GDA2020

Implementation

Landgate has committed to change its systems and update datasets to take advantage of the new datum. The implementation however, is done in stages.

Landgate has already upgraded its geodetic database to provide both GDA2020 and GDA94 coordinates and their uncertainty. To access survey marks information we recommend using Map Viewer Plus. Geospatial data such as cadastral, imagery, administrative boundaries, road centrelines, topographic, geographic names and more are also available for delivery in GDA2020. To request Landgate's spatial data use this form or contact our Geospatial team.

National GMIWG agreed on 30 of June 2020 as the adoption date for GDA2020. The ‘adoption of GDA2020’ has been defined as all Land Agencies in Australian jurisdictions to be receiving and delivering spatial data in GDA2020. We encourage you to start your own implementation. Most software vendors have now implemented the GDA2020 datum and transformation tools. 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.

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 Determination

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 In effect, GDA2020 is now our new datum and GDA94 has been revoked.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 is free of many of the biases and distortions associated with GDA94 and aligns the datum to the global reference frame in which GNSS natively operate.

GDA2020 and GDA94 Technical Manuals

Modernising Australia's Datum - Animated video

Official 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: 06 Feb 2019