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Web Mercator

Web Mercator is a projection derived from Transverse Mercator. It maps ellipsoidal latitude and longitude coordinates onto a plane using Spherical Mercator equations. This projection was popularized by Google in Google Maps, and it is now widely used in online mapping systems. It stretches areas in a north-south direction and, unlike the Transverse Mercator, it is not conformal. Consider the following image:

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