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World Boundaries TopoJSON
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<!DOCTYPE html>
<meta charset="utf-8">
<style>
path {
fill: none;
stroke: #000;
}
.graticule {
fill: none;
stroke: #ccc;
stroke-width: .5px;
}
.foreground {
fill: none;
stroke: #333;
stroke-width: 1.5px;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="topojson.js"></script>
<script>
var width = 960,
height = 500;
var projection = d3.geo.orthographic()
.scale(250)
.clipAngle(90);
var path = d3.geo.path()
.projection(projection);
var graticule = d3.geo.graticule();
var λ = d3.scale.linear()
.domain([0, width])
.range([-180, 180]);
var φ = d3.scale.linear()
.domain([0, height])
.range([90, -90]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
svg.on("mousemove", function() {
var p = d3.mouse(this);
projection.rotate([λ(p[0]), φ(p[1])]);
svg.selectAll("path:not(.foreground)").attr("d", path);
});
svg.append("path")
.attr("class", "graticule")
.datum(graticule)
.attr("d", path);
svg.append("path")
.datum(graticule.outline)
.attr("class", "foreground")
.attr("d", path);
d3.json("readme-world-admin1.json", function(error, topology) {
svg.append("path")
.datum(topojson.mesh(topology))
.attr("d", path);
});
</script>
var topojson = {
version: "0.0.1",
mesh: function(topology) {
var kx = topology.transform.scale[0],
ky = topology.transform.scale[1],
dx = topology.transform.translate[0],
dy = topology.transform.translate[1];
return {
type: "MultiLineString",
coordinates: topology.arcs.map(function(arc) {
var y0 = 0,
x0 = 0;
return arc.map(function(point) {
var x1 = x0 + point[0],
y1 = y0 + point[1];
x0 = x1;
y0 = y1;
return [x1 * kx + dx, y1 * ky + dy];
});
})
};
}
};
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