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

Survey Data captured after severe natural hazard events covering a range of hazards with specific attributes. This observational information is used as input data to assessing vulnerability to natural hazard, but is not made available in its raw form. <b>Value: </b>Used to assess impacts from natural disasters and thereby reduce future risks. <b>Scope: </b>Australia, data from Papua New Guinea, Indonesian province of West Sumatra (Padang) and New Zealand

Airborne electromagnetic (AEM) data measure variations in the conductivity of the ground by transmitting an electromagnetic signal from a system attached to a plane or helicopter. Depending on the AEM system used and the sub-surface conditions, AEM techniques can detect variations in the conductivity of the ground to a depth of several hundred metres. The responses recorded are commonly caused by the presence of electrically conductive materials such as salt or saline water, graphite, clays and sulphide minerals. <b>Value:</b> Data used for interpreting the geologic structure of the subsurface. This work can be used for the assessment of resource potential. <b>Scope:</b> Systematic coverage of large portions of the Australian continent.

The collection includes 17,247 measurements of temperature and temperature gradients collected down 5513 individual wells. This information formed the basis for the 'OZTemp Interpreted Temperature at 5km Depth' image of Australia <b>Value: </b>These observations are used to assess heat flow which can be used to infer deep geologic structure, which is valuable for exploration and reconstructions of Australia's evolution <b>Scope: </b>Nationwide collection corresponding to accessible boreholes and published measurements

This dataset contains all multibeam bathymetry data held by Geoscience Australia (GA) dating back to survey obtained since 1993. <b>Value: </b>Bathymetry data is used for a wide range of marine applications including: navigation, environmental assessment, jurisdictional boundaries, resource exploration. <b>Scope: </b>Data holdings lying within the offshore area of Australia, including international waters. <b> To access the AusSeaBed Marine Data Portal </b> use the following link: <a href="https://portal.ga.gov.au/persona/marine#/">https://portal.ga.gov.au/persona/marine#/</a>

Geoscience Australia is responsible for the records and custody of Commonwealth aerial photography, acquired since 1928 up to the most recent analogue film capture in mid-1990s. Subsequent comparable information is available in the form of satellite imagery or direct digital aerial image capture. The majority of the landmass of Australia is covered by black and white photography at 1:80,000 scale. The near complete coverage was undertaken three times, in 1950s, 1960s and 1980s. Metadata about aerial photo surveys is recorded as flight diagrams on 1:250,000, 1:100,000 & 1:50,000 maps showing the approximate aircraft flight paths, selective depiction of photo centres, and other survey parameters. <b>Value:</b> Aerial imagery can be used to study change over time for land use, vegetation, environmental quality, etc. <b>Scope: </b>Images in the collection have been acquired since 1928 up to the most recent analogue film capture in mid-1990s. Subsequent comparable information is available in the form of satellite imagery or direct digital aerial image capture. The majority of the landmass of Australia is covered by black and white photography at 1:80,000 scale. The near complete coverage was undertaken three times, in 1950s, 1960s and 1980s.

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.

Relatively little is known about what the seafloor of Australia's continental shelf looks like or has living on it. Geoscience Australia (GA), together with other partners, undertakes a range of marine surveys to improve our understanding and management of Australia's marine environments. One component of the research involves the collection of underwater imagery to directly observe and characterise coastal and deep sea habitats. In some regions these surveys build on existing baseline knowledge, but in many areas, particularly deep offshore locations, these surveys provide the first images of the seafloor. The imagery collection includes both still and video imagery collected using various systems, including towed platforms, remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs). Post-survey reports and metadata files are included as part of the collection, which describe further details of the surveys and respective imagery collections. The seafloor imagery provides a wealth of information about the geological features, habitats and life forms occurring throughout Australia's marine jurisdiction. <b>Value: </b>Improve the understanding and management of Australia's marine environments. <b>Scope: </b>GA surveys from 2007 onwards in waters around Australia and Australia's Antarctic Territory.

This collection includes Global Navigation Satellite System (GNSS) observations from long-term continuous or semi continuous reference stations at multiple locations across Australia and its external territories, including the Australian Antarctic Territory. <b>Value:</b> The datasets within this collection are provided on an openly accessible basis to support a myriad of scientific and societal positioning applications in Australia. These include the development and maintenance of the Australian Geospatial Reference System (AGRS); the densification of the International Terrestrial Reference Frame (ITRF); crustal deformation studies; atmospheric studies; and the delivery of precise positioning services to Australian businesses. <b>Scope: </b> Data from reference stations across Australia and its external territories, including the Australian Antarctica Territory. <b>Access: </b> To access the datasets and query station information visit the <a href="https://gnss.ga.gov.au./">Global Navigation Satellite System Data Centre</a>

The Geoscience Australia Rock Properties database stores the result measurements of scalar and vector petrophysical properties of rock and regolith specimens and hydrogeological data. Oracle database and Open Geospatial Consortium (OGC) web services. Links to Samples, Field Sites, Boreholes. <b>Value:</b> Essential for relating geophysical measurements to geology and hydrogeology and thereby constraining geological, geophysical and groundwater models of the Earth <b>Scope:</b> Data are sourced from all states and territories of Australia