Western Australian Consolidated Regulations

PEARLING (GENERAL) REGULATIONS 1991 - REG 4

4 .         Geocentric Datum of Australia (Act s. 4(1))

        (1)         The Geocentric Datum of Australia (the GDA ) is the prescribed Australian datum for the purposes of section 4(1) of the Act.

        (2)         The reference ellipsoid for the GDA is the Geodetic Reference System 1980 ( GRS80 ) ellipsoid with a semi‑major axis of 6 378 137 m exactly and an inverse flattening (l/f) of 298.257 222 101.

        (3)         The reference frame for the GDA is realised by the coordinates of the following Australian Fiducial Network 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 —

No.	Name	South Latitude	East Longitude	Ellipsoidal Height
AU 012	Alice Springs	23° 40′ 12.44592″	133° 53′ 07.84757″	603.358 m
AU 013	Karratha	20° 58′ 53.17004″	117° 05′ 49.87255″	109.246 m
AU 014	Darwin	12° 50′ 37.35839″	131° 07′ 57.84838″	125.197 m
AU 015	Townsville	19° 20′ 50.42839″	146° 46′ 30.79057″	587.077 m
AU 016	Hobart	42° 48′ 16.98506″	147° 26′ 19.43548″	41.126 m
AU 017	Tidbinbilla	35° 23′ 57.15627″	148° 58′ 47.98425″	665.440 m
AU 019	Ceduna	31° 52′ 00.01664″	133° 48′ 35.37527″	144.802 m
AU 029	Yaragadee	29° 02′ 47.61687″	115° 20′ 49.10049″	241.291 m

        [Regulation 4 inserted in Gazette 19 Aug 2003 p. 3713‑14.]