This service represents a combination of two data products, the DEM_SRTM_1Second dataset and the Australian_Bathymetry_Topography dataset. This service was created to support the CO2SAP (Co2 Storage application) Project to create a transect elevation graph within the application. This data is not available as a dataset for download as a Geoscience Australia product. The DEM_SRTM_1Second service represents the National Digital Elevation Model (DEM) 1 Second product derived from the National DEM SRTM 1 Second. The DEM represents ground surface topography, with vegetation features removed using an automatic process supported by several vegetation maps. eCat record 72759. The Australian_Bathymetry_Topography service describes the bathymetry dataset of the Australian Exclusive Economic Zone and beyond. Bathymetry data was compiled by Geoscience Australia from multibeam and single beam data (derived from multiple sources), Australian Hydrographic Service (AHS) Laser Airborne Depth Sounding (LADS) data, Royal Australian Navy (RAN) fairsheets, the General Bathymetric Chart of the Oceans (GEBCO) bathymetric model, the 2 arc minute ETOPO (Smith and Sandwell, 1997) and 1 arc minute ETOPO satellite derived bathymetry (Amante and Eakins, 2008). Topographic data (onshore data) is based on the revised Australian 0.0025dd topography grid (Geoscience Australia, 2008), the 0.0025dd New Zealand topography grid (Geographx, 2008) and the 90m SRTM DEM (Jarvis et al, 2008). eCat record 67703. IMPORTANT INFORMATION For data within this service that lays out of the Australian boundary the following needs to be considered. This grid is not suitable for use as an aid to navigation, or to replace any products produced by the Australian Hydrographic Service. Geoscience Australia produces the 0.0025dd bathymetric grid of Australia specifically to provide regional and local broad scale context for scientific and industry projects, and public education. The 0.0025dd grid size is, in many regions of this grid, far in excess of the optimal grid size for some of the input data used. On parts of the continental shelf it may be possible to produce grids at higher resolution, especially where LADS or multibeam surveys exist. However these surveys typically only cover small areas and hence do not warrant the production of a regional scale grid at less than 0.0025dd. There are a number of bathymetric datasets that have not been included in this grid for various reasons.

Layer 05-07 Base of Algebuckina Sandstone surface Surface produced for the Great Artesian Water Resource Assessment (GABWRA) by Geoscience Australia (http://www.ga.gov.au). This surface was created for 3D visualisation of the Base of Algebuckina Sandstone. The surface is available in the following formats 1. GOCAD surface (.ts) 2. ESRI grid 3. ASCII grid (.grd) Use limitations: 1. GOCAD surface requires program capable of reading GOCAD *.ts (triangulated surface) files 2. ASCII grid data requires re-interpolation by end-user resulting in minor differences to accompanying GOCAD *.ts surface This layer is part of a set comprised of: Layer 01 3-second Digital Elevation Model surface (catalogue #75990) Layer 02 Base of Cenozoic surface (catalogue #75991) Layer 03 Base of Mackunda Formation and equivalents surface (catalogue #76021) Layer 04 Base of Rolling Downs Group surface (catalogue #76022) Layer 05 Base of Hooray Sandstone and equivalents surface (catalogue #76023) Layer 06 Base of Injune Creek Group surface (catalogue #76024) Layer 07 Base of Hutton Sandstone surface (catalogue #76025) Layer 05-07 Base of Algebuckina Sandstone surface (catalogue #76952) Layer 08A Base of Evergreen and Marburg formations (catalogue #76026) Layer 08B Base of Poolowanna Formation (catalogue #76953) Layer 09 Base of Precipice Sandstone and equivalents surface (catalogue #76027) Layer 10 Base of Jurassic-Cretaceous sequence surface (catalogue #76028) This dataset and associated metadata can be obtained from www.ga.gov.au, using catalogue number 76952.

Layer 05 Base of Hooray Sandstone and equivalents surface Surface produced for the Great Artesian Water Resource Assessment (GABWRA) by Geoscience Australia (http://www.ga.gov.au). This surface was created for 3D visualisation of the Hooray Sandstone and Equivalents. The surface is available in the following formats 1. GOCAD surface (.ts) 2. ESRI grid 3. ASCII grid (.grd) Use limitations: 1. GOCAD surface requires program capable of reading GOCAD *.ts (triangulated surface) files 2. ASCII grid data requires re-interpolation by end-user resulting in minor differences to accompanying GOCAD *.ts surface This layer is part of a set comprised of: Layer 01 3-second Digital Elevation Model surface (catalogue #75990) Layer 02 Base of Cenozoic surface (catalogue #75991) Layer 03 Base of Mackunda Formation and equivalents surface (catalogue #76021) Layer 04 Base of Rolling Downs Group surface (catalogue #76022) Layer 05 Base of Hooray Sandstone and equivalents surface (catalogue #76023) Layer 06 Base of Injune Creek Group surface (catalogue #76024) Layer 07 Base of Hutton Sandstone surface (catalogue #76025) Layer 05-07 Base of Algebuckina Sandstone surface (catalogue #76952) Layer 08A Base of Evergreen and Marburg formations (catalogue #76026) Layer 08B Base of Poolowanna Formation (catalogue #76953) Layer 09 Base of Precipice Sandstone and equivalents surface (catalogue #76027) Layer 10 Base of Jurassic-Cretaceous sequence surface (catalogue #76028) This dataset and associated metadata can be obtained from www.ga.gov.au, using catalogue number 76023.

Survey Name: Tasmanian Tiers Datasets Acquired: Magnetics, Radiometrics and Elevation Geoscience Australia Project Number: P5003 Acquisition Start Date: 10/02/2021 Acquisition End Date: 02/04/2021 Flight line spacing: 200 m Flight line direction: East-West (090-270) Total distance flown: 33,019 line-km Nominal terrain clearance: 80 m Blocks: 5 Data Acquisition: Magspec Airborne Surveys Project Management: Geoscience Australia Quality Control: Geoscience Australia Dataset Ownership: Mineral Resources Tasmanian and Geoscience Australia Included in this release: 1. Point-located Data ASCII-column data with accompanying description and definition files. • Magnetics corrected i. Magnetic data with corrections for diurnal, IGRF, tie-levelling, micro-levelling. ii. Elevation data converted to geoidal values and a digital elevation model. • Radiometrics corrected i. Equivalent ground concentrations of radioelements with NASVD spectral filtering and standard IAEA processing. 2. Grids Gridded data in ERMapper (.ers) format (GDA2020, MGA55). • Total magnetic intensity (TMI). • TMI reduced to pole (RTP). • TMI RTP with first vertical derivative applied. • Dose rate (with NASVD and standard processing). • Potassium concentration (with NASVD, standard processing, 3D topographic correction). • Thorium concentration (with NASVD, standard processing, 3D topographic correction). • Uranium concentration (with NASVD, standard processing, 3D topographic correction). • Laser-derived digital elevation model (geoidal). • Radar-derived digital elevation model (geoidal). 3. Outlines (survey extents) • Polygon outlines showing the extent of each block and the entire survey in ArcGIS shapefile format (GDA2020, MGA55). 4. Reports • P5003_3D_topographic_correction_of_gamma_ray_data.pdf i. Details of the 3D topographic corrections applied to the radiometric data. • P5003_calibration_report_fixed_wing.pdf i. Details of the calibration performed on the fixed wing aircraft (block 1). • P5003_calibration_report_helicopter.pdf i. Details of the calibration performed on the helicopter (blocks 2-5). • P5003_operations_and_processing_report.pdf i. Summary of the data acquisition and processing. © Mineral Resources Tasmania, Government of Tasmania and Commonwealth of Australia (Geoscience Australia) 2021. With the exception of the Commonwealth Coat of Arms and where otherwise noted, this product is provided under a Creative Commons Attribution 4.0 International Licence. (http://creativecommons.org/licenses/by/4.0/legalcode).

Layer 10 Base of Jurassic-Cretaceous sequence surface Surface produced for the Great Artesian Water Resource Assessment (GABWRA) by Geoscience Australia (http://www.ga.gov.au). This surface was created for 3D visualisation of the Base of Jurassic-Cretaceous sequence The surface is available in the following formats 1. GOCAD surface (.ts) 2. ESRI grid 3. ASCII grid (.grd) Use limitations: 1. GOCAD surface requires program capable of reading GOCAD *.ts (triangulated surface) files 2. ASCII grid data requires re-interpolation by end-user resulting in minor differences to accompanying GOCAD *.ts surface. This layer is part of a set comprised of: Layer 01 3-second Digital Elevation Model surface (catalogue #75990) Layer 02 Base of Cenozoic surface (catalogue #75991) Layer 03 Base of Mackunda Formation and equivalents surface (catalogue #76021) Layer 04 Base of Rolling Downs Group surface (catalogue #76022) Layer 05 Base of Hooray Sandstone and equivalents surface (catalogue #76023) Layer 06 Base of Injune Creek Group surface (catalogue #76024) Layer 07 Base of Hutton Sandstone surface (catalogue #76025) Layer 05-07 Base of Algebuckina Sandstone surface (catalogue #76952) Layer 08A Base of Evergreen and Marburg formations (catalogue #76026) Layer 08B Base of Poolowanna Formation (catalogue #76953) Layer 09 Base of Precipice Sandstone and equivalents surface (catalogue #76027) Layer 10 Base of Jurassic-Cretaceous sequence surface (catalogue #76028) This dataset and associated metadata can be obtained from www.ga.gov.au, using catalogue number 76028. REFERENCES (Continued from Lineage field) 10. Passmore, V. L., T. U. Maung, et al. (1992). Gulf of Carpentaria petroleum prospectivity study. Record 1992/20. Australia, Bureau of Mineral Resources, Geology and Geophysics 11. Hawke, J. M. and J. N. Cramsie (1984). Contributions to the geology of the Great Australian Basin in New South Wales. Bulletin 31. Sydney. 12. Hinds, M. (2011). NSW Great Artesian Basin internal data set released to Geoscience Australia in 2011 by NSW Office of Water. Australia, New South Wales Office of Water. 13. Ransley and Smerdon (eds.) 2012. Hydrostratigraphy, hydrogeology and system conceptualisation of the Great Artesian Basin. CSIRO. Canberra. 14. Nelson GJ, Carey H, Radke BM and Ransley TR (2012). The three-dimensional visualisation of the Great Artesian Basin. A report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia.

Layer 02 Base of Cenozoic surface Surface produced for the Great Artesian Water Resource Assessment (GABWRA) by Geoscience Australia (http://www.ga.gov.au). This surface was created for 3D visualisation of the Base of Cenozoic sequence. It was used in Figure 3.1 of Ransley TR and Smerdon BD (eds) (2012) Hydrostratigraphy, hydrogeology and system conceptualisation of the Great Artesian Basin. A technical report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia. The surface is available in the following formats 1. GOCAD surface (.ts) 2. ESRI grid 3. ASCII grid (.grd) Use limitations: 1. GOCAD surface requires program capable of reading GOCAD *.ts (triangulated surface) files 2. ASCII grid data requires re-interpolation by end-user resulting in minor differences to accompanying GOCAD *.ts surface This layer is part of a set comprised of: Layer 01 3-second Digital Elevation Model surface (catalogue #75990) Layer 02 Base of Cenozoic surface (catalogue #75991) Layer 03 Base of Mackunda Formation and equivalents surface (catalogue #76021) Layer 04 Base of Rolling Downs Group surface (catalogue #76022) Layer 05 Base of Hooray Sandstone and equivalents surface (catalogue #76023) Layer 06 Base of Injune Creek Group surface (catalogue #76024) Layer 07 Base of Hutton Sandstone surface (catalogue #76025) Layer 05-07 Base of Algebuckina Sandstone surface (catalogue #76952) Layer 08A Base of Evergreen and Marburg formations (catalogue #76026) Layer 08B Base of Poolowanna Formation (catalogue #76953) Layer 09 Base of Precipice Sandstone and equivalents surface (catalogue #76027) Layer 10 Base of Jurassic-Cretaceous sequence surface (catalogue #76028) This dataset and associated metadata can be obtained from www.ga.gov.au, using catalogue number 75991. REFERENCES (Continued from Lineage field): 10. Senior D (1968) Durham Downs, Qld. 1:250 000 Geological Series, Bureau of Mineral Resources explanatory notes, SG/54-15. Australian Government Publishing Service Canberra. 11. Langford RP, Wilford GE, Truswell EM and Isern AR (1995) Palaeogeographic Atlas of Australia. Volume 10 - Cainozoic. Australian Geological Survey Organisation, Canberra. Available online: <https://www.ga.gov.au/resources/multimedia/animation/palaeo/html/palaeo.html> 12. Moussavi-Harami, R and Alexander, E., 1998 - Tertiary stratigraphy and tectonics, Eromanga Basin region. MESA Journal 8 (February 1998), 32-36p. 13. Hou, B., Fabris, A.J., Keling, J.L. & Fairclough, M.C., 2007 - Cainozoic palaeochannel-hosted uranium and current exploration methods, South Australia. MESA Journal 46 (September), 34-39. 14. Ransley and Smerdon (Eds) 2012. Hydrostratigraphy, hydrogeology and system conceptualisation of the Great Artesian Basin. CSIRO. Canberra. 15. Nelson GJ, Carey H, Radke BM and Ransley TR (2012). The three-dimensional visualisation of the Great Artesian Basin. A report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia. 16. Senior, B.R., 1978. The Whitula Formation, a new Tertiary stratigraphic unit. Appendix p 49-50 In Senior BR, Mond A and Harrison PL (1978) Geology of the Eromanga Basin. Bulletin 167. Bureau of Mineral Resources, Geology and Geophysics, Canberra. 17. Grimes KG (1980) The Tertiary geology of north Queensland. In: Henderson RA and Stephenson PJ (Eds) The Geology and Geophysics of Northeastern Australia. Geological Society of Australia, Queensland Division, Brisbane, 329-347. 18. Paten RJ (1964) The Tertiary geology of the Boulia region, western Queensland. Report 77. Bureau of Mineral Resources, Australia.

This web service delivers the geographical extents and descriptive metadata of geophysical datasets from all surveys conducted or managed by Geoscience Australia and its predecessor agencies, as well as from State and Territory geological survey agencies. Datasets include gravity, magnetic, radiometric, and electromagnetic data, and elevation data collected during geophysical surveys.

<p>The Northern Territory Geological Survey (NTGS) designed the Mount Peake-Crawford survey to provide high resolution magnetic, radiometric and elevation data in the area. It is anticipated that the data from the survey would help attract explorers into ‘greenfield’ terranes and contribute to the discovery of the next generation of major mineral and energy deposits in the Northern Territory. A total of 120,000 line km of regional data (200m line spacing) and additional infill data (100m line spacing), flown at 60m flight height were acquired during the survey between July and October 2019. The survey was managed by Geoscience Australia. <p>Various grids were produced from the Mount Peake-Crawford Airborne Magnetic and Radiometric Survey dataset and simultaneously merged into a single grid file. The final grid retains all of the information from the input data and is levelled to the national map compilations produced by Geoscience Australia. The merged grids have a cell size of 20m. <p>The following merged grids are available in this download: <p>• Laser-derived digital elevation model grids (m). Height relative to the Australian Height Datum. <p>• Radar-derived digital elevation model grids (m). Height relative to the Australian Height Datum. <p>• Total magnetic intensity grid (nT). <p>• Total magnetic intensity grid with variable reduction to the pole applied (nT). <p>• Total magnetic intensity grid with variable reduction to the pole and first vertical derivative applied (nT/m). <p>• NASVD-filtered potassium concentration grid (%). <p>• NASVD-filtered thorium concentration grid (ppm). <p>• NASVD-filtered uranium concentration grid (ppm).

This data set contains spatial data that represent the results of data worth analyses based on linear prediction uncertainty analysis and using the original GABtran groundwater flow model. Datasets with the suffix "increase" represent the data worth of observations calculated from their inclusion in a model calibration process. Datasets with the suffix "decrease" represent the data worth of observations calculated from their removal from a model calibration process. The remaining part of the filename indicates for which GABWRA reporting region the dataset relates. Projection information is in the file GABWRA.prj. Cell size is 5000m x 5000m 'No data' value is -9999 This data and metadata were produced by CSIRO for the Great Artesian Basin Water Resource Assessment. The data is used in figures 5.10-5.16 of Welsh WD, Moore CR, Turnadge CJ, Smith AJ and Barr TM (2012) "Modelling of climate and groundwater development. A technical report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment ". CSIRO Water for a Healthy Country Flagship, Australia. Projection is Albers equal area conic, with central meridian 143 degrees longitude, standard parallels at -21 and -29 degrees latitude and latitude of projection's origin at -25.

• Vertical datums are a foundational piece of the positioning puzzle that allows us make sense of height measurements - they make it possible to align height data by defining where all heights are zero. But when the vertical datum is unreliable, we lose perspective on which direction is down and this can cause strange things to happen. Water can appear to flow in the wrong direction or pool in unexpected places. • The Australian Height Datum (AHD) is the current, official, vertical datum in use in Australia. At 50 years old this year, it has stood the test of time well. But, it has a number of bumps and wrinkles (errors and distortions), relies on degrading physical infrastructure and was never intended to be used with modern positioning technology like GPS. The Australian Vertical Working Surface is a shiny new alternative vertical datum that doesn’t depend on any physical infrastructure, is free from the errors in the AHD and is designed to be directly compatible with GPS technology in the first instance.