Geodetic Datums

Link to All About DatumsAll About Datums

Find out differences between traditional and modern datums. Why are geocentric datums so important?

Link to Geocentric Datum of Australia (GDA)Geocentric Datum of Australia (GDA)

Learn about Australia's Geocentric Datum and its purpose.

Link to GeoidGeoid

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

Link to Australian Height Datum (AHD)Australian Height Datum (AHD)

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

Link to Historical Datums of AustraliaHistorical 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: February 10, 2012