Gall Stereographic projection
The central cylindrical projection is formed by projecting the surface of the globe from its center upon a cylinder tangent to the equator. The cylinder is then cut open along one of the meridians and laid out flat. This projection exaggerates high latitudes even more than Mercator’s, and it used only for astronomical purposes. The cylindrical equal-area projection is developed by projecting the surface of the globe, with horizontal rays from its axis, upon a cylinder tangent to the equator. Because of its extreme distortion at higher latitudes, this too is rarely used.
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