University of South Australia student, Andrew Huynh has created a web-based application to raise awareness about road safety in South Australia. The project combines two (2) open source datasets from Data SA and uses ASP.Net MVC, ArcGIS API, D3.js, Bootstrap, SQL Server Management and Azure to display. You can see Andrew's visualisations here: https://roadsafetyapp.azurewebsites.net/
Academic Research Assistant and Developer at the University of South Australia, Niki Patel has created a visualisation in Python using open data from Data.SA using road crash and suburb geolocation data. You can see Niki's visualisation here https://medium.com/@patelniki324/road-crash-analysis-using-folium-in-python-b4c9a97ca2a5
If you are a South Australian University student and have used Data.SA to create an interesting visualisation and would like to showcase your creation then contact the Data SA Team at datasa@sa.gov.au
The Australian and New Zealand Spatial Information Council (ANZLIC) set 30 June 2020 as the date by which its member agencies in all Australian states and territories will be ready to deliver and receive foundation spatial data on the GDA2020 datum.
The South Australian Government GDA2020 Implementation Working Group (SAGGIWG) are pleased to announce that its member agencies have met that commitment and are able to deliver and receive spatial data in GDA2020. This is a key milestone in the delivery of the state government’s implementation of GDA2020 as the operational datum for South Australia’s spatial data.
This doesn’t mean data is no longer available in GDA94, it means each agency is now able to provide data in GDA94 or GDA2020 at the request of their downstream user. Similarly, agencies are still able to receive data in GDA94 and each agency has its own policies and guidelines with respect to the provision or consumption of its spatial data. Please check with the specific agency you deal with to find out more.
Over the next 12 months, SAGGIWG will continue to work towards making GDA2020 the native datum for all South Australian spatial data.
Over the next 12 months, SAGGIWG will continue to work towards making GDA2020 the native datum for all South Australian spatial data.
Several state government agencies have released their open spatial datasets in both GDA94 and GDA2020. Data is available for download as a zip file containing _GDA94 and _GDA2020 datasets allowing users to choose the datum of the dataset they wish to use.
“Know your data, know your datum”
With some spatial data now available in two datums, it is imperative to “know your data, your datum” and note the metadata of imported datasets to ensure alignment with existing data.
ICSM Metadata Working Group have produced an informative paper titled “Preparing metadata for the Australian Geospatial Reference System” to not only provide guidance for preparing metadata for GDA2020 but also for the Australian Terrestrial Reference Frame (ATRF) and the Australian Vertical Working Surface (AVWS).
With few exceptions, SA Government spatial datasets have been re-projected from GDA94 to GDA2020 using the Conformal + Distortion NTv2 transformation grid developed by Geoscience Australia. Please refer to the ICSM website to understand the differences between transformations.
If it is unclear which transformation parameters have been used to transform the dataset please contact the respective agency’s “contact point”.
Web Mapping
There are known challenges with mixing GDA94 and GDA2020 data through the web mapping medium. The issue originates from early days of web mapping when WGS 84 and its common ‘Web Mercator’ projection were adopted globally as the default datum for web mapping
In 1994, GDA94 and WGS 84 were considered equivalent, so null transformation parameters between GDA94 and WGS 84 were introduced.
Since WGS 84 is a ‘dynamic’ (or ‘time-dependent’) datum in which coordinates of features slowly change as a result of ongoing tectonic motion, this equivalence with the ‘static’ GDA94 slowly degraded until it remained accurate only at the metre level. However, since WGS 84 was generally used for low accuracy positioning or web-mapping applications (metre level or greater) no processes were compromised.
When GDA2020 was defined almost 25 years later, a similar process was employed to create another null transformation between GDA2020 and WGS 84, since WGS 84 was now equivalent to GDA2020. As a consequence, the EPSG registry describes GDA94 ≈ WGS 84 ≈ GDA2020 for low accuracy applications. This equivalence doesn’t hold for higher accuracy applications where there will be a misalignment of approximately 1.6m.
In the short-term, to overcome the misalignment issue, state government web mapping environments will supply data explicitly as WGS 84 equivalent to GDA94 as this approach is intended to support the significant amount of data currently available in that format.
Need more information?
For more information on GDA2020 including fact sheets and transformation tools visit the ICSM website.
Please direct any queries regarding the South Australian Government’s implementation of GDA2020 to bradley.slape@sa.gov.au.
The Environment Protection Authority (EPA) has a number of air quality monitoring stations in metropolitan Adelaide, Whyalla, Port Augusta and Port Pirie.
The data collected from these sites is published monthly by the EPA on Data SA.
For daily air quality updates in South Australia, visit the EPA's website.
With the bushfire season upon us, it is important to learn how to minimise the effects from bushfire smoke until air quality improves. Follow the advice from SA Health.
Everyday cyber criminals steal people's online identities, which can be frustrating and exhausting to correct. Visit Stay Smart Online for tips on how to protect yourself.
The GovHack State awards have now commenced. The awards recognise and celebrate the achievements of GovHack competitors across Australia and New Zealand. Visit the GovHack website for all the award news.
A South Australian Government initiative to digitise paper forms and save an estimated 850,000 pieces of paper annually has been highlighted in the State of the data and digital nation report, released last week by the Australian Digital Council.
The initiative, launched in 2016, sees expert staff partner with SA Government agencies to help them turn inefficient paper forms into seamless online forms, making it easier for the community and businesses to engage with government services.
The State of the data and digital nation report showcases the progress of a number of other key digital and data initiatives underway across the nation, at both Commonwealth and State and Territory government levels. It highlights potential areas for collaboration between jurisdictions to improve government services for Australians.
To read the State of the data and digital nation report, visit the Department of the Prime Minister and Cabinet website.
To bring Australia’s coordinates in line with those from global satellite positioning systems, Australia will soon be changing to a new official national datum called the Geocentric Datum of Australia 2020 or GDA2020.
Preparations by the South Australian Government are in full swing, with work being done to transition systems and processes to support GDA and the associated Map Grid, MGA 2020.
It is anticipated that South Australian Government geospatial datasets will be available in GDA2020 in the first quarter of 2019.
Stay tuned for 2019 when a list of agencies delivering GDA2020 data becomes available.
It is anticipated that GDA94 datasets will continue to be available for 12 months after the delivery of GDA2020.
To learn more about GDA2020 visit the Intergovernmental Committee on Surveying and Mapping (ICSM) website.
On Wednesday 10 October 2018, the GovHack South Australia (SA) State Awards celebrated the best entries in this year’s open data hackathon.
The event was opened by Gail Fairlamb, Director of the Office for Digital Government, who also announced the winners of the awards sponsored by the Department of the Premier and Cabinet (DPC). The awards encouraged the use of open data to find creative ways to improve the lives of South Australians.
Congratulations to this year’s winners of the DPC GovHack awards:
More Jobs – Empowering South Australia
Winner: Xtra Jobs by XTRA
XTRA used a variety of data sets to develop an app. Xtra Jobs contains tools for individuals to assess their skills relating to desired career paths and identify training needs. The results can be used by both job seekers and recruiters to help improve employment opportunities in SA.
