eCPD - Upgrades to AGRS Webinar Series
Date & Time
Wednesday, 21 Aug 2019
- 1:00 pm
NOTE: This free webinar series was presented during 2019.
If you wish to just watch the recordings, we recommend visiting the ICMS website directly here. If however you wish to claim SSSI or BOSSI CPD points, then we recommend registering below.
The SSSI Young Professionals partnered with ICSM to present a four part lunchtime webinar series on upgrades to the Australian Geospatial Reference System (AGRS); the collection of datums, reference frames, models, infrastructure and standards needed for accurate 4D positioning.
The presenter was Nicholas Brown from Geoscience Australia. Nicholas is the Director of National Geodesy, Chair of the Permanent Committee on Geodesy and Australian Representative on FIG Commission 5. He is responsible for the development and refinement of the national coordinate reference frame, absolute gravimetry program, InSAR program and national geodesy products including geoid models. Nicholas has a Bachelor of Applied Science in Geomatics from RMIT and a Masters in Geophysics (Space Geodesy) from ANU.
Part 1: Upgrading the Australian Geospatial Reference System
The Australian Government has committed $225m to Geoscience Australia to provide 5-10 cm accurate positioning to anyone, anytime, anywhere in Australia by 2023. This is a significant improvement from the 5-10 m accuracy you can currently achieve using GPS enabled devices.
In anticipation for the growing use and reliance on positioning technology, the Intergovernmental Committee on Surveying and Mapping’s Permanent Committee on Geodesy (ICSM PCG) is leading the upgrade of a number of elements of Australia’s Geospatial Reference System to ensure Australian’s can maximise the benefits of precise positioning. The elements of the Australian Geospatial Reference Systems being upgraded include:
- static datum (from GDA94 to GDA2020)
- introduction of a time dependent reference frame (Australian Terrestrial Reference Frame)
- introduction of a new reference surface for heights (Australian Vertical Working Surface)
- improved geodetic infrastructure, and
- standards development to improve access and efficiency of geodetic data.
This first of four webinars on the Upgrading the Australian Geospatial Reference System will address questions like:
- What is Geodesy?
- What is the Geoscience Australia precise positioning program?
- What is the Australian Geospatial Reference System?
- What parts of the Australian Geospatial Reference System are being upgraded and why?
- Australian Terrestrial Reference Frame
- Australian Vertical Working Surface
- Standards – eGeodesy
Part 2: Geocentric Datum of Australia 2020
This webinar looked at some of the problems with the static datum, GDA94, and why it was no longer fit for purpose for some users. We also explained how the new static datum, GDA2020, was developed and provided an overview of the tools and products available to help implement GDA2020. This includes information about the GDA94 to GDA2020 transformation parameters, transformation grids, online tools, fact sheets, technical manuals and the AUSGeoid2020 model to convert GDA2020 ellipsoidal heights to Australian Height Datum heights.
Part 3: Australian Terrestrial Reference Frame 2014
Part 3 took things further and explained why Australia is introducing a time dependent reference frame; that is, a datum in which the coordinates of features will change with time due to the motion of the Australian tectonic plate (7 cm/yr). We described how the choice of using GDA2020 (static) and ATRF2014 (time-dependent) will be left up to the user and will dependent on the task. We discussed the emerging user base that need time dependent coordinates and the important role spatial professionals will play in providing end users with accurate positions. Finally we described how the International Terrestrial Reference Frame 2014, Australian Terrestrial Reference Frame 2014 and GDA2020 are linked.
Part 4: Height: Ellipsoid, geoid, Australian Height Datum and Australian Vertical Working Surface
The final part of the series provided an introduction to height transfer, ellipsoids, geoid, the Australian Height Datum (AHD) and the development of AUSGeoid2020. Furthermore, we introduced a new reference surface for heights in Australia; the Australian Vertical Working Surface (AVWS). We described how and when AVWS can be used and the benefits compared to AHD.
1.0 SSSI CPD Point per event
1.0 BOSSI CPD Point per event | Event codes: 1 - SSSIYP11320; 2 - SSSIYP11420; 3 - SSSIYP11520; 4 - SSSIYP11620
Note: to receive BOSSI points however, you must complete a questionnaire/s on the webinar/s. You will receive the link in your confirmation email.
Katie Le Miere