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McCulloughRT/convertWebMercator.js

Created October 6, 2016 00:16
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Convert angular degrees to web mercator coordinates
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convertWebMercator.js
var degrees2meters = function(lon,lat) {
var x = lon * 20037508.34 / 180;
var y = Math.log(Math.tan((90 + lat) * Math.PI / 360)) / (Math.PI / 180);
y = y * 20037508.34 / 180;
return [x, y]
}
x = -122.6765
y = 45.5231
console.log(degrees2meters(x,y))
// should result in: [ -13656285.510400057, 5704252.26215099 ]
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