This example demonstrates encoding a MultiPoint geometry object using TopoJSON.
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August 1, 2016 02:02
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TopoJSON Points
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| path { | |
| stroke-linejoin: round; | |
| } | |
| .land { | |
| fill: #ddd; | |
| } | |
| .states { | |
| fill: none; | |
| stroke: #fff; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script src="//d3js.org/queue.v1.min.js"></script> | |
| <script src="//d3js.org/topojson.v1.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var projection = d3.geo.albers(); | |
| var path = d3.geo.path() | |
| .projection(projection) | |
| .pointRadius(1.5); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| queue() | |
| .defer(d3.json, "/mbostock/raw/4090846/us.json") | |
| .defer(d3.json, "airports.json") | |
| .await(ready); | |
| function ready(error, us, airports) { | |
| if (error) throw error; | |
| svg.append("path") | |
| .datum(topojson.feature(us, us.objects.land)) | |
| .attr("class", "land") | |
| .attr("d", path); | |
| svg.append("path") | |
| .datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; })) | |
| .attr("class", "states") | |
| .attr("d", path); | |
| svg.append("path") | |
| .datum(topojson.feature(airports, airports.objects.airports)) | |
| .attr("class", "points") | |
| .attr("d", path); | |
| } | |
| </script> |
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