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@bigeasy
Created October 9, 2012 05:42
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US Median Age by County

US Median Age by County

A display of US median age by county using the census.ide.org API.

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<script type="text/javascript" src="http://d3js.org/d3.v2.js"></script>
<script type="text/javascript" src="https://raw.github.com/IntoMethod/Lightweight-JSONP/master/jsonp.js"></script>
<link type="text/css" rel="stylesheet" href="http://mbostock.github.com/d3/talk/20111018/colorbrewer/colorbrewer.css"/>
<style type="text/css">
#counties path {
stroke: #fff;
stroke-width: .25px;
}
#states path {
fill: none;
stroke: #fff;
stroke-width: 1.5px;
}
</style>
</head>
<body>
<div id="body">
<div id="footer">
U.S. Unemployment, 2008
<div class="hint">use the menu to change the color scale</div>
<div><select>
<optgroup label="Colors by Cynthia Brewer.">
<option value="YlGn">YlGn</option>
<option value="YlGnBu">YlGnBu</option>
<option value="GnBu">GnBu</option>
<option value="BuGn">BuGn</option>
<option value="PuBuGn">PuBuGn</option>
<option value="PuBu">PuBu</option>
<option value="BuPu">BuPu</option>
<option value="RdPu">RdPu</option>
<option value="PuRd">PuRd</option>
<option value="OrRd">OrRd</option>
<option value="YlOrRd">YlOrRd</option>
<option value="YlOrBr">YlOrBr</option>
<option value="Purples">Purples</option>
<option value="Blues" selected>Blues</option>
<option value="Greens">Greens</option>
<option value="Oranges">Oranges</option>
<option value="Reds">Reds</option>
<option value="Greys">Greys</option>
</optgroup>
</select></div>
</div>
</div>
<script type="text/javascript">
var path = d3.geo.path()
.projection(d3.geo.albersUsa()
.scale(1400)
.translate([680, 360]));
var svg = d3.select("#body").append("svg:svg")
.attr("class", "Blues")
.attr("width", 1280)
.attr("height", 800);
var counties = svg.append("svg:g")
.attr("id", "counties");
var states = svg.append("svg:g")
.attr("id", "states");
d3.json("us-counties.json", function(json) {
var pad = d3.format("05d"),
// quantize = d3.scale.quantile().domain([0, 15]).range(d3.range(9)),
quantize = d3.scale.quantile().domain([20, 60]).range(d3.range(9)),
queue = json.features.slice(0).map(function (feature) { return pad(feature.id) }).sort(),
features = [];
// http://arf.hrsa.gov/indep.htm 02201 Defunct as of 5/19/08
var defunct = [ "02201", "02232", "02280" ];
queue = queue.filter(function (feature) { return defunct.indexOf(feature) == -1 });
function obtained (data) {
features = features.concat(json.features.filter(function (feature) { return data[pad(feature.id)] }));
counties.selectAll("path")
.data(features)
.enter().append("svg:path")
.attr("class", function(d) { return "q" + quantize(data[pad(d.id)].data[2010]["P13"]["P013001"]) + "-9"; })
.attr("d", path)
.append("svg:title")
.text(function(d) { return d.properties.name + ": " + data[pad(d.id)].data[2010]["P13"]["P013001"] + ""; });
if (queue.length) obtain();
else alert("done");
}
function obtain () {
var range = queue.splice(0, 90),
params = { url: "http://census.ire.org/data/" + range.join(",") + ".json?tables=P13" };
console.log(range);
JSONP.get("http://census.prettyrobots.com/", params, obtained, "jsonp");
}
//obtain();
alert('loaded');
});
d3.json("us-states.json", function(json) {
states.selectAll("path")
.data(json.features)
.enter().append("svg:path")
.attr("d", path);
});
d3.select("select").on("change", function() {
d3.selectAll("svg").attr("class", this.value);
});
</script>
</body>
</html>
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