Skip to content

Instantly share code, notes, and snippets.



Forked from nkelner/
Last active Nov 12, 2020
What would you like to do?
A simple vector map of Vermont's Counties.
<!DOCTYPE html>
<meta charset="utf-8">
.county-boundary {
fill: none;
stroke: #333;
stroke-width: 2px;
stroke-linejoin: round;
.state-boundary {
fill: none;
stroke: #333;
stroke-linejoin: round;
text {
font-family: helvetica;
fill: black;
font-weight: 300;
text-anchor: middle;
<script src=""></script>
<script src=""></script>
var width = 960,
height = 700;
var svg ="body").append("svg")
.attr("width", width)
.attr("height", height);
var projection = d3.geo.mercator()
var path = d3.geo.path()
d3.json("vt-counties.json", function(error, vt) {
var vermont = topojson.feature(vt, vt.objects.counties);
.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];
.data(topojson.feature(vt, vt.objects.counties).features)
.attr("class", function(d) {return "county " +;})
.attr("d", path)
.style("fill", "white")
.datum(topojson.feature(vt, vt.objects.counties, function(a, b){return a !== b; }))
.attr("d", path)
.attr("class", "county-boundary");
});"height", height + "px");
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