Labelled graticules
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<!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> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment