GRS 80
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GRS 80 is the reference ellipsoid of the NAD83 coordinate system.
a = 6378137.000 m, b = 6356752.314 m, 1/f = 298.257 222 101
GRS 80 is the reference ellipsoid of the NAD83 coordinate system.
a = 6378137.000 m, b = 6356752.314 m, 1/f = 298.257 222 101