Rate of people with university studies in Barcelona.
Third part (and final) of the spam.js choropleth tutorial. With legend and custom projection.
Data: Barcelona City Council.
Last active
September 13, 2019 09:29
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Choropleth III
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| license: mit | |
| border: none | |
| height: 690 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <meta charset="utf-8" /> | |
| <style> | |
| body { | |
| max-width: 960px; | |
| } | |
| .legend { | |
| display: table; | |
| margin: 0 auto; | |
| font-family: "Helvetica Neue", sans-serif; | |
| font-size: 12px; | |
| height: 35px; | |
| width: 250px; | |
| } | |
| </style> | |
| <body> | |
| <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script src="https://d3js.org/queue.v1.min.js"></script> | |
| <script src="https://d3js.org/topojson.v1.min.js"></script> | |
| <script src="https://unpkg.com/rbush@1.4.3/rbush.js"></script> | |
| <script src="https://unpkg.com/spamjs@1.1.0/spam.min.js"></script> | |
| <script src="https://unpkg.com/d3-svg-legend@1.13.0/d3-legend.min.js"></script> | |
| <script type='text/javascript'> | |
| var color = d3.scale | |
| .linear() | |
| .domain([0.1, 0.18, 0.26, 0.33, 0.41]) | |
| .range(["#ca0020", "#f4a582", "#f7f7f7", "#92c5de", "#0571b0"]); | |
| d3 | |
| .select("body") | |
| .append("svg") | |
| .attr("class", "legend"); | |
| var legend = d3.legend | |
| .color() | |
| .shapeHeight(10) | |
| .shapeWidth(50) | |
| .shapePadding(0) | |
| .labelOffset(5) | |
| .labelFormat(d3.format("%")) | |
| .orient("horizontal") | |
| .labelAlign("start") | |
| .scale(color); | |
| d3.select(".legend").call(legend); | |
| d3.json("bcn.json", function(error, d) { | |
| topojson.presimplify(d); | |
| var map = new StaticCanvasMap({ | |
| element: "body", | |
| width: 960, | |
| height: 650, | |
| projection: d3.geo | |
| .mercator() | |
| .center([29.6, 30.47]) | |
| .scale(250000) | |
| .rotate([0, 0, -37.6]), | |
| data: [ | |
| { | |
| features: topojson.feature(d, d.objects["bcn"]), | |
| static: { | |
| paintfeature: function(parameters, d) { | |
| parameters.context.fillStyle = color(d.properties.rate); | |
| parameters.context.fill(); | |
| parameters.context.lineWidth = 0.5; | |
| parameters.context.strokeStyle = "rgba(0,0,0,0.2)"; | |
| parameters.context.stroke(); | |
| } | |
| } | |
| } | |
| ] | |
| }); | |
| map.init(); | |
| }); | |
| </script> |
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