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blaurt/latLonToOffsets.js

Created April 20, 2020 05:44
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latLonToOffsets.js
const x = (longitude + 180) * (mapWidth / 360);
const latRad = (latitude * Math.PI) / 180;
const mercN = Math.log(Math.tan(Math.PI / 4 + latRad / 2));
const y = mapHeight / 2 - (mapWidth * mercN) / (2 * Math.PI);
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