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mbostock/.block

Last active October 21, 2018 21:39
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Lambert Conformal Conic
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.block
license: gpl-3.0
redirect: https://beta.observablehq.com/@mbostock/d3-conic-conformal
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README.md
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index.html
<!DOCTYPE html>
<meta charset="utf-8">
<svg width="960" height="500"></svg>
<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 projection = d3.geoConicConformal();
var path = d3.geoPath()
.projection(projection);
svg.append("path")
.attr("id", "graticule")
.attr("fill", "none")
.attr("stroke", "#777")
.attr("stroke-width", 0.5)
.attr("stroke-opacity", 0.5)
.attr("d", path(d3.geoGraticule10()));
svg.append("path")
.attr("fill", "none")
.attr("stroke", "#000")
.attr("d", path({type: "Sphere"}));
d3.json("https://d3js.org/world-50m.v1.json", function(error, world) {
if (error) throw error;
svg.insert("path", "#graticule")
.datum(topojson.feature(world, world.objects.land))
.attr("fill", "#222")
.attr("d", path);
svg.insert("path", "#graticule")
.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
.attr("fill", "none")
.attr("stroke", "#fff")
.attr("stroke-width", 0.5)
.attr("d", path);
});
</script>
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