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Basic d3 Map of US States
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>D3 Tutorial</title> | |
| <script src='http://d3js.org/d3.v3.min.js'></script> | |
| </head> | |
| <body> | |
| <script> | |
| //Create dimension variables | |
| var width=1760, | |
| height=1700; | |
| //Generate canvas | |
| var canvas = d3.select('body') | |
| .append('svg') | |
| .attr('width',width) | |
| .attr('height',height) | |
| //Load data and creat callback function | |
| d3.json('us_states_5m.json',function(data){ | |
| console.log(data) | |
| //Capture features in group objects | |
| var group = canvas.selectAll('g') | |
| .data(data.features) | |
| .enter() | |
| .append('g') | |
| //Choose projection (https://github.com/mbostock/d3/wiki/Geo-Projections) | |
| var projection = d3.geo.mercator() | |
| //Make the map larger | |
| .scale(750) | |
| //Move the map | |
| .translate([2400,1300]); | |
| //Create path generator | |
| var path = d3.geo.path() | |
| //Pass in projection | |
| .projection(projection); | |
| //Couple path with each group object | |
| var areas = group.append('path') | |
| .attr('d',path) | |
| .attr('class','area') | |
| .attr('fill','steelblue'); | |
| //Add labels | |
| group.append('text') | |
| .attr('x',function(d) {return path.centroid(d)[0]}) | |
| .attr('y',function(d) {return path.centroid(d)[1]}) | |
| .attr('fill','white') | |
| .attr('text-anchor','middle') | |
| .attr('font-size',5) | |
| .text(function(d) {return d.properties.NAME}); | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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