A demo of TopoJSON on a U.S. counties shapefile from the U.S. census bureau.
forked from mbostock's block: U.S. Counties TopoJSON Mesh
Last active
September 18, 2018 21:22
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U.S. Counties TopoJSON Mesh
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| license: gpl-3.0 | |
| height: 600 | |
| border: no |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <svg width="960" height="600"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/topojson.v2.min.js"></script> | |
| <script> | |
| var svg = d3.select("svg"); | |
| d3.json("https://d3js.org/us-10m.v1.json", function(error, us) { | |
| if (error) throw error; | |
| var path = d3.geoPath(), | |
| mesh = topojson.mesh(us), | |
| transform = topojson.transform(us); | |
| svg.append("path") | |
| .attr("fill", "none") | |
| .attr("stroke", "#000") | |
| .attr("stroke-width", 0.25) | |
| .attr("stroke-linejoin", "round") | |
| .attr("d", path(mesh)); | |
| svg.selectAll("circle") | |
| .data(us.arcs) | |
| .enter().append("circle") | |
| .attr("transform", function(d) { return "translate(" + transform(d[0]) + ")"; }) | |
| .attr("r", 1.25); | |
| }); | |
| </script> |
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