(© copyright 1996-1999, Timothy G. Feeman and Elaine F. Bosowski.)
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Map projection; Map perspective; Cylindrical projection; Planar (azimuthal) projection;
Conic projection; Polyconic projection; Orthographic projection; Stereographic projection;
Gnomonic projection; Oblique perspective; Polar perspective; Equatorial perspective;
Standard line; T-in-O map (mappamundi).
This image shows a crude T-in-O map (left) and a slightly more refined one (right). Some T-in-O maps were extremely elaborate and ornate.

A cornucopia of map projections. (You must check out this site!)