This is the code for Chapter 7, Figure 3 from D3.js in Action demonstrating how to load GeoJSON data and render it using d3.geo.path() and d3.geo.projection().
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Ch. 7, Fig. 3 - D3.js in Action
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| <html> | |
| <head> | |
| <title>D3 in Action Chapter 7 - Example 1</title> | |
| <meta charset="utf-8" /> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| </head> | |
| <style> | |
| svg { | |
| height: 500px; | |
| width: 500px; | |
| border: 1px solid gray; | |
| } | |
| .countries { | |
| fill: red; | |
| fill-opacity: .5; | |
| stroke: black; | |
| stroke-width: 1px; | |
| } | |
| </style> | |
| <body> | |
| <div id="viz"> | |
| <svg> | |
| </svg> | |
| </div> | |
| <div id="controls" /> | |
| </body> | |
| <footer> | |
| <script> | |
| d3.json("world.geojson", createMap); | |
| function createMap(countries) { | |
| var aProjection = d3.geo.mercator(); | |
| var geoPath = d3.geo.path().projection(aProjection); | |
| d3.select("svg").selectAll("path").data(countries.features) | |
| .enter() | |
| .append("path") | |
| .attr("d", geoPath) | |
| .attr("class", "countries") | |
| } | |
| </script> | |
| </footer> | |
| </html> |
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