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Τα Ελλειψοειδή εκ περιστροφής που χρησιμοποιούνται στη Γεωδαισία είναι : Ellipsoid list used in Geodesy : Όνομα Ελλειψοειδούς Ellipsoid Name | a | b | f | Χρήση Use |
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| Modified Everest (Malaya) Rev Kertau | 6,377,304.063 | 6,356,103.039 | 300.801699969 | | | Timbalai | 6,377,298.560 | 6,356,097.550 | 300.801639166 | | Everest Spheroid | 6,377,301.243 | 6,356,100.228 | 300.801694993 | | | Maupertuis (1738) | 6,397,300.000 | 6,363,806.283 | 191.000000000 | France | | Everest (1830) | 6,377,276.345 | 6,356,075.413 | 300.801697979 | India | | Airy (1830) | 6,377,563.396 | 6,356,256.909 | 299.324964600 | Britain | | Bessel (1841) | 6,377,397.155 | 6,356,078.963 | 299.152812800 | Europe, Japan | | Clarke (1866) | 6,378,206.400 | 6,356,583.800 | 294.978698200 | North America | | Clarke (1878) | 6,378,190.000 | 6,356,456.000 | 293.465998000 | North America | | Clarke (1880) | 6,378,249.145 | 6,356,514.870 | 293.465000000 | France, Africa | | Helmert (1906) | 6,378,200.000 | 6,356,818.170 | 298.300000000 | | Hayford (1910) | 6,378,388.000 | 6,356,911.946 | 297.000000000 | USA | | International (1924) | 6,378,388.000 | 6,356,911.946 | 297.000000000 | Europe | | NAD 27 | 6,378,206.400 | 6,356,583.800 | 294.978698208 | North America | | Krassovsky (1940) | 6,378,245.000 | 6,356,863.019 | 298.300000000 | Russia | | WGS66 (1966) | 6,378,145.000 | 6,356,759.769 | 298.250000000 | USA/DoD | | Australian National (1966) | 6,378,160.000 | 6,356,774.719 | 298.250000000 | Australia | | New International (1967) | 6,378,157.500 | 6,356,772.200 | 298.249615390 | | | GRS-67 (1967) | 6,378,160.000 | 6,356,774.516 | 298.247167427 | | | South American (1969) | 6,378,160.000 | 6,356,774.719 | 298.250000000 | South America | | WGS-72 (1972) | 6,378,135.000 | 6,356,750.520 | 298.260000000 | USA/DoD | | GRS-80 (1979) | 6,378,137.000 | 6,356,752.3141 | 298.257222101 | | | NAD 83 | 6,378,137.000 | 6,356,752.300 | 298.257024899 | North America | | WGS-84 (1984) | 6,378,137.000 | 6,356,752.3142 | 298.257223563 | Global GPS | | IERS (1989) | 6,378,136.000 | 6,356,751.302 | 298.257000000 | | | IERS (2003) | 6,378,136.600 | 6,356,751.900 | 298.256420000 | Global ITRS |
Κατά τους μετασχηματισμούς υπολογίζονται τα μεγέθη : Transformation formulas : - f επιπλάτυνση (flattening)
| 1/f = a/(a - b) | - e εκκεντρότητα (eccentricity)
| e2 = 2f - f2 | - e' δεύτερη εκκεντρότητα (second eccentricity)
| e'2 = e2 / (1-e2) |
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