "center" };
	var X = {
	  name: "x",
	  handles: ["e", "w"].map(type$1),
	  input: function (x, e) {
	    return x && [[x[0], e[0][1]], [x[1], e[1][1]]];
	  },
	  output: function (xy) {
	    return xy && [xy[0][0], xy[1][0]];
	  }
	};

	var Y = {
	  name: "y",
	  handles: ["n", "s"].map(type$1),
	  input: function (y, e) {
	    return y && [[e[0][0], y[0]], [e[1][0], y[1]]];
	  },
	  output: function (xy) {
	    return xy && [xy[0][1], xy[1][1]];
	  }
	};

	var XY = {
	  name: "xy",
	  handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type$1),
	  input: function (xy) {
	    return xy;
	  },
	  output: function (xy) {
	    return xy;
	  }
	};

	var cursors = {
	  overlay: "crosshair",
	  selection: "move",
	  n: "ns-resize",
	  e: "ew-resize",
	  s: "ns-resize",
	  w: "ew-resize",
	  nw: "nwse-resize",
	  ne: "nesw-resize",
	  se: "nwse-resize",
	  sw: "nesw-resize"
	};

	var flipX = {
	  e: "w",
	  w: "e",
	  nw: "ne",
	  ne: "nw",
	  se: "sw",
	  sw: "se"
	};

	var flipY = {
	  n: "s",
	  s: "n",
	  nw: "sw",
	  ne: "se",
	  se: "ne",
	  sw: "nw"
	};

	var signsX = {
	  overlay: +1,
	  selection: +1,
	  n: null,
	  e: +1,
	  s: null,
	  w: -1,
	  nw: -1,
	  ne: +1,
	  se: +1,
	  sw: -1
	};

	var signsY = {
	  overlay: +1,
	  selection: +1,
	  n: -1,
	  e: null,
	  s: +1,
	  w: null,
	  nw: -1,
	  ne: -1,
	  se: +1,
	  sw: +1
	};

	function type$1(t) {
	  return { type: t };
	}

	// Ignore right-click, since that should open the context menu.
	function defaultFilter$2() {
	  return !event.button;
	}

	function defaultExtent$1() {
	  var svg = this.ownerSVGElement || this;
	  return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];
	}

	// Like d3.local, but with the name “__brush” rather than auto-generated.
	function local$1(node) {
	  while (!node.__brush) if (!(node = node.parentNode)) return;
	  return node.__brush;
	}

	function empty$1(extent) {
	  return extent[0][0] === extent[1][0] || extent[0][1] === extent[1][1];
	}

	function brushSelection(node) {
	  var state = node.__brush;
	  return state ? state.dim.output(state.selection) : null;
	}

	function brushX() {
	  return brush$1(X);
	}

	function brushY() {
	  return brush$1(Y);
	}

	function brush () {
	  return brush$1(XY);
	}

	function brush$1(dim) {
	  var extent = defaultExtent$1,
	      filter = defaultFilter$2,
	      listeners = dispatch(brush, "start", "brush", "end"),
	      handleSize = 6,
	      touchending;

	  function brush(group) {
	    var overlay = group.property("__brush", initialize).selectAll(".overlay").data([type$1("overlay")]);

	    overlay.enter().append("rect").attr("class", "overlay").attr("pointer-events", "all").attr("cursor", cursors.overlay).merge(overlay).each(function () {
	      var extent = local$1(this).extent;
	      select(this).attr("x", extent[0][0]).attr("y", extent[0][1]).attr("width", extent[1][0] - extent[0][0]).attr("height", extent[1][1] - extent[0][1]);
	    });

	    group.selectAll(".selection").data([type$1("selection")]).enter().append("rect").attr("class", "selection").attr("cursor", cursors.selection).attr("fill", "#777").attr("fill-opacity", 0.3).attr("stroke", "#fff").attr("shape-rendering", "crispEdges");

	    var handle = group.selectAll(".handle").data(dim.handles, function (d) {
	      return d.type;
	    });

	    handle.exit().remove();

	    handle.enter().append("rect").attr("class", function (d) {
	      return "handle handle--" + d.type;
	    }).attr("cursor", function (d) {
	      return cursors[d.type];
	    });

	    group.each(redraw).attr("fill", "none").attr("pointer-events", "all").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)").on("mousedown.brush touchstart.brush", started);
	  }

	  brush.move = function (group, selection) {
	    if (group.selection) {
	      group.on("start.brush", function () {
	        emitter(this, arguments).beforestart().start();
	      }).on("interrupt.brush end.brush", function () {
	        emitter(this, arguments).end();
	      }).tween("brush", function () {
	        var that = this,
	            state = that.__brush,
	            emit = emitter(that, arguments),
	            selection0 = state.selection,
	            selection1 = dim.input(typeof selection === "function" ? selection.apply(this, arguments) : selection, state.extent),
	            i = interpolate(selection0, selection1);

	        function tween(t) {
	          state.selection = t === 1 && empty$1(selection1) ? null : i(t);
	          redraw.call(that);
	          emit.brush();
	        }

	        return selection0 && selection1 ? tween : tween(1);
	      });
	    } else {
	      group.each(function () {
	        var that = this,
	            args = arguments,
	            state = that.__brush,
	            selection1 = dim.input(typeof selection === "function" ? selection.apply(that, args) : selection, state.extent),
	            emit = emitter(that, args).beforestart();

	        interrupt(that);
	        state.selection = selection1 == null || empty$1(selection1) ? null : selection1;
	        redraw.call(that);
	        emit.start().brush().end();
	      });
	    }
	  };

	  function redraw() {
	    var group = select(this),
	        selection = local$1(this).selection;

	    if (selection) {
	      group.selectAll(".selection").style("display", null).attr("x", selection[0][0]).attr("y", selection[0][1]).attr("width", selection[1][0] - selection[0][0]).attr("height", selection[1][1] - selection[0][1]);

	      group.selectAll(".handle").style("display", null).attr("x", function (d) {
	        return d.type[d.type.length - 1] === "e" ? selection[1][0] - handleSize / 2 : selection[0][0] - handleSize / 2;
	      }).attr("y", function (d) {
	        return d.type[0] === "s" ? selection[1][1] - handleSize / 2 : selection[0][1] - handleSize / 2;
	      }).attr("width", function (d) {
	        return d.type === "n" || d.type === "s" ? selection[1][0] - selection[0][0] + handleSize : handleSize;
	      }).attr("height", function (d) {
	        return d.type === "e" || d.type === "w" ? selection[1][1] - selection[0][1] + handleSize : handleSize;
	      });
	    } else {
	      group.selectAll(".selection,.handle").style("display", "none").attr("x", null).attr("y", null).attr("width", null).attr("height", null);
	    }
	  }

	  function emitter(that, args) {
	    return that.__brush.emitter || new Emitter(that, args);
	  }

	  function Emitter(that, args) {
	    this.that = that;
	    this.args = args;
	    this.state = that.__brush;
	    this.active = 0;
	  }

	  Emitter.prototype = {
	    beforestart: function () {
	      if (++this.active === 1) this.state.emitter = this, this.starting = true;
	      return this;
	    },
	    start: function () {
	      if (this.starting) this.starting = false, this.emit("start");
	      return this;
	    },
	    brush: function () {
	      this.emit("brush");
	      return this;
	    },
	    end: function () {
	      if (--this.active === 0) delete this.state.emitter, this.emit("end");
	      return this;
	    },
	    emit: function (type) {
	      customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]);
	    }
	  };

	  function started() {
	    if (event.touches) {
	      if (event.changedTouches.length < event.touches.length) return noevent$2();
	    } else if (touchending) return;
	    if (!filter.apply(this, arguments)) return;

	    var that = this,
	        type = event.target.__data__.type,
	        mode = (event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : event.altKey ? MODE_CENTER : MODE_HANDLE,
	        signX = dim === Y ? null : signsX[type],
	        signY = dim === X ? null : signsY[type],
	        state = local$1(that),
	        extent = state.extent,
	        selection = state.selection,
	        W = extent[0][0],
	        w0,
	        w1,
	        N = extent[0][1],
	        n0,
	        n1,
	        E = extent[1][0],
	        e0,
	        e1,
	        S = extent[1][1],
	        s0,
	        s1,
	        dx,
	        dy,
	        moving,
	        shifting = signX && signY && event.shiftKey,
	        lockX,
	        lockY,
	        point0 = mouse(that),
	        point = point0,
	        emit = emitter(that, arguments).beforestart();

	    if (type === "overlay") {
	      state.selection = selection = [[w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]], [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]];
	    } else {
	      w0 = selection[0][0];
	      n0 = selection[0][1];
	      e0 = selection[1][0];
	      s0 = selection[1][1];
	    }

	    w1 = w0;
	    n1 = n0;
	    e1 = e0;
	    s1 = s0;

	    var group = select(that).attr("pointer-events", "none");

	    var overlay = group.selectAll(".overlay").attr("cursor", cursors[type]);

	    if (event.touches) {
	      group.on("touchmove.brush", moved, true).on("touchend.brush touchcancel.brush", ended, true);
	    } else {
	      var view = select(event.view).on("keydown.brush", keydowned, true).on("keyup.brush", keyupped, true).on("mousemove.brush", moved, true).on("mouseup.brush", ended, true);

	      dragDisable(event.view);
	    }

	    nopropagation$2();
	    interrupt(that);
	    redraw.call(that);
	    emit.start();

	    function moved() {
	      var point1 = mouse(that);
	      if (shifting && !lockX && !lockY) {
	        if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;else lockX = true;
	      }
	      point = point1;
	      moving = true;
	      noevent$2();
	      move();
	    }

	    function move() {
	      var t;

	      dx = point[0] - point0[0];
	      dy = point[1] - point0[1];

	      switch (mode) {
	        case MODE_SPACE:
	        case MODE_DRAG:
	          {
	            if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx;
	            if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy;
	            break;
	          }
	        case MODE_HANDLE:
	          {
	            if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0;else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx;
	            if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0;else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy;
	            break;
	          }
	        case MODE_CENTER:
	          {
	            if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX));
	            if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY));
	            break;
	          }
	      }

	      if (e1 < w1) {
	        signX *= -1;
	        t = w0, w0 = e0, e0 = t;
	        t = w1, w1 = e1, e1 = t;
	        if (type in flipX) overlay.attr("cursor", cursors[type = flipX[type]]);
	      }

	      if (s1 < n1) {
	        signY *= -1;
	        t = n0, n0 = s0, s0 = t;
	        t = n1, n1 = s1, s1 = t;
	        if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
	      }

	      if (state.selection) selection = state.selection; // May be set by brush.move!
	      if (lockX) w1 = selection[0][0], e1 = selection[1][0];
	      if (lockY) n1 = selection[0][1], s1 = selection[1][1];

	      if (selection[0][0] !== w1 || selection[0][1] !== n1 || selection[1][0] !== e1 || selection[1][1] !== s1) {
	        state.selection = [[w1, n1], [e1, s1]];
	        redraw.call(that);
	        emit.brush();
	      }
	    }

	    function ended() {
	      nopropagation$2();
	      if (event.touches) {
	        if (event.touches.length) return;
	        if (touchending) clearTimeout(touchending);
	        touchending = setTimeout(function () {
	          touchending = null;
	        }, 500); // Ghost clicks are delayed!
	        group.on("touchmove.brush touchend.brush touchcancel.brush", null);
	      } else {
	        dragEnable(event.view, moving);
	        view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null);
	      }
	      group.attr("pointer-events", "all");
	      overlay.attr("cursor", cursors.overlay);
	      if (state.selection) selection = state.selection; // May be set by brush.move (on start)!
	      if (empty$1(selection)) state.selection = null, redraw.call(that);
	      emit.end();
	    }

	    function keydowned() {
	      switch (event.keyCode) {
	        case 16:
	          {
	            // SHIFT
	            shifting = signX && signY;
	            break;
	          }
	        case 18:
	          {
	            // ALT
	            if (mode === MODE_HANDLE) {
	              if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
	              if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
	              mode = MODE_CENTER;
	              move();
	            }
	            break;
	          }
	        case 32:
	          {
	            // SPACE; takes priority over ALT
	            if (mode === MODE_HANDLE || mode === MODE_CENTER) {
	              if (signX < 0) e0 = e1 - dx;else if (signX > 0) w0 = w1 - dx;
	              if (signY < 0) s0 = s1 - dy;else if (signY > 0) n0 = n1 - dy;
	              mode = MODE_SPACE;
	              overlay.attr("cursor", cursors.selection);
	              move();
	            }
	            break;
	          }
	        default:
	          return;
	      }
	      noevent$2();
	    }

	    function keyupped() {
	      switch (event.keyCode) {
	        case 16:
	          {
	            // SHIFT
	            if (shifting) {
	              lockX = lockY = shifting = false;
	              move();
	            }
	            break;
	          }
	        case 18:
	          {
	            // ALT
	            if (mode === MODE_CENTER) {
	              if (signX < 0) e0 = e1;else if (signX > 0) w0 = w1;
	              if (signY < 0) s0 = s1;else if (signY > 0) n0 = n1;
	              mode = MODE_HANDLE;
	              move();
	            }
	            break;
	          }
	        case 32:
	          {
	            // SPACE
	            if (mode === MODE_SPACE) {
	              if (event.altKey) {
	                if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
	                if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
	                mode = MODE_CENTER;
	              } else {
	                if (signX < 0) e0 = e1;else if (signX > 0) w0 = w1;
	                if (signY < 0) s0 = s1;else if (signY > 0) n0 = n1;
	                mode = MODE_HANDLE;
	              }
	              overlay.attr("cursor", cursors[type]);
	              move();
	            }
	            break;
	          }
	        default:
	          return;
	      }
	      noevent$2();
	    }
	  }

	  function initialize() {
	    var state = this.__brush || { selection: null };
	    state.extent = extent.apply(this, arguments);
	    state.dim = dim;
	    return state;
	  }

	  brush.extent = function (_) {
	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$10([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent;
	  };

	  brush.filter = function (_) {
	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$10(!!_), brush) : filter;
	  };

	  brush.handleSize = function (_) {
	    return arguments.length ? (handleSize = +_, brush) : handleSize;
	  };

	  brush.on = function () {
	    var value = listeners.on.apply(listeners, arguments);
	    return value === listeners ? brush : value;
	  };

	  return brush;
	}

	var cos = Math.cos;
	var sin = Math.sin;
	var pi$3 = Math.PI;
	var halfPi$2 = pi$3 / 2;
	var tau$3 = pi$3 * 2;
	var max$1 = Math.max;

	function compareValue(compare) {
	  return function (a, b) {
	    return compare(a.source.value + a.target.value, b.source.value + b.target.value);
	  };
	}

	function chord () {
	  var padAngle = 0,
	      sortGroups = null,
	      sortSubgroups = null,
	      sortChords = null;

	  function chord(matrix) {
	    var n = matrix.length,
	        groupSums = [],
	        groupIndex = range(n),
	        subgroupIndex = [],
	        chords = [],
	        groups = chords.groups = new Array(n),
	        subgroups = new Array(n * n),
	        k,
	        x,
	        x0,
	        dx,
	        i,
	        j;

	    // Compute the sum.
	    k = 0, i = -1;while (++i < n) {
	      x = 0, j = -1;while (++j < n) {
	        x += matrix[i][j];
	      }
	      groupSums.push(x);
	      subgroupIndex.push(range(n));
	      k += x;
	    }

	    // Sort groups…
	    if (sortGroups) groupIndex.sort(function (a, b) {
	      return sortGroups(groupSums[a], groupSums[b]);
	    });

	    // Sort subgroups…
	    if (sortSubgroups) subgroupIndex.forEach(function (d, i) {
	      d.sort(function (a, b) {
	        return sortSubgroups(matrix[i][a], matrix[i][b]);
	      });
	    });

	    // Convert the sum to scaling factor for [0, 2pi].
	    // TODO Allow start and end angle to be specified?
	    // TODO Allow padding to be specified as percentage?
	    k = max$1(0, tau$3 - padAngle * n) / k;
	    dx = k ? padAngle : tau$3 / n;

	    // Compute the start and end angle for each group and subgroup.
	    // Note: Opera has a bug reordering object literal properties!
	    x = 0, i = -1;while (++i < n) {
	      x0 = x, j = -1;while (++j < n) {
	        var di = groupIndex[i],
	            dj = subgroupIndex[di][j],
	            v = matrix[di][dj],
	            a0 = x,
	            a1 = x += v * k;
	        subgroups[dj * n + di] = {
	          index: di,
	          subindex: dj,
	          startAngle: a0,
	          endAngle: a1,
	          value: v
	        };
	      }
	      groups[di] = {
	        index: di,
	        startAngle: x0,
	        endAngle: x,
	        value: groupSums[di]
	      };
	      x += dx;
	    }

	    // Generate chords for each (non-empty) subgroup-subgroup link.
	    i = -1;while (++i < n) {
	      j = i - 1;while (++j < n) {
	        var source = subgroups[j * n + i],
	            target = subgroups[i * n + j];
	        if (source.value || target.value) {
	          chords.push(source.value < target.value ? { source: target, target: source } : { source: source, target: target });
	        }
	      }
	    }

	    return sortChords ? chords.sort(sortChords) : chords;
	  }

	  chord.padAngle = function (_) {
	    return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;
	  };

	  chord.sortGroups = function (_) {
	    return arguments.length ? (sortGroups = _, chord) : sortGroups;
	  };

	  chord.sortSubgroups = function (_) {
	    return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;
	  };

	  chord.sortChords = function (_) {
	    return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;
	  };

	  return chord;
	}

	var slice$5 = Array.prototype.slice;

	function constant$11 (x) {
	  return function () {
	    return x;
	  };
	}

	function defaultSource(d) {
	  return d.source;
	}

	function defaultTarget(d) {
	  return d.target;
	}

	function defaultRadius$1(d) {
	  return d.radius;
	}

	function defaultStartAngle(d) {
	  return d.startAngle;
	}

	function defaultEndAngle(d) {
	  return d.endAngle;
	}

	function ribbon () {
	  var source = defaultSource,
	      target = defaultTarget,
	      radius = defaultRadius$1,
	      startAngle = defaultStartAngle,
	      endAngle = defaultEndAngle,
	      context = null;

	  function ribbon() {
	    var buffer,
	        argv = slice$5.call(arguments),
	        s = source.apply(this, argv),
	        t = target.apply(this, argv),
	        sr = +radius.apply(this, (argv[0] = s, argv)),
	        sa0 = startAngle.apply(this, argv) - halfPi$2,
	        sa1 = endAngle.apply(this, argv) - halfPi$2,
	        sx0 = sr * cos(sa0),
	        sy0 = sr * sin(sa0),
	        tr = +radius.apply(this, (argv[0] = t, argv)),
	        ta0 = startAngle.apply(this, argv) - halfPi$2,
	        ta1 = endAngle.apply(this, argv) - halfPi$2;

	    if (!context) context = buffer = path();

	    context.moveTo(sx0, sy0);
	    context.arc(0, 0, sr, sa0, sa1);
	    if (sa0 !== ta0 || sa1 !== ta1) {
	      // TODO sr !== tr?
	      context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0));
	      context.arc(0, 0, tr, ta0, ta1);
	    }
	    context.quadraticCurveTo(0, 0, sx0, sy0);
	    context.closePath();

	    if (buffer) return context = null, buffer + "" || null;
	  }

	  ribbon.radius = function (_) {
	    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$11(+_), ribbon) : radius;
	  };

	  ribbon.startAngle = function (_) {
	    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$11(+_), ribbon) : startAngle;
	  };

	  ribbon.endAngle = function (_) {
	    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$11(+_), ribbon) : endAngle;
	  };

	  ribbon.source = function (_) {
	    return arguments.length ? (source = _, ribbon) : source;
	  };

	  ribbon.target = function (_) {
	    return arguments.length ? (target = _, ribbon) : target;
	  };

	  ribbon.context = function (_) {
	    return arguments.length ? (context = _ == null ? null : _, ribbon) : context;
	  };

	  return ribbon;
	}

	// Adds floating point numbers with twice the normal precision.
	// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
	// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
	// 305–363 (1997).
	// Code adapted from GeographicLib by Charles F. F. Karney,
	// http://geographiclib.sourceforge.net/

	function adder () {
	  return new Adder();
	}

	function Adder() {
	  this.reset();
	}

	Adder.prototype = {
	  constructor: Adder,
	  reset: function () {
	    this.s = // rounded value
	    this.t = 0; // exact error
	  },
	  add: function (y) {
	    add$1(temp, y, this.t);
	    add$1(this, temp.s, this.s);
	    if (this.s) this.t += temp.t;else this.s = temp.t;
	  },
	  valueOf: function () {
	    return this.s;
	  }
	};

	var temp = new Adder();

	function add$1(adder, a, b) {
	  var x = adder.s = a + b,
	      bv = x - a,
	      av = x - bv;
	  adder.t = a - av + (b - bv);
	}

	var epsilon$4 = 1e-6;
	var epsilon2$2 = 1e-12;
	var pi$4 = Math.PI;
	var halfPi$3 = pi$4 / 2;
	var quarterPi = pi$4 / 4;
	var tau$4 = pi$4 * 2;

	var degrees$1 = 180 / pi$4;
	var radians = pi$4 / 180;

	var abs = Math.abs;
	var atan = Math.atan;
	var atan2 = Math.atan2;
	var cos$1 = Math.cos;
	var ceil = Math.ceil;
	var exp = Math.exp;
	var log$1 = Math.log;
	var pow$1 = Math.pow;
	var sin$1 = Math.sin;
	var sign$1 = Math.sign || function (x) {
	  return x > 0 ? 1 : x < 0 ? -1 : 0;
	};
	var sqrt$1 = Math.sqrt;
	var tan = Math.tan;

	function acos(x) {
	  return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x);
	}

	function asin$1(x) {
	  return x > 1 ? halfPi$3 : x < -1 ? -halfPi$3 : Math.asin(x);
	}

	function haversin(x) {
	  return (x = sin$1(x / 2)) * x;
	}

	function noop$2() {}

	function streamGeometry(geometry, stream) {
	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
	    streamGeometryType[geometry.type](geometry, stream);
	  }
	}

	var streamObjectType = {
	  Feature: function (feature, stream) {
	    streamGeometry(feature.geometry, stream);
	  },
	  FeatureCollection: function (object, stream) {
	    var features = object.features,
	        i = -1,
	        n = features.length;
	    while (++i < n) streamGeometry(features[i].geometry, stream);
	  }
	};

	var streamGeometryType = {
	  Sphere: function (object, stream) {
	    stream.sphere();
	  },
	  Point: function (object, stream) {
	    object = object.coordinates;
	    stream.point(object[0], object[1], object[2]);
	  },
	  MultiPoint: function (object, stream) {
	    var coordinates = object.coordinates,
	        i = -1,
	        n = coordinates.length;
	    while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
	  },
	  LineString: function (object, stream) {
	    streamLine(object.coordinates, stream, 0);
	  },
	  MultiLineString: function (object, stream) {
	    var coordinates = object.coordinates,
	        i = -1,
	        n = coordinates.length;
	    while (++i < n) streamLine(coordinates[i], stream, 0);
	  },
	  Polygon: function (object, stream) {
	    streamPolygon(object.coordinates, stream);
	  },
	  MultiPolygon: function (object, stream) {
	    var coordinates = object.coordinates,
	        i = -1,
	        n = coordinates.length;
	    while (++i < n) streamPolygon(coordinates[i], stream);
	  },
	  GeometryCollection: function (object, stream) {
	    var geometries = object.geometries,
	        i = -1,
	        n = geometries.length;
	    while (++i < n) streamGeometry(geometries[i], stream);
	  }
	};

	function streamLine(coordinates, stream, closed) {
	  var i = -1,
	      n = coordinates.length - closed,
	      coordinate;
	  stream.lineStart();
	  while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
	  stream.lineEnd();
	}

	function streamPolygon(coordinates, stream) {
	  var i = -1,
	      n = coordinates.length;
	  stream.polygonStart();
	  while (++i < n) streamLine(coordinates[i], stream, 1);
	  stream.polygonEnd();
	}

	function geoStream (object, stream) {
	  if (object && streamObjectType.hasOwnProperty(object.type)) {
	    streamObjectType[object.type](object, stream);
	  } else {
	    streamGeometry(object, stream);
	  }
	}

	var areaRingSum = adder();

	var areaSum = adder();
	var lambda00;
	var phi00;
	var lambda0;
	var cosPhi0;
	var sinPhi0;
	var areaStream = {
	  point: noop$2,
	  lineStart: noop$2,
	  lineEnd: noop$2,
	  polygonStart: function () {
	    areaRingSum.reset();
	    areaStream.lineStart = areaRingStart;
	    areaStream.lineEnd = areaRingEnd;
	  },
	  polygonEnd: function () {
	    var areaRing = +areaRingSum;
	    areaSum.add(areaRing < 0 ? tau$4 + areaRing : areaRing);
	    this.lineStart = this.lineEnd = this.point = noop$2;
	  },
	  sphere: function () {
	    areaSum.add(tau$4);
	  }
	};

	function areaRingStart() {
	  areaStream.point = areaPointFirst;
	}

	function areaRingEnd() {
	  areaPoint(lambda00, phi00);
	}

	function areaPointFirst(lambda, phi) {
	  areaStream.point = areaPoint;
	  lambda00 = lambda, phi00 = phi;
	  lambda *= radians, phi *= radians;
	  lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi);
	}

	function areaPoint(lambda, phi) {
	  lambda *= radians, phi *= radians;
	  phi = phi / 2 + quarterPi; // half the angular distance from south pole

	  // Spherical excess E for a spherical triangle with vertices: south pole,
	  // previous point, current point.  Uses a formula derived from Cagnoli’s
	  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
	  var dLambda = lambda - lambda0,
	      sdLambda = dLambda >= 0 ? 1 : -1,
	      adLambda = sdLambda * dLambda,
	      cosPhi = cos$1(phi),
	      sinPhi = sin$1(phi),
	      k = sinPhi0 * sinPhi,
	      u = cosPhi0 * cosPhi + k * cos$1(adLambda),
	      v = k * sdLambda * sin$1(adLambda);
	  areaRingSum.add(atan2(v, u));

	  // Advance the previous points.
	  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
	}

	function geoArea (object) {
	  areaSum.reset();
	  geoStream(object, areaStream);
	  return areaSum * 2;
	}

	function spherical(cartesian) {
	  return [atan2(cartesian[1], cartesian[0]), asin$1(cartesian[2])];
	}

	function cartesian(spherical) {
	  var lambda = spherical[0],
	      phi = spherical[1],
	      cosPhi = cos$1(phi);
	  return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];
	}

	function cartesianDot(a, b) {
	  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
	}

	function cartesianCross(a, b) {
	  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
	}

	// TODO return a
	function cartesianAddInPlace(a, b) {
	  a[0] += b[0], a[1] += b[1], a[2] += b[2];
	}

	function cartesianScale(vector, k) {
	  return [vector[0] * k, vector[1] * k, vector[2] * k];
	}

	// TODO return d
	function cartesianNormalizeInPlace(d) {
	  var l = sqrt$1(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
	  d[0] /= l, d[1] /= l, d[2] /= l;
	}

var 	lambda0$1;
	var phi0;
	var lambda1;
	var phi1;
	var lambda2;
var 	lambda00$1;
var 	phi00$1;
	var p0;
	var deltaSum = adder();
	var ranges;
var 	range$1;
	var boundsStream = {
	  point: boundsPoint,
	  lineStart: boundsLineStart,
	  lineEnd: boundsLineEnd,
	  polygonStart: function () {
	    boundsStream.point = boundsRingPoint;
	    boundsStream.lineStart = boundsRingStart;
	    boundsStream.lineEnd = boundsRingEnd;
	    deltaSum.reset();
	    areaStream.polygonStart();
	  },
	  polygonEnd: function () {
	    areaStream.polygonEnd();
	    boundsStream.point = boundsPoint;
	    boundsStream.lineStart = boundsLineStart;
	    boundsStream.lineEnd = boundsLineEnd;
	    if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);else if (deltaSum > epsilon$4) phi1 = 90;else if (deltaSum < -epsilon$4) phi0 = -90;
	    range$1[0] = lambda0$1, range$1[1] = lambda1;
	  }
	};

	function boundsPoint(lambda, phi) {
	  ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
	  if (phi < phi0) phi0 = phi;
	  if (phi > phi1) phi1 = phi;
	}

	function linePoint(lambda, phi) {
	  var p = cartesian([lambda * radians, phi * radians]);
	  if (p0) {
	    var normal = cartesianCross(p0, p),
	        equatorial = [normal[1], -normal[0], 0],
	        inflection = cartesianCross(equatorial, normal);
	    cartesianNormalizeInPlace(inflection);
	    inflection = spherical(inflection);
	    var delta = lambda - lambda2,
	        sign = delta > 0 ? 1 : -1,
	        lambdai = inflection[0] * degrees$1 * sign,
	        phii,
	        antimeridian = abs(delta) > 180;
	    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
	      phii = inflection[1] * degrees$1;
	      if (phii > phi1) phi1 = phii;
	    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
	      phii = -inflection[1] * degrees$1;
	      if (phii < phi0) phi0 = phii;
	    } else {
	      if (phi < phi0) phi0 = phi;
	      if (phi > phi1) phi1 = phi;
	    }
	    if (antimeridian) {
	      if (lambda < lambda2) {
	        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
	      } else {
	        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
	      }
	    } else {
	      if (lambda1 >= lambda0$1) {
	        if (lambda < lambda0$1) lambda0$1 = lambda;
	        if (lambda > lambda1) lambda1 = lambda;
	      } else {
	        if (lambda > lambda2) {
	          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
	        } else {
	          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
	        }
	      }
	    }
	  } else {
	    boundsPoint(lambda, phi);
	  }
	  p0 = p, lambda2 = lambda;
	}

	function boundsLineStart() {
	  boundsStream.point = linePoint;
	}

	function boundsLineEnd() {
	  range$1[0] = lambda0$1, range$1[1] = lambda1;
	  boundsStream.point = boundsPoint;
	  p0 = null;
	}

	function boundsRingPoint(lambda, phi) {
	  if (p0) {
	    var delta = lambda - lambda2;
	    deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
	  } else {
	    lambda00$1 = lambda, phi00$1 = phi;
	  }
	  areaStream.point(lambda, phi);
	  linePoint(lambda, phi);
	}

	function boundsRingStart() {
	  areaStream.lineStart();
	}

	function boundsRingEnd() {
	  boundsRingPoint(lambda00$1, phi00$1);
	  areaStream.lineEnd();
	  if (abs(deltaSum) > epsilon$4) lambda0$1 = -(lambda1 = 180);
	  range$1[0] = lambda0$1, range$1[1] = lambda1;
	  p0 = null;
	}

	// Finds the left-right distance between two longitudes.
	// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
	// the distance between ±180° to be 360°.
	function angle(lambda0, lambda1) {
	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
	}

	function rangeCompare(a, b) {
	  return a[0] - b[0];
	}

	function rangeContains(range, x) {
	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
	}

	function geoBounds (feature) {
	  var i, n, a, b, merged, deltaMax, delta;

	  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
	  ranges = [];
	  geoStream(feature, boundsStream);

	  // First, sort ranges by their minimum longitudes.
	  if (n = ranges.length) {
	    ranges.sort(rangeCompare);

	    // Then, merge any ranges that overlap.
	    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
	      b = ranges[i];
	      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
	        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
	        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
	      } else {
	        merged.push(a = b);
	      }
	    }

	    // Finally, find the largest gap between the merged ranges.
	    // The final bounding box will be the inverse of this gap.
	    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
	      b = merged[i];
	      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
	    }
	  }

	  ranges = range$1 = null;

	  return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
	}

	var W0;
	var W1;
	var X0;
	var Y0;
	var Z0;
	var X1;
	var Y1;
	var Z1;
	var X2;
	var Y2;
	var Z2;
var 	lambda00$2;
var 	phi00$2;
	var x0;
	var y0;
	var z0;
	// previous point

	var centroidStream = {
	  sphere: noop$2,
	  point: centroidPoint,
	  lineStart: centroidLineStart,
	  lineEnd: centroidLineEnd,
	  polygonStart: function () {
	    centroidStream.lineStart = centroidRingStart;
	    centroidStream.lineEnd = centroidRingEnd;
	  },
	  polygonEnd: function () {
	    centroidStream.lineStart = centroidLineStart;
	    centroidStream.lineEnd = centroidLineEnd;
	  }
	};

	// Arithmetic mean of Cartesian vectors.
	function centroidPoint(lambda, phi) {
	  lambda *= radians, phi *= radians;
	  var cosPhi = cos$1(phi);
	  centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));
	}

	function centroidPointCartesian(x, y, z) {
	  ++W0;
	  X0 += (x - X0) / W0;
	  Y0 += (y - Y0) / W0;
	  Z0 += (z - Z0) / W0;
	}

	function centroidLineStart() {
	  centroidStream.point = centroidLinePointFirst;
	}

	function centroidLinePointFirst(lambda, phi) {
	  lambda *= radians, phi *= radians;
	  var cosPhi = cos$1(phi);
	  x0 = cosPhi * cos$1(lambda);
	  y0 = cosPhi * sin$1(lambda);
	  z0 = sin$1(phi);
	  centroidStream.point = centroidLinePoint;
	  centroidPointCartesian(x0, y0, z0);
	}

	function centroidLinePoint(lambda, phi) {
	  lambda *= radians, phi *= radians;
	  var cosPhi = cos$1(phi),
	      x = cosPhi * cos$1(lambda),
	      y = cosPhi * sin$1(lambda),
	      z = sin$1(phi),
	      w = atan2(sqrt$1((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
	  W1 += w;
	  X1 += w * (x0 + (x0 = x));
	  Y1 += w * (y0 + (y0 = y));
	  Z1 += w * (z0 + (z0 = z));
	  centroidPointCartesian(x0, y0, z0);
	}

	function centroidLineEnd() {
	  centroidStream.point = centroidPoint;
	}

	// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
	// J. Applied Mechanics 42, 239 (1975).
	function centroidRingStart() {
	  centroidStream.point = centroidRingPointFirst;
	}

	function centroidRingEnd() {
	  centroidRingPoint(lambda00$2, phi00$2);
	  centroidStream.point = centroidPoint;
	}

	function centroidRingPointFirst(lambda, phi) {
	  lambda00$2 = lambda, phi00$2 = phi;
	  lambda *= radians, phi *= radians;
	  centroidStream.point = centroidRingPoint;
	  var cosPhi = cos$1(phi);
	  x0 = cosPhi * cos$1(lambda);
	  y0 = cosPhi * sin$1(lambda);
	  z0 = sin$1(phi);
	  centroidPointCartesian(x0, y0, z0);
	}

	function centroidRingPoint(lambda, phi) {
	  lambda *= radians, phi *= radians;
	  var cosPhi = cos$1(phi),
	      x = cosPhi * cos$1(lambda),
	      y = cosPhi * sin$1(lambda),
	      z = sin$1(phi),
	      cx = y0 * z - z0 * y,
	      cy = z0 * x - x0 * z,
	      cz = x0 * y - y0 * x,
	      m = sqrt$1(cx * cx + cy * cy + cz * cz),
	      u = x0 * x + y0 * y + z0 * z,
	      v = m && -acos(u) / m,
	      // area weight
	  w = atan2(m, u); // line weight
	  X2 += v * cx;
	  Y2 += v * cy;
	  Z2 += v * cz;
	  W1 += w;
	  X1 += w * (x0 + (x0 = x));
	  Y1 += w * (y0 + (y0 = y));
	  Z1 += w * (z0 + (z0 = z));
	  centroidPointCartesian(x0, y0, z0);
	}

	function geoCentroid (object) {
	  W0 = W1 = X0 = Y0 = Z0 = X1 = Y1 = Z1 = X2 = Y2 = Z2 = 0;
	  geoStream(object, centroidStream);

	  var x = X2,
	      y = Y2,
	      z = Z2,
	      m = x * x + y * y + z * z;

	  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
	  if (m < epsilon2$2) {
	    x = X1, y = Y1, z = Z1;
	    // If the feature has zero length, fall back to arithmetic mean of point vectors.
	    if (W1 < epsilon$4) x = X0, y = Y0, z = Z0;
	    m = x * x + y * y + z * z;
	    // If the feature still has an undefined ccentroid, then return.
	    if (m < epsilon2$2) return [NaN, NaN];
	  }

	  return [atan2(y, x) * degrees$1, asin$1(z / sqrt$1(m)) * degrees$1];
	}

	function constant$12 (x) {
	  return function () {
	    return x;
	  };
	}

	function compose (a, b) {

	  function compose(x, y) {
	    return x = a(x, y), b(x[0], x[1]);
	  }

	  if (a.invert && b.invert) compose.invert = function (x, y) {
	    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
	  };

	  return compose;
	}

	function rotationIdentity(lambda, phi) {
	  return [lambda > pi$4 ? lambda - tau$4 : lambda < -pi$4 ? lambda + tau$4 : lambda, phi];
	}

	rotationIdentity.invert = rotationIdentity;

	function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
	  return (deltaLambda %= tau$4) ? deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) : rotationLambda(deltaLambda) : deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) : rotationIdentity;
	}

	function forwardRotationLambda(deltaLambda) {
	  return function (lambda, phi) {
	    return lambda += deltaLambda, [lambda > pi$4 ? lambda - tau$4 : lambda < -pi$4 ? lambda + tau$4 : lambda, phi];
	  };
	}

	function rotationLambda(deltaLambda) {
	  var rotation = forwardRotationLambda(deltaLambda);
	  rotation.invert = forwardRotationLambda(-deltaLambda);
	  return rotation;
	}

	function rotationPhiGamma(deltaPhi, deltaGamma) {
	  var cosDeltaPhi = cos$1(deltaPhi),
	      sinDeltaPhi = sin$1(deltaPhi),
	      cosDeltaGamma = cos$1(deltaGamma),
	      sinDeltaGamma = sin$1(deltaGamma);

	  function rotation(lambda, phi) {
	    var cosPhi = cos$1(phi),
	        x = cos$1(lambda) * cosPhi,
	        y = sin$1(lambda) * cosPhi,
	        z = sin$1(phi),
	        k = z * cosDeltaPhi + x * sinDeltaPhi;
	    return [atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi), asin$1(k * cosDeltaGamma + y * sinDeltaGamma)];
	  }

	  rotation.invert = function (lambda, phi) {
	    var cosPhi = cos$1(phi),
	        x = cos$1(lambda) * cosPhi,
	        y = sin$1(lambda) * cosPhi,
	        z = sin$1(phi),
	        k = z * cosDeltaGamma - y * sinDeltaGamma;
	    return [atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi), asin$1(k * cosDeltaPhi - x * sinDeltaPhi)];
	  };

	  return rotation;
	}

	function geoRotation (rotate) {
	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);

	  function forward(coordinates) {
	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
	    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
	  }

	  forward.invert = function (coordinates) {
	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
	    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
	  };

	  return forward;
	}

	// Generates a circle centered at [0°, 0°], with a given radius and precision.
	function circleStream(stream, radius, delta, direction, t0, t1) {
	  if (!delta) return;
	  var cosRadius = cos$1(radius),
	      sinRadius = sin$1(radius),
	      step = direction * delta;
	  if (t0 == null) {
	    t0 = radius + direction * tau$4;
	    t1 = radius - step / 2;
	  } else {
	    t0 = circleRadius(cosRadius, t0);
	    t1 = circleRadius(cosRadius, t1);
	    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$4;
	  }
	  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
	    point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);
	    stream.point(point[0], point[1]);
	  }
	}

	// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
	function circleRadius(cosRadius, point) {
	  point = cartesian(point), point[0] -= cosRadius;
	  cartesianNormalizeInPlace(point);
	  var radius = acos(-point[1]);
	  return ((-point[2] < 0 ? -radius : radius) + tau$4 - epsilon$4) % tau$4;
	}

	function geoCircle () {
	  var center = constant$12([0, 0]),
	      radius = constant$12(90),
	      precision = constant$12(6),
	      ring,
	      rotate,
	      stream = { point: point };

	  function point(x, y) {
	    ring.push(x = rotate(x, y));
	    x[0] *= degrees$1, x[1] *= degrees$1;
	  }

	  function circle() {
	    var c = center.apply(this, arguments),
	        r = radius.apply(this, arguments) * radians,
	        p = precision.apply(this, arguments) * radians;
	    ring = [];
	    rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
	    circleStream(stream, r, p, 1);
	    c = { type: "Polygon", coordinates: [ring] };
	    ring = rotate = null;
	    return c;
	  }

	  circle.center = function (_) {
	    return arguments.length ? (center = typeof _ === "function" ? _ : constant$12([+_[0], +_[1]]), circle) : center;
	  };

	  circle.radius = function (_) {
	    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$12(+_), circle) : radius;
	  };

	  circle.precision = function (_) {
	    return arguments.length ? (precision = typeof _ === "function" ? _ : constant$12(+_), circle) : precision;
	  };

	  return circle;
	}

	function clipBuffer () {
	  var lines = [],
	      line;
	  return {
	    point: function (x, y) {
	      line.push([x, y]);
	    },
	    lineStart: function () {
	      lines.push(line = []);
	    },
	    lineEnd: noop$2,
	    rejoin: function () {
	      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
	    },
	    result: function () {
	      var result = lines;
	      lines = [];
	      line = null;
	      return result;
	    }
	  };
	}

	function clipLine (a, b, x0, y0, x1, y1) {
	  var ax = a[0],
	      ay = a[1],
	      bx = b[0],
	      by = b[1],
	      t0 = 0,
	      t1 = 1,
	      dx = bx - ax,
	      dy = by - ay,
	      r;

	  r = x0 - ax;
	  if (!dx && r > 0) return;
	  r /= dx;
	  if (dx < 0) {
	    if (r < t0) return;
	    if (r < t1) t1 = r;
	  } else if (dx > 0) {
	    if (r > t1) return;
	    if (r > t0) t0 = r;
	  }

	  r = x1 - ax;
	  if (!dx && r < 0) return;
	  r /= dx;
	  if (dx < 0) {
	    if (r > t1) return;
	    if (r > t0) t0 = r;
	  } else if (dx > 0) {
	    if (r < t0) return;
	    if (r < t1) t1 = r;
	  }

	  r = y0 - ay;
	  if (!dy && r > 0) return;
	  r /= dy;
	  if (dy < 0) {
	    if (r < t0) return;
	    if (r < t1) t1 = r;
	  } else if (dy > 0) {
	    if (r > t1) return;
	    if (r > t0) t0 = r;
	  }

	  r = y1 - ay;
	  if (!dy && r < 0) return;
	  r /= dy;
	  if (dy < 0) {
	    if (r > t1) return;
	    if (r > t0) t0 = r;
	  } else if (dy > 0) {
	    if (r < t0) return;
	    if (r < t1) t1 = r;
	  }

	  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
	  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
	  return true;
	}

	function pointEqual (a, b) {
	  return abs(a[0] - b[0]) < epsilon$4 && abs(a[1] - b[1]) < epsilon$4;
	}

	function Intersection(point, points, other, entry) {
	  this.x = point;
	  this.z = points;
	  this.o = other; // another intersection
	  this.e = entry; // is an entry?
	  this.v = false; // visited
	  this.n = this.p = null; // next & previous
	}

	// A generalized polygon clipping algorithm: given a polygon that has been cut
	// into its visible line segments, and rejoins the segments by interpolating
	// along the clip edge.
	function clipPolygon (segments, compareIntersection, startInside, interpolate, stream) {
	  var subject = [],
	      clip = [],
	      i,
	      n;

	  segments.forEach(function (segment) {
	    if ((n = segment.length - 1) <= 0) return;
	    var n,
	        p0 = segment[0],
	        p1 = segment[n],
	        x;

	    // If the first and last points of a segment are coincident, then treat as a
	    // closed ring. TODO if all rings are closed, then the winding order of the
	    // exterior ring should be checked.
	    if (pointEqual(p0, p1)) {
	      stream.lineStart();
	      for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
	      stream.lineEnd();
	      return;
	    }

	    subject.push(x = new Intersection(p0, segment, null, true));
	    clip.push(x.o = new Intersection(p0, null, x, false));
	    subject.push(x = new Intersection(p1, segment, null, false));
	    clip.push(x.o = new Intersection(p1, null, x, true));
	  });

	  if (!subject.length) return;

	  clip.sort(compareIntersection);
	  link(subject);
	  link(clip);

	  for (i = 0, n = clip.length; i < n; ++i) {
	    clip[i].e = startInside = !startInside;
	  }

	  var start = subject[0],
	      points,
	      point;

	  while (1) {
	    // Find first unvisited intersection.
	    var current = start,
	        isSubject = true;
	    while (current.v) if ((current = current.n) === start) return;
	    points = current.z;
	    stream.lineStart();
	    do {
	      current.v = current.o.v = true;
	      if (current.e) {
	        if (isSubject) {
	          for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
	        } else {
	          interpolate(current.x, current.n.x, 1, stream);
	        }
	        current = current.n;
	      } else {
	        if (isSubject) {
	          points = current.p.z;
	          for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
	        } else {
	          interpolate(current.x, current.p.x, -1, stream);
	        }
	        current = current.p;
	      }
	      current = current.o;
	      points = current.z;
	      isSubject = !isSubject;
	    } while (!current.v);
	    stream.lineEnd();
	  }
	}

	function link(array) {
	  if (!(n = array.length)) return;
	  var n,
	      i = 0,
	      a = array[0],
	      b;
	  while (++i < n) {
	    a.n = b = array[i];
	    b.p = a;
	    a = b;
	  }
	  a.n = b = array[0];
	  b.p = a;
	}

	var clipMax = 1e9;
	var clipMin = -clipMax;
	// TODO Use d3-polygon’s polygonContains here for the ring check?
	// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?

	function clipExtent(x0, y0, x1, y1) {

	  function visible(x, y) {
	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
	  }

	  function interpolate(from, to, direction, stream) {
	    var a = 0,
	        a1 = 0;
	    if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoint(from, to) < 0 ^ direction > 0) {
	      do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0); while ((a = (a + direction + 4) % 4) !== a1);
	    } else {
	      stream.point(to[0], to[1]);
	    }
	  }

	  function corner(p, direction) {
	    return abs(p[0] - x0) < epsilon$4 ? direction > 0 ? 0 : 3 : abs(p[0] - x1) < epsilon$4 ? direction > 0 ? 2 : 1 : abs(p[1] - y0) < epsilon$4 ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
	  }

	  function compareIntersection(a, b) {
	    return comparePoint(a.x, b.x);
	  }

	  function comparePoint(a, b) {
	    var ca = corner(a, 1),
	        cb = corner(b, 1);
	    return ca !== cb ? ca - cb : ca === 0 ? b[1] - a[1] : ca === 1 ? a[0] - b[0] : ca === 2 ? a[1] - b[1] : b[0] - a[0];
	  }

	  return function (stream) {
	    var activeStream = stream,
	        bufferStream = clipBuffer(),
	        segments,
	        polygon,
	        ring,
	        x__,
	        y__,
	        v__,
	        // first point
	    x_,
	        y_,
	        v_,
	        // previous point
	    first,
	        clean;

	    var clipStream = {
	      point: point,
	      lineStart: lineStart,
	      lineEnd: lineEnd,
	      polygonStart: polygonStart,
	      polygonEnd: polygonEnd
	    };

	    function point(x, y) {
	      if (visible(x, y)) activeStream.point(x, y);
	    }

	    function polygonInside() {
	      var winding = 0;

	      for (var i = 0, n = polygon.length; i < n; ++i) {
	        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
	          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
	          if (a1 <= y1) {
	            if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding;
	          } else {
	            if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding;
	          }
	        }
	      }

	      return winding;
	    }

	    // Buffer geometry within a polygon and then clip it en masse.
	    function polygonStart() {
	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
	    }

	    function polygonEnd() {
	      var startInside = polygonInside(),
	          cleanInside = clean && startInside,
	          visible = (segments = merge(segments)).length;
	      if (cleanInside || visible) {
	        stream.polygonStart();
	        if (cleanInside) {
	          stream.lineStart();
	          interpolate(null, null, 1, stream);
	          stream.lineEnd();
	        }
	        if (visible) {
	          clipPolygon(segments, compareIntersection, startInside, interpolate, stream);
	        }
	        stream.polygonEnd();
	      }
	      activeStream = stream, segments = polygon = ring = null;
	    }

	    function lineStart() {
	      clipStream.point = linePoint;
	      if (polygon) polygon.push(ring = []);
	      first = true;
	      v_ = false;
	      x_ = y_ = NaN;
	    }

	    // TODO rather than special-case polygons, simply handle them separately.
	    // Ideally, coincident intersection points should be jittered to avoid
	    // clipping issues.
	    function lineEnd() {
	      if (segments) {
	        linePoint(x__, y__);
	        if (v__ && v_) bufferStream.rejoin();
	        segments.push(bufferStream.result());
	      }
	      clipStream.point = point;
	      if (v_) activeStream.lineEnd();
	    }

	    function linePoint(x, y) {
	      var v = visible(x, y);
	      if (polygon) ring.push([x, y]);
	      if (first) {
	        x__ = x, y__ = y, v__ = v;
	        first = false;
	        if (v) {
	          activeStream.lineStart();
	          activeStream.point(x, y);
	        }
	      } else {
	        if (v && v_) activeStream.point(x, y);else {
	          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
	              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
	          if (clipLine(a, b, x0, y0, x1, y1)) {
	            if (!v_) {
	              activeStream.lineStart();
	              activeStream.point(a[0], a[1]);
	            }
	            activeStream.point(b[0], b[1]);
	            if (!v) activeStream.lineEnd();
	            clean = false;
	          } else if (v) {
	            activeStream.lineStart();
	            activeStream.point(x, y);
	            clean = false;
	          }
	        }
	      }
	      x_ = x, y_ = y, v_ = v;
	    }

	    return clipStream;
	  };
	}

	function geoClipExtent () {
	  var x0 = 0,
	      y0 = 0,
	      x1 = 960,
	      y1 = 500,
	      cache,
	      cacheStream,
	      clip;

	  return clip = {
	    stream: function (stream) {
	      return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream);
	    },
	    extent: function (_) {
	      return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];
	    }
	  };
	}

	var lengthSum = adder();
var 	lambda0$2;
var 	sinPhi0$1;
var 	cosPhi0$1;
	var lengthStream = {
	  sphere: noop$2,
	  point: noop$2,
	  lineStart: lengthLineStart,
	  lineEnd: noop$2,
	  polygonStart: noop$2,
	  polygonEnd: noop$2
	};

	function lengthLineStart() {
	  lengthStream.point = lengthPointFirst;
	  lengthStream.lineEnd = lengthLineEnd;
	}

	function lengthLineEnd() {
	  lengthStream.point = lengthStream.lineEnd = noop$2;
	}

	function lengthPointFirst(lambda, phi) {
	  lambda *= radians, phi *= radians;
	  lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi);
	  lengthStream.point = lengthPoint;
	}

	function lengthPoint(lambda, phi) {
	  lambda *= radians, phi *= radians;
	  var sinPhi = sin$1(phi),
	      cosPhi = cos$1(phi),
	      delta = abs(lambda - lambda0$2),
	      cosDelta = cos$1(delta),
	      sinDelta = sin$1(delta),
	      x = cosPhi * sinDelta,
	      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
	      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
	  lengthSum.add(atan2(sqrt$1(x * x + y * y), z));
	  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
	}

	function length$1 (object) {
	  lengthSum.reset();
	  geoStream(object, lengthStream);
	  return +lengthSum;
	}

	var coordinates = [null, null];
var 	object$1 = { type: "LineString", coordinates: coordinates };
	function geoDistance (a, b) {
	  coordinates[0] = a;
	  coordinates[1] = b;
	  return length$1(object$1);
	}

	function graticuleX(y0, y1, dy) {
	  var y = range(y0, y1 - epsilon$4, dy).concat(y1);
	  return function (x) {
	    return y.map(function (y) {
	      return [x, y];
	    });
	  };
	}

	function graticuleY(x0, x1, dx) {
	  var x = range(x0, x1 - epsilon$4, dx).concat(x1);
	  return function (y) {
	    return x.map(function (x) {
	      return [x, y];
	    });
	  };
	}

	function geoGraticule () {
	  var x1,
	      x0,
	      X1,
	      X0,
	      y1,
	      y0,
	      Y1,
	      Y0,
	      dx = 10,
	      dy = dx,
	      DX = 90,
	      DY = 360,
	      x,
	      y,
	      X,
	      Y,
	      precision = 2.5;

	  function graticule() {
	    return { type: "MultiLineString", coordinates: lines() };
	  }

	  function lines() {
	    return range(ceil(X0 / DX) * DX, X1, DX).map(X).concat(range(ceil(Y0 / DY) * DY, Y1, DY).map(Y)).concat(range(ceil(x0 / dx) * dx, x1, dx).filter(function (x) {
	      return abs(x % DX) > epsilon$4;
	    }).map(x)).concat(range(ceil(y0 / dy) * dy, y1, dy).filter(function (y) {
	      return abs(y % DY) > epsilon$4;
	    }).map(y));
	  }

	  graticule.lines = function () {
	    return lines().map(function (coordinates) {
	      return { type: "LineString", coordinates: coordinates };
	    });
	  };

	  graticule.outline = function () {
	    return {
	      type: "Polygon",
	      coordinates: [X(X0).concat(Y(Y1).slice(1), X(X1).reverse().slice(1), Y(Y0).reverse().slice(1))]
	    };
	  };

	  graticule.extent = function (_) {
	    if (!arguments.length) return graticule.extentMinor();
	    return graticule.extentMajor(_).extentMinor(_);
	  };

	  graticule.extentMajor = function (_) {
	    if (!arguments.length) return [[X0, Y0], [X1, Y1]];
	    X0 = +_[0][0], X1 = +_[1][0];
	    Y0 = +_[0][1], Y1 = +_[1][1];
	    if (X0 > X1) _ = X0, X0 = X1, X1 = _;
	    if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
	    return graticule.precision(precision);
	  };

	  graticule.extentMinor = function (_) {
	    if (!arguments.length) return [[x0, y0], [x1, y1]];
	    x0 = +_[0][0], x1 = +_[1][0];
	    y0 = +_[0][1], y1 = +_[1][1];
	    if (x0 > x1) _ = x0, x0 = x1, x1 = _;
	    if (y0 > y1) _ = y0, y0 = y1, y1 = _;
	    return graticule.precision(precision);
	  };

	  graticule.step = function (_) {
	    if (!arguments.length) return graticule.stepMinor();
	    return graticule.stepMajor(_).stepMinor(_);
	  };

	  graticule.stepMajor = function (_) {
	    if (!arguments.length) return [DX, DY];
	    DX = +_[0], DY = +_[1];
	    return graticule;
	  };

	  graticule.stepMinor = function (_) {
	    if (!arguments.length) return [dx, dy];
	    dx = +_[0], dy = +_[1];
	    return graticule;
	  };

	  graticule.precision = function (_) {
	    if (!arguments.length) return precision;
	    precision = +_;
	    x = graticuleX(y0, y1, 90);
	    y = graticuleY(x0, x1, precision);
	    X = graticuleX(Y0, Y1, 90);
	    Y = graticuleY(X0, X1, precision);
	    return graticule;
	  };

	  return graticule.extentMajor([[-180, -90 + epsilon$4], [180, 90 - epsilon$4]]).extentMinor([[-180, -80 - epsilon$4], [180, 80 + epsilon$4]]);
	}

	function geoInterpolate (a, b) {
	  var x0 = a[0] * radians,
	      y0 = a[1] * radians,
	      x1 = b[0] * radians,
	      y1 = b[1] * radians,
	      cy0 = cos$1(y0),
	      sy0 = sin$1(y0),
	      cy1 = cos$1(y1),
	      sy1 = sin$1(y1),
	      kx0 = cy0 * cos$1(x0),
	      ky0 = cy0 * sin$1(x0),
	      kx1 = cy1 * cos$1(x1),
	      ky1 = cy1 * sin$1(x1),
	      d = 2 * asin$1(sqrt$1(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),
	      k = sin$1(d);

	  var interpolate = d ? function (t) {
	    var B = sin$1(t *= d) / k,
	        A = sin$1(d - t) / k,
	        x = A * kx0 + B * kx1,
	        y = A * ky0 + B * ky1,
	        z = A * sy0 + B * sy1;
	    return [atan2(y, x) * degrees$1, atan2(z, sqrt$1(x * x + y * y)) * degrees$1];
	  } : function () {
	    return [x0 * degrees$1, y0 * degrees$1];
	  };

	  interpolate.distance = d;

	  return interpolate;
	}

	function identity$7 (x) {
	  return x;
	}

var 	areaSum$1 = adder();
var 	areaRingSum$1 = adder();
	var x00;
	var y00;
var 	x0$1;
var 	y0$1;
	var areaStream$1 = {
	  point: noop$2,
	  lineStart: noop$2,
	  lineEnd: noop$2,
	  polygonStart: function () {
	    areaStream$1.lineStart = areaRingStart$1;
	    areaStream$1.lineEnd = areaRingEnd$1;
	  },
	  polygonEnd: function () {
	    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;
	    areaSum$1.add(abs(areaRingSum$1));
	    areaRingSum$1.reset();
	  },
	  result: function () {
	    var area = areaSum$1 / 2;
	    areaSum$1.reset();
	    return area;
	  }
	};

	function areaRingStart$1() {
	  areaStream$1.point = areaPointFirst$1;
	}

	function areaPointFirst$1(x, y) {
	  areaStream$1.point = areaPoint$1;
	  x00 = x0$1 = x, y00 = y0$1 = y;
	}

	function areaPoint$1(x, y) {
	  areaRingSum$1.add(y0$1 * x - x0$1 * y);
	  x0$1 = x, y0$1 = y;
	}

	function areaRingEnd$1() {
	  areaPoint$1(x00, y00);
	}

var 	x0$2 = Infinity;
var 	y0$2 = x0$2;
	var x1 = -x0$2;
	var y1 = x1;
	var boundsStream$1 = {
	  point: boundsPoint$1,
	  lineStart: noop$2,
	  lineEnd: noop$2,
	  polygonStart: noop$2,
	  polygonEnd: noop$2,
	  result: function () {
	    var bounds = [[x0$2, y0$2], [x1, y1]];
	    x1 = y1 = -(y0$2 = x0$2 = Infinity);
	    return bounds;
	  }
	};

	function boundsPoint$1(x, y) {
	  if (x < x0$2) x0$2 = x;
	  if (x > x1) x1 = x;
	  if (y < y0$2) y0$2 = y;
	  if (y > y1) y1 = y;
	}

var 	X0$1 = 0;
var 	Y0$1 = 0;
var 	Z0$1 = 0;
var 	X1$1 = 0;
var 	Y1$1 = 0;
var 	Z1$1 = 0;
var 	X2$1 = 0;
var 	Y2$1 = 0;
var 	Z2$1 = 0;
var 	x00$1;
var 	y00$1;
var 	x0$3;
var 	y0$3;
	var centroidStream$1 = {
	  point: centroidPoint$1,
	  lineStart: centroidLineStart$1,
	  lineEnd: centroidLineEnd$1,
	  polygonStart: function () {
	    centroidStream$1.lineStart = centroidRingStart$1;
	    centroidStream$1.lineEnd = centroidRingEnd$1;
	  },
	  polygonEnd: function () {
	    centroidStream$1.point = centroidPoint$1;
	    centroidStream$1.lineStart = centroidLineStart$1;
	    centroidStream$1.lineEnd = centroidLineEnd$1;
	  },
	  result: function () {
	    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1] : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1] : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1] : [NaN, NaN];
	    X0$1 = Y0$1 = Z0$1 = X1$1 = Y1$1 = Z1$1 = X2$1 = Y2$1 = Z2$1 = 0;
	    return centroid;
	  }
	};

	function centroidPoint$1(x, y) {
	  X0$1 += x;
	  Y0$1 += y;
	  ++Z0$1;
	}

	function centroidLineStart$1() {
	  centroidStream$1.point = centroidPointFirstLine;
	}

	function centroidPointFirstLine(x, y) {
	  centroidStream$1.point = centroidPointLine;
	  centroidPoint$1(x0$3 = x, y0$3 = y);
	}

	function centroidPointLine(x, y) {
	  var dx = x - x0$3,
	      dy = y - y0$3,
	      z = sqrt$1(dx * dx + dy * dy);
	  X1$1 += z * (x0$3 + x) / 2;
	  Y1$1 += z * (y0$3 + y) / 2;
	  Z1$1 += z;
	  centroidPoint$1(x0$3 = x, y0$3 = y);
	}

	function centroidLineEnd$1() {
	  centroidStream$1.point = centroidPoint$1;
	}

	function centroidRingStart$1() {
	  centroidStream$1.point = centroidPointFirstRing;
	}

	function centroidRingEnd$1() {
	  centroidPointRing(x00$1, y00$1);
	}

	function centroidPointFirstRing(x, y) {
	  centroidStream$1.point = centroidPointRing;
	  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
	}

	function centroidPointRing(x, y) {
	  var dx = x - x0$3,
	      dy = y - y0$3,
	      z = sqrt$1(dx * dx + dy * dy);

	  X1$1 += z * (x0$3 + x) / 2;
	  Y1$1 += z * (y0$3 + y) / 2;
	  Z1$1 += z;

	  z = y0$3 * x - x0$3 * y;
	  X2$1 += z * (x0$3 + x);
	  Y2$1 += z * (y0$3 + y);
	  Z2$1 += z * 3;
	  centroidPoint$1(x0$3 = x, y0$3 = y);
	}

	function PathContext(context) {
	  this._context = context;
	}

	PathContext.prototype = {
	  _radius: 4.5,
	  pointRadius: function (_) {
	    return this._radius = _, this;
	  },
	  polygonStart: function () {
	    this._line = 0;
	  },
	  polygonEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._point = 0;
	  },
	  lineEnd: function () {
	    if (this._line === 0) this._context.closePath();
	    this._point = NaN;
	  },
	  point: function (x, y) {
	    switch (this._point) {
	      case 0:
	        {
	          this._context.moveTo(x, y);
	          this._point = 1;
	          break;
	        }
	      case 1:
	        {
	          this._context.lineTo(x, y);
	          break;
	        }
	      default:
	        {
	          this._context.moveTo(x + this._radius, y);
	          this._context.arc(x, y, this._radius, 0, tau$4);
	          break;
	        }
	    }
	  },
	  result: noop$2
	};

	function PathString() {
	  this._string = [];
	}

	PathString.prototype = {
	  _circle: circle$1(4.5),
	  pointRadius: function (_) {
	    return this._circle = circle$1(_), this;
	  },
	  polygonStart: function () {
	    this._line = 0;
	  },
	  polygonEnd: function () {
	    this._line = NaN;
	  },
	  lineStart: function () {
	    this._point = 0;
	  },
	  lineEnd: function () {
	    if (this._line === 0) this._string.push("Z");
	    this._point = NaN;
	  },
	  point: function (x, y) {
	    switch (this._point) {
	      case 0:
	        {
	          this._string.push("M", x, ",", y);
	          this._point = 1;
	          break;
	        }
	      case 1:
	        {
	          this._string.push("L", x, ",", y);
	          break;
	        }
	      default:
	        {
	          this._string.push("M", x, ",", y, this._circle);
	          break;
	        }
	    }
	  },
	  result: function () {
	    if (this._string.length) {
	      var result = this._string.join("");
	      this._string = [];
	      return result;
	    }
	  }
	};

	function circle$1(radius) {
	  return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";
	}

	function geoPath () {
	  var pointRadius = 4.5,
	      projection,
	      projectionStream,
	      context,
	      contextStream;

	  function path(object) {
	    if (object) {
	      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
	      geoStream(object, projectionStream(contextStream));
	    }
	    return contextStream.result();
	  }

	  path.area = function (object) {
	    geoStream(object, projectionStream(areaStream$1));
	    return areaStream$1.result();
	  };

	  path.bounds = function (object) {
	    geoStream(object, projectionStream(boundsStream$1));
	    return boundsStream$1.result();
	  };

	  path.centroid = function (object) {
	    geoStream(object, projectionStream(centroidStream$1));
	    return centroidStream$1.result();
	  };

	  path.projection = function (_) {
	    return arguments.length ? (projectionStream = (projection = _) == null ? identity$7 : _.stream, path) : projection;
	  };

	  path.context = function (_) {
	    if (!arguments.length) return context;
	    contextStream = (context = _) == null ? new PathString() : new PathContext(_);
	    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
	    return path;
	  };

	  path.pointRadius = function (_) {
	    if (!arguments.length) return pointRadius;
	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
	    return path;
	  };

	  return path.projection(null).context(null);
	}

	var sum$2 = adder();

	function polygonContains$1 (polygon, point) {
	  var lambda = point[0],
	      phi = point[1],
	      normal = [sin$1(lambda), -cos$1(lambda), 0],
	      angle = 0,
	      winding = 0;

	  sum$2.reset();

	  for (var i = 0, n = polygon.length; i < n; ++i) {
	    if (!(m = (ring = polygon[i]).length)) continue;
	    var ring,
	        m,
	        point0 = ring[m - 1],
	        lambda0 = point0[0],
	        phi0 = point0[1] / 2 + quarterPi,
	        sinPhi0 = sin$1(phi0),
	        cosPhi0 = cos$1(phi0);

	    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
	      var point1 = ring[j],
	          lambda1 = point1[0],
	          phi1 = point1[1] / 2 + quarterPi,
	          sinPhi1 = sin$1(phi1),
	          cosPhi1 = cos$1(phi1),
	          delta = lambda1 - lambda0,
	          sign = delta >= 0 ? 1 : -1,
	          absDelta = sign * delta,
	          antimeridian = absDelta > pi$4,
	          k = sinPhi0 * sinPhi1;

	      sum$2.add(atan2(k * sign * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
	      angle += antimeridian ? delta + sign * tau$4 : delta;

	      // Are the longitudes either side of the point’s meridian (lambda),
	      // and are the latitudes smaller than the parallel (phi)?
	      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
	        var arc = cartesianCross(cartesian(point0), cartesian(point1));
	        cartesianNormalizeInPlace(arc);
	        var intersection = cartesianCross(normal, arc);
	        cartesianNormalizeInPlace(intersection);
	        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin$1(intersection[2]);
	        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
	          winding += antimeridian ^ delta >= 0 ? 1 : -1;
	        }
	      }
	    }
	  }

	  // First, determine whether the South pole is inside or outside:
	  //
	  // It is inside if:
	  // * the polygon winds around it in a clockwise direction.
	  // * the polygon does not (cumulatively) wind around it, but has a negative
	  //   (counter-clockwise) area.
	  //
	  // Second, count the (signed) number of times a segment crosses a lambda
	  // from the point to the South pole.  If it is zero, then the point is the
	  // same side as the South pole.

	  return (angle < -epsilon$4 || angle < epsilon$4 && sum$2 < -epsilon$4) ^ winding & 1;
	}

	function clip (pointVisible, clipLine, interpolate, start) {
	  return function (rotate, sink) {
	    var line = clipLine(sink),
	        rotatedStart = rotate.invert(start[0], start[1]),
	        ringBuffer = clipBuffer(),
	        ringSink = clipLine(ringBuffer),
	        polygonStarted = false,
	        polygon,
	        segments,
	        ring;

	    var clip = {
	      point: point,
	      lineStart: lineStart,
	      lineEnd: lineEnd,
	      polygonStart: function () {
	        clip.point = pointRing;
	        clip.lineStart = ringStart;
	        clip.lineEnd = ringEnd;
	        segments = [];
	        polygon = [];
	      },
	      polygonEnd: function () {
	        clip.point = point;
	        clip.lineStart = lineStart;
	        clip.lineEnd = lineEnd;
	        segments = merge(segments);
	        var startInside = polygonContains$1(polygon, rotatedStart);
	        if (segments.length) {
	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
	          clipPolygon(segments, compareIntersection, startInside, interpolate, sink);
	        } else if (startInside) {
	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
	          sink.lineStart();
	          interpolate(null, null, 1, sink);
	          sink.lineEnd();
	        }
	        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
	        segments = polygon = null;
	      },
	      sphere: function () {
	        sink.polygonStart();
	        sink.lineStart();
	        interpolate(null, null, 1, sink);
	        sink.lineEnd();
	        sink.polygonEnd();
	      }
	    };

	    function point(lambda, phi) {
	      var point = rotate(lambda, phi);
	      if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi);
	    }

	    function pointLine(lambda, phi) {
	      var point = rotate(lambda, phi);
	      line.point(point[0], point[1]);
	    }

	    function lineStart() {
	      clip.point = pointLine;
	      line.lineStart();
	    }

	    function lineEnd() {
	      clip.point = point;
	      line.lineEnd();
	    }

	    function pointRing(lambda, phi) {
	      ring.push([lambda, phi]);
	      var point = rotate(lambda, phi);
	      ringSink.point(point[0], point[1]);
	    }

	    function ringStart() {
	      ringSink.lineStart();
	      ring = [];
	    }

	    function ringEnd() {
	      pointRing(ring[0][0], ring[0][1]);
	      ringSink.lineEnd();

	      var clean = ringSink.clean(),
	          ringSegments = ringBuffer.result(),
	          i,
	          n = ringSegments.length,
	          m,
	          segment,
	          point;

	      ring.pop();
	      polygon.push(ring);
	      ring = null;

	      if (!n) return;

	      // No intersections.
	      if (clean & 1) {
	        segment = ringSegments[0];
	        if ((m = segment.length - 1) > 0) {
	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
	          sink.lineStart();
	          for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
	          sink.lineEnd();
	        }
	        return;
	      }

	      // Rejoin connected segments.
	      // TODO reuse ringBuffer.rejoin()?
	      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));

	      segments.push(ringSegments.filter(validSegment));
	    }

	    return clip;
	  };
	}

	function validSegment(segment) {
	  return segment.length > 1;
	}

	// Intersections are sorted along the clip edge. For both antimeridian cutting
	// and circle clipping, the same comparison is used.
	function compareIntersection(a, b) {
	  return ((a = a.x)[0] < 0 ? a[1] - halfPi$3 - epsilon$4 : halfPi$3 - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfPi$3 - epsilon$4 : halfPi$3 - b[1]);
	}

	var clipAntimeridian = clip(function () {
	  return true;
	}, clipAntimeridianLine, clipAntimeridianInterpolate, [-pi$4, -halfPi$3]);

	// Takes a line and cuts into visible segments. Return values: 0 - there were
	// intersections or the line was empty; 1 - no intersections; 2 - there were
	// intersections, and the first and last segments should be rejoined.
	function clipAntimeridianLine(stream) {
	  var lambda0 = NaN,
	      phi0 = NaN,
	      sign0 = NaN,
	      clean; // no intersections

	  return {
	    lineStart: function () {
	      stream.lineStart();
	      clean = 1;
	    },
	    point: function (lambda1, phi1) {
	      var sign1 = lambda1 > 0 ? pi$4 : -pi$4,
	          delta = abs(lambda1 - lambda0);
	      if (abs(delta - pi$4) < epsilon$4) {
	        // line crosses a pole
	        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$3 : -halfPi$3);
	        stream.point(sign0, phi0);
	        stream.lineEnd();
	        stream.lineStart();
	        stream.point(sign1, phi0);
	        stream.point(lambda1, phi0);
	        clean = 0;
	      } else if (sign0 !== sign1 && delta >= pi$4) {
	        // line crosses antimeridian
	        if (abs(lambda0 - sign0) < epsilon$4) lambda0 -= sign0 * epsilon$4; // handle degeneracies
	        if (abs(lambda1 - sign1) < epsilon$4) lambda1 -= sign1 * epsilon$4;
	        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
	        stream.point(sign0, phi0);
	        stream.lineEnd();
	        stream.lineStart();
	        stream.point(sign1, phi0);
	        clean = 0;
	      }
	      stream.point(lambda0 = lambda1, phi0 = phi1);
	      sign0 = sign1;
	    },
	    lineEnd: function () {
	      stream.lineEnd();
	      lambda0 = phi0 = NaN;
	    },
	    clean: function () {
	      return 2 - clean; // if intersections, rejoin first and last segments
	    }
	  };
	}

	function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
	  var cosPhi0,
	      cosPhi1,
	      sinLambda0Lambda1 = sin$1(lambda0 - lambda1);
	  return abs(sinLambda0Lambda1) > epsilon$4 ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1) - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;
	}

	function clipAntimeridianInterpolate(from, to, direction, stream) {
	  var phi;
	  if (from == null) {
	    phi = direction * halfPi$3;
	    stream.point(-pi$4, phi);
	    stream.point(0, phi);
	    stream.point(pi$4, phi);
	    stream.point(pi$4, 0);
	    stream.point(pi$4, -phi);
	    stream.point(0, -phi);
	    stream.point(-pi$4, -phi);
	    stream.point(-pi$4, 0);
	    stream.point(-pi$4, phi);
	  } else if (abs(from[0] - to[0]) > epsilon$4) {
	    var lambda = from[0] < to[0] ? pi$4 : -pi$4;
	    phi = direction * lambda / 2;
	    stream.point(-lambda, phi);
	    stream.point(0, phi);
	    stream.point(lambda, phi);
	  } else {
	    stream.point(to[0], to[1]);
	  }
	}

	function clipCircle (radius, delta) {
	  var cr = cos$1(radius),
	      smallRadius = cr > 0,
	      notHemisphere = abs(cr) > epsilon$4; // TODO optimise for this common case

	  function interpolate(from, to, direction, stream) {
	    circleStream(stream, radius, delta, direction, from, to);
	  }

	  function visible(lambda, phi) {
	    return cos$1(lambda) * cos$1(phi) > cr;
	  }

	  // Takes a line and cuts into visible segments. Return values used for polygon
	  // clipping: 0 - there were intersections or the line was empty; 1 - no
	  // intersections 2 - there were intersections, and the first and last segments
	  // should be rejoined.
	  function clipLine(stream) {
	    var point0, // previous point
	    c0, // code for previous point
	    v0, // visibility of previous point
	    v00, // visibility of first point
	    clean; // no intersections
	    return {
	      lineStart: function () {
	        v00 = v0 = false;
	        clean = 1;
	      },
	      point: function (lambda, phi) {
	        var point1 = [lambda, phi],
	            point2,
	            v = visible(lambda, phi),
	            c = smallRadius ? v ? 0 : code(lambda, phi) : v ? code(lambda + (lambda < 0 ? pi$4 : -pi$4), phi) : 0;
	        if (!point0 && (v00 = v0 = v)) stream.lineStart();
	        // Handle degeneracies.
	        // TODO ignore if not clipping polygons.
	        if (v !== v0) {
	          point2 = intersect(point0, point1);
	          if (pointEqual(point0, point2) || pointEqual(point1, point2)) {
	            point1[0] += epsilon$4;
	            point1[1] += epsilon$4;
	            v = visible(point1[0], point1[1]);
	          }
	        }
	        if (v !== v0) {
	          clean = 0;
	          if (v) {
	            // outside going in
	            stream.lineStart();
	            point2 = intersect(point1, point0);
	            stream.point(point2[0], point2[1]);
	          } else {
	            // inside going out
	            point2 = intersect(point0, point1);
	            stream.point(point2[0], point2[1]);
	            stream.lineEnd();
	          }
	          point0 = point2;
	        } else if (notHemisphere && point0 && smallRadius ^ v) {
	          var t;
	          // If the codes for two points are different, or are both zero,
	          // and there this segment intersects with the small circle.
	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
	            clean = 0;
	            if (smallRadius) {
	              stream.lineStart();
	              stream.point(t[0][0], t[0][1]);
	              stream.point(t[1][0], t[1][1]);
	              stream.lineEnd();
	            } else {
	              stream.point(t[1][0], t[1][1]);
	              stream.lineEnd();
	              stream.lineStart();
	              stream.point(t[0][0], t[0][1]);
	            }
	          }
	        }
	        if (v && (!point0 || !pointEqual(point0, point1))) {
	          stream.point(point1[0], point1[1]);
	        }
	        point0 = point1, v0 = v, c0 = c;
	      },
	      lineEnd: function () {
	        if (v0) stream.lineEnd();
	        point0 = null;
	      },
	      // Rejoin first and last segments if there were intersections and the first
	      // and last points were visible.
	      clean: function () {
	        return clean | (v00 && v0) << 1;
	      }
	    };
	  }

	  // Intersects the great circle between a and b with the clip circle.
	  function intersect(a, b, two) {
	    var pa = cartesian(a),
	        pb = cartesian(b);

	    // We have two planes, n1.p = d1 and n2.p = d2.
	    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
	    var n1 = [1, 0, 0],
	        // normal
	    n2 = cartesianCross(pa, pb),
	        n2n2 = cartesianDot(n2, n2),
	        n1n2 = n2[0],
	        // cartesianDot(n1, n2),
	    determinant = n2n2 - n1n2 * n1n2;

	    // Two polar points.
	    if (!determinant) return !two && a;

	    var c1 = cr * n2n2 / determinant,
	        c2 = -cr * n1n2 / determinant,
	        n1xn2 = cartesianCross(n1, n2),
	        A = cartesianScale(n1, c1),
	        B = cartesianScale(n2, c2);
	    cartesianAddInPlace(A, B);

	    // Solve |p(t)|^2 = 1.
	    var u = n1xn2,
	        w = cartesianDot(A, u),
	        uu = cartesianDot(u, u),
	        t2 = w * w - uu * (cartesianDot(A, A) - 1);

	    if (t2 < 0) return;

	    var t = sqrt$1(t2),
	        q = cartesianScale(u, (-w - t) / uu);
	    cartesianAddInPlace(q, A);
	    q = spherical(q);

	    if (!two) return q;

	    // Two intersection points.
	    var lambda0 = a[0],
	        lambda1 = b[0],
	        phi0 = a[1],
	        phi1 = b[1],
	        z;

	    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;

	    var delta = lambda1 - lambda0,
	        polar = abs(delta - pi$4) < epsilon$4,
	        meridian = polar || delta < epsilon$4;

	    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;

	    // Check that the first point is between a and b.
	    if (meridian ? polar ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$4 ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi$4 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
	      var q1 = cartesianScale(u, (-w + t) / uu);
	      cartesianAddInPlace(q1, A);
	      return [q, spherical(q1)];
	    }
	  }

	  // Generates a 4-bit vector representing the location of a point relative to
	  // the small circle's bounding box.
	  function code(lambda, phi) {
	    var r = smallRadius ? radius : pi$4 - radius,
	        code = 0;
	    if (lambda < -r) code |= 1; // left
	    else if (lambda > r) code |= 2; // right
	    if (phi < -r) code |= 4; // below
	    else if (phi > r) code |= 8; // above
	    return code;
	  }

	  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$4, radius - pi$4]);
	}

	function geoTransform (prototype) {
	  return {
	    stream: transform$1(prototype)
	  };
	}

	function transform$1(prototype) {
	  function T() {}
	  var p = T.prototype = Object.create(Transform$1.prototype);
	  for (var k in prototype) p[k] = prototype[k];
	  return function (stream) {
	    var t = new T();
	    t.stream = stream;
	    return t;
	  };
	}

	function Transform$1() {}

	Transform$1.prototype = {
	  point: function (x, y) {
	    this.stream.point(x, y);
	  },
	  sphere: function () {
	    this.stream.sphere();
	  },
	  lineStart: function () {
	    this.stream.lineStart();
	  },
	  lineEnd: function () {
	    this.stream.lineEnd();
	  },
	  polygonStart: function () {
	    this.stream.polygonStart();
	  },
	  polygonEnd: function () {
	    this.stream.polygonEnd();
	  }
	};

	function fit(project, extent, object) {
	  var w = extent[1][0] - extent[0][0],
	      h = extent[1][1] - extent[0][1],
	      clip = project.clipExtent && project.clipExtent();

	  project.scale(150).translate([0, 0]);

	  if (clip != null) project.clipExtent(null);

	  geoStream(object, project.stream(boundsStream$1));

	  var b = boundsStream$1.result(),
	      k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
	      x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
	      y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;

	  if (clip != null) project.clipExtent(clip);

	  return project.scale(k * 150).translate([x, y]);
	}

	function fitSize(project) {
	  return function (size, object) {
	    return fit(project, [[0, 0], size], object);
	  };
	}

	function fitExtent(project) {
	  return function (extent, object) {
	    return fit(project, extent, object);
	  };
	}

	var maxDepth = 16;
	var cosMinDistance = cos$1(30 * radians);
	// cos(minimum angular distance)

	function resample (project, delta2) {
	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
	}

	function resampleNone(project) {
	  return transform$1({
	    point: function (x, y) {
	      x = project(x, y);
	      this.stream.point(x[0], x[1]);
	    }
	  });
	}

	function resample$1(project, delta2) {

	  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
	    var dx = x1 - x0,
	        dy = y1 - y0,
	        d2 = dx * dx + dy * dy;
	    if (d2 > 4 * delta2 && depth--) {
	      var a = a0 + a1,
	          b = b0 + b1,
	          c = c0 + c1,
	          m = sqrt$1(a * a + b * b + c * c),
	          phi2 = asin$1(c /= m),
	          lambda2 = abs(abs(c) - 1) < epsilon$4 || abs(lambda0 - lambda1) < epsilon$4 ? (lambda0 + lambda1) / 2 : atan2(b, a),
	          p = project(lambda2, phi2),
	          x2 = p[0],
	          y2 = p[1],
	          dx2 = x2 - x0,
	          dy2 = y2 - y0,
	          dz = dy * dx2 - dx * dy2;
	      if (dz * dz / d2 > delta2 // perpendicular projected distance
	      || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
	      || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {
	        // angular distance
	        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
	        stream.point(x2, y2);
	        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
	      }
	    }
	  }
	  return function (stream) {
	    var lambda00, x00, y00, a00, b00, c00, // first point
	    lambda0, x0, y0, a0, b0, c0; // previous point

	    var resampleStream = {
	      point: point,
	      lineStart: lineStart,
	      lineEnd: lineEnd,
	      polygonStart: function () {
	        stream.polygonStart();resampleStream.lineStart = ringStart;
	      },
	      polygonEnd: function () {
	        stream.polygonEnd();resampleStream.lineStart = lineStart;
	      }
	    };

	    function point(x, y) {
	      x = project(x, y);
	      stream.point(x[0], x[1]);
	    }

	    function lineStart() {
	      x0 = NaN;
	      resampleStream.point = linePoint;
	      stream.lineStart();
	    }

	    function linePoint(lambda, phi) {
	      var c = cartesian([lambda, phi]),
	          p = project(lambda, phi);
	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
	      stream.point(x0, y0);
	    }

	    function lineEnd() {
	      resampleStream.point = point;
	      stream.lineEnd();
	    }

	    function ringStart() {
	      lineStart();
	      resampleStream.point = ringPoint;
	      resampleStream.lineEnd = ringEnd;
	    }

	    function ringPoint(lambda, phi) {
	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
	      resampleStream.point = linePoint;
	    }

	    function ringEnd() {
	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
	      resampleStream.lineEnd = lineEnd;
	      lineEnd();
	    }

	    return resampleStream;
	  };
	}

	var transformRadians = transform$1({
	  point: function (x, y) {
	    this.stream.point(x * radians, y * radians);
	  }
	});

	function projection(project) {
	  return projectionMutator(function () {
	    return project;
	  })();
	}

	function projectionMutator(projectAt) {
	  var project,
	      k = 150,
	      // scale
	  x = 480,
	      y = 250,
	      // translate
	  dx,
	      dy,
	      lambda = 0,
	      phi = 0,
	      // center
	  deltaLambda = 0,
	      deltaPhi = 0,
	      deltaGamma = 0,
	      rotate,
	      projectRotate,
	      // rotate
	  theta = null,
	      preclip = clipAntimeridian,
	      // clip angle
	  x0 = null,
	      y0,
	      x1,
	      y1,
	      postclip = identity$7,
	      // clip extent
	  delta2 = 0.5,
	      projectResample = resample(projectTransform, delta2),
	      // precision
	  cache,
	      cacheStream;

	  function projection(point) {
	    point = projectRotate(point[0] * radians, point[1] * radians);
	    return [point[0] * k + dx, dy - point[1] * k];
	  }

	  function invert(point) {
	    point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);
	    return point && [point[0] * degrees$1, point[1] * degrees$1];
	  }

	  function projectTransform(x, y) {
	    return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];
	  }

	  projection.stream = function (stream) {
	    return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream))));
	  };

	  projection.clipAngle = function (_) {
	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
	  };

	  projection.clipExtent = function (_) {
	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$7) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
	  };

	  projection.scale = function (_) {
	    return arguments.length ? (k = +_, recenter()) : k;
	  };

	  projection.translate = function (_) {
	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
	  };

	  projection.center = function (_) {
	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
	  };

	  projection.rotate = function (_) {
	    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
	  };

	  projection.precision = function (_) {
	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt$1(delta2);
	  };

	  projection.fitExtent = fitExtent(projection);

	  projection.fitSize = fitSize(projection);

	  function recenter() {
	    projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);
	    var center = project(lambda, phi);
	    dx = x - center[0] * k;
	    dy = y + center[1] * k;
	    return reset();
	  }

	  function reset() {
	    cache = cacheStream = null;
	    return projection;
	  }

	  return function () {
	    project = projectAt.apply(this, arguments);
	    projection.invert = project.invert && invert;
	    return recenter();
	  };
	}

	function conicProjection(projectAt) {
	  var phi0 = 0,
	      phi1 = pi$4 / 3,
	      m = projectionMutator(projectAt),
	      p = m(phi0, phi1);

	  p.parallels = function (_) {
	    return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1];
	  };

	  return p;
	}

	function cylindricalEqualAreaRaw(phi0) {
	  var cosPhi0 = cos$1(phi0);

	  function forward(lambda, phi) {
	    return [lambda * cosPhi0, sin$1(phi) / cosPhi0];
	  }

	  forward.invert = function (x, y) {
	    return [x / cosPhi0, asin$1(y * cosPhi0)];
	  };

	  return forward;
	}

	function conicEqualAreaRaw(y0, y1) {
	  var sy0 = sin$1(y0),
	      n = (sy0 + sin$1(y1)) / 2;

	  // Are the parallels symmetrical around the Equator?
	  if (abs(n) < epsilon$4) return cylindricalEqualAreaRaw(y0);

	  var c = 1 + sy0 * (2 * n - sy0),
	      r0 = sqrt$1(c) / n;

	  function project(x, y) {
	    var r = sqrt$1(c - 2 * n * sin$1(y)) / n;
	    return [r * sin$1(x *= n), r0 - r * cos$1(x)];
	  }

	  project.invert = function (x, y) {
	    var r0y = r0 - y;
	    return [atan2(x, abs(r0y)) / n * sign$1(r0y), asin$1((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
	  };

	  return project;
	}

	function conicEqualArea () {
	  return conicProjection(conicEqualAreaRaw).scale(155.424).center([0, 33.6442]);
	}

	function albers () {
	    return conicEqualArea().parallels([29.5, 45.5]).scale(1070).translate([480, 250]).rotate([96, 0]).center([-0.6, 38.7]);
	}

	// The projections must have mutually exclusive clip regions on the sphere,
	// as this will avoid emitting interleaving lines and polygons.
	function multiplex(streams) {
	  var n = streams.length;
	  return {
	    point: function (x, y) {
	      var i = -1;while (++i < n) streams[i].point(x, y);
	    },
	    sphere: function () {
	      var i = -1;while (++i < n) streams[i].sphere();
	    },
	    lineStart: function () {
	      var i = -1;while (++i < n) streams[i].lineStart();
	    },
	    lineEnd: function () {
	      var i = -1;while (++i < n) streams[i].lineEnd();
	    },
	    polygonStart: function () {
	      var i = -1;while (++i < n) streams[i].polygonStart();
	    },
	    polygonEnd: function () {
	      var i = -1;while (++i < n) streams[i].polygonEnd();
	    }
	  };
	}

	// A composite projection for the United States, configured by default for
	// 960×500. The projection also works quite well at 960×600 if you change the
	// scale to 1285 and adjust the translate accordingly. The set of standard
	// parallels for each region comes from USGS, which is published here:
	// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
	function geoAlbersUsa () {
	  var cache,
	      cacheStream,
	      lower48 = albers(),
	      lower48Point,
	      alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]),
	      alaskaPoint,
	      // EPSG:3338
	  hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]),
	      hawaiiPoint,
	      // ESRI:102007
	  point,
	      pointStream = { point: function (x, y) {
	      point = [x, y];
	    } };

	  function albersUsa(coordinates) {
	    var x = coordinates[0],
	        y = coordinates[1];
	    return point = null, (lower48Point.point(x, y), point) || (alaskaPoint.point(x, y), point) || (hawaiiPoint.point(x, y), point);
	  }

	  albersUsa.invert = function (coordinates) {
	    var k = lower48.scale(),
	        t = lower48.translate(),
	        x = (coordinates[0] - t[0]) / k,
	        y = (coordinates[1] - t[1]) / k;
	    return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii : lower48).invert(coordinates);
	  };

	  albersUsa.stream = function (stream) {
	    return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
	  };

	  albersUsa.precision = function (_) {
	    if (!arguments.length) return lower48.precision();
	    lower48.precision(_), alaska.precision(_), hawaii.precision(_);
	    return reset();
	  };

	  albersUsa.scale = function (_) {
	    if (!arguments.length) return lower48.scale();
	    lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
	    return albersUsa.translate(lower48.translate());
	  };

	  albersUsa.translate = function (_) {
	    if (!arguments.length) return lower48.translate();
	    var k = lower48.scale(),
	        x = +_[0],
	        y = +_[1];

	    lower48Point = lower48.translate(_).clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]]).stream(pointStream);

	    alaskaPoint = alaska.translate([x - 0.307 * k, y + 0.201 * k]).clipExtent([[x - 0.425 * k + epsilon$4, y + 0.120 * k + epsilon$4], [x - 0.214 * k - epsilon$4, y + 0.234 * k - epsilon$4]]).stream(pointStream);

	    hawaiiPoint = hawaii.translate([x - 0.205 * k, y + 0.212 * k]).clipExtent([[x - 0.214 * k + epsilon$4, y + 0.166 * k + epsilon$4], [x - 0.115 * k - epsilon$4, y + 0.234 * k - epsilon$4]]).stream(pointStream);

	    return reset();
	  };

	  albersUsa.fitExtent = fitExtent(albersUsa);

	  albersUsa.fitSize = fitSize(albersUsa);

	  function reset() {
	    cache = cacheStream = null;
	    return albersUsa;
	  }

	  return albersUsa.scale(1070);
	}

	function azimuthalRaw(scale) {
	  return function (x, y) {
	    var cx = cos$1(x),
	        cy = cos$1(y),
	        k = scale(cx * cy);
	    return [k * cy * sin$1(x), k * sin$1(y)];
	  };
	}

	function azimuthalInvert(angle) {
	  return function (x, y) {
	    var z = sqrt$1(x * x + y * y),
	        c = angle(z),
	        sc = sin$1(c),
	        cc = cos$1(c);
	    return [atan2(x * sc, z * cc), asin$1(z && y * sc / z)];
	  };
	}

	var azimuthalEqualAreaRaw = azimuthalRaw(function (cxcy) {
	  return sqrt$1(2 / (1 + cxcy));
	});

	azimuthalEqualAreaRaw.invert = azimuthalInvert(function (z) {
	  return 2 * asin$1(z / 2);
	});

	function geoAzimuthalEqualArea () {
	  return projection(azimuthalEqualAreaRaw).scale(124.75).clipAngle(180 - 1e-3);
	}

	var azimuthalEquidistantRaw = azimuthalRaw(function (c) {
	  return (c = acos(c)) && c / sin$1(c);
	});

	azimuthalEquidistantRaw.invert = azimuthalInvert(function (z) {
	  return z;
	});

	function geoAzimuthalEquidistant () {
	  return projection(azimuthalEquidistantRaw).scale(79.4188).clipAngle(180 - 1e-3);
	}

	function mercatorRaw(lambda, phi) {
	  return [lambda, log$1(tan((halfPi$3 + phi) / 2))];
	}

	mercatorRaw.invert = function (x, y) {
	  return [x, 2 * atan(exp(y)) - halfPi$3];
	};

	function geoMercator () {
	  return mercatorProjection(mercatorRaw).scale(961 / tau$4);
	}

	function mercatorProjection(project) {
	  var m = projection(project),
	      scale = m.scale,
	      translate = m.translate,
	      clipExtent = m.clipExtent,
	      clipAuto;

	  m.scale = function (_) {
	    return arguments.length ? (scale(_), clipAuto && m.clipExtent(null), m) : scale();
	  };

	  m.translate = function (_) {
	    return arguments.length ? (translate(_), clipAuto && m.clipExtent(null), m) : translate();
	  };

	  m.clipExtent = function (_) {
	    if (!arguments.length) return clipAuto ? null : clipExtent();
	    if (clipAuto = _ == null) {
	      var k = pi$4 * scale(),
	          t = translate();
	      _ = [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]];
	    }
	    clipExtent(_);
	    return m;
	  };

	  return m.clipExtent(null);
	}

	function tany(y) {
	  return tan((halfPi$3 + y) / 2);
	}

	function conicConformalRaw(y0, y1) {
	  var cy0 = cos$1(y0),
	      n = y0 === y1 ? sin$1(y0) : log$1(cy0 / cos$1(y1)) / log$1(tany(y1) / tany(y0)),
	      f = cy0 * pow$1(tany(y0), n) / n;

	  if (!n) return mercatorRaw;

	  function project(x, y) {
	    if (f > 0) {
	      if (y < -halfPi$3 + epsilon$4) y = -halfPi$3 + epsilon$4;
	    } else {
	      if (y > halfPi$3 - epsilon$4) y = halfPi$3 - epsilon$4;
	    }
	    var r = f / pow$1(tany(y), n);
	    return [r * sin$1(n * x), f - r * cos$1(n * x)];
	  }

	  project.invert = function (x, y) {
	    var fy = f - y,
	        r = sign$1(n) * sqrt$1(x * x + fy * fy);
	    return [atan2(x, abs(fy)) / n * sign$1(fy), 2 * atan(pow$1(f / r, 1 / n)) - halfPi$3];
	  };

	  return project;
	}

	function geoConicConformal () {
	  return conicProjection(conicConformalRaw).scale(109.5).parallels([30, 30]);
	}

	function equirectangularRaw(lambda, phi) {
	  return [lambda, phi];
	}

	equirectangularRaw.invert = equirectangularRaw;

	function geoEquirectangular () {
	  return projection(equirectangularRaw).scale(152.63);
	}

	function conicEquidistantRaw(y0, y1) {
	  var cy0 = cos$1(y0),
	      n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),
	      g = cy0 / n + y0;

	  if (abs(n) < epsilon$4) return equirectangularRaw;

	  function project(x, y) {
	    var gy = g - y,
	        nx = n * x;
	    return [gy * sin$1(nx), g - gy * cos$1(nx)];
	  }

	  project.invert = function (x, y) {
	    var gy = g - y;
	    return [atan2(x, abs(gy)) / n * sign$1(gy), g - sign$1(n) * sqrt$1(x * x + gy * gy)];
	  };

	  return project;
	}

	function geoConicEquidistant () {
	  return conicProjection(conicEquidistantRaw).scale(131.154).center([0, 13.9389]);
	}

	function gnomonicRaw(x, y) {
	  var cy = cos$1(y),
	      k = cos$1(x) * cy;
	  return [cy * sin$1(x) / k, sin$1(y) / k];
	}

	gnomonicRaw.invert = azimuthalInvert(atan);

	function geoGnomonic () {
	  return projection(gnomonicRaw).scale(144.049).clipAngle(60);
	}

	function orthographicRaw(x, y) {
	  return [cos$1(y) * sin$1(x), sin$1(y)];
	}

	orthographicRaw.invert = azimuthalInvert(asin$1);

	function geoOrthographic () {
	  return projection(orthographicRaw).scale(249.5).clipAngle(90 + epsilon$4);
	}

	function stereographicRaw(x, y) {
	  var cy = cos$1(y),
	      k = 1 + cos$1(x) * cy;
	  return [cy * sin$1(x) / k, sin$1(y) / k];
	}

	stereographicRaw.invert = azimuthalInvert(function (z) {
	  return 2 * atan(z);
	});

	function geoStereographic () {
	  return projection(stereographicRaw).scale(250).clipAngle(142);
	}

	function transverseMercatorRaw(lambda, phi) {
	  return [log$1(tan((halfPi$3 + phi) / 2)), -lambda];
	}

	transverseMercatorRaw.invert = function (x, y) {
	  return [-y, 2 * atan(exp(x)) - halfPi$3];
	};

	function geoTransverseMercator () {
	  var m = mercatorProjection(transverseMercatorRaw),
	      center = m.center,
	      rotate = m.rotate;

	  m.center = function (_) {
	    return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
	  };

	  m.rotate = function (_) {
	    return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
	  };

	  return rotate([0, 0, 90]).scale(159.155);
	}



	var d3 = Object.freeze({
		version: version,
		bisect: bisectRight,
		bisectRight: bisectRight,
		bisectLeft: bisectLeft,
		ascending: ascending,
		bisector: bisector,
		descending: descending,
		deviation: deviation,
		extent: extent,
		histogram: histogram,
		thresholdFreedmanDiaconis: thresholdFreedmanDiaconis,
		thresholdScott: thresholdScott,
		thresholdSturges: sturges,
		max: max,
		mean: mean,
		median: median,
		merge: merge,
		min: min,
		pairs: pairs,
		permute: permute,
		quantile: threshold,
		range: range,
		scan: scan,
		shuffle: shuffle,
		sum: sum,
		ticks: ticks,
		tickStep: tickStep,
		transpose: transpose,
		variance: variance,
		zip: zip,
		entries: entries,
		keys: keys,
		values: values,
		map: map$1,
		set: set,
		nest: nest,
		randomUniform: randomUniform,
		randomNormal: normal,
		randomLogNormal: randomLogNormal,
		randomBates: randomBates,
		randomIrwinHall: irwinHall,
		randomExponential: randomExponential,
		easeLinear: linear,
		easeQuad: quadInOut,
		easeQuadIn: quadIn,
		easeQuadOut: quadOut,
		easeQuadInOut: quadInOut,
		easeCubic: easeCubicInOut,
		easeCubicIn: cubicIn,
		easeCubicOut: cubicOut,
		easeCubicInOut: easeCubicInOut,
		easePoly: polyInOut,
		easePolyIn: polyIn,
		easePolyOut: polyOut,
		easePolyInOut: polyInOut,
		easeSin: sinInOut,
		easeSinIn: sinIn,
		easeSinOut: sinOut,
		easeSinInOut: sinInOut,
		easeExp: expInOut,
		easeExpIn: expIn,
		easeExpOut: expOut,
		easeExpInOut: expInOut,
		easeCircle: circleInOut,
		easeCircleIn: circleIn,
		easeCircleOut: circleOut,
		easeCircleInOut: circleInOut,
		easeBounce: bounceOut,
		easeBounceIn: bounceIn,
		easeBounceOut: bounceOut,
		easeBounceInOut: bounceInOut,
		easeBack: backInOut,
		easeBackIn: backIn,
		easeBackOut: backOut,
		easeBackInOut: backInOut,
		easeElastic: elasticOut,
		easeElasticIn: elasticIn,
		easeElasticOut: elasticOut,
		easeElasticInOut: elasticInOut,
		polygonArea: polygonArea,
		polygonCentroid: polygonCentroid,
		polygonHull: polygonHull,
		polygonContains: polygonContains,
		polygonLength: polygonLength,
		path: path,
		quadtree: quadtree,
		queue: queue,
		arc: arc,
		area: area,
		line: line,
		pie: pie,
		radialArea: radialArea,
		radialLine: radialLine$1,
		symbol: symbol,
		symbols: symbols,
		symbolCircle: circle,
		symbolCross: cross$1,
		symbolDiamond: diamond,
		symbolSquare: square,
		symbolStar: star,
		symbolTriangle: triangle,
		symbolWye: wye,
		curveBasisClosed: curveBasisClosed,
		curveBasisOpen: curveBasisOpen,
		curveBasis: curveBasis,
		curveBundle: curveBundle,
		curveCardinalClosed: curveCardinalClosed,
		curveCardinalOpen: curveCardinalOpen,
		curveCardinal: curveCardinal,
		curveCatmullRomClosed: curveCatmullRomClosed,
		curveCatmullRomOpen: curveCatmullRomOpen,
		curveCatmullRom: curveCatmullRom,
		curveLinearClosed: curveLinearClosed,
		curveLinear: curveLinear,
		curveMonotoneX: monotoneX,
		curveMonotoneY: monotoneY,
		curveNatural: curveNatural,
		curveStep: curveStep,
		curveStepAfter: stepAfter,
		curveStepBefore: stepBefore,
		stack: stack,
		stackOffsetExpand: stackOffsetExpand,
		stackOffsetNone: none,
		stackOffsetSilhouette: stackOffsetSilhouette,
		stackOffsetWiggle: stackOffsetWiggle,
		stackOrderAscending: ascending$1,
		stackOrderDescending: stackOrderDescending,
		stackOrderInsideOut: stackOrderInsideOut,
		stackOrderNone: none$1,
		stackOrderReverse: stackOrderReverse,
		color: color,
		rgb: colorRgb,
		hsl: colorHsl,
		lab: lab,
		hcl: colorHcl,
		cubehelix: cubehelix,
		interpolate: interpolate,
		interpolateArray: array$1,
		interpolateDate: date,
		interpolateNumber: interpolateNumber,
		interpolateObject: object,
		interpolateRound: interpolateRound,
		interpolateString: interpolateString,
		interpolateTransformCss: interpolateTransform$1,
		interpolateTransformSvg: interpolateTransform$2,
		interpolateZoom: interpolateZoom,
		interpolateRgb: interpolateRgb,
		interpolateRgbBasis: rgbBasis,
		interpolateRgbBasisClosed: rgbBasisClosed,
		interpolateHsl: interpolateHsl,
		interpolateHslLong: hslLong,
		interpolateLab: lab$1,
		interpolateHcl: interpolateHcl,
		interpolateHclLong: hclLong,
		interpolateCubehelix: interpolateCubehelix,
		interpolateCubehelixLong: interpolateCubehelixLong,
		interpolateBasis: basis$1,
		interpolateBasisClosed: basisClosed,
		quantize: quantize,
		dispatch: dispatch,
		dsvFormat: dsv,
		csvParse: csvParse,
		csvParseRows: csvParseRows,
		csvFormat: csvFormat,
		csvFormatRows: csvFormatRows,
		tsvParse: tsvParse,
		tsvParseRows: tsvParseRows,
		tsvFormat: tsvFormat,
		tsvFormatRows: tsvFormatRows,
		request: request,
		html: html,
		json: json,
		text: text,
		xml: xml,
		csv: csv$1,
		tsv: tsv$1,
		now: now,
		timer: timer,
		timerFlush: timerFlush,
		timeout: timeout$1,
		interval: interval$1,
		timeInterval: newInterval,
		timeMillisecond: millisecond,
		timeMilliseconds: milliseconds,
		timeSecond: second,
		timeSeconds: seconds,
		timeMinute: minute,
		timeMinutes: minutes,
		timeHour: hour,
		timeHours: hours,
		timeDay: day,
		timeDays: days,
		timeWeek: timeWeek,
		timeWeeks: sundays,
		timeSunday: timeWeek,
		timeSundays: sundays,
		timeMonday: timeMonday,
		timeMondays: mondays,
		timeTuesday: tuesday,
		timeTuesdays: tuesdays,
		timeWednesday: wednesday,
		timeWednesdays: wednesdays,
		timeThursday: thursday,
		timeThursdays: thursdays,
		timeFriday: friday,
		timeFridays: fridays,
		timeSaturday: saturday,
		timeSaturdays: saturdays,
		timeMonth: month,
		timeMonths: months,
		timeYear: year,
		timeYears: years,
		utcMillisecond: millisecond,
		utcMilliseconds: milliseconds,
		utcSecond: second,
		utcSeconds: seconds,
		utcMinute: utcMinute,
		utcMinutes: utcMinutes,
		utcHour: utcHour,
		utcHours: utcHours,
		utcDay: utcDay,
		utcDays: utcDays,
		utcWeek: utcWeek,
		utcWeeks: utcSundays,
		utcSunday: utcWeek,
		utcSundays: utcSundays,
		utcMonday: utcMonday,
		utcMondays: utcMondays,
		utcTuesday: utcTuesday,
		utcTuesdays: utcTuesdays,
		utcWednesday: utcWednesday,
		utcWednesdays: utcWednesdays,
		utcThursday: utcThursday,
		utcThursdays: utcThursdays,
		utcFriday: utcFriday,
		utcFridays: utcFridays,
		utcSaturday: utcSaturday,
		utcSaturdays: utcSaturdays,
		utcMonth: utcMonth,
		utcMonths: utcMonths,
		utcYear: utcYear,
		utcYears: utcYears,
		get format () { return format; },
		get formatPrefix () { return formatPrefix; },
		formatLocale: formatLocale,
		formatDefaultLocale: defaultLocale,
		formatSpecifier: formatSpecifier,
		precisionFixed: precisionFixed,
		precisionPrefix: precisionPrefix,
		precisionRound: precisionRound,
		get timeFormat () { return timeFormat; },
		get timeParse () { return timeParse; },
		get utcFormat () { return utcFormat; },
		get utcParse () { return utcParse; },
		isoFormat: formatIso,
		isoParse: parseIso,
		timeFormatLocale: formatLocale$1,
		timeFormatDefaultLocale: defaultLocale$1,
		scaleBand: band,
		scalePoint: point$4,
		scaleIdentity: identity$4,
		scaleLinear: linear$2,
		scaleLog: log,
		scaleOrdinal: ordinal,
		scaleImplicit: implicit,
		scalePow: pow,
		scaleSqrt: sqrt,
		scaleQuantile: quantile,
		scaleQuantize: quantize$1,
		scaleThreshold: threshold$1,
		scaleTime: scaleTime,
		scaleUtc: scaleUtc,
		schemeCategory10: schemeCategory10,
		schemeCategory20b: schemeCategory20b,
		schemeCategory20c: schemeCategory20c,
		schemeCategory20: schemeCategory20,
		scaleSequential: sequential,
		interpolateCubehelixDefault: interpolateCubehelixDefault,
		interpolateRainbow: interpolateRainbow,
		interpolateWarm: warm,
		interpolateCool: cool,
		interpolateViridis: interpolateViridis,
		interpolateMagma: magma,
		interpolateInferno: inferno,
		interpolatePlasma: plasma,
		creator: creator,
		customEvent: customEvent,
		get event () { return event; },
		local: local,
		matcher: matcher$1,
		mouse: mouse,
		namespace: namespace,
		namespaces: namespaces,
		select: select,
		selectAll: selectAll,
		selection: selection,
		selector: selector,
		selectorAll: selectorAll,
		touch: touch,
		touches: touches,
		window: window$1,
		active: active,
		interrupt: interrupt,
		transition: transition,
		axisTop: axisTop,
		axisRight: axisRight,
		axisBottom: axisBottom,
		axisLeft: axisLeft,
		cluster: cluster,
		hierarchy: hierarchy,
		pack: pack$1,
		packSiblings: packSiblings,
		packEnclose: enclose,
		partition: partition,
		stratify: stratify,
		tree: tree,
		treemap: treemap,
		treemapBinary: treemapBinary,
		treemapDice: treemapDice,
		treemapSlice: treemapSlice,
		treemapSliceDice: treemapSliceDice,
		treemapSquarify: squarify,
		treemapResquarify: treemapResquarify,
		forceCenter: forceCenter,
		forceCollide: forceCollide,
		forceLink: forceLink,
		forceManyBody: forceManyBody,
		forceSimulation: forceSimulation,
		forceX: forceX,
		forceY: forceY,
		drag: drag,
		dragDisable: dragDisable,
		dragEnable: dragEnable,
		voronoi: voronoi,
		zoom: zoom,
		zoomIdentity: identity$6,
		zoomTransform: transform,
		brush: brush,
		brushX: brushX,
		brushY: brushY,
		brushSelection: brushSelection,
		chord: chord,
		ribbon: ribbon,
		geoAlbers: albers,
		geoAlbersUsa: geoAlbersUsa,
		geoArea: geoArea,
		geoAzimuthalEqualArea: geoAzimuthalEqualArea,
		geoAzimuthalEqualAreaRaw: azimuthalEqualAreaRaw,
		geoAzimuthalEquidistant: geoAzimuthalEquidistant,
		geoAzimuthalEquidistantRaw: azimuthalEquidistantRaw,
		geoBounds: geoBounds,
		geoCentroid: geoCentroid,
		geoCircle: geoCircle,
		geoClipExtent: geoClipExtent,
		geoConicConformal: geoConicConformal,
		geoConicConformalRaw: conicConformalRaw,
		geoConicEqualArea: conicEqualArea,
		geoConicEqualAreaRaw: conicEqualAreaRaw,
		geoConicEquidistant: geoConicEquidistant,
		geoConicEquidistantRaw: conicEquidistantRaw,
		geoDistance: geoDistance,
		geoEquirectangular: geoEquirectangular,
		geoEquirectangularRaw: equirectangularRaw,
		geoGnomonic: geoGnomonic,
		geoGnomonicRaw: gnomonicRaw,
		geoGraticule: geoGraticule,
		geoInterpolate: geoInterpolate,
		geoLength: length$1,
		geoMercator: geoMercator,
		geoMercatorRaw: mercatorRaw,
		geoOrthographic: geoOrthographic,
		geoOrthographicRaw: orthographicRaw,
		geoPath: geoPath,
		geoProjection: projection,
		geoProjectionMutator: projectionMutator,
		geoRotation: geoRotation,
		geoStereographic: geoStereographic,
		geoStereographicRaw: stereographicRaw,
		geoStream: geoStream,
		geoTransform: geoTransform,
		geoTransverseMercator: geoTransverseMercator,
		geoTransverseMercatorRaw: transverseMercatorRaw
	});

	var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

	function createCommonjsModule(fn, module) {
		return module = { exports: {} }, fn(module, module.exports), module.exports;
	}

	var bootstrapNative = createCommonjsModule(function (module) {
	// Native Javascript for Bootstrap 3 v1.0.51 | © dnp_theme | MIT-License
	(function (root, factory) {
	  if (typeof define === 'function' && define.amd) {
	    // AMD support:
	    define([], factory);
	  } else if (typeof module === 'object' && module.exports) {
	    // CommonJS-like:
	    module.exports = factory();
	  } else {
	    // Browser globals (root is window)
	    var bsn = factory();
	    root.Affix = bsn.Affix;
	    root.Alert = bsn.Alert;
	    root.Button = bsn.Button;
	    root.Carousel = bsn.Carousel;
	    root.Collapse = bsn.Collapse;
	    root.Dropdown = bsn.Dropdown;
	    root.Modal = bsn.Modal;
	    root.Popover = bsn.Popover;
	    root.ScrollSpy = bsn.ScrollSpy;
	    root.Tab = bsn.Tab;
	    root.Tooltip = bsn.Tooltip;
	  }
	})(commonjsGlobal, function () {
	  // Native Javascript for Bootstrap 3 | Internal Utility Functions
	  // by dnp_theme

	  var addClass = function (el, c) {
	    // where modern browsers fail, use classList
	    if (el.classList) {
	      el.classList.add(c);
	    } else {
	      el.className += ' ' + c;el.offsetWidth;
	    }
	  },
	      removeClass = function (el, c) {
	    if (el.classList) {
	      el.classList.remove(c);
	    } else {
	      el.className = el.className.replace(c, '').replace(/^\s+|\s+$/g, '');
	    }
	  },
	      isIE = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})").exec(navigator.userAgent) != null ? parseFloat(RegExp.$1) : false,
	      getClosest = function (el, s) {
	    //el is the element and s the selector of the closest item to find
	    // source http://gomakethings.com/climbing-up-and-down-the-dom-tree-with-vanilla-javascript/
	    var f = s.charAt(0);
	    for (; el && el !== document; el = el.parentNode) {
	      // Get closest match
	      if (f === '.') {
	        // If selector is a class
	        if (document.querySelector(s) !== undefined) {
	          return el;
	        }
	      }
	      if (f === '#') {
	        // If selector is an ID
	        if (el.id === s.substr(1)) {
	          return el;
	        }
	      }
	    }
	    return false;
	  },
	      isElementInViewport = function (t) {
	    // check if this.tooltip is in viewport
	    var r = t.getBoundingClientRect();
	    return r.top >= 0 && r.left >= 0 && r.bottom <= (window.innerHeight || document.documentElement.clientHeight) && r.right <= (window.innerWidth || document.documentElement.clientWidth);
	  };

	  // Native Javascript for Bootstrap 3 | Affix
	  // by dnp_theme

	  //AFFIX DEFINITION
	  var Affix = function (element, options) {
	    options = options || {};

	    this.element = typeof element === 'object' ? element : document.querySelector(element);
	    this.options = {};
	    this.options.target = options.target ? typeof options.target === 'object' ? options.target : document.querySelector(options.target) : null; // target is an object
	    this.options.offsetTop = options.offsetTop && options.offsetTop ? options.offsetTop === 'function' ? options.offsetTop() : parseInt(options.offsetTop, 0) : 0; // offset option is an integer number or function to determine that number
	    this.options.offsetBottom = options.offsetBottom && options.offsetBottom ? options.offsetBottom === 'function' ? options.offsetBottom() : parseInt(options.offsetBottom, 0) : null;

	    if (!this.element && !(this.options.target || this.options.offsetTop || this.options.offsetBottom)) {
	      return;
	    }

	    var self = this;

	    this.processOffsetTop = function () {
	      if (this.options.target !== null) {
	        return this.options.target.getBoundingClientRect().top + this.scrollOffset();
	      } else if (this.options.offsetTop !== null) {
	        return this.options.offsetTop;
	      }
	    };
	    this.processOffsetBottom = function () {
	      if (this.options.offsetBottom !== null) {
	        var maxScroll = this.getMaxScroll();
	        return maxScroll - this.element.offsetHeight - this.options.offsetBottom;
	      }
	    };
	    this.checkPosition = function () {
	      this.getPinOffsetTop = this.processOffsetTop;
	      this.getPinOffsetBottom = this.processOffsetBottom;
	    };
	    this.scrollOffset = function () {
	      return window.pageYOffset || document.documentElement.scrollTop;
	    };
	    this.pinTop = function () {
	      if (!/\baffix/.test(this.element.className)) {
	        this.element.className += ' affix';
	        this.affixed = true;
	      }
	    };
	    this.unPinTop = function () {
	      if (/\baffix/.test(this.element.className)) {
	        this.element.className = this.element.className.replace(' affix', '');
	        this.affixed = false;
	      }
	    };
	    this.pinBottom = function () {
	      if (!/\baffix-bottom/.test(this.element.className)) {
	        this.element.className += ' affix-bottom';
	        this.affixedBottom = true;
	      }
	    };
	    this.unPinBottom = function () {
	      if (/\baffix-bottom/.test(this.element.className)) {
	        this.element.className = this.element.className.replace(' affix-bottom', '');
	        this.affixedBottom = false;
	      }
	    };
	    this.updatePin = function () {
	      if (this.affixed === false && parseInt(this.processOffsetTop(), 0) - parseInt(this.scrollOffset(), 0) < 0) {
	        this.pinTop();
	      } else if (this.affixed === true && parseInt(this.scrollOffset(), 0) <= parseInt(this.getPinOffsetTop(), 0)) {
	        this.unPinTop();
	      }

	      if (this.affixedBottom === false && parseInt(this.processOffsetBottom(), 0) - parseInt(this.scrollOffset(), 0) < 0) {
	        this.pinBottom();
	      } else if (this.affixedBottom === true && parseInt(this.scrollOffset(), 0) <= parseInt(this.getPinOffsetBottom(), 0)) {
	        this.unPinBottom();
	      }
	    };
	    this.updateAffix = function () {
	      // Unpin and check position again
	      this.unPinTop();
	      this.unPinBottom();
	      this.checkPosition();

	      this.updatePin(); // If any case update values again
	    };
	    this.getMaxScroll = function () {
	      return Math.max(document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, document.documentElement.offsetHeight);
	    };
	    this.scrollEvent = function () {
	      window.addEventListener('scroll', function () {
	        self.updatePin();
	      }, false);
	    };
	    this.resizeEvent = function () {
	      var dl = isIE && isIE < 10 ? 500 : 50;
	      window.addEventListener('resize', function () {
	        setTimeout(function () {
	          self.updateAffix();
	        }, dl);
	      }, false);
	    };
	    // init
	    this.affixed = false;
	    this.affixedBottom = false;
	    this.getPinOffsetTop = 0;
	    this.getPinOffsetBottom = null;

	    //actions
	    this.checkPosition();
	    this.updateAffix();
	    this.scrollEvent();
	    this.resizeEvent();
	  };

	  (function () {
	    // AFFIX DATA API
	    // =================
	    var Affixes = document.querySelectorAll('[data-spy="affix"]'),
	        i = 0,
	        afl = Affixes.length;
	    for (i; i < afl; i++) {
	      var item = Affixes[i],
	          options = {};
	      options.offsetTop = item.getAttribute('data-offset-top');
	      options.offsetBottom = item.getAttribute('data-offset-bottom');
	      options.target = item.getAttribute('data-target');

	      if (item && (options.offsetTop !== null || options.offsetBottom !== null || options.target !== null)) {
	        //don't do anything unless we have something valid to pin
	        new Affix(item, options);
	      }
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Alert
	  // by dnp_theme

	  // ALERT DEFINITION
	  // ===================
	  var Alert = function (element) {
	    this.btn = typeof element === 'object' ? element : document.querySelector(element);
	    this.alert = null;
	    this.duration = 150; // default alert transition duration

	    var self = this;

	    this.close = function (e) {
	      var target = e.target;
	      self.btn = target.getAttribute('data-dismiss') === 'alert' && target.className === 'close' ? target : target.parentNode;
	      self.alert = self.btn.parentNode;

	      if (self.alert !== null && self.btn.getAttribute('data-dismiss') === 'alert' && /\bin/.test(self.alert.className)) {
	        self.alert.className = self.alert.className.replace(' in', '');
	        setTimeout(function () {
	          self.alert && self.alert.parentNode.removeChild(self.alert);
	        }, self.duration);
	      }
	    };
	    document.addEventListener('click', this.close, false); //delegate to all alerts, including those inserted later into the DOM
	  };

	  (function () {
	    // ALERT DATA API
	    // =================
	    var Alerts = document.querySelectorAll('[data-dismiss="alert"]'),
	        i = 0,
	        all = Alerts.length;
	    for (i; i < all; i++) {
	      new Alert(Alerts[i]);
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Button
	  // by dnp_theme

	  // BUTTON DEFINITION
	  // ===================
	  var Button = function (element, option) {
	    this.btn = typeof element === 'object' ? element : document.querySelector(element);
	    this.option = typeof option === 'string' ? option : null;

	    var self = this,
	        changeEvent = 'CustomEvent' in window && window.dispatchEvent ? new CustomEvent('bs.button.change') : null; // The custom event that will be triggered on demand

	    // assign event to a trigger function
	    function triggerChange(t) {
	      if (changeEvent) {
	        t.dispatchEvent(changeEvent);
	      }
	    }

	    this.setState = function () {
	      if (this.option === 'loading') {
	        addClass(this.btn, 'disabled');
	        this.btn.setAttribute('disabled', 'disabled');
	      }
	      this.btn.innerHTML = this.state;
	    };

	    this.reset = function () {
	      if (/\bdisabled/.test(this.btn.className) || this.btn.getAttribute('disabled') === 'disabled') {
	        removeClass(this.btn, 'disabled');
	        this.btn.removeAttribute('disabled');
	      }
	      this.btn.innerHTML = this.btn.getAttribute('data-original-text');
	    };

	    this.toggle = function (e) {
	      var parent = e.target.parentNode,
	          label = e.target.tagName === 'LABEL' ? e.target : parent.tagName === 'LABEL' ? parent : null; // the .btn label

	      if (!label) return; //react if a label or its immediate child is clicked

	      var target = this,
	          //e.currentTarget || e.srcElement; // the button group, the target of the handler function
	      labels = target.querySelectorAll('.btn'),
	          ll = labels.length,
	          i = 0,
	          // all the button group buttons
	      input = label.getElementsByTagName('INPUT')[0];

	      if (!input) return; //return if no input found

	      //manage the dom manipulation
	      if (input.type === 'checkbox') {
	        //checkboxes
	        if (!input.checked) {
	          addClass(label, 'active');
	          input.getAttribute('checked');
	          input.setAttribute('checked', 'checked');
	          input.checked = true;
	        } else {
	          removeClass(label, 'active');
	          input.getAttribute('checked');
	          input.removeAttribute('checked');
	          input.checked = false;
	        }
	        triggerChange(input); //trigger the change for the input
	        triggerChange(self.btn); //trigger the change for the btn-group
	      }

	      if (input.type === 'radio') {
	        // radio buttons
	        if (!input.checked) {
	          // don't trigger if already active
	          addClass(label, 'active');
	          input.setAttribute('checked', 'checked');
	          input.checked = true;
	          triggerChange(self.btn);
	          triggerChange(input); //trigger the change

	          for (i; i < ll; i++) {
	            var l = labels[i];
	            if (l !== label && /\bactive/.test(l.className)) {
	              var inp = l.getElementsByTagName('INPUT')[0];
	              removeClass(l, 'active');
	              inp.removeAttribute('checked');
	              inp.checked = false;
	              triggerChange(inp); // trigger the change
	            }
	          }
	        }
	      }
	    };
	    // init
	    if (/\bbtn/.test(this.btn.className)) {
	      if (this.option && this.option !== 'reset') {

	        this.state = this.btn.getAttribute('data-' + this.option + '-text') || null;

	        !this.btn.getAttribute('data-original-text') && this.btn.setAttribute('data-original-text', self.btn.innerHTML.replace(/^\s+|\s+$/g, ''));
	        this.setState();
	      } else if (this.option === 'reset') {
	        this.reset();
	      }
	    }
	    if (/\bbtn-group/.test(this.btn.className)) {
	      this.btn.addEventListener('click', this.toggle, false);
	    }
	  };

	  (function () {
	    // BUTTON DATA API
	    // =================
	    var Buttons = document.querySelectorAll('[data-toggle=button]'),
	        i = 0,
	        btl = Buttons.length;
	    for (i; i < btl; i++) {
	      new Button(Buttons[i]);
	    }

	    var ButtonGroups = document.querySelectorAll('[data-toggle=buttons]'),
	        j = 0,
	        bgl = ButtonGroups.length;
	    for (j; j < bgl; j++) {
	      new Button(ButtonGroups[j]);
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Carousel
	  // by dnp_theme

	  // CAROUSEL DEFINITION
	  // ===================
	  var Carousel = function (element, options) {
	    options = options || {};

	    this.carousel = typeof element === 'object' ? element : document.querySelector(element);
	    this.options = {}; //replace extend
	    this.options.keyboard = options.keyboard === 'true' ? true : false;
	    this.options.pause = options.pause ? options.pause : 'hover'; // false / hover

	    // bootstrap carousel default transition duration / option
	    this.duration = 600;
	    this.options.duration = isIE && isIE < 10 ? 0 : parseInt(options.duration) || this.duration;

	    var items = this.carousel.querySelectorAll('.item'),
	        il = items.length; //this is an object
	    this.controls = this.carousel.querySelectorAll('.carousel-control');
	    this.prev = this.controls[0];
	    this.next = this.controls[1];
	    this.slides = [];for (var i = 0; i < il; i++) {
	      this.slides.push(items[i]);
	    } // this is an array
	    this.indicator = this.carousel.querySelector(".carousel-indicators"); // object
	    this.indicators = this.carousel.querySelectorAll(".carousel-indicators li"); // object
	    this.total = this.slides.length;
	    this.timer = null;
	    this.direction = null;
	    this.index = 0;

	    var self = this;

	    if (options.interval === 'false') {
	      this.options.interval = false;
	    } else {
	      this.options.interval = parseInt(options.interval) || 5000;
	    }

	    this.cycle = function (e) {

	      this.direction = 'left';
	      this.timer = setInterval(function () {
	        self.index++;
	        if (self.index == self.slides.length) {
	          self.index = 0;
	        }
	        self._slideTo(self.index, e);
	      }, this.options.interval);
	    };
	    this.pause = function () {
	      var pauseHandler = function () {
	        if (self.options.interval !== false && !/\bpaused/.test(self.carousel.className)) {
	          self.carousel.className += ' paused';
	          clearInterval(self.timer);
	          self.timer = null;
	        }
	      };
	      var resumeHandler = function () {
	        if (self.options.interval !== false && /\bpaused/.test(self.carousel.className)) {
	          self.cycle();
	          self.carousel.className = self.carousel.className.replace(/\bpaused/, '');
	        }
	      };
	      self.carousel.addEventListener("mouseenter", pauseHandler, false);
	      self.carousel.addEventListener("mouseleave", resumeHandler, false);
	      self.carousel.addEventListener("touchstart", pauseHandler, false);
	      self.carousel.addEventListener("touchend", resumeHandler, false);
	    };
	    this._slideTo = function (next, e) {
	      var active = this._getActiveIndex(); // the current active
	      //determine type
	      var direction = this.direction;
	      var dr = direction === 'left' ? 'next' : 'prev';
	      var slid = null,
	          slide = null;

	      //register events
	      if ('CustomEvent' in window && window.dispatchEvent) {
	        slid = new CustomEvent("slid.bs.carousel");
	        slide = new CustomEvent("slide.bs.carousel");
	      }
	      if (slide) {
	        this.carousel.dispatchEvent(slide);
	      } //here we go with the slide

	      this._removeEventListeners();
	      clearInterval(this.timer);
	      this.timer = null;
	      this._curentPage(this.indicators[next]);

	      if (/\bslide/.test(this.carousel.className) && !(isIE && isIE < 10)) {
	        this.slides[next].className += ' ' + dr;
	        this.slides[next].offsetWidth;
	        this.slides[next].className += ' ' + direction;
	        this.slides[active].className += ' ' + direction;

	        setTimeout(function () {
	          //we're gonna fake waiting for the animation to finish, cleaner and better
	          self._addEventListeners();

	          self.slides[next].className += ' active';
	          self.slides[active].className = self.slides[active].className.replace(' active', '');

	          self.slides[next].className = self.slides[next].className.replace(' ' + dr, '');
	          self.slides[next].className = self.slides[next].className.replace(' ' + direction, '');
	          self.slides[active].className = self.slides[active].className.replace(' ' + direction, '');

	          if (self.options.interval !== false && !/\bpaused/.test(self.carousel.className)) {
	            clearInterval(self.timer);self.cycle();
	          }
	          if (slid) {
	            self.carousel.dispatchEvent(slid);
	          } //here we go with the slid
	        }, this.options.duration + 100);
	      } else {
	        this.slides[next].className += ' active';
	        this.slides[next].offsetWidth;
	        this.slides[active].className = this.slides[active].className.replace(' active', '');
	        setTimeout(function () {
	          self._addEventListeners();
	          if (self.options.interval !== false && !/\bpaused/.test(self.carousel.className)) {
	            clearInterval(self.timer);self.cycle();
	          }
	          if (slid) {
	            self.carousel.dispatchEvent(slid);
	          } //here we go with the slid
	        }, this.options.duration + 100);
	      }
	    };
	    this._addEventListeners = function () {
	      this.next && this.next.addEventListener("click", this.controlsHandler, false);
	      this.prev && this.prev.addEventListener("click", this.controlsHandler, false);

	      this.indicator && this.indicator.addEventListener("click", this.indicatorHandler, false);

	      this.options.keyboard === true && window.addEventListener('keydown', this.keyHandler, false);
	    };
	    this._removeEventListeners = function () {
	      // prevent mouse bubbles while animating
	      this.next && this.next.removeEventListener("click", this.controlsHandler, false);
	      this.prev && this.prev.removeEventListener("click", this.controlsHandler, false);

	      this.indicator && this.indicator.removeEventListener("click", this.indicatorHandler, false);

	      this.options.keyboard === true && window.removeEventListener('keydown', this.keyHandler, false);
	    };
	    this._getActiveIndex = function () {
	      return this.slides.indexOf(this.carousel.querySelector('.item.active'));
	    };
	    this._curentPage = function (p) {
	      for (var i = 0; i < this.indicators.length; ++i) {
	        var a = this.indicators[i];
	        a.className = "";
	      }
	      if (p) p.className = "active";
	    };
	    this.indicatorHandler = function (e) {
	      e.preventDefault();
	      var target = e.target;
	      var active = self._getActiveIndex(); // the current active

	      if (target && !/\bactive/.test(target.className) && target.getAttribute('data-slide-to')) {
	        var n = parseInt(target.getAttribute('data-slide-to'), 10);

	        self.index = n;

	        if (self.index == 0) {
	          self.index = 0;
	        } else if (self.index == self.total - 1) {
	          self.index = self.total - 1;
	        }

	        //determine direction first
	        if (active < self.index || active === self.total - 1 && self.index === 0) {
	          self.direction = 'left'; // next
	        } else if (active > self.index || active === 0 && self.index === self.total - 1) {
	          self.direction = 'right'; // prev
	        }
	      } else {
	        return false;
	      }

	      self._slideTo(self.index, e); //Do the slide
	    };
	    this.controlsHandler = function (e) {
	      var target = e.currentTarget || e.srcElement;

	      if (target === self.next) {
	        self.index++;
	        self.direction = 'left'; //set direction first

	        if (self.index == self.total - 1) {
	          self.index = self.total - 1;
	        } else if (self.index == self.total) {
	          self.index = 0;
	        }
	      } else if (target === self.prev) {
	        self.index--;
	        self.direction = 'right'; //set direction first

	        if (self.index == 0) {
	          self.index = 0;
	        } else if (self.index < 0) {
	          self.index = self.total - 1;
	        }
	      }

	      self._slideTo(self.index, e); //Do the slide
	    };
	    this.keyHandler = function (e) {
	      switch (e.which) {
	        case 39:
	          e.preventDefault();
	          self.index++;
	          self.direction = 'left';
	          if (self.index == self.total - 1) {
	            self.index = self.total - 1;
	          } else if (self.index == self.total) {
	            self.index = 0;
	          }
	          break;
	        case 37:
	          e.preventDefault();
	          self.index--;
	          self.direction = 'right';
	          if (self.index == 0) {
	            self.index = 0;
	          } else if (self.index < 0) {
	            self.index = self.total - 1;
	          }
	          break;
	        default:
	          return;
	      }
	      self._slideTo(self.index, e); //Do the slide
	    };

	    // init
	    if (this.options.interval !== false) {
	      this.cycle();
	    }

	    if (this.options && this.options.pause === 'hover' && this.options.interval !== false) {
	      this.pause();
	    }
	    this._addEventListeners();
	    this.next && this.next.addEventListener("click", function (e) {
	      e.preventDefault();
	    }, false);
	    this.prev && this.prev.addEventListener("click", function (e) {
	      e.preventDefault();
	    }, false);
	  };

	  (function () {
	    // CAROUSEL DATA API
	    // =================
	    var Carousels = document.querySelectorAll('[data-ride="carousel"]'),
	        i = 0,
	        crl = Carousels.length;
	    for (i; i < crl; i++) {
	      var c = Carousels[i],
	          options = {};
	      options.interval = c.getAttribute('data-interval') && c.getAttribute('data-interval');
	      options.pause = c.getAttribute('data-pause') && c.getAttribute('data-pause') || 'hover';
	      options.keyboard = c.getAttribute('data-keyboard') && c.getAttribute('data-keyboard') || false;
	      options.duration = c.getAttribute('data-duration') && c.getAttribute('data-duration') || false;
	      new Carousel(c, options);
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Collapse
	  // by dnp_theme

	  // COLLAPSE DEFINITION
	  // ===================
	  var Collapse = function (element, options) {
	    options = options || {};

	    this.btn = typeof element === 'object' ? element : document.querySelector(element);
	    this.accordion = null;
	    this.collapse = null;
	    this.duration = 300; // default collapse transition duration
	    this.options = {};
	    this.options.duration = isIE && isIE < 10 ? 0 : options.duration || this.duration;
	    var self = this;
	    var getOuterHeight = function (el) {
	      var s = el && (el.currentStyle || window.getComputedStyle(el)),
	          // the getComputedStyle polyfill would do this for us, but we want to make sure it does
	      btp = /px/.test(s.borderTopWidth) ? Math.round(s.borderTopWidth.replace('px', '')) : 0,
	          mtp = /px/.test(s.marginTop) ? Math.round(s.marginTop.replace('px', '')) : 0,
	          mbp = /px/.test(s.marginBottom) ? Math.round(s.marginBottom.replace('px', '')) : 0,
	          mte = /em/.test(s.marginTop) ? Math.round(s.marginTop.replace('em', '') * parseInt(s.fontSize)) : 0,
	          mbe = /em/.test(s.marginBottom) ? Math.round(s.marginBottom.replace('em', '') * parseInt(s.fontSize)) : 0;
	      return el.clientHeight + parseInt(btp) + parseInt(mtp) + parseInt(mbp) + parseInt(mte) + parseInt(mbe); //we need an accurate margin value
	    };

	    this.toggle = function (e) {
	      e.preventDefault();

	      if (!/\bin/.test(self.collapse.className)) {
	        self.open();
	      } else {
	        self.close();
	      }
	    }, this.close = function () {
	      this._close(this.collapse);
	      addClass(this.btn, 'collapsed');
	    }, this.open = function () {
	      this._open(this.collapse);
	      removeClass(this.btn, 'collapsed');

	      if (this.accordion !== null) {
	        var active = this.accordion.querySelectorAll('.collapse.in'),
	            al = active.length,
	            i = 0;
	        for (i; i < al; i++) {
	          if (active[i] !== this.collapse) this._close(active[i]);
	        }
	      }
	    };
	    this._open = function (c) {
	      this.removeEvent();
	      addClass(c, 'in');
	      c.setAttribute('aria-expanded', 'true');
	      addClass(c, 'collapsing');
	      setTimeout(function () {
	        c.style.height = self.getMaxHeight(c) + 'px';
	        c.style.overflowY = 'hidden';
	      }, 0);
	      setTimeout(function () {
	        c.style.height = '';
	        c.style.overflowY = '';
	        removeClass(c, 'collapsing');
	        self.addEvent();
	      }, this.options.duration);
	    };
	    this._close = function (c) {
	      this.removeEvent();
	      c.setAttribute('aria-expanded', 'false');
	      c.style.height = this.getMaxHeight(c) + 'px';
	      setTimeout(function () {
	        c.style.height = '0px';
	        c.style.overflowY = 'hidden';
	        addClass(c, 'collapsing');
	      }, 0);

	      setTimeout(function () {
	        removeClass(c, 'collapsing');
	        removeClass(c, 'in');
	        c.style.overflowY = '';
	        c.style.height = '';
	        self.addEvent();
	      }, this.options.duration);
	    };
	    this.getMaxHeight = function (l) {
	      // get collapse trueHeight and border
	      var h = 0;
	      for (var k = 0, ll = l.children.length; k < ll; k++) {
	        h += getOuterHeight(l.children[k]);
	      }
	      return h;
	    };
	    this.removeEvent = function () {
	      this.btn.removeEventListener('click', this.toggle, false);
	    };
	    this.addEvent = function () {
	      this.btn.addEventListener('click', this.toggle, false);
	    };
	    this.getTarget = function () {
	      var t = this.btn,
	          h = t.href && t.getAttribute('href').replace('#', ''),
	          d = t.getAttribute('data-target') && t.getAttribute('data-target'),
	          id = h || d && /#/.test(d) && d.replace('#', ''),
	          cl = d && d.charAt(0) === '.' && d,
	          //the navbar collapse trigger targets a class
	      c = id && document.getElementById(id) || cl && document.querySelector(cl);
	      return c;
	    };

	    // init
	    this.addEvent();
	    this.collapse = this.getTarget();
	    this.accordion = this.btn.getAttribute('data-parent') && getClosest(this.btn, this.btn.getAttribute('data-parent'));
	  };

	  (function () {
	    // COLLAPSE DATA API
	    // =================
	    var Collapses = document.querySelectorAll('[data-toggle="collapse"]'),
	        i = 0,
	        cll = Collapses.length;
	    for (i; i < cll; i++) {
	      var item = Collapses[i],
	          options = {};
	      options.duration = item.getAttribute('data-duration');
	      new Collapse(item, options);
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Dropdown
	  // by dnp_theme

	  // DROPDOWN DEFINITION
	  // ===================
	  var Dropdown = function (element) {
	    this.menu = typeof element === 'object' ? element : document.querySelector(element);
	    var self = this;

	    this.handle = function (e) {
	      // fix some Safari bug with <button>
	      var target = e.target || e.currentTarget,
	          children = [],
	          c = self.menu.parentNode.getElementsByTagName('*');
	      /\#$/g.test(target.href) && e.preventDefault();

	      for (var i = 0, l = c.length || 0; i < l; i++) {
	        l && children.push(c[i]);
	      }
	      if (target === self.menu || target.parentNode === self.menu || target.parentNode.parentNode === self.menu) {
	        self.toggle(e);
	      } else if (children && children.indexOf(target) > -1) {
	        return;
	      } else {
	        self.close();
	      }
	    };
	    this.toggle = function (e) {
	      if (/\bopen/.test(this.menu.parentNode.className)) {
	        this.close();
	        document.removeEventListener('keydown', this.key, false);
	      } else {
	        this.menu.parentNode.className += ' open';
	        this.menu.setAttribute('aria-expanded', true);
	        document.addEventListener('keydown', this.key, false);
	      }
	    };
	    this.key = function (e) {
	      if (e.which == 27) {
	        self.close();
	      }
	    };
	    this.close = function () {
	      self.menu.parentNode.className = self.menu.parentNode.className.replace(/\bopen/, '');
	      self.menu.setAttribute('aria-expanded', false);
	    };
	    this.menu.setAttribute('tabindex', '0'); // Fix onblur on Chrome | Safari
	    document.addEventListener('click', this.handle, false);
	  };

	  (function () {
	    // DROPDOWN DATA API
	    // =================
	    var Dropdowns = document.querySelectorAll('[data-toggle=dropdown]'),
	        i = 0,
	        ddl = Dropdowns.length;
	    for (i; i < ddl; i++) {
	      new Dropdown(Dropdowns[i]);
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Modal
	  // by dnp_theme

	  //MODAL DEFINITION
	  // ===============
	  var Modal = function (element, options) {
	    // element is the is the modal
	    options = options || {};
	    this.modal = typeof element === 'object' ? element : document.querySelector(element);
	    this.options = {};
	    this.options.backdrop = options.backdrop === 'false' ? false : true;
	    this.options.keyboard = options.keyboard === 'false' ? false : true;
	    this.options.content = options.content;
	    this.duration = options.duration || 300; // the default modal fade duration option
	    this.options.duration = isIE && isIE < 10 ? 0 : this.duration;
	    this.scrollbarWidth = 0;
	    this.dialog = this.modal.querySelector('.modal-dialog');
	    this.timer = 0;

	    var self = this,
	        getWindowWidth = function () {
	      var htmlRect = document.documentElement.getBoundingClientRect(),
	          fullWindowWidth = window.innerWidth || htmlRect.right - Math.abs(htmlRect.left);
	      return fullWindowWidth;
	    },
	        setScrollbar = function () {
	      var bodyStyle = window.getComputedStyle(document.body),
	          bodyPad = parseInt(bodyStyle.paddingRight, 10);
	      if (self.bodyIsOverflowing) {
	        document.body.style.paddingRight = bodyPad + self.scrollbarWidth + 'px';
	      }
	    },
	        resetScrollbar = function () {
	      document.body.style.paddingRight = '';
	    },
	        measureScrollbar = function () {
	      // thx walsh
	      var scrollDiv = document.createElement('div');
	      scrollDiv.className = 'modal-scrollbar-measure';
	      document.body.appendChild(scrollDiv);
	      var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
	      document.body.removeChild(scrollDiv);
	      return scrollbarWidth;
	    },
	        checkScrollbar = function () {
	      self.bodyIsOverflowing = document.body.clientWidth < getWindowWidth();
	      self.modalIsOverflowing = self.modal.scrollHeight > document.documentElement.clientHeight;
	      self.scrollbarWidth = measureScrollbar();
	    };

	    this.open = function () {
	      var currentOpen = document.querySelector('.modal.in');
	      if (currentOpen) {
	        clearTimeout(currentOpen.getAttribute('data-timer'));
	        removeClass(currentOpen, 'in');
	        setTimeout(function () {
	          currentOpen.setAttribute('aria-hidden', true);
	          currentOpen.style.display = '';
	        }, this.options.duration / 2);
	      }

	      if (this.options.backdrop) {
	        this.createOverlay();
	      } else {
	        this.overlay = null;
	      }

	      if (this.overlay) {
	        setTimeout(function () {
	          addClass(self.overlay, 'in');
	        }, 0);
	      }

	      clearTimeout(self.modal.getAttribute('data-timer'));
	      this.timer = setTimeout(function () {
	        self.modal.style.display = 'block';

	        checkScrollbar();
	        self.adjustDialog();
	        setScrollbar();

	        self.resize();
	        self.dismiss();
	        self.keydown();

	        addClass(document.body, 'modal-open');
	        addClass(self.modal, 'in');
	        self.modal.setAttribute('aria-hidden', false);
	      }, this.options.duration / 2);
	      this.modal.setAttribute('data-timer', this.timer);
	    };
	    this.close = function () {

	      if (this.overlay) {
	        removeClass(this.overlay, 'in');
	      }
	      removeClass(this.modal, 'in');
	      this.modal.setAttribute('aria-hidden', true);

	      clearTimeout(this.modal.getAttribute('data-timer'));
	      this.timer = setTimeout(function () {
	        removeClass(document.body, 'modal-open');
	        self.resize();
	        self.resetAdjustments();
	        resetScrollbar();

	        self.dismiss();
	        self.keydown();
	        self.modal.style.display = '';
	      }, this.options.duration / 2);
	      this.modal.setAttribute('data-timer', this.timer);

	      setTimeout(function () {
	        if (!document.querySelector('.modal.in')) {
	          self.removeOverlay();
	        }
	      }, this.options.duration);
	    };
	    this.content = function (content) {
	      return this.modal.querySelector('.modal-content').innerHTML = content;
	    };
	    this.createOverlay = function () {
	      var backdrop = document.createElement('div'),
	          overlay = document.querySelector('.modal-backdrop');
	      backdrop.setAttribute('class', 'modal-backdrop fade');

	      if (overlay) {
	        this.overlay = overlay;
	      } else {
	        this.overlay = backdrop;
	        document.body.appendChild(backdrop);
	      }
	    };
	    this.removeOverlay = function () {
	      var overlay = document.querySelector('.modal-backdrop');
	      if (overlay !== null && overlay !== undefined) {
	        document.body.removeChild(overlay);
	      }
	    };
	    this.keydown = function () {
	      function keyHandler(e) {
	        if (self.options.keyboard && e.which == 27) {
	          self.close();
	        }
	      }
	      if (!/\bin/.test(this.modal.className)) {
	        document.addEventListener('keydown', keyHandler, false);
	      } else {
	        document.removeEventListener('keydown', keyHandler, false);
	      }
	    };
	    this.trigger = function () {
	      var triggers = document.querySelectorAll('[data-toggle="modal"]'),
	          tgl = triggers.length,
	          i = 0;
	      for (i; i < tgl; i++) {
	        triggers[i].addEventListener('click', function (e) {
	          e.preventDefault();
	          var b = this,
	              // var b = e.target,
	          s = b.getAttribute('data-target') && b.getAttribute('data-target').replace('#', '') || b.getAttribute('href') && b.getAttribute('href').replace('#', '');
	          if (document.getElementById(s) === self.modal) {
	            self.open();
	          }
	        });
	      }
	    };
	    this._resize = function () {
	      var overlay = this.overlay || document.querySelector('.modal-backdrop'),
	          dim = { w: document.documentElement.clientWidth + 'px', h: document.documentElement.clientHeight + 'px' };
	      if (overlay !== null && /\bin/.test(overlay.className)) {
	        overlay.style.height = dim.h;overlay.style.width = dim.w;
	      }
	    };
	    this.oneResize = function () {
	      function oneResize() {
	        self._resize();
	        self.handleUpdate();
	        window.removeEventListener('resize', oneResize, false);
	      }
	      window.addEventListener('resize', oneResize, false);
	    };
	    this.resize = function () {
	      function resizeHandler() {
	        self._resize();
	        self.handleUpdate();
	      }

	      if (!/\bin/.test(this.modal.className)) {
	        window.addEventListener('resize', this.oneResize, false);
	      } else {
	        window.removeEventListener('resize', this.oneResize, false);
	      }
	    };
	    this.dismiss = function () {
	      function dismissHandler(e) {
	        if (e.target.parentNode.getAttribute('data-dismiss') === 'modal' || e.target.getAttribute('data-dismiss') === 'modal' || e.target === self.modal) {
	          // if ( this.parentNode.getAttribute('data-dismiss') === 'modal' || this.getAttribute('data-dismiss') === 'modal' || this === self.modal ) {
	          e.preventDefault();self.close();
	        }
	      }
	      if (!/\bin/.test(this.modal.className)) {
	        this.modal.addEventListener('click', dismissHandler, false);
	      } else {
	        this.modal.removeEventListener('click', dismissHandler, false);
	      }
	    };
	    // these following methods are used to handle overflowing modals
	    this.handleUpdate = function () {
	      this.adjustDialog();
	    };
	    this.adjustDialog = function () {
	      this.modal.style.paddingLeft = !this.bodyIsOverflowing && this.modalIsOverflowing ? this.scrollbarWidth + 'px' : '';
	      this.modal.style.paddingRight = this.bodyIsOverflowing && !this.modalIsOverflowing ? this.scrollbarWidth + 'px' : '';
	    };
	    this.resetAdjustments = function () {
	      this.modal.style.paddingLeft = '';
	      this.modal.style.paddingRight = '';
	    };
	    //init
	    this.trigger();
	    if (this.options.content && this.options.content !== undefined) {
	      this.content(this.options.content);
	    }
	  };

	  (function () {
	    // DATA API
	    var Modals = document.querySelectorAll('.modal'),
	        mdl = Modals.length,
	        i = 0;
	    for (i; i < mdl; i++) {
	      var modal = Modals[i],
	          options = {};
	      options.keyboard = modal.getAttribute('data-keyboard');
	      options.backdrop = modal.getAttribute('data-backdrop');
	      options.duration = modal.getAttribute('data-duration');
	      new Modal(modal, options);
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Popover
	  // by dnp_theme

	  // POPOVER DEFINITION
	  // ===================
	  var Popover = function (element, options) {
	    options = options || {};
	    this.link = typeof element === 'object' ? element : document.querySelector(element);
	    this.title = this.link.getAttribute('data-title') || null;
	    this.content = this.link.getAttribute('data-content') || null;
	    this.popover = null;
	    this.options = {};
	    this.options.template = options.template ? options.template : null;
	    this.options.trigger = options.trigger ? options.trigger : 'hover';
	    this.options.animation = options.animation && options.animation !== 'true' ? options.animation : 'true';
	    this.options.placement = options.placement ? options.placement : 'top';
	    this.options.delay = parseInt(options.delay) || 100;
	    this.options.dismiss = options.dismiss && options.dismiss === 'true' ? true : false;
	    this.duration = 150;
	    this.options.duration = isIE && isIE < 10 ? 0 : options.duration || this.duration;
	    this.options.container = document.body;
	    if (!this.content && !this.options.template) return;
	    this.timer = 0; // the link own event timer

	    var self = this,
	        events = 'onmouseleave' in this.link ? ['mouseenter', 'mouseleave'] : ['mouseover', 'mouseout'];

	    this.toggle = function (e) {
	      if (self.popover === null) {
	        self.open();
	      } else {
	        self.close();
	      }
	    };
	    this.open = function (e) {
	      clearTimeout(self.link.getAttribute('data-timer'));
	      self.timer = setTimeout(function () {
	        if (self.popover === null) {
	          self.createPopover();
	          self.stylePopover();
	          self.updatePopover();
	        }
	      }, self.options.duration);
	      self.link.setAttribute('data-timer', self.timer);
	    };
	    this.dismiss = function (e) {
	      if (self.popover && e.target === self.popover.querySelector('.close')) {
	        self.close();
	      }
	    };
	    this.close = function (e) {
	      clearTimeout(self.link.getAttribute('data-timer'));
	      self.timer = setTimeout(function () {
	        if (self.popover && self.popover !== null && /\bin/.test(self.popover.className)) {
	          self.popover.className = self.popover.className.replace(' in', '');
	          setTimeout(function () {
	            self.removePopover(); // for performance/testing reasons we can keep the popovers if we want
	          }, self.options.duration);
	        }
	      }, self.options.delay + self.options.duration);
	      self.link.setAttribute('data-timer', self.timer);
	    };
	    //remove the popover
	    this.removePopover = function () {
	      try {
	        this.popover && this.options.container.removeChild(this.popover);
	      } catch (err) {
	        console.log(err);
	      }
	      this.popover = null;
	      this.timer = null;
	    };
	    this.createPopover = function () {
	      this.popover = document.createElement('div');

	      if (this.content !== null && this.options.template === null) {
	        //create the popover from data attributes

	        this.popover.setAttribute('role', 'tooltip');

	        var popoverArrow = document.createElement('div');
	        popoverArrow.setAttribute('class', 'arrow');

	        if (this.title !== null) {
	          var popoverTitle = document.createElement('h3');
	          popoverTitle.setAttribute('class', 'popover-title');

	          if (this.options.dismiss) {
	            popoverTitle.innerHTML = this.title + '<button type="button" class="close">×</button>';
	          } else {
	            popoverTitle.innerHTML = this.title;
	          }
	          this.popover.appendChild(popoverTitle);
	        }

	        var popoverContent = document.createElement('div');
	        popoverContent.setAttribute('class', 'popover-content');

	        this.popover.appendChild(popoverArrow);
	        this.popover.appendChild(popoverContent);

	        //set popover content
	        if (this.options.dismiss && this.title === null) {
	          popoverContent.innerHTML = this.content + '<button type="button" class="close">×</button>';
	        } else {
	          popoverContent.innerHTML = this.content;
	        }
	      } else {
	        // or create the popover from template
	        var template = document.createElement('div');
	        template.innerHTML = this.options.template;
	        this.popover.innerHTML = template.firstChild.innerHTML;
	      }

	      //append to the container
	      this.options.container.appendChild(this.popover);
	      this.popover.style.display = 'block';
	    };
	    this.stylePopover = function (pos) {
	      var rect = this.link.getBoundingClientRect(),
	          placement = pos || this.options.placement,
	          animation = this.options.animation === 'true' ? 'fade' : '';

	      this.popover.setAttribute('class', 'popover ' + placement + ' ' + animation);

	      var ld = { w: rect.right - rect.left, h: rect.bottom - rect.top },
	          //link real dimensions
	      pd = { w: this.popover.offsetWidth, h: this.popover.offsetHeight },
	          //popover real dimensions
	      sYo = this.getScroll().y,
	          sXo = this.getScroll().x; //window vertical and horizontal scroll

	      //apply styling
	      if (/top/.test(placement)) {
	        //TOP
	        this.popover.style.top = rect.top + sYo - pd.h + 'px';
	        this.popover.style.left = rect.left + sXo - pd.w / 2 + ld.w / 2 + 'px';
	      } else if (/bottom/.test(placement)) {
	        //BOTTOM
	        this.popover.style.top = rect.top + sYo + ld.h + 'px';
	        this.popover.style.left = rect.left + sXo - pd.w / 2 + ld.w / 2 + 'px';
	      } else if (/left/.test(placement)) {
	        //LEFT
	        this.popover.style.top = rect.top + sYo - pd.h / 2 + ld.h / 2 + 'px';
	        this.popover.style.left = rect.left + sXo - pd.w + 'px';
	      } else if (/right/.test(placement)) {
	        //RIGHT
	        this.popover.style.top = rect.top + sYo - pd.h / 2 + ld.h / 2 + 'px';
	        this.popover.style.left = rect.left + sXo + ld.w + 'px';
	      }
	    };
	    this.updatePopover = function () {
	      var placement = null;
	      if (!isElementInViewport(this.popover)) {
	        placement = this.updatePlacement();
	      } else {
	        placement = this.options.placement;
	      }

	      this.stylePopover(placement);
	      this.popover.className += ' in';
	    };
	    this.updatePlacement = function () {
	      var pos = this.options.placement;
	      if (/top/.test(pos)) {
	        //TOP
	        return 'bottom';
	      } else if (/bottom/.test(pos)) {
	        //BOTTOM
	        return 'top';
	      } else if (/left/.test(pos)) {
	        //LEFT
	        return 'right';
	      } else if (/right/.test(pos)) {
	        //RIGHT
	        return 'left';
	      }
	    };
	    this.getScroll = function () {
	      return {
	        y: window.pageYOffset || document.documentElement.scrollTop,
	        x: window.pageXOffset || document.documentElement.scrollLeft
	      };
	    };
	    // init
	    if (this.options.trigger === 'hover') {
	      this.link.addEventListener(events[0], this.open, false);
	      if (!this.options.dismiss) {
	        this.link.addEventListener(events[1], this.close, false);
	      }
	    } else if (this.options.trigger === 'click') {
	      this.link.addEventListener('click', this.toggle, false);
	      if (!this.options.dismiss) {
	        this.link.addEventListener('blur', this.close, false);
	      }
	    } else if (this.options.trigger === 'focus') {
	      this.link.addEventListener('focus', this.toggle, false);
	      if (!this.options.dismiss) {
	        this.link.addEventListener('blur', this.close, false);
	      }
	    }

	    if (this.options.dismiss) {
	      document.addEventListener('click', this.dismiss, false);
	    }

	    if (!(isIE && isIE < 9)) {
	      // dismiss on window resize
	      window.addEventListener('resize', this.close, false);
	    }
	  };

	  (function () {
	    // POPOVER DATA API
	    // =================
	    var Popovers = document.querySelectorAll('[data-toggle=popover]'),
	        i = 0,
	        ppl = Popovers.length;
	    for (i; i < ppl; i++) {
	      var item = Popovers[i],
	          options = {};
	      options.trigger = item.getAttribute('data-trigger'); // click / hover / focus
	      options.animation = item.getAttribute('data-animation'); // true / false
	      options.duration = item.getAttribute('data-duration');
	      options.placement = item.getAttribute('data-placement');
	      options.dismiss = item.getAttribute('data-dismiss');
	      options.delay = item.getAttribute('data-delay');
	      new Popover(item, options);
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | ScrollSpy
	  // by dnp_theme

	  //SCROLLSPY DEFINITION
	  var ScrollSpy = function (element, item, options) {
	    options = options || {};

	    //this is the container element we spy it's elements on
	    this.element = typeof element === 'object' ? element : document.querySelector(element);

	    this.options = {};
	    // this is the UL menu component our scrollSpy object will target, configure and required by the container element
	    this.options.target = options.target ? typeof options.target === 'object' ? options.target : document.querySelector(options.target) : null;

	    //we need to determine the index of each menu item
	    this.items = this.options.target && this.options.target.getElementsByTagName('A');

	    this.item = item;
	    // the parent LI element
	    this.parent = this.item.parentNode;

	    // the upper level LI ^ UL ^ LI, this is required for dropdown menus
	    this.parentParent = this.parent.parentNode.parentNode;

	    this.tg = this.item.href && document.getElementById(this.item.getAttribute('href').replace('#', ''));
	    this.active = false;
	    this.topEdge = 0;
	    this.bottomEdge = 0;
	    var self = this;

	    //determine which is the real scrollTarget
	    if (this.element.offsetHeight < this.element.scrollHeight) {
	      // or this.scrollHeight()
	      this.scrollTarget = this.element;
	    } else {
	      this.scrollTarget = window;
	    }

	    if (!this.options.target) {
	      return;
	    }

	    this.topLimit = function () {
	      // the target offset
	      if (this.scrollTarget === window) {
	        return this.tg.getBoundingClientRect().top + this.scrollOffset() - 5;
	      } else {
	        return this.tg.offsetTop;
	      }
	    };
	    this.bottomLimit = function () {
	      return this.topLimit() + this.tg.clientHeight;
	    };
	    this.checkEdges = function () {
	      this.topEdge = this.topLimit();
	      this.bottomEdge = this.bottomLimit();
	    };
	    this.scrollOffset = function () {
	      if (this.scrollTarget === window) {
	        return window.pageYOffset || document.documentElement.scrollTop;
	      } else {
	        return this.element.scrollTop;
	      }
	    };
	    this.activate = function () {
	      if (this.parent && this.parent.tagName === 'LI' && !/\bactive/.test(this.parent.className)) {
	        addClass(this.parent, 'active');
	        if (this.parentParent && this.parentParent.tagName === 'LI' // activate the dropdown as well
	        && /\bdropdown/.test(this.parentParent.className) && !/\bactive/.test(this.parentParent.className)) {
	          addClass(this.parentParent, 'active');
	        }
	        this.active = true;
	      }
	    };
	    this.deactivate = function () {
	      if (this.parent && this.parent.tagName === 'LI' && /\bactive/.test(this.parent.className)) {
	        removeClass(this.parent, 'active');
	        if (this.parentParent && this.parentParent.tagName === 'LI' // deactivate the dropdown as well
	        && /\bdropdown/.test(this.parentParent.className) && /\bactive/.test(this.parentParent.className)) {
	          removeClass(this.parentParent, 'active');
	        }
	        this.active = false;
	      }
	    };
	    this.toggle = function () {
	      if (this.active === false && this.bottomEdge > this.scrollOffset() && this.scrollOffset() >= this.topEdge) {
	        //regular use, scroll just entered the element's topLimit or bottomLimit
	        this.activate();
	      } else if (this.active === true && this.bottomEdge <= this.scrollOffset() && this.scrollOffset() < this.topEdge) {
	        this.deactivate();
	      }
	    };
	    this.refresh = function () {
	      // check edges again
	      this.deactivate();
	      this.checkEdges();

	      this.toggle(); // If any case update values again
	    };
	    this.scrollEvent = function () {
	      function onSpyScroll() {
	        self.refresh();
	      }
	      this.scrollTarget.addEventListener('scroll', onSpyScroll, false);
	    };
	    this.resizeEvent = function () {
	      function onSpyResize() {
	        self.refresh();
	      }
	      window.addEventListener('resize', onSpyResize, false);
	    };
	    this.scrollHeight = function () {
	      if (this.scrollTarget === window) {
	        return Math.max(document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, document.documentElement.offsetHeight);
	      } else {
	        return this.element.scrollHeight;
	      }
	    };

	    // init
	    if (this.item.getAttribute('href') && this.item.getAttribute('href').indexOf('#') > -1) {
	      //actions
	      this.checkEdges();
	      this.refresh();
	      this.scrollEvent();
	      if (!(isIE && isIE < 9)) {
	        this.resizeEvent();
	      }
	    }
	  };

	  (function () {
	    //SCROLLSPY DATA API
	    //=============
	    var scrollSpyes = document.querySelectorAll('[data-spy="scroll"]'),
	        i = 0,
	        ssl = scrollSpyes.length; // mostly is the document.body or a large container with many elements having id="not-null-id"
	    for (i; i < ssl; i++) {
	      var spy = scrollSpyes[i],
	          options = {};
	      options.target = spy.getAttribute('data-target') || null; // this must be a .nav component with id="not-null"
	      if (options.target !== null) {
	        var menu = options.target === 'object' ? options.target : document.querySelector(options.target),
	            items = menu.querySelectorAll('a'),
	            j = 0,
	            il = items.length;
	        for (j; j < il; j++) {
	          var item = items[j];
	          if (item.href && item.getAttribute('href') !== '#') new ScrollSpy(spy, item, options);
	        }
	      }
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Tab
	  // by dnp_theme

	  // TAB DEFINITION
	  // ===================
	  var Tab = function (element, options) {
	    options = options || {};
	    this.tab = typeof element === 'object' ? element : document.querySelector(element);
	    this.tabs = this.tab.parentNode.parentNode;
	    this.dropdown = this.tabs.querySelector('.dropdown');
	    if (/\bdropdown-menu/.test(this.tabs.className)) {
	      this.dropdown = this.tabs.parentNode;
	      this.tabs = this.tabs.parentNode.parentNode;
	    }
	    this.options = options;

	    // default tab transition duration
	    this.duration = 150;
	    this.options.duration = isIE && isIE < 10 ? 0 : options.duration || this.duration;

	    var self = this;

	    this.handle = function (e) {
	      e = e || window.e;e.preventDefault();
	      var next = e.target; //the tab we clicked is now the next tab
	      var nextContent = document.getElementById(next.getAttribute('href').replace('#', '')); //this is the actual object, the next tab content to activate

	      // get current active tab and content
	      var activeTab = self.getActiveTab();
	      var activeContent = self.getActiveContent();

	      if (!/\bactive/.test(next.parentNode.className)) {
	        // toggle "active" class name
	        removeClass(activeTab, 'active');
	        addClass(next.parentNode, 'active');

	        // handle dropdown menu "active" class name
	        if (self.dropdown) {
	          if (!/\bdropdown-menu/.test(self.tab.parentNode.parentNode.className)) {
	            if (/\bactive/.test(self.dropdown.className)) removeClass(self.dropdown, 'active');
	          } else {
	            if (!/\bactive/.test(self.dropdown.className)) addClass(self.dropdown, 'active');
	          }
	        }

	        //1. hide current active content first
	        removeClass(activeContent, 'in');

	        setTimeout(function () {
	          //2. toggle current active content from view
	          removeClass(activeContent, 'active');
	          addClass(nextContent, 'active');
	        }, self.options.duration);
	        setTimeout(function () {
	          //3. show next active content
	          addClass(nextContent, 'in');
	        }, self.options.duration * 2);
	      }
	    };
	    this.getActiveTab = function () {
	      var activeTabs = this.tabs.querySelectorAll('.active');
	      if (activeTabs.length === 1 && !/\bdropdown/.test(activeTabs[0].className)) {
	        return activeTabs[0];
	      } else if (activeTabs.length > 1) {
	        return activeTabs[activeTabs.length - 1];
	      }
	    };
	    this.getActiveContent = function () {
	      var a = this.getActiveTab().getElementsByTagName('A')[0].getAttribute('href').replace('#', '');
	      return a && document.getElementById(a);
	    };

	    // init
	    this.tab.addEventListener('click', this.handle, false);
	  };

	  (function () {
	    // TAB DATA API
	    // =================
	    var Tabs = document.querySelectorAll("[data-toggle='tab'], [data-toggle='pill']"),
	        tbl = Tabs.length,
	        i = 0;
	    for (i; i < tbl; i++) {
	      var tab = Tabs[i],
	          options = {};
	      options.duration = tab.getAttribute('data-duration') && tab.getAttribute('data-duration') || false;
	      new Tab(tab, options);
	    }
	  })();
	  // Native Javascript for Bootstrap 3 | Tooltip
	  // by dnp_theme

	  // TOOLTIP DEFINITION
	  // ===================
	  var Tooltip = function (element, options) {
	    options = options || {};

	    this.link = typeof element === 'object' ? element : document.querySelector(element);
	    this.title = this.link.getAttribute('title') || this.link.getAttribute('data-original-title');
	    this.tooltip = null;
	    this.options = {};
	    this.options.animation = options.animation && options.animation !== 'fade' ? options.animation : 'fade';
	    this.options.placement = options.placement ? options.placement : 'top';
	    this.options.delay = parseInt(options.delay) || 100;
	    this.duration = 150;
	    this.options.duration = isIE && isIE < 10 ? 0 : options.duration || this.duration;
	    this.options.container = options.container || document.body;
	    if (!this.title) return;
	    this.timer = 0; // the link own event timer

	    var self = this,
	        events = 'onmouseleave' in this.link ? ['mouseenter', 'mouseleave'] : ['mouseover', 'mouseout'];

	    this.open = function (e) {
	      clearTimeout(self.link.getAttribute('data-timer'));
	      self.timer = setTimeout(function () {
	        if (self.tooltip === null) {
	          self.createToolTip();
	          self.styleTooltip();
	          self.updateTooltip();
	        }
	      }, self.options.duration);
	      self.link.setAttribute('data-timer', self.timer);
	    };
	    this.close = function (e) {
	      clearTimeout(self.link.getAttribute('data-timer'));
	      self.timer = setTimeout(function () {
	        if (self.tooltip && self.tooltip !== null) {
	          self.tooltip.className = self.tooltip.className.replace(' in', '');
	          setTimeout(function () {
	            self.removeToolTip(); // for performance/testing reasons we can keep the tooltips if we want
	          }, self.options.duration);
	        }
	      }, self.options.delay + self.options.duration);
	      self.link.setAttribute('data-timer', self.timer);
	    };
	    //remove the tooltip
	    this.removeToolTip = function () {
	      this.tooltip && this.options.container.removeChild(this.tooltip);
	      this.tooltip = null;
	    };
	    //create the tooltip structure
	    this.createToolTip = function () {
	      this.tooltip = document.createElement('div');
	      this.tooltip.setAttribute('role', 'tooltip');

	      var tooltipArrow = document.createElement('div');
	      tooltipArrow.setAttribute('class', 'tooltip-arrow');
	      var tooltipInner = document.createElement('div');
	      tooltipInner.setAttribute('class', 'tooltip-inner');

	      this.tooltip.appendChild(tooltipArrow);
	      this.tooltip.appendChild(tooltipInner);

	      //set tooltip content
	      tooltipInner.innerHTML = this.title;

	      //append to the container
	      this.options.container.appendChild(this.tooltip);
	    };
	    this.styleTooltip = function (pos) {
	      var rect = this.link.getBoundingClientRect(),
	          placement = pos || this.options.placement;

	      this.tooltip.setAttribute('class', 'tooltip ' + placement + ' ' + this.options.animation);

	      var ld = { w: rect.right - rect.left, h: rect.bottom - rect.top },
	          //link real dimensions
	      td = { w: this.tooltip.offsetWidth, h: this.tooltip.offsetHeight },
	          //tooltip real dimensions
	      sYo = this.getScroll().y,
	          sXo = this.getScroll().x; //window vertical and horizontal scroll

	      //apply styling
	      if (/top/.test(placement)) {
	        //TOP
	        this.tooltip.style.top = rect.top + sYo - td.h + 'px';
	        this.tooltip.style.left = rect.left + sXo - td.w / 2 + ld.w / 2 + 'px';
	      } else if (/bottom/.test(placement)) {
	        //BOTTOM
	        this.tooltip.style.top = rect.top + sYo + ld.h + 'px';
	        this.tooltip.style.left = rect.left + sXo - td.w / 2 + ld.w / 2 + 'px';
	      } else if (/left/.test(placement)) {
	        //LEFT
	        this.tooltip.style.top = rect.top + sYo - td.h / 2 + ld.h / 2 + 'px';
	        this.tooltip.style.left = rect.left + sXo - td.w + 'px';
	      } else if (/right/.test(placement)) {
	        //RIGHT
	        this.tooltip.style.top = rect.top + sYo - td.h / 2 + ld.h / 2 + 'px';
	        this.tooltip.style.left = rect.left + sXo + ld.w + 'px';
	      }
	    };
	    this.updateTooltip = function () {
	      var placement = null;
	      if (!isElementInViewport(this.tooltip)) {
	        placement = this.updatePlacement();
	      } else {
	        placement = this.options.placement;
	      }
	      this.styleTooltip(placement);
	      this.tooltip.className += ' in';
	    };
	    this.updatePlacement = function () {
	      var pos = this.options.placement;
	      if (/top/.test(pos)) {
	        //TOP
	        return 'bottom';
	      } else if (/bottom/.test(pos)) {
	        //BOTTOM
	        return 'top';
	      } else if (/left/.test(pos)) {
	        //LEFT
	        return 'right';
	      } else if (/right/.test(pos)) {
	        //RIGHT
	        return 'left';
	      }
	    };
	    this.getScroll = function () {
	      return {
	        y: window.pageYOffset || document.documentElement.scrollTop,
	        x: window.pageXOffset || document.documentElement.scrollLeft
	      };
	    };
	    // init
	    this.link.addEventListener(events[0], this.open, false);
	    this.link.addEventListener(events[1], this.close, false);
	    //remove title from link
	    this.link.setAttribute('data-original-title', this.title);
	    this.link.removeAttribute('title');
	  };

	  (function () {
	    // TOOLTIP DATA API
	    // =================
	    var Tooltips = document.querySelectorAll('[data-toggle=tooltip]'),
	        i = 0,
	        tpl = Tooltips.length;
	    for (i; i < tpl; i++) {
	      var item = Tooltips[i],
	          options = {};
	      options.animation = item.getAttribute('data-animation');
	      options.placement = item.getAttribute('data-placement');
	      options.duration = item.getAttribute('data-duration');
	      options.delay = item.getAttribute('data-delay');
	      new Tooltip(item, options);
	    }
	  })();

	  return {
	    Affix: Affix,
	    Alert: Alert,
	    Button: Button,
	    Carousel: Carousel,
	    Collapse: Collapse,
	    Dropdown: Dropdown,
	    Modal: Modal,
	    Popover: Popover,
	    ScrollSpy: ScrollSpy,
	    Tab: Tab,
	    Tooltip: Tooltip
	  };
	});
	});

	// Show the tooltip on the hovered over circle
	function showTooltip(d, i, options, popoverTooltip) {
	  // test the bootstrap.native import
	  // console.log('bsn', bsn);
	  var Popover = bootstrapNative.Popover;

	  var idVariable = options.idVariable;
	  var xVariable = options.xVariable;
	  var yVariable = options.yVariable;
	  var xSelector = options.xSelector;
	  var ySelector = options.ySelector;
	  var tip = options.tip;
	  var wrapper = options.wrapper;
	  var height = options.height;
	  var width = options.width;
	  var tooltipVariables = options.tooltipVariables;
	  var xDroplineTextFormat = options.xDroplineTextFormat;
	  var yDroplineTextFormat = options.yDroplineTextFormat;
	  // Save the circle element (so not the voronoi which is triggering the hover event)
	  // in a variable by using the unique class of the voronoi (idVariable)
	  var elementSelector = void 0;
	  if (typeof d.datum !== 'undefined' && typeof d.datum[idVariable] !== 'undefined') {
	    elementSelector = '.marks.id' + xSelector + ySelector + d.datum[idVariable];
	  } else {
	    elementSelector = '.marks.id' + xSelector + ySelector + d[idVariable];
	  }
	  console.log('elementSelector from showTooltip', elementSelector);

	  var element = selectAll(elementSelector);

	  var el = element._groups[0];

	  function generateHTML() {
	    // console.log('d from tooltip html function', d);
	    var allRows = '';
	    tooltipVariables.forEach(function (e) {
	      var currentValue = void 0;
	      var f = void 0;
	      if (typeof d.datum !== 'undefined') {
	        f = d.datum;
	      } else {
	        f = d;
	      }
	      // now parse based on the format
	      if (typeof e.format !== 'undefined') {
	        if (e.type === 'time') {
	          // time formatting
	          var inputValue = new Date(Number(f[e.name]));
	          // TODO: handle case where date values are strings
	          var currentFormat = timeFormat(e.format);
	          currentValue = currentFormat(inputValue);
	        } else {
	          // number formatting
	          var _inputValue = Number(f[e.name]);
	          var _currentFormat = format(e.format);
	          currentValue = _currentFormat(_inputValue);
	        }
	      } else {
	        // no formatting
	        currentValue = f[e.name];
	      }
	      var currentRow = '<span style=\'font-size: 11px; display: block; text-align: center;\'>' + e.name + ' ' + currentValue + '</span>';
	      allRows = allRows.concat(currentRow);
	    });
	    var html = '<div class="popover" role="tooltip">\n          <div class="arrow"></div>\n          <div class="popover-content">' + allRows + '</div>\n        </div>';
	    // console.log('html from template', html);
	    return html;
	  };

	  // close any lingering tooltips from
	  // previous interactions
	  selectAll('.popover').remove();

	  //Fade out guide lines, then remove them
	  selectAll('.guide').transition().duration(200).style('opacity', 0).remove();

	  //Define and show the tooltip
	  popoverTooltip = new Popover(elementSelector, {
	    trigger: 'hover',
	    duration: 100,
	    delay: 100,
	    template: generateHTML()
	  });

	  // console.log('popoverTooltip', popoverTooltip);
	  popoverTooltip.open();

	  //Make chosen circle more visible
	  element.style("opacity", 1);

	  //Place and show tooltip
	  var x = +element.attr("cx");
	  var y = +element.attr("cy");
	  var color = element.style("fill");

	  //
	  //Append lines to bubbles that will be used to show the precise data points
	  //

	  //vertical line to x-axis
	  wrapper.append("line").attr("class", "guide").attr("x1", x).attr("x2", x).attr("y1", y).attr("y2", height + 20).style("stroke", color).style("opacity", 0).transition().duration(200).style("opacity", 0.5);
	  //Value on the axis
	  wrapper.append("text").attr("class", "guide").attr("x", x).attr("y", height + 38).style("fill", color).style("opacity", 0).style("text-anchor", "middle").text(format(xDroplineTextFormat)(d[xVariable])).transition().duration(200).style("opacity", 0.5);

	  //horizontal line to y-axis
	  wrapper.append("line").attr("class", "guide").attr("x1", x).attr("x2", -20).attr("y1", y).attr("y2", y).style("stroke", color).style("opacity", 0).transition().duration(200).style("opacity", 0.5);
	  //Value on the axis
	  wrapper.append("text").attr("class", "guide").attr("x", -25).attr("y", y).attr("dy", "0.35em").style("fill", color).style("opacity", 0).style("text-anchor", "end").text(format(yDroplineTextFormat)(d[yVariable])).transition().duration(200).style("opacity", 0.5);

	  return popoverTooltip;
	} // function showTooltip

	//Hide the tooltip when the mouse moves away
	function removeTooltip(d, i, options, popoverTooltip) {
	  var idVariable = options.idVariable;
	  var xSelector = options.xSelector;
	  var ySelector = options.ySelector;
	  var tip = options.tip;
	  var wrapper = options.wrapper;
	  var height = options.height;
	  var width = options.width;
	  // Save the circle element (so not the voronoi which is triggering the hover event)
	  // in a variable by using the unique class of the voronoi (idVariable)
	  var elementSelector = void 0;
	  if (typeof d.datum !== 'undefined' && typeof d.datum[idVariable] !== 'undefined') {
	    elementSelector = '.marks.id' + xSelector + ySelector + d.datum[idVariable];
	  } else {
	    elementSelector = '.marks.id' + xSelector + ySelector + d[idVariable];
	  }

	  var element = void 0;
	  if (typeof d.datum !== 'undefined' && typeof d.datum[idVariable] !== 'undefined') {
	    element = selectAll('.marks.id' + xSelector + ySelector + d.datum[idVariable]);
	  } else {
	    element = selectAll('.marks.id' + xSelector + ySelector + d[idVariable]);
	  }

	  // Fade out the bright circle again
	  element.style('fill-opacity', 0.3);

	  //Hide tooltip
	  if (typeof popoverTooltip !== 'undefined') {
	    popoverTooltip.close();
	  }

	  //Fade out guide lines, then remove them
	  selectAll(".guide").transition().duration(200).style("opacity", 0).remove();
	} //function removeTooltip

	function drawVoronoiScatterplot(selector, inputData, options) {
	  //
	  // Set-up
	  //
	  console.log('d3', d3);

	  // vanilla JS window width and height
	  var wV = window;
	  var dV = document;
	  var eV = dV.documentElement;
	  var gV = dV.getElementsByTagName('body')[0];
	  var xV = wV.innerWidth || eV.clientWidth || gV.clientWidth;
	  var yV = wV.innerHeight || eV.clientHeight || gV.clientHeight;

	  // Quick fix for resizing some things for mobile-ish viewers
	  var mobileScreen = xV < 500;

	  // set default configuration
	  var cfg = {
	    margin: { left: 120, top: 20, right: 80, bottom: 40 },
	    width: 1000,
	    height: 250,
	    animateFromXAxis: undefined,
	    hideXLabel: undefined,
	    yVariable: 'y',
	    yExponent: 0.5,
	    xDroplineTextFormat: ".0f",
	    yDroplineTextFormat: ".0f",
	    idVariable: undefined,
	    voronoiStroke: 'none',
	    maxDistanceFromPoint: 50,
	    marks: {
	      r: 2,
	      fillOpacity: 0.3
	    }
	  };

	  // Put all of the options into a variable called cfg
	  if (typeof options !== 'undefined') {
	    for (var i in options) {
	      if (typeof options[i] !== 'undefined') {
	        cfg[i] = options[i];
	      }
	    } // for i
	  } // if
	  // console.log('options passed in to scatterplot', options);
	  // console.log('cfg from scatterplot', cfg);

	  // map variables to our dataset
	  var xVariable = cfg.xVariable;
	  var yVariable = cfg.yVariable;
	  var rVariable = undefined;
	  var idVariable = cfg.idVariable;
	  var groupByVariable = cfg.groupByVariable;
	  var wrapperId = cfg.wrapperId;
	  var wrapperLabel = cfg.wrapperLabel;
	  var tooltipVariables = cfg.tooltipColumns;
	  var numericVariables = cfg.numericColumns;
	  var xLabelDetail = cfg.xLabelDetail;
	  var hideXLabel = cfg.hideXLabel;
	  var xLabelTransform = cfg.xLabelTransform;
	  var yLabelTransform = cfg.yLabelTransform;
	  var dependent = cfg.dependent;
	  var globalExtents = cfg.globalExtents;
	  var animateFromXAxis = cfg.animateFromXAxis;
	  var opacityCircles = cfg.marks.fillOpacity;
	  var marksRadius = cfg.marks.r;
	  var dynamicWidth = cfg.dynamicWidth;
	  var voronoiStroke = cfg.voronoiStroke;
	  var yScaleType = cfg.yScaleType;
	  var yScaleExponent = cfg.yScaleExponent;
	  var xDroplineTextFormat = cfg.xDroplineTextFormat;
	  var yDroplineTextFormat = cfg.yDroplineTextFormat;
	  var maxDistanceFromPoint = cfg.maxDistanceFromPoint;

	  // strip out the white space
	  var xSelector = xVariable.replace(/\s/g, '');
	  var ySelector = yVariable.replace(/\s/g, '');

	  // labels
	  var xLabel = cfg.xLabel || xVariable;
	  if (typeof xLabelDetail !== 'undefined') {
	    xLabel = xLabel + ' (' + xLabelDetail + ')';
	  }
	  var yLabel = cfg.yLabel || yVariable;;
	  // const xLabel = 'y\u{0302}'; // y-hat for the prediction
	  // const yLabel = 'r\u{0302}'; // r-hat for the residual

	  var div = select(selector).append('div').attr('id', 'chart');

	  // Scatterplot
	  var margin = cfg.margin;
	  var chartWidth = document.getElementById('chart').offsetWidth;
	  var height = cfg.height;
	  // const maxDistanceFromPoint = 50;

	  var width = void 0;
	  if (typeof dynamicWidth !== 'undefined') {
	    // use a dynamic width derived from the window width
	    width = chartWidth - margin.left - margin.right;
	  } else {
	    // use width specified in the options passed in
	    width = cfg.width - margin.left - margin.right;
	  }

	  var svg = div.append('svg').attr('width', width + margin.left + margin.right).attr('height', height + margin.top + margin.bottom);

	  var wrapper = svg.append('g').classed('chartWrapper', true).classed('' + xSelector, true).attr('transform', 'translate(' + margin.left + ', ' + margin.top + ')');

	  if (typeof dependent !== 'undefined') {
	    svg.classed('dependent', true);
	    wrapper.classed('dependent', true);
	    wrapper.attr('id', wrapperId);

	    // draw model label
	    wrapper.append('g').attr('transform', 'translate(' + 20 + ', ' + 45 + ')').append('text').classed('modelLabel', true).style('font-size', '40px').style('font-weight', 400).style('opacity', 0.15).style('fill', 'gray').style('font-family', 'Work Sans, sans-serif').text('' + wrapperLabel);
	  } else {
	    svg.classed('independent', true);
	    wrapper.classed('independent', true);
	    wrapper.attr('id', wrapperId);
	  }

	  //
	  // Initialize Axes & Scales
	  //

	  // Set the color for each region
	  var color = ordinal().range(['#1f78b4', '#ff7f00', '#33a02c', '#e31a1c', '#6a3d9a', '#b15928', '#a6cee3', '#fdbf6f', '#b2df8a', '#fb9a99', '#cab2d6', '#ffff99']);

	  // parse strings to numbers
	  var data = _.cloneDeep(inputData);
	  // console.log('data from scatterplot', data);

	  data.forEach(function (d, i) {
	    numericVariables.forEach(function (e) {
	      d[e] = Number(d[e]);
	    });

	    if (typeof idVariable === 'undefined') {
	      data[i].id = '' + i;
	    }
	  });

	  // check to see if all points to be plotted are unique
	  var pointsData = data.map(function (d) {
	    return {
	      x: d[xVariable],
	      y: d[yVariable]
	    };
	  });
	  var uniquePoints = _.uniqWith(pointsData, _.isEqual);
	  var uniquePointsLength = uniquePoints.length;
	  var dataLength = data.length;
	  console.log('uniquePointsLength', uniquePointsLength);
	  console.log('dataLength', dataLength);
	  console.log('all points unique?', uniquePointsLength === dataLength);

	  if (typeof idVariable === 'undefined') idVariable = 'id';
	  // console.log('data from drawVoronoiScatterplot', data);

	  //
	  // Scales
	  //

	  // Set the new x axis range
	  var xScale = linear$2().range([0, width]);

	  // Set the new y axis range
	  var yScale = void 0;

	  switch (yScaleType) {
	    case 'power':
	      yScale = pow().range([height, 0]).exponent(yScaleExponent);
	      break;
	    default:
	      yScale = linear$2().range([height, 0]);
	  }

	  if (typeof globalExtents !== 'undefined') {
	    // retrieve global extents
	    var xExtent = globalExtents[0];
	    var yExtent = globalExtents[1];

	    // set scale domains with global extents
	    xScale.domain(xExtent);
	    yScale.domain(yExtent).nice();
	  } else {
	    // set scale domains from the local extent
	    xScale.domain(extent(data, function (d) {
	      return d[xVariable];
	    }));
	    // .nice();
	    yScale.domain(extent(data, function (d) {
	      return d[yVariable];
	    })).nice();
	  }
	  // console.log('yScale.domain()', yScale.domain());

	  //
	  // Axes
	  //

	  // Set new x-axis
	  var xAxis = axisBottom().ticks(4).tickSizeOuter(0)
	  // .tickFormat(d => // Difficult function to create better ticks
	  //   xScale.tickFormat((mobileScreen ? 4 : 8), e => {
	  //     const prefix = d3.format(',.0s');
	  //     return `${prefix(e)}`;
	  //   })(d))
	  .scale(xScale);

	  // calculate y-position we'd like for the x-axis
	  var xAxisYTranslate = max([0, yScale.domain()[0]]);

	  // Append the x-axis
	  wrapper.append('g').attr('class', 'x axis').attr('transform', 'translate(' + 0 + ', ' + yScale(xAxisYTranslate) + ')').call(xAxis);

	  var yAxis = axisLeft().ticks(6) // Set rough # of ticks
	  .scale(yScale);

	  // Append the y-axis
	  wrapper.append('g').attr('class', 'y axis').attr('transform', 'translate(' + 0 + ', ' + 0 + ')').call(yAxis);

	  // Scale for the bubble size
	  if (typeof rVariable !== 'undefined') {
	    var _rScale = sqrt().range([mobileScreen ? 1 : 2, mobileScreen ? 10 : 16]).domain(extent(data, function (d) {
	      return d[rVariable];
	    }));
	  }

	  //
	  // Scatterplot Circles
	  //

	  // Initiate a group element for the circles
	  var circleGroup = wrapper.append('g').attr('class', 'circleWrapper');

	  function update(data, options) {
	    console.log('update function was called');
	    // console.log('data from update function', data);

	    // handle NaN values
	    data = data.filter(function (d) {
	      return !Number.isNaN(d[xVariable]) && !Number.isNaN(d[yVariable]);
	    });

	    // an extra delay to allow large 
	    // amounts of points time to render
	    var marksDelay = 0;
	    if (typeof options !== 'undefined') {
	      marksDelay = options.marksDelay;

	      // if a new groupByVariable is passed in, use it
	      if (typeof options.groupByVariable !== 'undefined') {
	        groupByVariable = options.groupByVariable;
	      };
	    }

	    // Place the circles
	    var updateSelection = circleGroup.selectAll('circle') // circleGroup.selectAll('.marks')
	    .data(function () {
	      if (typeof rVariable !== 'undefined') {
	        // Sort so the biggest circles are below
	        return data.sort(function (a, b) {
	          return b[rVariable] > a[rVariable];
	        });
	      }
	      return data;
	    }, function (d) {
	      return d[idVariable];
	    });
	    // console.log('updateSelection', updateSelection);

	    var enterSelection = updateSelection.enter().append('circle');
	    // console.log('enterSelection', enterSelection);

	    var exitSelection = updateSelection.exit();
	    // console.log('exitSelection', exitSelection);

	    updateSelection;
	    // .style('fill', 'black');

	    enterSelection.attr('class', function (d) {
	      return 'marks id' + xSelector + ySelector + d[idVariable];
	    }).style('fill-opacity', 0).style('fill', function (d) {
	      // console.log('d from style', d);
	      if (typeof groupByVariable !== 'undefined') {
	        return color(d[groupByVariable]);
	      }
	      return color.range()[0]; // 'green'
	    }).attr('cx', function (d) {
	      // console.log('cx parameters from drawVoronoiScatterplot');
	      // console.log('xScale', xScale);
	      // console.log('d', d);
	      // console.log('xVariable', xVariable);
	      // console.log('xScale(d[xVariable])', xScale(d[xVariable]));
	      return xScale(d[xVariable]);
	    }).attr('cy', function (d) {
	      if (typeof animateFromXAxis !== 'undefined') {
	        return yScale(xAxisYTranslate);
	      } else {
	        return yScale(d[yVariable]);
	      }
	    }).attr('r', function (d) {
	      if (typeof rVariable !== 'undefined') {
	        return rScale(d[rVariable]);
	      }
	      return marksRadius;
	    }).transition().delay(marksDelay).duration(2000).style('fill-opacity', opacityCircles).attr('data-content', 'some data content').attr('data-toggle', 'popover');
	    // .append('title')
	    //   .text(d => `${d[idVariable]} ${d[xLabelDetail]}`);

	    exitSelection.transition().delay(marksDelay).duration(0).style('fill', 'lightgray') // 'red'
	    .transition().delay(2000).duration(2000).style('fill-opacity', 0).remove();

	    var mergedSelection = updateSelection.merge(enterSelection);
	    // console.log('mergedSelection', mergedSelection);
	    // console.log('mergedSelection.nodes()', mergedSelection.nodes());
	    var mergedSelectionData = mergedSelection.nodes().map(function (d) {
	      return d.__data__;
	    });
	    // console.log('mergedSelectionData', mergedSelectionData);

	    if (typeof animateFromXAxis !== 'undefined') {
	      updateSelection.transition().delay(2000).duration(2000).attr('cy', function (d) {
	        return yScale(d[yVariable]);
	      });
	    }

	    ////////////////////////////////////////////////////////////  
	    ///// Capture mouse events and voronoi.find() the site /////
	    ////////////////////////////////////////////////////////////

	    // initialize variable for popover tooltip
	    var popoverTooltip = void 0;

	    // Use the same variables of the data in the .x and .y as used in the cx and cy of the circle call
	    svg._tooltipped = svg._voronoi = null;
	    svg.on('mousemove', function () {
	      if (!svg._voronoi) {
	        console.log('computing the voronoi…');
	        svg._voronoi = voronoi().x(function (d) {
	          return xScale(d[xVariable]);
	        }).y(function (d) {
	          return yScale(d[yVariable]);
	        })(data);
	        console.log('svg._voronoi', svg._voronoi);
	        console.log('…done.');
	      }
	      var p = mouse(this),
	          site;
	      p[0] -= margin.left;
	      p[1] -= margin.top;
	      // don't react if the mouse is close to one of the axis
	      if (p[0] < 5 || p[1] < 5) {
	        site = null;
	      } else {
	        site = svg._voronoi.find(p[0], p[1], maxDistanceFromPoint);
	      }
	      if (site !== svg._tooltipped) {
	        if (svg._tooltipped) {
	          var removeTooltipOptions = {
	            idVariable: idVariable,
	            xVariable: xVariable,
	            yVariable: yVariable,
	            xSelector: xSelector,
	            ySelector: ySelector,
	            wrapper: wrapper,
	            height: height,
	            width: width
	          };
	          removeTooltip(svg._tooltipped.data, undefined, removeTooltipOptions, popoverTooltip);
	        }

	        if (site) {
	          var showTooltipOptions = {
	            idVariable: idVariable,
	            xVariable: xVariable,
	            yVariable: yVariable,
	            xSelector: xSelector,
	            ySelector: ySelector,
	            wrapper: wrapper,
	            height: height,
	            width: width,
	            tooltipVariables: tooltipVariables,
	            xDroplineTextFormat: xDroplineTextFormat,
	            yDroplineTextFormat: yDroplineTextFormat
	          };
	          // return the updated popoverTooltip
	          popoverTooltip = showTooltip(site.data, undefined, showTooltipOptions, popoverTooltip);
	        }
	        svg._tooltipped = site;
	      }
	    });
	  }

	  // call the update function once to kick things off
	  update(data);

	  //
	  // Initialize Labels
	  //

	  var xlabelText = xLabel || xVariable;
	  var yLabelText = yLabel || yVariable;

	  if (typeof hideXLabel === 'undefined') {
	    // Set up X axis label
	    var xTextAnchor = 'start';
	    var xLabelTranslate = void 0;
	    if (xLabelTransform === 'top') {
	      // label on top
	      xLabelTranslate = 'translate(' + 30 + ',' + -10 + ')';
	    } else if (typeof xLabelTransform !== 'undefined') {
	      // use specified [x, y, rotate] transform
	      xLabelTranslate = 'rotate(' + yLabelTransform[2] + ') translate(' + xLabelTransform[0] + ',' + xLabelTransform[1] + ')';
	    } else {
	      // default to no translation
	      xLabelTranslate = 'translate(' + width + ',' + (height - 10) + ')';
	      xTextAnchor = 'end';
	    }

	    wrapper.append('g').append('text').attr('class', 'x title').attr('text-anchor', xTextAnchor).style('font-size', (mobileScreen ? 8 : 12) + 'px').style('font-weight', 600).attr('transform', xLabelTranslate).text('' + xlabelText);
	  }

	  // Set up y axis label
	  var yLabelTranslate = void 0;
	  if (yLabelTransform === 'left') {
	    // label on the left
	    yLabelTranslate = 'translate(' + -(margin.left / 4) + ',' + yScale(xAxisYTranslate) + ')';
	  } else if (typeof yLabelTransform !== 'undefined') {
	    // use specified [x, y, rotate] transform
	    yLabelTranslate = 'rotate(' + yLabelTransform[2] + ') translate(' + yLabelTransform[0] + ',' + yLabelTransform[1] + ')';
	  } else {
	    // default
	    yLabelTranslate = 'rotate(270) translate(' + 0 + ',' + 10 + ')';
	  }

	  wrapper.append('g').append('text').attr('class', 'y title').attr('text-anchor', 'end').attr('dy', '0.35em').style('font-size', (mobileScreen ? 8 : 12) + 'px').style('font-weight', 600)
	  // .attr('transform', 'translate(18, 0) rotate(-90)')
	  .attr('transform', yLabelTranslate).text('' + yLabelText);

	  //
	  // Hide axes on click
	  //
	  var axisVisible = true;

	  function click() {
	    if (axisVisible) {
	      selectAll('.y.axis').style('opacity', 0);
	      selectAll('.x.axis text').style('opacity', 0);
	      selectAll('.x.axis .tick').style('opacity', 0);
	      axisVisible = false;
	    } else {
	      selectAll('.axis').style('opacity', 1);
	      selectAll('.x.axis text').style('opacity', 1);
	      selectAll('.x.axis .tick').style('opacity', 1);
	      axisVisible = true;
	    }
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	  selectAll('.chartWrapper').on('click', function () {
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	  //   if (typeof update === 'function') update(data);
	  // };

	}

	exports.drawVoronoiScatterplot = drawVoronoiScatterplot;

	Object.defineProperty(exports, '__esModule', { value: true });

}));

d3-voronoi.min.js

// https://d3js.org/d3-voronoi/ Version 1.0.2. Copyright 2016 Mike Bostock.
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index.html

<!DOCTYPE html>
<html>
<head>
<meta http-equiv='Content-Type' content='text/html;charset=utf-8'/>
<title>SC Polling Places</title>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.10.3/babel.min.js'></script>
<script src="https://d3js.org/d3-queue.v2.min.js"></script>
<script src="https://d3js.org/d3.v4.js"></script>
  <!-- D3-voronoi with .find(x,y) --> 
<script src="d3-voronoi.min.js"></script>
<script src='d3-voronoi-scatterplot.js'></script>
  <!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
<link href='http://fonts.googleapis.com/css?family=Open+Sans:700,400,300' rel='stylesheet' type='text/css'>
<link rel="icon" href="data:;base64,iVBORw0KGgo=">
<style>
	body {
	  font-family: 'Open Sans', sans-serif;
	  font-size: 12px;
	  font-weight: 400;
	  color: #525252;
	  text-align: center;
	}
	html, body { 
		width:auto; 
		height:auto; 
	}
	.axis path,
	.axis line {
		fill: none;
		stroke: #B3B3B3;
		shape-rendering: crispEdges;
	}
	.axis text {
		font-size: 10px;
		fill: #6B6B6B;
	}
</style>
</head>
<body>
	<div id='cont' class='container-fluid text-center'>
		<div class='row scatter'>
			<div>
				<div id='chart'></div>
      </div>
	</div>
<script lang='babel' type='text/babel'>
  var queue = d3_queue.queue();

  queue
    .defer(d3.json, "south-carolina-general-election-polling-locations-lon-lat.json")
    .await(ready);

	function ready(error, data) {
    // const subsets = {
    //   0: subset0,
    //   1: subset1,
    //   2: subset2,
    //   3: subset3
    // };

    const xVariable = 'lon';
    const yVariable = 'lat';

		const tooltipColumns = [
    	{
    	  name: 'location_name'
    	},
    	{
    	  name: 'city'
    	},
    	{
    	  name: 'zip'
    	},
      {
        name: 'id'
      }
  	];

  	const numericColumns = [
  		'lon',
  		'lat',
  	];

  	const marks = {
    	r: 2,
    	fillOpacity: 0.3,
    	colors: [
    	  '#1f78b4',
    	  '#ff7f00',
    	  '#33a02c',
    	  '#e31a1c',
    	  '#6a3d9a',
    	  '#b15928',
    	  '#a6cee3',
    	  '#fdbf6f',
    	  '#b2df8a',
    	  '#fb9a99',
    	  '#cab2d6',
    	  '#ffff99'
    	]
  	};

  	const categoricalColumns = [
  		'City'
  	];

		const options = {
      width: 960,
      height: 900,
      xVariable,
      yVariable,
      yScaleType: 'linear',
      // yScaleExponent: 3,
      idVariable: 'id',
      groupByVariable: undefined,
      tooltipColumns,
      numericColumns,
      // xLabelDetail: 'Country',
      wrapperId: 'sc_polling_places',
      // wrapperLabel: 'example 02',
      // dependent: true,
      // globalExtents,
      marks,
      categoricalColumns,
      xDroplineTextFormat: ',.0f'
    }

    console.log('d3VoronoiScatterplot', d3VoronoiScatterplot);
    const update = d3VoronoiScatterplot.drawVoronoiScatterplot('#chart', data, options);
    // console.log('update', update);

    // update(subset2);
    
    function getGlobalExtents(datasets, options) {
      // find max extent across all datasets
      const xVariable = options.xVariable;
      const yVariable = options.yVariable;
      const globalExtents = [
        [0, 0], // global xVariable Predict extent
        [0, 0]  // global yVariable Residual extent 
      ];
      Object.keys(datasets).forEach((key) => {
        const currentDataset = datasets[key];
        [xVariable, yVariable].forEach((variable, i) => {
          const currentExtent = d3.extent(currentDataset, d => Number(d[variable]));
          // update global min
          if (currentExtent[0] < globalExtents[i][0]) {
            globalExtents[i][0] = currentExtent[0];
          }
          // update the global max
          if (currentExtent[1] > globalExtents[i][1]) {
            globalExtents[i][1] = currentExtent[1];
          }
        })
      })
      return globalExtents;
    }
	}
</script>
</body>
</html>

preview.png

preview.xcf

south-carolina-general-election-polling-locations-lon-lat.json

[
  {
    "id": "8880102",
    "location_name": "Fort Johnson Middle Sch",
    "line1": "1825 Camp Road",
    "city": "Charleston",
    "state": "SC",
    "zip": "29412",
    "lat": 32.7341924,
    "lon": -79.9723717
  },
  {
    "id": "8880103",
    "location_name": "First Baptist Church",
    "line1": "602 Georgia Ave",
    "city": "North Augusta",
    "state": "SC",
    "zip": "29841",
    "lat": 33.495055,
    "lon": -81.969493
  },
  {
    "id": "8880104",
    "location_name": "Christ Lutheran Church",
    "line1": "829 William Hilton Pkwy",
    "city": "Hilton Head Isl",
    "state": "SC",
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    "location_name": "St Davids Lutheran Church",
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    "location_name": "Kline Town Hall",
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    "location_name": "Lesslie Elementary School",
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    "location_name": "Trenholm Park",
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    "location_name": "Tri City Rescue Squad Bld",
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    "location_name": "Saint Helena Library",
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    "location_name": "Burnettown Municipal Bldg",
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    "location_name": "Mary Ford Elem School",
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    "location_name": "New Holland Baptist Church",
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    "location_name": "Haut Gap Middle School",
    "line1": "1861 Bohicket Road",
    "city": "Johns Island",
    "state": "SC",
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    "id": "8880466",
    "location_name": "Nmb Community Center",
    "line1": "1030 Possum Trot Rd",
    "city": "N Myrtle Beach",
    "state": "SC",
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    "id": "8880467",
    "location_name": "Garden City Fire Station",
    "line1": "280 Azalea Rd",
    "city": "Garden City",
    "state": "SC",
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    "id": "8880468",
    "location_name": "McCall Brothers Diving",
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    "city": "Salem",
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    "id": "8880470",
    "location_name": "Meggett Town Hall",
    "line1": "4776 Highway 165",
    "city": "Meggett",
    "state": "SC",
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    "id": "8880471",
    "location_name": "Ron McNair Jr High School",
    "line1": "311 Carver St",
    "city": "Lake City",
    "state": "SC",
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    "id": "8880472",
    "location_name": "Round Hill Baptist Church",
    "line1": "230 Persimmon Ln",
    "city": "Lexington",
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    "id": "8880473",
    "location_name": "Emanuel Baptist Church",
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    "city": "Camden",
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    "id": "8880474",
    "location_name": "Ulmer Town Hall",
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    "city": "Ulmer",
    "state": "SC",
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    "id": "8880475",
    "location_name": "Honea Path Middle School",
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    "city": "Honea Path",
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    "id": "8880477",
    "location_name": "Old Train Depot",
    "line1": "18748 Heritage Hwy",
    "city": "Denmark",
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    "id": "8880478",
    "location_name": "West Florence Fire Station",
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    "city": "Florence",
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    "id": "8880479",
    "location_name": "Royall Elementary School",
    "line1": "1101 Cheraw Dr",
    "city": "Florence",
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    "id": "8880480",
    "location_name": "Putman Recreation Bldg.",
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    "id": "8880481",
    "location_name": "St John Catholic Church",
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    "city": "N Charleston",
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    "id": "8880482",
    "location_name": "J L Mann High School",
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    "city": "Greenville",
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    "location_name": "Woodmont Middle School",
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    "city": "Piedmont",
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    "id": "8880484",
    "location_name": "Mount Able Baptist Church",
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    "city": "Pendleton",
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    "location_name": "A C Moore Elementary",
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    "city": "Columbia",
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    "id": "8880486",
    "location_name": "Sellers Library & Resource Center",
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    "city": "Sellers",
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    "id": "8880487",
    "location_name": "Crossroads Fire Station",
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    "id": "8880490",
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    "location_name": "Baron DeKalb Elem. School",
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    "id": "8880492",
    "location_name": "Bamberg City Civic Center",
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    "id": "8880493",
    "location_name": "Greenview Park",
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    "id": "8880496",
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    "id": "8880497",
    "location_name": "Lourie Senior Ctr",
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    "id": "8880498",
    "location_name": "Travelers Rest Bapt Ch",
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    "location_name": "Waccamaw Intermediate School",
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    "id": "8880501",
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    "id": "8880502",
    "location_name": "Rocky Creek Missionary Baptist Church",
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    "location_name": "Harleyville Elementary",
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    "city": "Dorchester",
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    "id": "8880505",
    "location_name": "David Smith's Shop",
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    "id": "8880506",
    "location_name": "Voter Registration & Elections",
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    "city": "Walterboro",
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    "id": "8880514",
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    "location_name": "Marion Opera House",
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    "location_name": "The Palms Of Mt Pleasant",
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    "location_name": "Spanish Wells Club",
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    "location_name": "Mt Pleas Nat Guard Armory",
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    "location_name": "Jefferson Community Centr",
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    "id": "8880546",
    "location_name": "Reformation Lutheran Ch",
    "line1": "1118 Union St",
    "city": "Columbia",
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    "id": "8880547",
    "location_name": "Cowpens Civic Ctr Depot",
    "line1": "121 Brown St",
    "city": "Cowpens",
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    "id": "8880548",
    "location_name": "Shaver Rec Gymnasium",
    "line1": "698 W South 4Th St",
    "city": "Seneca",
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    "id": "8880549",
    "location_name": "Laurel Creek Clubhouse",
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    "city": "Rock Hill",
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    "id": "8880550",
    "location_name": "Highland Terrace Comm Ctr",
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    "city": "N Charleston",
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    "id": "8880551",
    "location_name": "NEWBERRY CAREER CTR/HWY 219",
    "line1": "3413 Main St",
    "city": "Newberry",
    "state": "SC",
    "zip": "29108",
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    "id": "8880552",
    "location_name": "Little River Fire Sta.#2",
    "line1": "4731 Baker St",
    "city": "Little River",
    "state": "SC",
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    "id": "8880553",
    "location_name": "Samaria Baptist Church",
    "line1": "6560 Fairview Rd",
    "city": "Batesburg",
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    "id": "8880554",
    "location_name": "Jerusalem Stuckey Baptist Church",
    "line1": "1407 Jamestown Rd",
    "city": "Bishopville",
    "state": "SC",
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    "id": "8880555",
    "location_name": "Clover School Resource Center",
    "line1": "300 Clinton Ave",
    "city": "Clover",
    "state": "SC",
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    "id": "8880556",
    "location_name": "Mt. Pisgah Baptist Church",
    "line1": "535 Nichols Hwy S",
    "city": "Nichols",
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    "id": "8880557",
    "location_name": "S Kilbourne Elementary",
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    "city": "Columbia",
    "state": "SC",
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    "id": "8880558",
    "location_name": "Starr Fire Sta",
    "line1": "7715 Hwy 81 S",
    "city": "Starr",
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    "id": "8880559",
    "location_name": "Lemira Elementary School",
    "line1": "952 Fulton St",
    "city": "Sumter",
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    "id": "8880560",
    "location_name": "Pinckney Hall A",
    "line1": "114 Sun City Ln",
    "city": "Bluffton",
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    "id": "8880561",
    "location_name": "Bethel Hanberry Elem",
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    "city": "Blythewood",
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    "id": "8880562",
    "location_name": "Leavelle McCampbell Sch",
    "line1": "82 Canal St",
    "city": "Graniteville",
    "state": "SC",
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    "id": "8880563",
    "location_name": "National Guard Armory",
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    "city": "Barnwell",
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    "id": "8880565",
    "location_name": "Pleasant Hill Meth. Ch.",
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    "city": "Indian Land",
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    "id": "8880566",
    "location_name": "Boiling Springs Comm Ctr",
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    "city": "Lexington",
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    "id": "8880567",
    "location_name": "Community Center",
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    "city": "Pauline  SC",
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    "id": "8880568",
    "location_name": "Cain Elementary School",
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    "id": "8880570",
    "location_name": "Edwards Memorial Presbyterian Church",
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    "id": "8880571",
    "location_name": "Horatio Fire Station",
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    "id": "8880572",
    "location_name": "Drayton Fire Station",
    "line1": "50 Carney St",
    "city": "Spartanburg",
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    "id": "8880573",
    "location_name": "Right Direction Christian Ctr",
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    "id": "8880574",
    "location_name": "Fair Play Elem School",
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    "id": "8880575",
    "location_name": "New Harvest Church Of God",
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    "id": "8880576",
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    "id": "8880577",
    "location_name": "St Michaels Lutheran Ch",
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    "location_name": "Prosperity-Rikard Elementary School",
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    "id": "8880580",
    "location_name": "Reedy River Missionary Baptist Church",
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    "location_name": "Hamilton Career Center",
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    "id": "8880584",
    "location_name": "Orbg Municipal Airport",
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    "location_name": "Mouzon Presb Church",
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    "id": "8880587",
    "location_name": "Montmorenci First Bapt Ch",
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    "id": "8880590",
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    "id": "8880597",
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    "id": "8880599",
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    "location_name": "MAYER MEMORIAL CHURCH",
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    "line1": "319 Carlisle St",
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    "id": "8880640",
    "location_name": "Magnolia Grove Clubhouse",
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    "id": "8880642",
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    "line1": "1100 Log Shoals Rd",
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    "location_name": "Cainhoy School",
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    "city": "Huger",
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    "id": "8880733",
    "location_name": "Crocketville Comm Center",
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    "location_name": "New Hope Baptist Church",
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    "location_name": "Warren Chapel UM Church",
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    "id": "8880737",
    "location_name": "Voter Registration Office",
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    "id": "8880738",
    "location_name": "Voter Registration Office(Barrier Free)",
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    "id": "8880739",
    "location_name": "Couchton Fire Subst No. 2",
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    "id": "8880740",
    "location_name": "Voter Registration Office",
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    "location_name": "Scotia Town Hall",
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    "location_name": "Saluda Elem. Sch. Library",
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    "location_name": "Cross Roads Baptist Church",
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    "location_name": "Carvers Bay High School",
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    "location_name": "Summit Town Hall",
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    "location_name": "Highpoint Baptist Church",
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    "location_name": "Elijah Washington Medical Center",
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    "location_name": "Christ Community Church",
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    "location_name": "JOHNSTONE-Metropolitan Baptist Church",
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    "location_name": "Steeplechase Museum",
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    "location_name": "Prince Hall Masonic Lodge",
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    "location_name": "Beaumont Methodist Church",
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    "location_name": "Halsellville",
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    "location_name": "Meals On Wheels",
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    "location_name": "Shulerville Fire Dept",
    "line1": "1037 Fortview Rd",
    "city": "Jamestown",
    "state": "SC",
    "zip": "2945

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