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<meta charset="utf-8">
<link href="https://fonts.googleapis.com/css?family=Bungee+Hairline" rel="stylesheet">
<style>
h2 {
font-family: 'Bungee Hairline', cursive;
font-size: 18px;
text-anchor: middle
}
body {
background: radial-gradient(720px at 490px, #081f2b 0%, #061616 100%);
height: 960px;
}
.counties {
stroke: #bfbfbf;
stroke-width: .25;
fill: #fff;
}
.states {
stroke: white;
stroke-width: .2;
fill: none;
}
#neighborhoodPopover {
position: absolute;
text-align: center;
padding: 2px;
font-family: futura;
font-size: 12px;
background: #fff;
border: 0px;
border-radius: 8px;
pointer-events: none;
opacity: 0;
}
.q0-9 { fill:rgb(247,251,255); }
.q1-9 { fill:rgb(222,235,247); }
.q2-9 { fill:rgb(198,219,239); }
.q3-9 { fill:rgb(158,202,225); }
.q4-9 { fill:rgb(107,174,214); }
.q5-9 { fill:rgb(66,146,198); }
.q6-9 { fill:rgb(33,113,181); }
.q7-9 { fill:rgb(8,81,156); }
.q8-9 { fill:rgb(8,48,107); }
</style>
<body>
<div class="g-chart-container">
<h2 style="color:white"> 2016 Presidential Election: Percentage Democratic by County </h2>
</div>
<svg width="960" height="600"></svg>
<div id='neighborhoodPopover'> </div>
<script src="https://d3js.org/d3.v4.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 rateById = d3.map();
var quantize = d3.scaleQuantize()
.domain([0, 1])
.range(d3.range(9).map(function(i) { return "q" + i + "-9"; }));
var projection = d3.geoAlbersUsa()
.scale(1280)
.translate([width / 2, height / 2]);
var path = d3.geoPath()
.projection(projection);
d3.queue()
.defer(d3.json, "us.json")
.defer(d3.csv, "final_edit.csv", function(d) { rateById.set(d.combined_fips, +d.per_dem); })
.defer(d3.csv, "states_edit.csv")
.await(ready)
function ready(error, us, final) {
if (error) throw error;
var defs = svg.append("defs");
//Filter for the outside glow
var filter = defs.append("filter")
.attr("id","glow");
filter.append("feGaussianBlur")
.attr("stdDeviation","3.5")
.attr("result","coloredBlur");
var feMerge = filter.append("feMerge");
feMerge.append("feMergeNode")
.attr("in","coloredBlur");
feMerge.append("feMergeNode")
.attr("in","SourceGraphic");
svg.append("g")
.attr("class", "counties")
.selectAll("path")
.data(topojson.feature(us, us.objects.counties).features)
.enter().append("path")
.attr("stroke", "#FFC300")
.attr("stroke-width", .25)
.attr("stroke-opacity", 0.5)
.attr("class", function(d) { return quantize(rateById.get(d.id)); })
.attr("d", path)
.on("mouseenter", function(d) {
console.log(d);
d3.select(this)
.style("stroke-width", .5)
d3.select("#neighborhoodPopover")
.transition()
.style("opacity", 1)
.style("left", (d3.event.pageX) + "px")
.style("top", (d3.event.pageY) + "px")
.text(rateById.get(d.id))
})
.on("mouseleave", function(d) {
d3.select(this)
.style("stroke-width", .25)
.style("stroke-dasharray", 1)
d3.select("#neighborhoodPopovercountyText")
.transition()
.ease(d3.easeElastic)
.style("opacity", 0);
});
svg.append("path")
.datum(topojson.mesh(us, us.objects.states.id, function(a, b) { return a !== b; }))
.attr("class", "states")
.attr("d", path);
svg.append("path")
.datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }))
.attr("class", "states")
.attr("d", path);
svg.append("g")
.attr("id", "states")
.selectAll("path")
.data(topojson.feature(us, us.objects.states).features)
.enter().append("path")
.attr("d", path)
.on("click", clicked);
svg.append("path")
.datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }))
.attr("id", "state-borders")
.attr("d", path);
}
d3.selectAll("g")
.style("filter", "url(#glow)");
d3.selectAll("path")
.style("filter", "url(#glow)");
function clicked(d) {
var x, y, k;
if (d && centered !== d) {
var centroid = path.centroid(d);
x = centroid[0];
y = centroid[1];
k = 4;
centered = d;
} else {
x = width / 2;
y = height / 2;
k = 1;
centered = null;
}
g.selectAll("path")
.classed("active", centered && function(d) { return d === centered; });
g.transition()
.duration(200)
.ease(d3.easePoly)
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")scale(" + k + ")translate(" + -x + "," + -y + ")")
.style("stroke-width", 1.5 / k + "px");
console.log(us);
}
</script>
https://d3js.org/d3.v4.min.js
https://d3js.org/topojson.v2.min.js