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GDA2020 has arrived!

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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 In effect, GDA2020 is now our legal datum and GDA94 has now been revoked. Here is a link to the Determination.

On December 15 2017 Commonwealth Minister for Resources and Northern Australia Matt Canavan announced the GDA2020 datum and its related products. Please visit the Intergovernmental Committee on Survey and Mapping (ICSM) website and Geoscience Australia to access GDA2020 technical documentation and products such as transformation grids and geoid model (AusGeoid2020).

This is great news and a credit to the hard work of the Landgate's team of geodesists and surveyors over the past three years. 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.

It seems 2018 is going to be the year of GDA2020 implementation, which will be a process rather than a single date event. Landgate has committed to change its systems and update datasets to take full advantage of the new datum. The implementation will be done in stages, starting with the update of our geodetic systems (GESMAR and GOLA). Other systems and data, including the Spatial Cadastre Database (SCDB), will be updated later.

As the work on updating Landgate's systems to deliver GDA2020 goes on, we recommend you assess your data and system requirements. Knowing your data is vital and keeping proper metadata, especially the definition of the datum and transformation method, will be critical. If you need more information about Landgate's GDA2020 implementation please do not hesitate to contact mysyelf or anyone in our team at geodesy@landgate.wa.gov.au.

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