Ellipsoid Name Semi Major Axis (a) Inverse Flattening (1/f) EPSG ID

Airy 1830 6377563.396 299.3249646 7001
Airy Modified 1849 6377340.189 299.3249646 7002
Australian National Spheroid 1965 6378160 298.25 7003
Average Terrestrial System 1977 6378135 298.257 7041
Bessel 1841 6377397.155 299.1528128156 7004
Bessel Modified 6377492.018 299.1528128 7005
Bessel Namibia 6377483.865 299.1528128156 7006
Bessel Namibia (GLM) 6377397.155 299.1528128156 7046
CGCS2000 6378137 298.257222101 7019
Clarke 1858 6378293.6452087592 294.26067636926103 7007
Clarke 1866 6378206.4 294.9786982138982 7008
Clarke 1866 Authalic Sphere 6370997 294.9786982138982 7052
Clarke 1866 Michigan 6378450.047548895 294.978697164674 7009
Clarke 1880 6378249.14480801 293.46630765562986 7034
Clarke 1880 (Arc) 6378249.145 293.4663077 7013
Clarke 1880 (Benoit) 6378300.789 293.4663155389811 7010
Clarke 1880 (Cape) 6378249.145 293.4663077 7013
Clarke 1880 (IGN) 6378249.2 293.4660212936269 7011
Clarke 1880 (International foot) 6378306.3696 293.46630765562986 7055
Clarke 1880 (RGS) 6378249.145 293.465 7012
Clarke 1880 (SGA 1922) 6378249.2 293.46598 7014
Clarke Modified 1880 6378249.145 293.465 7012
Danish 1876 6377019.270 300 7051
Everest 1830 6377299.36559538 300.80172554336184 7042
Everest 1830 (1937 Adjustment) 6377276.345 300.8017 7015
Everest 1830 (1962 Definition) 6377301.243 300.8017255 7044
Everest 1830 (1967 Definition) 6377298.556 300.8017 7016
Everest 1830 (1975 Definition) 6377299.151 300.8017255 7045
Everest 1830 (RSO 1969) 6377295.664 300.8017 7056
Everest 1830 Modified 6377304.063 300.8017 7018
Fischer 1960 6378166 298.3 107002
Fischer 1968 6378150 298.3 107003
Fischer Modified 6378155 298.3 107004
GEM 10C 6378137 298.257223563 7031
GRS 1967 6378160 298.247167427 7036
GRS 1967 6378160 298.25 7050
GRS 1967 Modified 6378160 298.25 7050
GRS 1980 6378137 298.257222101 7019
GRS 1980 Authalic Sphere 6371007 298.257222101 7048
Hayford 1909 6378388 296.959263 7022
Helmert 1906 6378200 298.3 7020
Hough 1960 6378270 297 7053
Hughes 1980 6378273 298.279411123064 7058
IAG 1975 6378140 298.257 7049
IAU 1964 6378160 298.25
IAU 1976 6378140 298.257
IERS 1989 6378136 298.257
IERS 2003 6378136.6 298.25642
Indonesian National Spheroid 1974 6378160 298.2469988 7021
International 1924 6378388 297 7022
International 1924 Authalic Sphere 6371228 297 7057
International 1967 6378160 298.247167427 7036
International 1979 6378137 298.257222101 7019
IUGG 1967 6378160 298.25
IUGG 1975 6378140 298.257
Krassovsky 1940 6378245 298.3 7024
McCaw 1924 6378300 296 7029
MERIT 1983 6378137 298.257
New International 1967 6378160 298.25 7023
NWL 10D 6378135 298.26 7043
NWL 10D 6378135 298.2599998 7026
NWL 9D 6378145 298.25 7025
OSU86F 6378136.2 298.257223563 7032
OSU91A 6378136.3 298.257223563 7033
Plessis 1817 6376523 308.64 7027
PZ-90 6378136 298.257839303 7054
SGS 1985 6378136 298.257
South American 1969 6378160 298.2499973
Southeast Asia 6378155 298.3000002
Struve 1860 6378298.3 294.73 7028
Walbeck 6376896 302.78 107007
War Office Spheroid 6378300 296 7029
WGS 1960 6378165 298.3
WGS 1966 6378145 298.25 107001
WGS 1972 6378135 298.2599998 7043
WGS 1984 6378137 298.2572236 7030
Xian 1980 6378140 298.257 7049

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