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redistricting-morpher-us-pa-house
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| path { | |
| stroke-width: 1px; | |
| stroke: #444; | |
| } | |
| text { | |
| font: bold 64px Libre Franklin, sans-serif; | |
| text-anchor: middle; | |
| } | |
| </style> | |
| <body> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/d3-color.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-interpolate.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-array.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-geo.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-queue.v3.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/queue-async/1.0.7/queue.min.js"></script> | |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var colors = d3.schemeSet3; | |
| d3.shuffle(colors); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width",width) | |
| .attr("height",height); | |
| var projection = d3.geoConicConformal() | |
| .parallels([39 + 56 / 60, 40 + 58 / 60]) | |
| .rotate([77 + 45 / 60, 0]) | |
| .scale(6000) | |
| .translate([250,4800]); | |
| var path = d3.geoPath(projection); | |
| queue() | |
| .defer(d3.json,"old.geojson") | |
| .defer(d3.json,"new.geojson") | |
| .await(function(err,oldDistricts,newDistricts){ | |
| var combined = oldDistricts.features.map(function(d,i){ | |
| return [d,newDistricts.features[i]].map(path); | |
| }); | |
| var districts = svg.selectAll("path") | |
| .data(combined) | |
| .enter() | |
| .append("path") | |
| .attr("d",next) | |
| .style("fill",function(d,i){ | |
| return colors[i % 8]; | |
| }); | |
| var label = svg.append("text") | |
| .datum(["Old","New"]) | |
| .text(next) | |
| .attr("x",250) | |
| .attr("y",350); | |
| morph(); | |
| function morph() { | |
| districts.transition() | |
| .duration(3200) | |
| .attr("d",next) | |
| .on("end",function(d,i){ | |
| if (i === combined.length - 1) { | |
| morph(); | |
| } | |
| }); | |
| label.transition() | |
| .duration(0) | |
| .delay(3200 / 2) | |
| .on("end",function(){ | |
| label.text(next); | |
| }); | |
| } | |
| }); | |
| function next(d) { | |
| return d.reverse()[1]; | |
| } | |
| </script> |
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