Thanks to Ben Balter For - in this case - showing how the Github CRUD API can be used to tap hosted topojson (or geojson) for cross-domain apps like this D3 implementation.
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Github as a geodata server, take 4: Success with the CRUD API
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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(3500) | |
| .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(["#E0AF2F", "#0B425C"]); | |
| 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.xhr("https://api.github.com/repos/wboykinm/geosprocket-geodata/contents/us.topojson", "application/vnd.github.v3.raw+json", function(error, data) { | |
| us = JSON.parse(data.response); | |
| 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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