Western Australian Current Regulations

OFFSHORE MINERALS REGULATIONS 2010 - REG 4

4 .         Geocentric Datum of Australia

        (1)         In this regulation —

        AFN coordinates means the coordinates of the Australian Fiducial Network geodetic stations specified in Schedule 1;

        GDA means the Geocentric Datum of Australia;

        GRS80 ellipsoid means the Geodetic Reference System 1980 ellipsoid.

        (2)         The GDA is prescribed for the purposes referred to in section 10(1).

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

        (4)         The reference frame for the GDA is realised by the AFN coordinates referred to the GRS80 ellipsoid determined within the International Earth Rotation Service Terrestrial Reference Frame 1992 (ITRF92) at the epoch of 1994.0.