Some formats in GPSBabel support multiple datums. For example, the
datum option to the
garmin_txt format allows you to specify
a datum for the output file.
The following is a list of the datums supported by GPSBabel.
| Adindan | Carribean NAD27 | Hjorsey 1955 | Nahrwan | Santo (DOS) |
| AFG | Carthage | Hong Kong 1963 | Naparima BWI | Sapper Hill 43 |
| Ain-El-Abd | Cent America NAD27 | Hu-Tzu-Shan | North America 83 | Schwarzeck |
| Alaska-NAD27 | Chatham 1971 | Indian | N. America 1927 mean | Sicily |
| Alaska-Canada | Chua Astro | Iran | Observatorio 1966 | Sierra Leone 1960 |
| Anna-1-Astro | Corrego Alegre | Ireland 1965 | Old Egyptian | S. Am. 1969 mean |
| ARC 1950 Mean | Cuba NAD27 | ISTS 073 Astro 69 | Old Hawaiian_mean | South Asia |
| ARC 1960 Mean | Cyprus | Johnston Island 61 | Old Hawaiian Kauai | Southeast Base |
| Asc Island 58 | Djakarta(Batavia) | Kandawala | Old Hawaiian Maui | Southwest Base |
| Astro B4 | DOS 1968 | Kerguelen Island | Old Hawaiian Oahu | Tananarive Obs 25 |
| Astro Beacon E | Easter lsland 1967 | Kertau 48 | Oman | Thai/Viet (Indian) |
| Astro pos 71/4 | Egypt | L.C. 5 Astro | OSGB36 | Timbalai 1948 |
| Astro stn 52 | European 1950 | La Reunion | Pico De Las Nieves | Tokyo mean |
| Australia Geo 1984 | European 1950 mean | Liberia 1964 | Pitcairn Astro 67 | Tristan Astro 1968 |
| Bahamas NAD27 | European 1979 mean | Luzon | S. Am. 1956 mean(P) | United Arab Emirates |
| Bellevue IGN | Finnish Nautical | Mahe 1971 | S. Chilean 1963 (P) | Viti Levu 1916 |
| Bermuda 1957 | Gandajika Base | Marco Astro | Puerto Rico | Wake Eniwetok 60 |
| Bukit Rimpah | Geodetic Datum 49 | Masirah Is. Nahrwan | Pulkovo 1942 | WGS 72 |
| Camp_Area_Astro | Ghana | Massawa | Qornoq | WGS 84 |
| Campo_Inchauspe | Greenland NAD27 | Merchich | Quatar National | Yacare |
| Canada_Mean(NAD27) | Guam 1963 | Mexico NAD27 | Rome 1940 | Zanderij |
| Canal_Zone_(NAD27) | Gunung Segara | Midway Astro 61 | S-42(Pulkovo1942) | Sweden |
| Canton_Island_1966 | Gunung Serindung 1962 | Mindanao | S.E.Asia_(Indian) | |
| Cape | GUX1 Astro | Minna | SAD-69/Brazil | |
| Cape_Canaveral_mean | Herat North | Montjong Lowe | Santa Braz |