Hell is oneself, Hell is alone, the other figures in it merely projections.
T.S. Elliot
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While most maps, paper or computer, are flat, the world isn’t. Map projections are mathematical methods for representing part or all of the quasi-spherical Earth (irregular oblate spheroid, to be more precise) on a flat surface. The book Flattening the Earth: Two Thousand Years of Map Projections, covers the history and many of the hundreds of projections devised to “flatten the earth”. [...]
Just as a map projection viewer alone, Flex Projector (Java; versions for Windows, Linux and Mac) would be worth a look. It has over 25 pre-defined map projections that you display (along with listed values for their areal/scale/angular errors), and includes the ability to display two projections at once for comparison purposes. [...]
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