The other plots show the meridian scale factor for the Equirectangular projection ( h = 1 ) and for the Lambert equal area projection.
2.
One implementation uses an icosahedron as the base polyhedron, hexagonal cells, and the Snyder equal area projection is known as the Icosahedron Snyder Equal Area ( ISEA ) grid.
3.
Along the same line, different Platonic solids could also be used as a starting point instead of an icosahedron or tetrahedron e . g . cubes that are common in video games can be used to represent the Earth with a small aperture and an efficient equal area projection.
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