he reference ellipsoid is a mathematical definition of the earth's surface, which is similar to the geoid. Because of its relative simplicity, the reference ellipsoid is the preferred geometric model of the earth's surface for computing and displaying the point coordinates (such as latitude, longitude and altitude). Usually said the shape and size of the earth, is in fact a reference ellipsoid and the two semi axis and ellipticity expressed.

Filename	Size	Update
Cpp1.cpp	7353	2015-06-15
Cpp1.dsp	2865	2015-06-15

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