GDA2020

Landgate has committed to GDA2020 implementation

Landgate has approved the GDA2020 implementation project. That means we are now committed to change our systems and update datasets to take advantage of the new datum. The implementation however, will be done in stages.

Landgate has already upgraded its online geodetic portal (GOLA) to support both GDA2020 and GDA94 coordinates. This allows us to provide GDA2020 coordinates and their uncertainty. Geospatial data (e.g. cadastral, imagery, administrative boundaries, road centrelines, topographic, geographic names and more) are available for delivery in GDA2020 upon request. For detailed information and how to request data in GDA2020 please contact our Geospatial team.

We see GDA2020 implementation as a process rather than single date event. However, there is a national expectation that everybody will adopt new datum by 30th of Jun 2020. GDA2020 queries that are specific to the implementation by Landgate can be directed to the Landgate - GDA modernisation implementation working group by email lg-gmiwg@landgate.wa.gov.au.

GDA2020 transformation products and tools

Coordinate transformation is the process of changing coordinates from one reference frame or datum to another. For example, from GDA94 to GDA2020 or from GDA2020 to ITRF 2014. In contrast, a coordinate conversion changes coordinates from one coordinate reference system to another coordinate reference system on the same datum or reference frame: for example, from GDA2020 latitude and longitude to MGA2020 Easting, Northing and Zone.

GDA94-GDA2020 transformation products and tools

GDA2020 is now the official datum

On 11 October 2017 the National Measurement Institute signed off and gazetted the Geocentric Datum of Australia (GDA2020) as the new Recognised-Value Standard of Measurement of Position. In effect, GDA2020 is now our new datum and GDA94 has been revoked. Here is a link to the Determination.

Our team, together with other jurisdictions and Geoscience Australia, has developed this new datum that consists of all Landgate’s survey archive data (50+ years) as well as modern GNSS survey data (including data donated by your organisations). Such a large single adjustment has never been done before and it was possible due to the increased computing power as well as innovative methods of computing and data analysis.

GDA2020 and GDA94 Technical Manuals

Modernising Australia's Datum - Animated video

Official GDA2020 Forum

Online forum supports switch to GDA2020

An online forum has been established by the ICSM to share experiences and find answers relating to questions about the modernisation of Australia's datum. It is moderated by members of the GDA Modernisation Implementation Working Group and other technical specialists from around Australia.

Australian Terrestrial Reference Frame

Like GDA94, GDA2020 datum is fixed to the Australian continent, where coordinates do not change with time. GDA2020 is a static datum. However, ICSM has endorsed a plan to introduce a time dependant reference frame called Australian Terrestrial Reference Frame or ATRF. Coordinates in ATRF will change over time as the Australian continent drifts and due to local deformation. ATRF is a dynamic datum. ATRF will be introduced in January 2020. For more information refer to datum modernisation in Australia.

Note: Both ATRF and GDA2020 will be supported. GDA2020 will be available for users who do not need a time-dependent reference frame.

Geodetic news

Subscribe to this quarterly Geodetic Newsletter to stay up to date with the latest information from Landgate's Survey Services department.

Need help?

For more information contact a member of the Survey Services team on +61 (0)8 9273 7111 or email geodesy@landgate.wa.gov.au.

This page was last updated on: 13 Nov 2018