Wolfram|Alpha

Computing...

Input interpretation:

GRS80  (geodetic reference ellipsoid)


Properties of reference ellipsoid:

name | GRS80\nmean radius | 2.09023×10^7 feet\n3958.76 miles\neccentricity | 0.0818192\nsemimajor axis | 2.09256×10^7 feet\n3963.19 miles\nsemiminor axis | 2.08555×10^7 feet\n3949.9 miles