Geocentric Datum of Australia (GDA)
Gazettal
The Geocentric Datum of Australia was gazetted in the Commonwealth of Australia Gazette: No. GN 35 6 September 1995 Government Departments page 3369
NEW GEODETIC DATUM FOR AUSTRALIA
The meeting of the Inter-governmental Committee on Surveying and Mapping held in Canberra on 28-29 November 1994 adopted the following new geodetic datum for Australia and recommended its progressive implementation Australia-wide by 1 January 2000: Designation - The Geocentric Datum of Australia (GDA).
Reference Ellipsoid - Geodetic Reference System 1980 (GRS80) ellipsoid with a semi-major axis (a) of 6 378 137 metres exactly and an inverse flattening (l/f) of 298.257 222 101.
Reference Frame - The GDA is realised by. the co-ordinates of the following Australian Fiducial Network (AFN) geodetic stations referred to the GRS80 ellipsoid determined within the International Earth Rotation Service Terrestrial Reference Frame 1992 (ITRF92) at the epoch of 1994.0:
| South Latitude | East Longitude | Ellipsoidal Height |
|---|
| AU 012 Alice Springs | 23° 40' 12.44592" | 133° 53' 07.84757" | 603.358 metres |
| AU 013 Karratha | 20° 58' 53.17004" | 117° 05' 49.87255" | 109.246 metres |
| AU 014 Darwin | 12° 50' 37.35839" | 131° 07' 57.84838" | 125.197 metres |
| AU 015 Townsville | 19° 20' 50.42839" | 146° 46' 30.79057" | 587.077 metres |
| AU 016 Hobart | 42° 48' 16.98506" | 147° 26' 19.43548" | 41.126 metres |
| AU 017 Tidbinbilla | 35° 23' 57.15627" | 148° 58' 47.98425" | 665.440 metres |
| AU 019 Ceduna | 31° 52' 00.01664" | 133° 48' 35.37527" | 144.802 metres |
| AU 029 Yaragadee | 29° 02' 47.61687" | 115° 20' 49.10049" | 241.291 metres |
H. Houghton
Chairman
Inter-governmental Committee on Surveying and Mapping
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