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world.html
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world.html
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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="js/d3.v3.min.js"></script>
<script src="js/d3.geo.projection.v0.min.js"></script>
<script src="js/topojson.v1.min.js"></script>
<script>
var width = 960,
height = 500;
var projection = d3.geo.kavrayskiy7(),
color = d3.scale.category10(),
graticule = d3.geo.graticule();
var path = d3.geo.path()
.projection(projection);
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("data/world.json", function(error, world) {
var countries = topojson.feature(world, world.objects.countries).features,
neighbors = topojson.neighbors(world.objects.countries.geometries);
svg.selectAll(".country")
.data(countries)
.enter().insert("path", ".graticule")
.attr("class", "country")
.attr("d", path)
.style("fill", function(d, i) { return color(d.color = d3.max(neighbors[i], function(n) { return countries[n].color; }) + 1 | 0); });
});
</script>