*----------------------------------------------------- * Definitions of common ellipsoid * (To be extended as needed) * Ray Sterner, 2002 Apr 18 * See http://164.214.2.59/GandG/wgs84dt/ellips.txt *----------------------------------------------------- * a = semimajor axis in meters * f = flattening factor * name = name of ellipsoid *----------------------------------------------------- * a 1/f Name 6377563.396 299.3249646 Airy 6377340.189 299.3249646 Airy (Modified) 6378160. 298.25 Australian National 6377397.155 299.1528128 Bessel 1841 6377483.865 299.1528128 Bessel 1841 (Namibia) 6378206.400 294.9786982 Clarke 1866 6378249.145 293.465000 Clarke 1880 6377298.556 300.8017 Everest (Brunei, E. Malaysia (Sabah & Sarawak)) 6377276.345 300.8017 Everest 1830 6377301.243 300.8017 Everest 1956 (India and Nepal) 6377309.613 300.8017 Everest (Pakistan) 6377304.063 300.8017 Everest 1948 (W. Malaysia and Singapore) 6377295.664 300.8017 Everest 1969 (W. Malaysia) 6378137. 298.257222101 Geodetic Reference System 1980 (GRS 80) 6378200. 298.3 Helmert 1906 6378270. 297. Hough 1960 6378160. 298.247 Indonesian 1974 6378388.000 297.000000 International 6378245. 298.3 Krassovsky 1940 6378155. 298.3 Modified Fischer 1960 6378160.000 298.250000 South American 1969 6378135. 298.26 WGS 1972 6378137.000 298.257223563 WGS 84