5.x implementation of a choropleth map, using Promises.
Forked from mbostock's block: Choropleth
forked from adamjanes's block: Choropleth V5
Last active
March 19, 2019 19:14
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Choropleth V5
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| license: gpl-3.0 | |
| height: 600 | |
| border: no |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .counties { | |
| fill: none; | |
| } | |
| .states { | |
| fill: none; | |
| stroke: #fff; | |
| stroke-linejoin: round; | |
| } | |
| </style> | |
| <svg width="960" height="600"></svg> | |
| <script src="https://d3js.org/d3.v5.min.js"></script> | |
| <script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script> | |
| <script src="https://d3js.org/topojson.v2.min.js"></script> | |
| <script> | |
| var svg = d3.select("svg"), | |
| width = +svg.attr("width"), | |
| height = +svg.attr("height"); | |
| var unemployment = d3.map(); | |
| var stateNames = d3.map(); | |
| var path = d3.geoPath(); | |
| var x = d3.scaleLinear() | |
| .domain([1, 10]) | |
| .rangeRound([600, 860]); | |
| var color = d3.scaleThreshold() | |
| .domain(d3.range(0, 10)) | |
| .range(d3.schemeBlues[9]); | |
| var g = svg.append("g") | |
| .attr("class", "key") | |
| .attr("transform", "translate(0,40)"); | |
| g.selectAll("rect") | |
| .data(color.range().map(function(d) { | |
| d = color.invertExtent(d); | |
| if (d[0] == null) d[0] = x.domain()[0]; | |
| if (d[1] == null) d[1] = x.domain()[1]; | |
| return d; | |
| })) | |
| .enter().append("rect") | |
| .attr("height", 8) | |
| .attr("x", function(d) { return x(d[0]); }) | |
| .attr("width", function(d) { return x(d[1]) - x(d[0]); }) | |
| .attr("fill", function(d) { return color(d[0]); }); | |
| g.append("text") | |
| .attr("class", "caption") | |
| .attr("x", x.range()[0]) | |
| .attr("y", -6) | |
| .attr("fill", "#000") | |
| .attr("text-anchor", "start") | |
| .attr("font-weight", "bold") | |
| .text("Unemployment rate"); | |
| g.call(d3.axisBottom(x) | |
| .tickSize(13) | |
| .tickFormat(function(x, i) { return i ? x : x + "%"; }) | |
| .tickValues(color.domain())) | |
| .select(".domain") | |
| .remove(); | |
| var promises = [ | |
| d3.json("https://d3js.org/us-10m.v1.json"), | |
| d3.tsv("us-state-names.tsv", function(d) { | |
| stateNames.set(d.id, d.name) | |
| }), | |
| d3.tsv("map.tsv", function(d) { | |
| console.log("d in map", d); | |
| unemployment.set(d.name, +d.value); | |
| }) | |
| ] | |
| console.log("before promises") | |
| Promise.all(promises).then(ready) | |
| function ready([us]) { | |
| console.log("in ready", topojson.feature(us, us.objects.states).features) | |
| console.log("statenames", stateNames) | |
| console.log("employment", unemployment) | |
| svg.append("g") | |
| .attr("class", "counties") | |
| .selectAll("path") | |
| .data(topojson.feature(us, us.objects.states).features) | |
| .enter().append("path") | |
| .attr("fill", function(d) { | |
| console.log("d", d) | |
| console.log("unemployment", unemployment) | |
| var sn = stateNames.get(d.id) | |
| console.log("sn",sn) | |
| d.rate = unemployment.get(stateNames.get(d.id)) || 0 | |
| console.log("rate", d.rate) | |
| var col = color(d.rate); | |
| console.log("col", col) | |
| if (col) { | |
| console.log("found col", col, "for d", d) | |
| return col | |
| } else { | |
| return '#ffffff' | |
| } | |
| }) | |
| .attr("d", path) | |
| .append("title") | |
| .text(function(d) { | |
| console.log("title", d) | |
| return d.rate + "%"; }); | |
| svg.append("path") | |
| .datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; })) | |
| .attr("class", "states") | |
| .attr("d", path); | |
| } | |
| </script> |
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| name | value | |
|---|---|---|
| Florida | 2 | |
| New Mexico | 3 | |
| Arkansas | 2 | |
| Oregon | 0 | |
| Tennessee | 9 |
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| id | code | name | |
|---|---|---|---|
| 1 | AL | Alabama | |
| 2 | AK | Alaska | |
| 4 | AZ | Arizona | |
| 5 | AR | Arkansas | |
| 6 | CA | California | |
| 8 | CO | Colorado | |
| 9 | CT | Connecticut | |
| 10 | DE | Delaware | |
| 11 | DC | District of Columbia | |
| 12 | FL | Florida | |
| 13 | GA | Georgia | |
| 15 | HI | Hawaii | |
| 16 | ID | Idaho | |
| 17 | IL | Illinois | |
| 18 | IN | Indiana | |
| 19 | IA | Iowa | |
| 20 | KS | Kansas | |
| 21 | KY | Kentucky | |
| 22 | LA | Louisiana | |
| 23 | ME | Maine | |
| 24 | MD | Maryland | |
| 25 | MA | Massachusetts | |
| 26 | MI | Michigan | |
| 27 | MN | Minnesota | |
| 28 | MS | Mississippi | |
| 29 | MO | Missouri | |
| 30 | MT | Montana | |
| 31 | NE | Nebraska | |
| 32 | NV | Nevada | |
| 33 | NH | New Hampshire | |
| 34 | NJ | New Jersey | |
| 35 | NM | New Mexico | |
| 36 | NY | New York | |
| 37 | NC | North Carolina | |
| 38 | ND | North Dakota | |
| 39 | OH | Ohio | |
| 40 | OK | Oklahoma | |
| 41 | OR | Oregon | |
| 42 | PA | Pennsylvania | |
| 44 | RI | Rhode Island | |
| 45 | SC | South Carolina | |
| 46 | SD | South Dakota | |
| 47 | TN | Tennessee | |
| 48 | TX | Texas | |
| 49 | UT | Utah | |
| 50 | VT | Vermont | |
| 51 | VA | Virginia | |
| 53 | WA | Washington | |
| 54 | WV | West Virginia | |
| 55 | WI | Wisconsin | |
| 56 | WY | Wyoming | |
| 60 | AS | America Samoa | |
| 64 | FM | Federated States of Micronesia | |
| 66 | GU | Guam | |
| 68 | MH | Marshall Islands | |
| 69 | MP | Northern Mariana Islands | |
| 70 | PW | Palau | |
| 72 | PR | Puerto Rico | |
| 74 | UM | U.S. Minor Outlying Islands | |
| 78 | VI | Virgin Islands of the United States |
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