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Index Entry
The projective transformation “transfers the spherical data to the planar by employing only great circle coordinates, while all other projections employ a progressively complex admixture of great circle and lesser circle coordinates.”
In the projective transformation “from spherical to planar condition the radii of the sphere of reference which penetrate perpendicularly each spherical surface coordinate point of the comprehensive great circle grid, separate from one another at their respective internal ends-- and each and all remain constantly perpendicularr to the transforming, internally shrinking surfaces throughout the transformation, and their original uniform lengths also continue as ‘constant’ throughout the transformation.”
