1 | <!DOCTYPE html> |
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2 | <html> |
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3 | <head> |
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4 | <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> |
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5 | <title>U.S. States</title> |
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6 | <script type="text/javascript" src="../../d3.js"></script> |
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7 | <script type="text/javascript" src="../../d3.geo.js"></script> |
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8 | <style type="text/css"> |
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9 | |
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10 | svg { |
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11 | width: 960px; |
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12 | height: 500px; |
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13 | } |
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14 | |
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15 | #states path, #state-centroids circle { |
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16 | fill: #ccc; |
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17 | stroke: #fff; |
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18 | stroke-width: 1.5px; |
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19 | } |
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20 | |
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21 | #state-centroids circle { |
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22 | fill: steelblue; |
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23 | fill-opacity: .8; |
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24 | } |
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25 | |
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26 | </style> |
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27 | </head> |
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28 | <body> |
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29 | <script type="text/javascript"> |
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30 | |
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31 | // The radius scale for the centroids. |
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32 | var r = d3.scale.sqrt() |
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33 | .domain([0, 1e6]) |
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34 | .range([0, 10]); |
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35 | |
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36 | // Our projection. |
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37 | var xy = d3.geo.albersUsa(); |
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38 | |
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39 | var svg = d3.select("body").append("svg:svg"); |
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40 | svg.append("svg:g").attr("id", "states"); |
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41 | svg.append("svg:g").attr("id", "state-centroids"); |
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42 | |
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43 | d3.json("../data/us-states.json", function(collection) { |
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44 | svg.select("#states") |
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45 | .selectAll("path") |
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46 | .data(collection.features) |
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47 | .enter().append("svg:path") |
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48 | .attr("d", d3.geo.path().projection(xy)); |
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49 | }); |
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50 | |
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51 | d3.json("../data/us-state-centroids.json", function(collection) { |
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52 | svg.select("#state-centroids") |
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53 | .selectAll("circle") |
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54 | .data(collection.features |
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55 | .sort(function(a, b) { return b.properties.population - a.properties.population; })) |
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56 | .enter().append("svg:circle") |
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57 | .attr("transform", function(d) { return "translate(" + xy(d.geometry.coordinates) + ")"; }) |
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58 | .attr("r", 0) |
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59 | .transition() |
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60 | .duration(1000) |
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61 | .delay(function(d, i) { return i * 50; }) |
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62 | .attr("r", function(d) { return r(d.properties.population); }); |
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63 | }); |
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64 | |
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65 | </script> |
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66 | </body> |
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67 | </html> |
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