Ellipsoids

Airy 1830
Airy Modified 1849
Australian National Spheroid
Average Terrestrial System 1977
Bessel 1841
Bessel Modified
Clarke 1866
Clarke 1880 (Arc)
Clarke 1880 (Benoit)
Clarke 1880 (IGN)
Clarke 1880 (RGS)
Clarke 1880 (SGA 1922)
Everest 1830 (1937 Adjustment)
Everest 1830 (1962 Definition)
Everest 1830 (1967 Definition)
Everest 1830 (1975 Definition)
Everest 1830 Modified
GEM 10C
GRS 1967
GRS 1967 (SAD69)
GRS 1980
GRS 1980 Authalic Sphere
Helmert 1906
Indonesian National Spheroid
International 1924
Krassowsky 1940
NWL 9D
OSU86F
OSU91A
Plessis 1817
Struve 1860
War Office
WGS 72
WGS 84
Xian 1980