Space Oblique Mercator projection mathematical development

Abstract

IV developed a relatively simple set of equations which applies to circular orbits (such as Landsat) and provides a rigorous near-conformal map projection.Snyder's development of an SOM solution is remarkable because he had little formal training in the sciences related to map projections, he developed and tested his equations using only a pocket calculator, and he worked alone and without compensation.He has now developed more complex equations for non-circular orbits.Snyder's work has been recognized by the U.S. Geological Survey through the John Wesley Powell Award which was presented to him in 1978.As the award indicates, Snyder "provided the sought-after link by which Earth surface data obtained from orbiting spacecraft can now be transformed to any of the common map projections.This is an essential step in automated mapping systems which we see developing."Reston, Va.

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