Geodetic Datums

Geocentric Datum of Australia (GDA)

Learn about Australia's Geocentric Datum and its purpose.

Geoid

Find out about existing Geoid model and data and techniques it uses.

Australian Height Datum (AHD)

Information on height datum used by Australia and how it was developed.

Historical Datums of Australia

Datums used previously.

Link to Other DatumsOther Datums

Learn about the differences between datums.

Topic contact: geodesy@ga.gov.au Last updated: May 8, 2013