Jason Davies’ implementation of the Chamberlin trimetric projection is available as d3.geo.chamberlin
in the extended geographic projections plugin.
Last active
February 9, 2016 02:05
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Chamberlin Trimetric
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license: gpl-3.0 |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
body { | |
background: #fcfcfa; | |
} | |
.stroke { | |
fill: none; | |
stroke: #000; | |
stroke-width: 3px; | |
} | |
.fill { | |
fill: #fff; | |
} | |
.graticule { | |
fill: none; | |
stroke: #777; | |
stroke-width: .5px; | |
stroke-opacity: .5 | |
} | |
.land { | |
fill: #222; | |
} | |
.boundary { | |
fill: none; | |
stroke: #fff; | |
stroke-width: .5px; | |
} | |
</style> | |
<body> | |
<script src="//d3js.org/d3.v3.min.js"></script> | |
<script src="//d3js.org/d3.geo.projection.v0.min.js"></script> | |
<script src="//d3js.org/topojson.v1.min.js"></script> | |
<script> | |
var width = 960, | |
height = 900; | |
var projection = d3.geo.chamberlin() | |
.points([[0, 22], [45, 22], [22.5, -22]]) | |
.center([-2.5, -1.5]) | |
.scale(510) | |
.translate([width / 2, height / 2]) | |
.precision(.1) | |
.clipAngle(70); | |
var path = d3.geo.path() | |
.projection(projection); | |
var graticule = d3.geo.graticule() | |
.extent([[-30, -40], [70, 50]]); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
var defs = svg.append("defs"); | |
defs.append("path") | |
.attr("id", "outline") | |
.datum(graticule.outline) | |
.attr("d", path); | |
defs.append("clipPath") | |
.attr("id", "clip") | |
.append("use") | |
.attr("xlink:href", "#outline"); | |
svg.append("use") | |
.attr("class", "stroke") | |
.attr("xlink:href", "#outline"); | |
svg.append("use") | |
.attr("class", "fill") | |
.attr("xlink:href", "#outline"); | |
svg.append("path") | |
.datum(graticule) | |
.attr("class", "graticule") | |
.attr("d", path); | |
d3.json("/mbostock/raw/4090846/world-50m.json", function(error, world) { | |
if (error) throw error; | |
var g = svg.insert("g", ".graticule") | |
.attr("clip-path", "url(#clip)"); | |
g.append("path") | |
.datum(topojson.feature(world, world.objects.land)) | |
.attr("class", "land") | |
.attr("d", path); | |
g.append("path") | |
.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; })) | |
.attr("class", "boundary") | |
.attr("d", path); | |
}); | |
d3.select(self.frameElement).style("height", height + "px"); | |
</script> |
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