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Created May 14, 2016 00:11
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Brazilian States Topojson (Estados do Brasil)
license: mit
height: 600

Topojson with brazilian states (estados brasileiros).

Projection is EPSG:4326.

The polygons are simplified, making the file really small.

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
.state {
fill: #ddc;
fill-opacity: 0.1;
}
.state_contour {
fill: none;
stroke: black;
stroke-linejoin: round;
}
</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://d3js.org/d3-queue.v2.min.js"></script>
<script src="https://d3js.org/topojson.v1.min.js"></script>
<script>
// Define map size on screen
var width = 960,
height = 600;
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var g = svg.append("g");
var zoom = d3.behavior.zoom()
.translate([0, 0])
.scale(1)
.scaleExtent([1, 8])
.on("zoom", zoomed);
svg.call(zoom) // delete this line to disable free zooming
.call(zoom.event);
// Align center of Brazil to center of map
var projection = d3.geo.mercator()
.scale(650)
.center([-52, -15])
.translate([width / 2, height / 2]);
var path = d3.geo.path()
.projection(projection);
// Load data (asynchronously)
d3_queue.queue()
.defer(d3.json, "./br-states.json")
.await(ready);
function ready(error, shp) {
if (error) throw error;
// Extracting polygons and contours
var states = topojson.feature(shp, shp.objects.estados);
var states_contour = topojson.mesh(shp, shp.objects.estados);
// Desenhando estados
g.selectAll(".estado")
.data(states.features)
.enter()
.append("path")
.attr("class", "state")
.attr("d", path);
g.append("path")
.datum(states_contour)
.attr("d", path)
.attr("class", "state_contour");
}
// What to do when zooming
function zoomed() {
g.style("stroke-width", 1.5 / d3.event.scale + "px");
g.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}
d3.select(self.frameElement).style("height", height + "px");
</script>
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