Thanks to Ben Balter and others for pointing out that raw geodata (topojson in this case) can be served from github without cross-domain failure the same way that everything else can be served: under the gh-pages umbrella. Also thanks to Tom Macwright for directing me to rawgithub.com
Created
July 22, 2013 19:41
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Github as a geodata server, take 3
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.graticule { | |
fill: none; | |
stroke: #999; | |
} | |
.states { | |
fill: none; | |
stroke: #fff; | |
stroke-linejoin: round; | |
} | |
.counties :hover { | |
fill: yellow !important; | |
} | |
</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 = 1200, | |
height = 800; | |
var projection = d3.geo.satellite() | |
.distance(1.1) | |
.scale(4500) | |
.rotate([82.00, -34.50, 32.12]) | |
.center([-2, 5]) | |
.tilt(30) | |
.clipAngle(25); | |
var graticule = d3.geo.graticule() | |
.extent([[-113, 27], [-47 + 1e-6, 57 + 1e-6]]) | |
.step([3, 3]); | |
var fill = d3.scale.log() | |
.domain([10, 500]) | |
.range(["brown", "steelblue"]); | |
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); | |
d3.json("http://rawgithub.com/wboykinm/geosprocket-geodata/gh-pages/us.topojson", function(error, us) { | |
svg.append("g") | |
.attr("class", "counties") | |
.selectAll("path") | |
.data(topojson.object(us, us.objects.counties).geometries) | |
.enter().append("path") | |
.attr("d", path) | |
.style("fill", function(d) { return fill(path.area(d)); }); | |
svg.append("path") | |
.datum(topojson.mesh(us, us.objects.states, function(a, b) { return a.id !== b.id; })) | |
.attr("class", "states") | |
.attr("d", path); | |
}); | |
</script> | |
July 2013 | Thanks, Mike! |
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