This table lists the predefined ellipsoids that can be used in coordinate system and datum definitions. Note that each coordinate system definition must specify either a datum or ellipsoid.
| Ellipsoid | Description |
|---|---|
| AIRY30 | Airy, 1830 |
| AIRY49 | Airy, 1848 |
| AIRY-MOD | Airy, Modified 1849 |
| AIRY-WO | Airy War Office |
| APL4-5 | A.P.L./4.5 |
| AT77 | Average Terrestrial System 1977 |
| ATS | Average Terrestial System 1977, New Brunswick |
| AUSSIE | Australian National Spheroid, 1965 |
| AUSSIE52 | Australian (AIG), 1952 |
| AUSTRALIAN165 | Australian 165 (1962) |
| BESL-JPN | Bessel - 1841, Japan GSI |
| BESL-MOD | Bessel Modified, NGO Norway |
| BESL-NGO | Bessel Modified, NGO Norway |
| BESL-NMB | Bessel, Namibia |
| BESLNMB-GLM | Bessel Namibia (GLM) |
| BESL-TRI | Bessel Triangulation, RT 90 Sweden |
| BESSEL | Bessel, 1841 |
| BESSEL-NORWAY | Norwegian National Ellipsoid (NGO) |
| BPCNC | Sphere having volume equal to International ellipsoid |
| CHINA-80 | Geodetic Reference System of China, 1980 |
| CLARKE1866/INTNLFT | Clarke 1880 (international foot) |
| CLARKE66AUTHALICSPHERE | Clarke 1866 Authalic Sphere |
| CLRK22 | Clarke 1922, IGN |
| CLRK58 | Clarke 1858 |
| CLRK66 | Clarke 1866, Benoit Ratio |
| CLRK80 | Clarke 1880, RGS |
| CLRK80-BEN | Clarke 1880, Benoit Ratio |
| CLRK80-FIJI | Clarke 1880, Fiji |
| CLRK80-STRASSER | Clarke 1880 |
| CLRK80-SYRIA | Clarke 1880, Fiji |
| CLRK85 | Clarke 1885 |
| CLRK-ARC | Clarke 1880, ARC |
| CLRK-IGN | Clarke 1880, Institut Geographique National (France) |
| CLRK-MOD | Clarke 1880, Modified for Israel (Palestine) |
| CLRK-PAL | Clarke Palestine |
| CLRK-RGS | Clark 1880, RGS |
| CLRKS | Clarke 1866, Spherical |
| COMMUNE | Communite des Poids et Measures, 1799 |
| DANEMARK | Danemark |
| DANISH | Danish or Andrae |
| DELA1810 | Delambre, 1810 |
| DELA-BELGE | Delambre 1810, Belgium |
| DELAMBRE1800 | Delambre (1800) |
| DELA-MOD | Delambre Modified, Hydro |
| ENGELIS | Engelis 1985 |
| EVEREST | Everest Indian, 1830 (1937 Adjustment) |
| EVEREST1830 | Everest (1830 Definition) |
| EVEREST1830/67 | Everest 1830 (1967 Definition) |
| EVEREST1830DEF62 | Everest 1830 (1962 Definition) |
| EVEREST1830DEF75 | Everest 1830 (1975 Definition) |
| EVEREST1830M_BSP | Everest 1830 Modified for BSP |
| EVEREST1969/RSO | Everest 1830 (RSO 1969) |
| EVERESTPAKISTAN | Ellipsoid for Everest Pakistan |
| EVRST-67 | Everest 1967, East Malaysia (uses Sears 1928 inch-metre ratio) |
| EVRST-BORNEO | Everest, Brunei |
| EVRST-BR | Everest, Brunei |
| EVRST-IM | Everest Imperial, 1830 |
| EVRST-IM-M | Everest Imperial 1830, 1975 definition after metrication |
| EVRST-IN | Everest India, 1956 |
| EVRST-MALAY | Everest, Malaysia 1969 |
| EVRST-MD | Everest 1830, Modified Malaysia and Singapore 1948 |
| EVRST-PK | Everest Pakistan |
| EVRST-PK-M | Everest Imperial 1830, 1962 definition after metrication |
| EVRST-TM | Everest 1830, Timbalai (1967 Adjustment) |
| FSHR1960 | Fischer, 1960 (Mercury) |
| FSHR1968 | Fischer, 1968 |
| FSHR60MD | Modified Fischer, 1960 (South Asia) |
| GEM-10C | GEM 10C |
| GERMAINE | Germaine, Djibouti |
| GHANA-WO | Ghana -- Labeled 'War Office', given in feet, assumed IFOOT |
| GRS1967 | Geodetic Reference System, 1967 |
| GRS1967-MOD | Geodetic Reference System, 1967, Taiwan |
| GRS1980 | Geodetic Reference System of 1980 |
| GRS1980-JPN | Geodetic Reference System of Japan, 1980 |
| GRS1980-MOD | Geodetic Reference System of 1980, Taiwan |
| GRS80_NO_FLATTENING | GRS80 Sphere (No Flattening) |
| GRS80SPHEREAUTHALIC | GRS 1980 Authalic Sphere |
| HAYFORD | Hayford, 1924 (aka 1909); same as International 1924 |
| HAYFORD1906 | Hayford (1906) |
| HEIS-29 | Heiskanen, 1929 |
| HEISKANEN1926 | Heiskanen (1926) |
| HELMERT1907 | Helmert (1907) |
| HLMRT06 | Helmert, 1906 (also known as Helmert 1907) |
| HOLLAND | Holland |
| HOUGH | Hough |
| Hughes1980 | Hughes 1980 |
| ID74 | Indonesian 1974 |
| INDO74 | Indonesian National Spheroid, 1974 |
| INDONESIANNTL | Indonesian National Spheroid |
| Intnl24AuthalicSphere | Internat8ional [International] 1924 Authalic Sphere |
| INTNL | International - 1924 |
| IUGG-67 | IUGG Reference Ellipsoid, 1967 |
| IUGG75 | IUGG 1975 Ellipsoid |
| IUGG-75 | IUGG Reference Ellipsoid, 1975 (IAG 75) |
| IUGG-75-MOD | IUGG Reference Ellipsoid, 1975 (Modified) |
| JEFF-48 | Jeffreys, 1948 |
| KAULA1961 | Kaula 1961 Ellipsoid |
| KAULA1964 | Kaula (1964) |
| KRASOV | Krassovsky - 1940/1948 |
| KRASOVSKY1936 | Krasovsky (1936) |
| KRAYEN | Krayenhoff 1827 |
| LEDERSTEGER1951 | Ledersteger (1951) |
| LERCH | Lerch 1979 |
| MAUPERT | Maupertius 1738 |
| MERIT-83 | MERIT 83 |
| MICHIGAN | Michigan - Based on Clarke 1866 + 800 feet. |
| NEWINT-67 | New International, 1967 |
| NWL-10D | NWL-10D |
| NWL-9D | NWL-9D, Naval Weapons Laboratory |
| OSU86F | OSU86F, Used for OSU86 gravity potential (geoidal) model |
| OSU86F-MOD | OSU86F modified, Used for OSU86 gravity potential (geoidal) model |
| OSU91A | OSU91A, Used for OSU91 gravity potential (geoidal) model |
| OSU91A-MOD | OSU91A modified, Used for OSU91 gravity potential (geoidal) model |
| PLESSIS | Plessis, 1817 |
| PLESSIS-R | Plessis Reconstituted |
| PRATT1863 | Pratt (1863) |
| PZ-90 | PZ-90 |
| SA1969 | South American 1969 |
| SACLRK80 | Clarke 1880, South Africa modified |
| SCHMIDT | Schmidt 1831, Switzerland |
| SGS85 | Soviet Geodetic System 1985 |
| SGS90 | Soviet Geodetic System 1990 |
| SPHERE | Sphere of radius 6370997 |
| STRU1860 | Struve, 1860 |
| SVANBERG | Svanberg |
| T-BPCNC | Sphere for testing Bipolar Oblique Conformal COnic |
| UNITE | Unit ellipsoid, testing only. Eccentricity same as Clarke 66. |
| UNITS | Unit sphere, testing only |
| UNITS3 | 3.0 Unit sphere, testing only |
| VEIS1964 | Veis (1964) |
| VisualisationSphere | Popular Visualisation Sphere |
| WALB | Walbeck 1819 (Planheft 1942) |
| WALB-AMS | Walbeck 1819 (AMS 1963) |
| WAR_OFC | War Office, McCaw |
| WAROFFICE | War Office |
| WGS60 | World Geodetic System of 1960 |
| WGS66 | World Geodetic System of 1966, NWL 8D |
| WGS67 | World Geodetic System of 1967, Lucerne |
| WGS72 | World Geodetic System of 1972 |
| WGS84 | World Geodetic System of 1984, GEM 10C |
| XIAN | Xian 1980, China |
| XIAN80 | Xian 1980 |
| YELLOW | Yellow Sea, China 1956 |