Weather stations showing variability throughout the year (US)

_.md

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config.json

{"description":"Weather stations showing variability throughout the year (US)","endpoint":"","display":"canvas","public":true,"require":[{"name":"TopoJSON","url":"http://d3js.org/topojson.v0.min.js"},{"name":"TopoJSON","url":"http://d3js.org/topojson.v0.min.js"}],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"stations.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"countries.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"stations_1910.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"countries_simplified.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"us.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01}

countries.json

countries_simplified.json

inlet.js

var r = 5,
    month = Math.floor(37) % 12 + 1; // 1 = January, 12 = December

var projection = d3.geo.equirectangular()
	.center([0,0])
	.scale(145)

var c = tb.ctx;

var path = d3.geo.path()
    .projection(projection)
    .context(c);

var world = tb['countries_simplified'];
var countries = topojson.object(world, world.objects.world);

c.fillStyle = "#181730";
c.rect(0,0, 1000, 800)
c.fill()

// clipping path 
c.beginPath();
path(countries);
c.closePath();
c.clip();

//var values = _.map(stations.features
var colorScale = d3.scale.linear()
	.domain([-500, 1500, 4000])
	.range(['#21C4F7', '#F0F8B3', '#D52323'])
    .interpolate(d3.interpolateLab)

var varianceColorScale = d3.scale.linear()
	.domain([0, 7000])
	.range(['#FFF', '#000'])
    .interpolate(d3.interpolateLab)

var stations = tb['stations'];
var delta = 9500;
var lowerLimit = -4000;
var upperLimit = lowerLimit + delta;

var data = _.chain(stations.features)
.map(function(d, i) {
  var temps = _.chain(d3.range(1, 13))
  .map(function(month, i) {
    return d.properties["val" + month];
  })
  .filter(function(d, i) {
    return !_.isNull(d) && d > -9999;
  })
  .value();
  d.properties.temps = temps;
  return d;  
})
.filter(function(d, i) { 
  return d.properties.temps.length == 12;
})
.value(); // filter out unknown results

console.log(data);

var drawGradient = function(p, i) {
  var coords = _.map(p, function(d, i) { return projection(d) });
 
  var station = data[i]; 
  var value = station.properties["val" + month];
  path.pointRadius(r);
  var variance = d3.max(station.properties.temps) - d3.min(station.properties.temps);
  c.fillStyle = varianceColorScale(variance);
  c.strokeStyle = varianceColorScale(variance);
  c.beginPath();
  c.moveTo(coords[0][0], coords[0][1]);
  _.each(coords.splice(1, coords.length-1), function(d) {
    c.lineTo(d[0], d[1]);
  }), 
  c.fill(); 
  c.stroke(); 
  c.closePath();
};
 
c.save();

var dataVoronoi = _.map(data, function(d) { return d.geometry.coordinates; });

var points = d3.geom.voronoi(dataVoronoi);
_.each(points, drawGradient);

c.restore();

stations.json