Minnesota counties colored by population. Hover over to see the county name and population.
Created in D3. Inspired by http://bl.ocks.org/mbostock/5737662.
Last active
December 27, 2015 05:29
-
-
Save mkessy/7274602 to your computer and use it in GitHub Desktop.
Minnesota counties colored by population
This file contains hidden or 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.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .state-border { | |
| fill: none; | |
| stroke: #333; | |
| } | |
| .county-border { | |
| fill: none; | |
| stroke: #000; | |
| stroke-width: 1.01px; | |
| stroke-linejoin: round; | |
| stroke-linecap: round; | |
| } | |
| svg { | |
| font: 10px sans-serif; | |
| } | |
| .key path { | |
| display: none; | |
| } | |
| .key line { | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/topojson.v1.min.js"></script> | |
| <script> | |
| var width=960, height=500; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| var color = d3.scale.threshold() | |
| .domain([15000,60000,180000,420000]) | |
| .range(["#ffffcc","#c2e699","#78c679","#31a354","#006837"]); | |
| var x = d3.scale.linear() | |
| .domain([0, 500000]) | |
| .range([0, 240]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom") | |
| .tickSize(13) | |
| .tickValues(color.domain()) | |
| .tickFormat(function (n) {return (n/1000).toString()}); | |
| var g = svg.append("g") | |
| .attr("class", "key") | |
| .attr("transform", "translate(40,40)") | |
| var rects = g.selectAll("rect") | |
| .data(color.range().map(function(d,i) { | |
| return { | |
| x0: i ? x(color.domain()[i-1]) : x.range()[0], | |
| x1: i < color.domain().length ? x(color.domain()[i]) : x.range()[1], | |
| z: d | |
| }; | |
| })) | |
| .enter().append("rect") | |
| .attr("height", 8) | |
| .attr("x", function(d){return d.x0;}) | |
| .attr("width", function(d){return d.x1-d.x0;}) | |
| .style("fill", function(d){return d.z;}); | |
| g.call(xAxis).append("text") | |
| .attr("class", "caption") | |
| .attr("y", -6) | |
| .text("Population (thousands)"); | |
| var projection = d3.geo.mercator() | |
| .scale(1) | |
| .translate([0,0]); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| d3.json("mn_state.json", function(error, mn) { | |
| var county_geometries = mn.objects.counties.geometries; | |
| var fixed_county_geometries=[]; | |
| //removing duplicate features | |
| for(var i=0; i<county_geometries.length; i++) { | |
| if(!(county_geometries[i].id===27031 && | |
| county_geometries[i].arcs[0].length === 1)) { | |
| fixed_county_geometries.push(county_geometries[i]); | |
| } | |
| } | |
| mn.objects.states.geometries = [mn.objects.states.geometries[0]]; | |
| mn.objects.counties.geometries = fixed_county_geometries; | |
| var state = topojson.feature(mn, mn.objects.states); | |
| var b = path.bounds(state), | |
| s = 0.95/Math.max((b[1][0]-b[0][0])/width, (b[1][1]-b[0][1])/height), | |
| t = [(width-s*(b[1][0]+b[0][0]))/2, (height - s * (b[1][1]+b[0][1]))/2]; | |
| projection | |
| .scale(s) | |
| .translate(t); | |
| svg.append("path") | |
| .attr("transform", "translate(40,0)") | |
| .datum(topojson.mesh(mn, mn.objects.counties, | |
| function(a,b){return a!==b;})) | |
| .attr("class", "county-border") | |
| .attr("d", path); | |
| //state border | |
| svg.append("path") | |
| .attr("transform", "translate(40,0)") | |
| .datum(topojson.mesh(mn, mn.objects.counties, | |
| function(a,b){return a===b;})) | |
| .attr("class", "state-border") | |
| .attr("d", path); | |
| var counties = svg.append("g") | |
| .attr("transform", "translate(40,0)") | |
| .attr("class", "counties") | |
| .selectAll("path") | |
| .data(topojson.feature(mn, mn.objects.counties).features) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .attr("fill", function(d) {return color(d.properties.population);}) | |
| .append("title") | |
| .text(function(d) {return d.properties.name + ": pop. "+d.properties.population;}) | |
| }); | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment