This file shows how to use the albersUsa projection from d3-composite-projections. In this case, the example (and projection) is copied directly from the d3 projection, but adding the borders a the composed zones.
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March 1, 2016 10:59
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d3-composite-projections albersUsa
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .land { | |
| fill: #222; | |
| } | |
| .county-boundary { | |
| fill: none; | |
| stroke: #fff; | |
| stroke-width: .5px; | |
| } | |
| .state-boundary { | |
| fill: none; | |
| stroke: #fff; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/topojson.v1.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3-composite-projections/0.3.5/albersUsa-proj.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var projection = d3.geo.albersUsa() | |
| .scale(1000) | |
| .translate([width / 2, height / 2]); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| d3.json("/d/4090846/us.json", function(error, us) { | |
| svg.insert("path", ".graticule") | |
| .datum(topojson.feature(us, us.objects.land)) | |
| .attr("class", "land") | |
| .attr("d", path); | |
| svg.insert("path", ".graticule") | |
| .datum(topojson.mesh(us, us.objects.counties, function(a, b) { return a !== b && !(a.id / 1000 ^ b.id / 1000); })) | |
| .attr("class", "county-boundary") | |
| .attr("d", path); | |
| svg.insert("path", ".graticule") | |
| .datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; })) | |
| .attr("class", "state-boundary") | |
| .attr("d", path); | |
| svg | |
| .append("path") | |
| .style("fill","none") | |
| .style("stroke","#000") | |
| .attr("d", projection.getCompositionBorders()); | |
| }); | |
| d3.select(self.frameElement).style("height", height + "px"); | |
| </script> |
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