View this code at http://livecoding.io/4197788
Created
December 3, 2012 20:33
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created by livecoding - http://livecoding.io/3419324
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{ | |
"libraries": [ | |
"d3" | |
], | |
"mode": "html", | |
"layout": "sketchpad mode" | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.country { | |
fill: #ccc; | |
stroke: #fff; | |
stroke-width: .5px; | |
stroke-linejoin: round; | |
} | |
.graticule { | |
fill: none; | |
stroke: #000; | |
stroke-opacity: .3; | |
stroke-width: .5px; | |
} | |
.graticule.outline { | |
stroke: #333; | |
stroke-opacity: 1; | |
stroke-width: 1.5px; | |
} | |
</style> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="http://d3js.org/d3.geo.projection.v0.min.js"></script> | |
<script src="http://d3js.org/topojson.v0.min.js"></script> | |
<script> | |
var width = 960, | |
height = 500; | |
var projection = d3.geo.kavrayskiy7(); | |
var path = d3.geo.path() | |
.projection(projection); | |
var graticule = d3.geo.graticule(); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
svg.append("path") | |
.datum(graticule) | |
.attr("class", "graticule") | |
.attr("d", path); | |
svg.append("path") | |
.datum(graticule.outline) | |
.attr("class", "graticule outline") | |
.attr("d", path); | |
d3.json("http://bl.ocks.org/d/4188334/readme-world.json", function(error, world) { | |
var neighbors = topojson.neighbors(world, world.objects.countries.geometries), | |
colors = d3.scale.category10().range().map(function(c) { c = d3.hcl(c); c.c *= .5; c.h = c.h / 2 + 230; return c; }), | |
nColors = colors.length, | |
colorByObject = {}; | |
world.objects.countries.geometries.forEach(function(o, index) { | |
var oNeighbours = neighbors[index] || [], | |
m = oNeighbours.length; | |
nextColor: | |
for (var i = 0; i < nColors; ++i) { | |
var color = colors[i]; | |
for (var j = 0; j < m; ++j) { | |
if (colorByObject[oNeighbours[j].id] === color) continue nextColor; | |
} | |
colorByObject[o.id] = color; | |
break; | |
} | |
}); | |
svg.selectAll(".country") | |
.data(topojson.object(world, world.objects.countries).geometries) | |
.enter().insert("path", ".graticule") | |
.attr("class", "country") | |
.attr("d", path) | |
.style("fill", function(d) { return colorByObject[d.id]; }); | |
}); | |
topojson.neighbors = function(topology, objects) { | |
var objectsByArc = topology.arcs.map(function() { return []; }); | |
function line(arcs, index) { | |
for (var i = 0, n = arcs.length, arc; i < n; ++i) { | |
if ((arc = arcs[i]) < 0) arc = ~arc; | |
objectsByArc[arc].push(index); | |
} | |
} | |
function polygon(arcs, i) { | |
arcs.forEach(function(arc) { line(arc, i); }); | |
} | |
function geometry(o, i) { | |
geometryType[o.type](o.arcs, i); | |
} | |
var geometryType = { | |
LineString: line, | |
MultiLineString: polygon, | |
Polygon: polygon, | |
MultiPolygon: function(arcs, i) { arcs.forEach(function(arc) { polygon(arc, i); }); } | |
}; | |
objects.forEach(geometry); | |
var neighbors = []; | |
objectsByArc.forEach(function(d) { | |
if (d.length < 2) return; | |
if (!neighbors[d[0]]) neighbors[d[0]] = []; | |
if (!neighbors[d[1]]) neighbors[d[1]] = []; | |
neighbors[d[0]].push(objects[d[1]]); | |
neighbors[d[1]].push(objects[d[0]]); | |
}); | |
return neighbors; | |
}; | |
</script> |
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