GDA2020 in Queensland
Australia is in the process of upgrading its geocentric datum to GDA2020 to keep pace with changing technologies and the dynamic nature of the Earth’s surface. GDA2020 will replace GDA94 as the current datum.
Organisations that work with accurate spatial information or rely on location-positioning need to be aware of this change.
Implementing the change
The Intergovernmental Committee on Surveying and Mapping (ICSM) is leading the change nationally and the Department of Natural Resources, Mines and Energy (DNRME) is coordinating implementation of change to the GDA2020 datum in Queensland.
We are currently ensuring that DNRME business, including systems, data and processes, is GDA2020 enabled.
Timeframes and stages
Australia's national datum will be modernised through the adoption of GDA2020 by 30 June 2020.
DNRME is working to ensure all systems, data and processes are available in GDA2020 with sufficient time to allow users to transition their own business to GDA2020 by the adoption date.
|Adoption of GDA2020||30 June 2020 (date recommended by ANZLIC)|
|Transition (sunset phase during which support for GDA94 is maintained)||July 2020 – June 2022|
A wide-ranging GDA2020 and 'datum' education campaign was conducted across Queensland to help stakeholders with adoption of the new datum. Information sessions were held in Brisbane, Rockhampton, Townsville, Emerald, Cairns, Mackay, Hervey Bay and the Sunshine Coast. We met with more than 1,000 surveying, engineering and spatial professionals discussing:
- what datum is
- why we need to change to a new national datum
- Queensland’s approach to planning for the implementation of GDA2020
- how we are approaching the technical implementation within the state Survey Control Database (SCDB) and Digital Cadastral Database (DCDB).
For more information contact email@example.com.
Why do we need a new datum?
GDA94 coordinates tell us where things are in Australia—but these coordinates locate features as if our continental tectonic plate was fixed in 1994. Because our tectonic plate moves approximately 7cm per year, GDA94 coordinates will be out of position relative to a global reference frame by 1.8m in 2020.
Many information systems use satellite positioning systems that have a coordinate framework fixed to the centre of the earth, rather than our tectonic plate. These systems regularly adjust to the current coordinates to maintain accuracy.
However, the difference between Australia's current geocentric datum and global systems will soon be obvious—even to smartphone users—so measures are needed to bring both into alignment and improve the accuracy of how features are located on maps.
Find out more
- To find out more about GDA2020 in Queensland email firstname.lastname@example.org or phone 07 3330 4422.
- Read about Geocentric Datum of Australia (GDA) transformation software.
The following documents may assist in adopting the GDA2020 datum:
- GDA2020 impact assessment methodology (PDF, 589.9KB)
- GDA2020 impact assessment checklist (PDF, 561.1KB)
- Datum transformation – vector data (PDF, 817.7KB)
- Datum transformation – raster data (PDF, 868.6KB)
- GDA2020 – publish data (PDF, 644.6KB)
- GDA94 and GDA2020: Understanding ellipsoid heights vs AHD heights (PDF, 677.3KB)
- Survey Control Data Update to Support GDA2020 (PDF, 1.5MB)
The ICSM website provides more information about modernising Australia's datum, including:
Last reviewed 16 January 2020