AndreaBozzo/ceres-open-data-index huggingface dataset:
AUSGeoid98 v.1.0 data files:  (sk49-04)

AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use your own interpolation software, or you can use Geoscience Australia's Windows Interpolation software (Winter). The data files are text files in a standard format that cover the same area as standard topographic map areas. Files covering both 1:250,000 (approximately 100 x 150 km) and 1:1,000,000 (approximately 400 x 600 km) map areas are available. There is a 4 minute overlap on all sides of each area. Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places. AUSGeoid98 deflections of the vertical were computed from the geoid-ellipsoid separation surface, while the AUSGeoid93 deflections of the vertical were computed from OSU91A.

Tags: AU, AUSGeoid98, Geodesy, Geodetic Data, Published_External, dataset, geodesy
Organization: Geoscience Australia Data
Developing an Optimal Spatial Predictive Model for Seabed Sand Content Using Machine Learning, Geostatistics, and Their Hybrid Methods

Seabed sediment predictions at regional and national scales in Australia are mainly based on bathymetry-related variables due to the lack of backscatter-derived data. In this study, we applied random forests (RFs), hybrid methods of RF and geostatistics, and generalized boosted regression modelling (GBM), to seabed sand content point data and acoustic multibeam data and their derived variables, to develop an accurate model to predict seabed sand content at a local scale. We also addressed relevant issues with variable selection. It was found that: (1) backscatter-related variables are more important than bathymetry-related variables for sand predictive modelling; (2) the inclusion of highly correlated predictors can improve predictive accuracy; (3) the rank orders of averaged variable importance (AVI) and accuracy contribution change with input predictors for RF and are not necessarily matched; (4) a knowledge-informed AVI method (KIAVI2) is recommended for RF; (5) the hybrid methods and their averaging can significantly improve predictive accuracy and are recommended; (6) relationships between sand and predictors are non-linear; and (7) variable selection methods for GBM need further study. Accuracy-improved predictions of sand content are generated at high resolution, which provide important baseline information for environmental management and conservation.
Citation: Li, J.; Siwabessy, J.; Huang, Z.; Nichol, S. Developing an Optimal Spatial Predictive Model for Seabed Sand Content Using Machine Learning, Geostatistics, and Their Hybrid Methods. Geosciences 2019, 9, 180. https://doi.org/10.3390/geosciences9040180

Tags: EARTH SCIENCES, Published_External, acoustic multibeam data, machine learning, model selection, predictive accuracy, spatial predictions, spatial predictive model, variable importance, variable selection
Organization: Geoscience Australia Data
Seismicity in the southwest of Western Australia

In the Cities Project Perth, GA is developing a multi-hazard risk assessment of the Perth metropolitan area. One of the main objectives of the Project is to develop an earthquake hazard and risk model for this area. The hazard model is developed using informaiton about earthquakes, the geology and the local soil characteristics of the region. As part of this process, we will develop several earthquake scenarios with events originating at specific locations in the region. To define an appropriate model of seismicity, the Cities Project initiated an expert debate to discuss and to formulate geological and seismological parameters for the Southwest Seismic Zone and the area around Perth. The debate was followed by a workshop in December 2002 in Canberra where the seismicity model of SW WA was ultimately defined. Further discussion was held following the workshop, culminating in an agreed seismicity model for the region.

Tags: AU-WA, Earth Sciences, GA Publication, Published_External, Record, seismology
Organization: Geoscience Australia Data
Helicopter Gravity SA, WA (P197004), gravity point data

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 This Helicopter Gravity SA, WA (P197004) contains a total of 29 point data values acquired at a spacing between 3000 and 5000 metres. The data is located in SA, WA and were acquired in 1970, under project No. 197004 for Bureau of Mineral Resources (BMR).

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, SA, WA, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 197004
Organization: Geoscience Australia Data
Tomingley 1:25,000 regolith-landform map CRC LEME

The Tomingley 1:25,000 regolith-landform map illustrates the distribution of regolith materials and the landforms on which they occur, described using the RTMAP scheme developed by Geoscience Australia

Tags: 25K scale, AU-NSW, Geological Map, Geology, Published_External, landforms, regolith
Organization: Geoscience Australia Data
Geochemistry of Precambrian metapelites from East Antarctica: secular and metamorphic variations

Early Archaean ( &gt;3 b.y. old) metapelites from the Napier Complex of East Antarctica are enriched in MgO and depleted in K2O and Rb compared with late Archaean and Proterozoic metapelites, probably reflecting a higher proportion of mafic to ultramafic material and sodic (tonalitic to granodioritic) felsic igneous rocks in the source. A number of the more magnesian are strongly depleted in Cr, Ni, Cu, and V, and may have been formed by metamorphism of sediments derived from hydrothermally altered mafic or ultramafic igneous rocks. There is evidence for metamorphic depletion of Rb relative to K in these high-temperature granulite facies metapelites, many of which have high K/Rb ratios, and for depletion of U relative to Th in granulite-facies metapelites compared with those of amphibolite facies. The unique occurrence, on a regional scale, of assemblages containing sapphirine + quartz, and osumilite in metapelites of the Napier Complex may be due to their unusual chemical compositions, as well as to exceptionally high temperatures of metamorphism (900-950Â°C). Such assemblages are found only in the more magnesian rocks (mostly with mg &gt; 0.6) in the Napier Complex, whereas younger metapelites are, with few exceptions, relatively iron-rich. Nevertheless, regional high-grade metamorphism with geothermal gradients sufficiently steep to allow formation of these rare assemblages is likely to have been confined to the Archaean.

Tags: AAT, Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
Pinjarra 1:250 000 GIS Dataset

This data is part of the series of maps that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. 
Data is downloadable in various distribution formats.

Tags: 250K scale, AU-WA, Earth Sciences, GIS Dataset, Published_External, dataset, topography
Organization: Geoscience Australia Data
Clarence Winnathee Gravity (P196835), gravity point data

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 This Clarence Winnathee Gravity (P196835) contains a total of 467 point data values acquired at a spacing between 1000 and 1800 metres. The data is located in NSW and were acquired in 1968, under project No. 196835 for Clarence River Basin Oil Exploration NL.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, NSW, Published_External, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 196835
Organization: Geoscience Australia Data
Wellington 1 100k magnetic grid geodetic

Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
This Wellington 1 100k magnetic grid geodetic has a cell size of 0.00042 degrees (approximately 43m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1991 by the NSW Government, and consisted of 63636 line-kilometres of data at a line spacing between 200m and 400m, and 100m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, NSW, Published_External, TMI, airborne digital data, geophysical survey, geophysics, grid, mag, magnetics, magnetism, palaeomagnetism, raster, survey 569, total magnetic intensity
Organization: Geoscience Australia Data
Ouyen 1:100 000 topographic map

At this scale 1cm on the map represents 1km on the ground. Each map covers a minimum area of 0.5 degrees longitude by 0.5 degrees latitude or about 54 kilometres by 54 kilometres. The contour interval is 20 metres. Many maps are supplemented by hill shading. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours, localities and some administrative boundaries. Product Specifications Coverage: Australia is covered by more than 3000 x 1:100 000 scale maps, of which 1600 have been published as printed maps. Unpublished maps are available as compilations. Currency: Ranges from 1961 to 2009. Average 1997. Coordinates: Geographical and either AMG or MGA coordinates. Datum: AGD66, GDA94; AHD Projection: Universal Transverse Mercator UTM. Medium: Printed maps: Paper, flat and folded copies. Compilations: Paper or film, flat copies only.

Tags: 100K scale, AU-VIC, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Evidence and timing of crustal extension versus shortening in the early tectonothermal evolution of a Proterozoic continental rift sequence at Broken Hill, Australia

Low-pressure (P) high-temperature (T) metamorphism previously attributed to crustal thickening accompanying nappe emplacement in the Paleoproterozoic Willyama Supergroup at Broken Hill is reinterpreted as a response to crustal extension (D1) and bimodal magmatism commencing circa 1700 Ma. D1 deformation occurred under amphibolite-granulite facies conditions, producing layer-parallel fabrics (S1) and metapelitic mineral assemblages in which andalusite dominated over sillimanite. Crustal extension ceased soon after 1640 Ma to be followed by crustal thickening, higher-pressure metamorphism, and northeast vergent recumbent folding (D2) attendant on inversion of the original D1 extensional structures. D2 recumbent folding has previously gone unrecognized but probably peaked around 1600 Ma before further amphibolite facies metamorphism between 1600 and 1590 Ma accompanying upright folding and northwest directed thrust faulting (D3). In the light of this revised tectonothermal history, geodynamic models erected to explain elevated thermal gradients and low-P-high-T granulite facies metamorphism in tectonically thickened crust may not be as relevant to Broken Hill as once thought. Above average crustal temperatures and low-P-high-T metamorphism in the Willyama Supergroup more likely occurred in response to voluminous magmatic intrusion accompanying crustal thinning, mantle upwelling and emplacement and unroofing of midcrustal rocks along a major detachment surface. A second major structural and/or stratigraphic break in the Willyama Supergroup is indicated by the absence of D1 fabrics from the uppermost part of the sequence.

Tags: AU-NSW, Earth Sciences, External Publication, Published_External, Scientific Journal Paper
Organization: Geoscience Australia Data
Attack Creek 1:50 000 topographic map

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

Tags: 50K scale, AU-NT, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Ngururrpa Gravity Survey P201560 Complete Spherical Cap Bouguer Anomaly 267GU

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
This Ngururrpa Gravity Survey P201560 Complete Spherical Cap Bouguer Anomaly 267GU is a complete spherical cap Bouguer anomaly grid for the Ngururrpa Gravity Survey (P201560). This gravity survey was acquired under the project No. 201560 for the geological survey of WA. The grid has a cell size of 0.00466 degrees (approximately 500m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 4965 gravity stations were acquired to produce this grid.

Tags: Australia, Bouguer, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, WA, complete, geophysical survey, geophysics, grav, gravity, grid, ground digital data, raster, spherical cap, survey 201560
Organization: Geoscience Australia Data
Beta 1:50 000 topographic map

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

Tags: 50K scale, AU-WA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Cooper Basin North, Qld, 2008 (P1176), elevation line data

The Digital Elevation Model represents ground surface topography between points of known elevation. The elevation data was calculated using the altimeters and Global Positioning System (GPS) sensor used for the benefit of airborne magnetic and radiometric data on the same survey. The elevation is the height relative to the Australian Height Datum GDA94 (AUSGEOID09). The processed elevation data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 These line dataset from the Cooper Basin North, Qld, 2008 survey were acquired in 2008 by the QLD Government, and consisted of 168416 line-kilometres of data at 400m line spacing and 60m terrain clearance.

Tags: Australia, DEM, EARTH SCIENCES, Earth sciences, Elevation, GADDS2.0, Published_External, QLD, airborne digital data, geophysical survey, geophysics, line, survey 1176, terrain, vector
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sl56-07)

AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use your own interpolation software, or you can use Geoscience Australia's Windows Interpolation software (Winter). The data files are text files in a standard format that cover the same area as standard topographic map areas. Files covering both 1:250,000 (approximately 100 x 150 km) and 1:1,000,000 (approximately 400 x 600 km) map areas are available. There is a 4 minute overlap on all sides of each area. Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places. AUSGeoid98 deflections of the vertical were computed from the geoid-ellipsoid separation surface, while the AUSGeoid93 deflections of the vertical were computed from OSU91A.

Tags: AU, AUSGeoid98, Geodesy, Geodetic Data, Published_External, dataset, geodesy
Organization: Geoscience Australia Data
Camooweal deep crustal reflection seismic survey, QLD, 2019: Stacked and migrated seismic data and images for line 19Q-C1, 19Q-C2 and 19Q-C3

The Camooweal 2D seismic survey was conducted in 2019 by the Geological Survey of Queensland (GSQ). This survey was funded by the Queensland Government's Strategic Resources Exploration Program. The survey's primary aim was to improve understanding of basin architecture underlying the Camooweal area – the Isa Superbasin, South Nicholson Basin and Georgina Basin and also to evaluate the energy, mineral and groundwater potential of North West Queensland.
The seismic survey comprised three lines totalling 300 km in length. The survey ties into the 1994 Mount Isa seismic survey, 2019 Barkly seismic survey and 2017 South Nicholson seismic survey and is close to the western end of the 2006 Mount Isa seismic survey. 
Dayboro Geophysical Pty Ltd carried out the data processing and Geoscience Australia undertook the quality control of the data processing. A copy of the seismic dataset provided by the processing contractor was released by GSQ in February 2020. Geoscience Australia prepared the metadata, images and SEGY files for pre-migration stacks, pre-stack time and depth migration stacks and post-stack migration data. The images and SEGYs are derived from SEGY files released by GSQ. The zipped package is available for download.

Tags: Camooweal Seismic Survey, Camooweal Seismic Survey 2019, Geophysics, Published_External, Seismic, Seismology and Seismic Exploration
Organization: Geoscience Australia Data
Historical Aerial Photography Information Hub

This Hub contains information, resources and discovery of Commonwealth Historical Aerial Photography across Australia. Geoscience Australia has developed the Historical Aerial Photography (HAP) collection in an online data delivery system. Using the application, uses can search and download the commonwealth photography collection for free. The hub demonstrates the breadth of the collection and showcases the efforts in collecting and curating an extensive physical collection of film and documents.
Geoscience Australia has the most extensive historical aerial photography collection in terms of land coverage and time (from 1928-1996). This online catalogue provides means of easy search of the collection records. The mapping system allows users to understand what information is available and, if digitised, to preview and download the image data.
The application contains a map which users can search areas, current location or an area of interest, as well as customize the search criteria (date range, film number etc). The search results list the available aerial photography or flight line diagram, and if is available for direct download for free.

Tags: Australia, EARTH SCIENCES, HVC 144649, HVC_144649, National Dataset, Published_External, Satellite Imagery
Organization: Geoscience Australia Data
GA Landsat 8 OLI/TIRS Analysis Ready Data Collection 3

BACKGROUND

The United States Geological Survey's (USGS) Landsat satellite program has been capturing images of the Australian continent for more than 30 years. This data is highly useful for land and coastal mapping studies. 
In particular, the light reflected from the Earth’s surface (surface reflectance) is important for monitoring environmental resources – such as agricultural production and mining activities – over time. 
We need to make accurate comparisons of imagery acquired at different times, seasons and geographic locations. However, inconsistencies can arise due to variations in atmospheric conditions, sun position, sensor view angle, surface slope and surface aspect. These need to be reduced or removed to ensure the data is consistent and can be compared over time.  
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WHAT THIS PRODUCT OFFERS

GA Landsat 8 OLI/TIRS Analysis Ready Data Collection 3 takes Landsat 8 imagery captured over the Australian continent and corrects for inconsistencies across land and coastal fringes. The result is accurate and standardised surface reflectance data, which is instrumental in identifying and quantifying environmental change. 

The imagery is captured using the Operational Land Imager (OLI) and Thermal Infra-Red Scanner (TIRS) sensors aboard Landsat 8.

This product is a single, cohesive Analysis Ready Data (ARD) package, which allows you to analyse surface reflectance data as is, without the need to apply additional corrections. 

It contains three sub-products that provide corrections or attribution information:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1) GA Landsat 8 OLI/TIRS NBAR Collection 3 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2) GA Landsat 8 OLI/TIRS NBART Collection 3
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3) GA Landsat 8 OLI/TIRS OA Collection 3

The resolution is a 30 m grid based on the USGS Landsat Collection 1 archive.

Tags: DEA, EARTH SCIENCES, Earth observation, Landsat, Published_External, analysis ready data, observation attributes, satellite imagery, surface reflection
Organization: Geoscience Australia Data