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Labelled graticules
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<!-- A refinement of http://bl.ocks.org/mbostock/3664049 with labeled graticules --> | |
<style> | |
.graticule { | |
fill: none; | |
stroke: #000; | |
} | |
.graticule.outline { | |
stroke-width: 2px; | |
} | |
.label { | |
font: 300 9px "Helvetica Neue", Helvetica, Arial, sans-serif; | |
text-anchor: end; | |
} | |
</style> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="http://d3js.org/d3.geo.projection.v0.min.js"></script> | |
<script> | |
var width = 960, | |
height = 540; | |
var projection = d3.geo.winkel3() | |
.scale(160) | |
.translate([width / 2, height / 2]) | |
.precision(.1); | |
var path = d3.geo.path() | |
.projection(projection); | |
var graticule = d3.geo.graticule(); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
svg.selectAll("path") | |
.data(graticule.lines()) | |
.enter().append("path") | |
.attr("class", "graticule line") | |
.attr("id", function(d) { | |
if (d.coordinates[0][0] == d.coordinates[1][0]) { | |
return (d.coordinates[0][0] < 0) ? -d.coordinates[0][0] + "W" : d.coordinates[0][0] + "E"; | |
} | |
else if (d.coordinates[0][1] == d.coordinates[1][1]) { | |
return (d.coordinates[0][1] < 0) ? -d.coordinates[0][1] + "S" : d.coordinates[0][1] + "N"; | |
} | |
}) | |
.attr("d", path); | |
svg.selectAll('text') | |
.data(graticule.lines()) | |
.enter().append("text") | |
.text(function(d) { | |
if ((d.coordinates[0][0] == d.coordinates[1][0]) && (d.coordinates[0][0] % 30 == 0)) {return (d.coordinates[0][0]);} | |
else if (d.coordinates[0][1] == d.coordinates[1][1]) {return (d.coordinates[0][1]);} | |
}) | |
.attr("class","label") | |
.attr("style", function(d) { return (d.coordinates[0][1] == d.coordinates[1][1]) ? "text-anchor: end" : "text-anchor: middle"; }) | |
.attr("dx", function(d) { return (d.coordinates[0][1] == d.coordinates[1][1]) ? -10 : 0; }) | |
.attr("dy", function(d) { return (d.coordinates[0][1] == d.coordinates[1][1]) ? 4 : 10; }) | |
.attr('transform', function(d) { | |
return ('translate(' + projection(d.coordinates[0])[0] + ',' + projection(d.coordinates[0])[1] + ')') | |
}); | |
svg.append("path") | |
.datum(graticule.outline) | |
.attr("class", "graticule outline") | |
.attr("d", path); | |
</script> |
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