Skip to content

Instantly share code, notes, and snippets.

@nkelner
Last active November 12, 2020 00:10
Show Gist options
  • Save nkelner/5898357 to your computer and use it in GitHub Desktop.
Save nkelner/5898357 to your computer and use it in GitHub Desktop.
A simple vector map of Vermont's Counties.
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.county-boundary {
fill: none;
stroke: #777;
stroke-dasharray: 2,2;
stroke-linejoin: round;
}
.state-boundary {
fill: none;
stroke: none;
stroke-linejoin: round;
}
text {
font-family: helvetica;
fill: black;
font-weight: 300;
text-anchor: middle;
}
</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 = 700;
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var projection = d3.geo.mercator()
var path = d3.geo.path()
.projection(projection);
d3.json("vt-counties.json", function(error, vt) {
var vermont = topojson.feature(vt, vt.objects.counties);
projection
.scale(1)
.translate([0, 0]);
var b = path.bounds(vermont),
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(".counties")
.data(topojson.feature(vt, vt.objects.counties).features)
.enter().append("path")
.attr("class", function(d) {return "county " + d.properties.name;})
.attr("d", path)
.style("fill", "white")
.transition()
.duration(3000)
.style("fill", "#ddc");
svg.append("path")
.datum(topojson.mesh(vt, vt.objects.counties, function(a, b){return a !== b; }))
.attr("d", path)
.attr("class", "county-boundary");
svg.selectAll(".county-label")
.data(topojson.feature(vt, vt.objects.counties).features)
.enter().append("text")
.attr("transform", function(d) { return "translate(" + path.centroid(d) + ")"; })
.attr("dy", ".35em")
.text(function(d) { return d.properties.name; })
.style("font-size", "0px")
.transition()
.delay(3500)
.style("font-size", "12px");
});
d3.select(self.frameElement).style("height", height + "px");
</script>
Display the source blob
Display the rendered blob
Raw
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment