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>

The capture and processing of aerial lidar and coincident imagery products is required for the Nulla Basalt Geological Province in the upper Burdekin catchment of north Queensland. The Nulla Basalt Province project is the second of a series of high resolution elevation data acquisition projects required to support Geoscience Australia’s Exploring for the Future programme focussed on northern Australia. Products created in the project will primarily be used for high precision modelling of surface water movement across the landscape, identification of potential interactions with ground water resources in the region and modelling of structural geology from subtle surface expression of fault line steps indicative of historical seismic events.

This is a collection of aerial photography captured from 5 November 2010 to 29 March 2012 and coinciding with a low-water tide occurrence for the purpose of defining the low-water coastline of Tasmania.

A `weighted geometric median' approach has been used to estimate the median surface reflectance of the barest state (i.e., least vegetation) observed through Landsat-8 Operational Land Image (OLI) observations from 2013 to September 2018 to generate a six-band Landsat-8 Barest Earth pixel composite mosaic over the Australian continent. The bands include BLUE (0.452 - 0.512), GREEN (0.533 - 0.590), RED, (0.636 - 0.673) NIR (0.851 - 0.879), SWIR1 (1.566 - 1.651) and SWIR2 (2.107 - 2.294) wavelength regions. The weighted median approach is robust to outliers (such as cloud, shadows, saturation, corrupted pixels) and also maintains the relationship between all the spectral wavelengths in the spectra observed through time. The product reduces the influence of vegetation and allows for more direct mapping of soil and rock mineralogy. Reference: Dale Roberts, John Wilford, and Omar Ghattas (2018). Revealing the Australian Continent at its Barest, submitted. <b>Value: </b>Has broad application in mapping surface geochemistry and mineralogy of exposed soil and bedrock. Has applications in geological mapping and natural resource management including mapping of soil characteristics. <b>Scope: </b>Two enhanced bare earth products have been generated reflecting different Landsat satellites and acquisition periods. The first only uses Landsat 8 observations from 2013 to 2018. The second incorporates the full 30+ year archive combining Landsat 5, 7, and 8 from 1986 to 2018.