| Code Value | Definition |
|---|---|
| AIRY | Airy |
| AIRYM | Modified Airy |
| AUST | Australian National |
| BES | Bessel 1841 |
| BESN | Bessel 1841 (Namibia) |
| CLK66 | Clarke 1866 |
| CLK80 | Clarke 1880 |
| EVER | Everest |
| EVERM | Modified Everest |
| FIS60 | Fischer 1960 (Mercury) |
| FIS60M | Modified Fischer 1960 |
| FIS68 | Fischer 1968 |
| GRS67 | GRS 1967 |
| HELM | Helmert 1906 |
| HOUG | Hough |
| INT | International |
| KRAS | Krassovsky |
| SA69 | South American 1969 |
| WGS60 | WGS-60 |
| WGS66 | WGS-66 |
| WGS72 | WGS-72 |
| WGS84 | WGS-84/NAD-83 |