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  • This data set provides outlines for the maximum spatial extent of seabed geomorphic units for Australia's Exclusive Economic Zone, including the offshore island territories, but excluding Australian Antarctic Territory. Twenty-one geomorphic feature types were identified and mapped, following definitions published by the International Hydrographic Office (IHO, 2001). <b>Value: </b>The geomorphology of the seabed is used to constrained surface geology of the sea floor, important in resource exploration, marine zone management and for understanding the physical environment <b>Scope: </b>The area covered includes the seafloor within the Australian marine jurisdiction surrounding the Australian mainland and island territories of Christmas, Cocos (Keeling), Macquarie, and Norfolk Islands (Heap & Harris 2008).

  • Descriptions of and measurements from field sites and samples from geological (including regolith) surveys. <b>Value: </b>Used to constrained surface geology, important in resource exploration and understanding physical environment. <b>Scope: </b>Mapping surveys mainly in Australia, but also in Antarctica, Oceania and south-east Asia.

  • Time series seismograph data recorded from Australian National Seismograph Network (ANSN) observatories in Australia, islands in the Pacific, Southern and Indian Ocean's and the Australian Antarctic Territory. <b>Value: </b>This data is used for earthquake monitoring, measurement, detection and location of earthquakes, which is valuable for emergency response, hazard modelling and mitigation. The dataset is also used to meet a subset of Australia's obligations to the Comprehensive Nuclear-Test-Ban Treaty Organisation (CTBTO) to fulfil Australia's commitment to nuclear explosion monitoring. <b>Scope: </b>Observatories in Australia, islands in the Pacific, Southern and Indian Ocean's and the Australian Antarctic Territory

  • Magnetotellurics (MT) is a passive geophysical method which uses natural time variations of the Earth's magnetic and electric fields to measure the electrical resistivity of the sub-surface. Electrical resistivity is a bulk property of a volume of Earth material and is associated with factors such as rock composition, porosity and permeability as well as temperature and pressure. The Magnetotelurics (MT) Data Collection includes datasets from The Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) and regional-scale MT surveys across the Australian continent. These data were collected by Geoscience Australia in collaboration with the State and Territory Geological Surveys and other partners. <b>Value: </b>Magnetotelluric data to expand the geoscientific understanding of the earth's lithospheric structure and provide new insights into Australia's onshore energy and mineral potential. <b>Scope: </b>AusLAMP is being conducted over multiple years to create a national MT dataset and map lithospheric structure of the Australian continent. MT data have also been acquired for mapping crustal structure and resource potential at regional scale. These data provide valuable information for multi-disciplinary interpretations. To view the magnetotellurics data via the Geoscience Australia internet page click on the following URL: <a href="https://www.ga.gov.au/about/projects/resources/regional-mt-program">https://www.ga.gov.au/about/projects/resources/regional-mt-program</a> For further information about the Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) click on the following URL: <a href="https://www.ga.gov.au/about/projects/resources/auslamp">https://www.ga.gov.au/about/projects/resources/auslamp</a>

  • The national standard lexicon of geologic units, including: age, lithology, geologic relationships for all Australian geological units, and a record of their use in literature. Links to Geological Provinces and Geological Maps. The collection is maintained by Geoscience Australia on behalf of the Australian Stratigraphy Commission, a standing committee of the Geological Society of Australia. <b>Value: </b>The lexicon standardises terminology for geologic units, thereby enabling integration of different geologic studies and datasets. <b>Scope: </b>Covers all Australian Territories, including Australia's Antarctic Territories. The database contains over 17,500 current stratigraphic names and over 36,000 variations, most of which are superseded, obsolete, or misspelt versions of the current names. The publicly accessible portion of this collection is made available through the Australian Stratigraphic Units Database (ASUD), the national authority on stratigraphic names in Australia and can be accessed here: <a href="https://pid.geoscience.gov.au/dataset/ga/21884">https://pid.geoscience.gov.au/dataset/ga/21884</a>

  • The national Tropical Cyclone Hazard Assessment (TCHA) defines the severe wind hazard posed to Australia based on the frequency and intensity of tropical cyclones making landfall around the Australian coastline. Contact us at hazards@ga.gov.au if you need further information. URL: https://www.ga.gov.au/about/projects/safety/tcha <b>Value: </b>The TCHA provides vital information to emergency managers, town planners and infrastructure owners to plan and reduce the threat of tropical cyclone hazard on the Australian coast, and for the insurance industry to understand the tropical cyclone risk as an input to pricing insurance premiums. The TCHA is a key data source to calculate local cyclone impact models for the development of evidence-based disaster management plans, evacuation plans or inform infrastructure planning or mitigation strategies. High risk areas can be identified and prioritised for further analysis, or to extract scenarios to explore risk mitigation and community safety at a local and regional level. The TCHA includes a catalogue of synthetic tropical cyclone events (including tracks and wind fields), hazard profiles for selected locations across Australia, and maps of annual recurrence interval (ARI) wind speeds due to tropical cyclones. Geoscience Australia provides essential evidence based information to government and emergency managers around Australia to improve our communities' ability to prepare for, mitigate against and respond to natural disasters. <b>Scope: </b>Continental scale.

  • This is a physical collection of photographic materials created by staff of Geoscience Australia (GA) and its predecessor organisations in the course of their work between the early 1920s and the early 21st century. <b>Value: </b>Historic and scientific significance. Many sites visited are remote and have rarely been revisited. Some images are of people from First Nations, flora and fauna of Australia, its territories and other countries. <b>Scope: </b> Geographical scope is largely Australia, pre- and post-Independence Papua New Guinea, and the Australian Antarctic Territory, but other countries and territories are represented. Thematic scope varies considerably, covering a diverse range of operations of a geological survey, including land and marine surveys, field installations, rock and fossil specimens (in situ, laboratory and under microscope), buildings, passport photographs, etc. The majority of the physical image collection (photos, negatives and glass plates) is still hardcopy only and stored in an access restricted room. This collection requires extensive work to develop a comprehensive catalogue of its contents and explore options for digitisation. <b>Queries can be directed to Records Management Unit (RMU) via the <a href="https://supportworkplace.ga.gov.au/CherwellPortal/Geoscience/">Support Workplace tool</a>. </b> More recent mages received from business area's and departing staff members have been digitised and are stored in HPRM folders: P14/50 - GA Image Collection (A20/615, A20/614, A20/598, A18/111) A spreadsheet containing metadata (D2019-4576) for these images (previously delivered via a now decommissioned database), can be viewed via the Download tab. Note: This HVC record is currently only visible to internal GA staff. <b>If anyone has any additional photographic collections that reflect the history of Geoscience Australia (or its predecessor organisations) the Records Management Unit would be very interested in chatting to you.</b>

  • Collection of Geoscience Australia's high-resolution elevation surveys collected using Light Detection and Ranging (LiDAR) and other instrument systems. <b>Value: </b>Describes Australia's landforms and seabed is crucial for addressing issues relating to the impacts of climate change, disaster management, water security, environmental management, urban planning and infrastructure design. <b>Scope: </b>Selected areas of interest around Australia.

  • The Topographic Position Index measures the topographic slope position of landforms by comparing the mean elevation of a specific neighbourhood area with the elevation value of a central cell. This is done for every cell or pixel in the digital elevation model (DEM) to derive the relative topographic position (e.g. upper, middle and lower landscape elements). Ruggedness informs on the roughness of the surface and is calculated as the standard deviation of elevations. Both these terrain components are used to generate a multi-scale topographic index over the Australian continent using the algorithm developed by Lindsay, J, B., Cockburn, J. M. H. and Russell, H. A. J., 2015. An integral image approach to performing multi-scale topographic position analysis, Geomorphology, 245, 51-61. Topographic position is captured across three spatial scale and display as a ternary image. The ternary image reveals a rich representation of nested landform features with broad application to geomorphological and hydrological process understanding and mapping of regolith and soils. <b>Value: </b>Broad application in understanding geomorphological and hydrological processes and in mapping regolith and soils over the Australian continent. Can be used as inputs into geospatial modelling and machine learning <b>Scope: </b>The dataset is national. The algorithm can be run on any digital elevation gridded dataset.

  • Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The gravity data collection contains both onshore and offshore data acquired on geophysical surveys conducted by Commonwealth, State & NT Governments and the private sector. <b>Value: </b>Gravity used to infer (model) the presence and position of different rock types in the subsurface. Used in resource assessment <b>Scope: </b>Australia continent and some data from marine surveys in region