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step05.html
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<!DOCTYPE html>
<meta charset="utf-8">
<style>
.subunit.SCT { fill: #ddc; }
.subunit.WLS { fill: #cdd; }
.subunit.NIR { fill: #cdc; }
.subunit.ENG { fill: #dcd; }
.subunit.IRL { display: none; }
.subunit-boundary {
fill: none;
stroke: #777;
stroke-dasharray: 2,2;
stroke-linejoin: round;
}
.subunit-boundary.IRL {
stroke: #aaa;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v0.min.js"></script>
<script>
var width = 960,
height = 1160;
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var projection = d3.geo.albers()
.center([0, 55.4])
.rotate([4.4, 0])
.parallels([50, 60])
.scale(6000)
.translate([width / 2, height / 2]);
var path = d3.geo.path()
.projection(projection);
d3.json("data/uk.json", function(error, uk) {
svg.selectAll(".subunit")
.data(topojson.object(uk, uk.objects.subunits).geometries)
.enter().append("path")
.attr("class", function(d) { return "subunit " + d.id; })
.attr("d", path);
svg.append("path")
.datum(topojson.mesh(uk, uk.objects.subunits, function(a, b) { return a !== b && a.id !== "IRL"; }))
.attr("d", path)
.attr("class", "subunit-boundary");
svg.append("path")
.datum(topojson.mesh(uk, uk.objects.subunits, function(a, b) { return a === b && a.id === "IRL"; }))
.attr("d", path)
.attr("class", "subunit-boundary IRL");
});
</script>