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Version two of the choropleth, with files run through mapshaper.
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| county | percent | |
|---|---|---|
| Jefferson | 0.003768843 | |
| El Paso | 0.873115576 | |
| Pitkin | 0.001256281 | |
| Boulder | 0.003768843 | |
| Arapahoe | 0.015075377 | |
| Fremont | 0.003768844 | |
| Douglas | 0.011306533 | |
| Adams | 0.003768843 | |
| Denver | 0.011306533 | |
| Teller | 0.030150754 | |
| Elbert | 0.003768844 | |
| Larimer | 0.003768844 | |
| Park | 0.001256281 | |
| Pueblo | 0.030150754 |
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| county | featureId | |
|---|---|---|
| Adams | 001 | |
| Jefferson | 059 | |
| El Paso | 041 | |
| Pitkin | 097 | |
| Boulder | 013 | |
| Arapahoe | 005 | |
| Fremont | 043 | |
| Douglas | 035 | |
| Denver | 031 | |
| Teller | 119 | |
| Elbert | 039 | |
| Larimer | 069 | |
| Park | 093 | |
| Pueblo | 101 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .overlay { | |
| fill: none; | |
| pointer-events: all; | |
| } | |
| .border { | |
| fill: none; | |
| stroke: #000000; | |
| stroke-linejoin: round; | |
| stroke-linecap: round; | |
| } | |
| .color0 { stroke: #000000; fill:#FFFAFA; } | |
| .color1 { stroke: #000000; fill:#F4C2C2; } | |
| .color3 { stroke: #000000; fill:#FF6961; } | |
| .color4 { stroke: #000000; fill:#FF5C5C; } | |
| .color5 { stroke: #000000; fill#FF1C00; } | |
| .color6 { stroke: #000000; fill:#FF0800; } | |
| .color7 { stroke: #000000; fill:#FF0000; } | |
| .color8 { stroke: #000000; fill:#CD5C5C; } | |
| .color9 { stroke: #000000; fill:#E34234; } | |
| .color10 { stroke: #000000; fill:#D73B3E; } | |
| .color11 { stroke: #000000; fill:#CE1620; } | |
| .color12 { stroke: #000000; fill:#CC0000; } | |
| .color13 { stroke: #000000; fill:#B22222; } | |
| .color14 { stroke: #000000; fill:#B31B1B; } | |
| .color15 { stroke: #000000; fill:#A40000; } | |
| .color16 { stroke: #000000; fill:#800000; } | |
| .color17 { stroke: #000000; fill:#701C1C; } | |
| .color18 { stroke: #000000; fill:#3C1414; } | |
| .color19 { stroke: #000000l fill:#321414; } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script> | |
| <script src="http://d3js.org/queue.v1.min.js"></script> | |
| <script src="http://d3js.org/topojson.v1.min.js"></script> | |
| <script> | |
| $(document).ready(function() { | |
| var width = 960, height = 500; | |
| var percentageByCounty = d3.map(); | |
| var featureIdToCounty = d3.map(); | |
| var quantize = d3.scale.quantize() | |
| .domain([0, .874]) | |
| .range(d3.range(20) | |
| .map(function(i) { return "color" + i; })); | |
| var quantize2 = d3.scale.quantize() | |
| .domain([0, .04]) | |
| .range(d3.range(17) | |
| .map(function(i) { return "color" + i; })); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| queue() | |
| .defer(d3.json, "counties.json") | |
| .defer(d3.json, "colorado.json") | |
| .defer(d3.csv, | |
| "countyToFeatureId.csv", | |
| function(d) { | |
| featureIdToCounty.set(d.featureId, d.county); | |
| }) | |
| .defer(d3.csv, | |
| "county_to_percent.csv", | |
| function(d) { | |
| percentageByCounty.set(d.county, +d.percent); | |
| }) | |
| .await(ready); | |
| function ready(error, counties, states_colorado) { | |
| var projection = d3.geo.albersUsa() | |
| .scale(6200) | |
| .translate([width*1.20,height / 1.52]); | |
| svg.append("g") | |
| .selectAll("path") | |
| .data(counties.features) | |
| .enter() | |
| .append("path") | |
| .attr("class",function(d) { | |
| var percentage = percentageByCounty.get(d.properties.NAME); | |
| if (percentage === undefined) { | |
| return "border"; | |
| } else { | |
| if (percentage > .04) { | |
| return quantize(percentage); | |
| } else { | |
| return quantize2(percentage); | |
| } | |
| } | |
| }) | |
| .attr("d",d3.geo.path() | |
| .projection(projection)); | |
| svg.append("g") | |
| .selectAll("path") | |
| .data(states_colorado.features) | |
| .enter() | |
| .append("path").attr("class","border") | |
| .attr("d",d3.geo.path().projection(projection)); | |
| } | |
| }); | |
| </script> | |
| </script> |
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| choropleth using d3.js and GeoJSON files generated from TIGER data |
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