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Last active February 9, 2016 02:06
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Ohio State Plane (N)
license: gpl-3.0
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.county {
fill: #eee;
}
.county:hover {
fill: orange;
}
.county-border {
fill: none;
stroke: #777;
pointer-events: none;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>
var width = 960,
height = 1200;
var projection = d3.geo.conicConformal()
.parallels([40 + 26 / 60, 41 + 42 / 60])
.rotate([82 + 30 / 60, -39 - 40 / 60])
.translate([width / 2, height / 2]);
var path = d3.geo.path()
.projection(projection);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("oh-counties.json", function(error, oh) {
if (error) throw error;
var counties = topojson.feature(oh, oh.objects.counties);
projection
.scale(1)
.translate([0, 0]);
var b = path.bounds(counties),
s = .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.selectAll("path")
.data(counties.features.filter(function(d) { return d.id % 1000; }))
.enter().append("path")
.attr("class", "county")
.attr("d", path)
.append("title")
.text(function(d) { return d.properties.name; });
svg.append("path")
.datum(topojson.mesh(oh, oh.objects.counties, function(a, b) { return a !== b; }))
.attr("class", "county-border")
.attr("d", path);
});
d3.select(self.frameElement).style("height", height + "px");
</script>
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