The science of geodesy bears unmistakeable marks of its two-dimensional origin. It is true that geodesists no longer consider that the Earth is flat, in the sense of being expressible in two Euclidian dimensions — we have, in the course of 2000 or more years, progressed to the stage of two non-Euclidian dimensions — but whenever a third dimension obtrudes, as in Nature it must, it is to be got rid of immediately by means of “corrections”, or simply ignored, so that all calculations may be done on a surface.
KeywordsEquipotential Surface Cartesian Component Plane Triangle Geodetic System Zenith Distance
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