Raster Map Reprojection
Klokan Petr Pridal has produced a raster map reprojection canvas demo using the Proj4js JavaScript library. A map projection is any method of representing the surface of a sphere or other shape on a plane, which distorts the surface but is necessary for creating maps.

He's got the whole World in his map..
The demo calculates the “map projection” directly in the web browser using only JavaScript, and displays the output with canvas.



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