AndreaBozzo/ceres-open-data-index huggingface dataset:
A short user guide for UBC-GIF gravity and magnetic inversions

Obtaining reliable predictions of the subsurface will provide a critical advantage for explorers seeking mineral deposits at depth and beneath cover. A common approach in achieving this goal is to use deterministic property-based inversion of potential field data to predict a 3D subsurface distribution of physical properties that explain measured gravity or magnetic data. The non-uniqueness of inversions of potential field data mandates careful and consistent parameterization of the problem to ensure realistic solutions. Including all prior geological knowledge as constraints on the inversion also helps ensure that the recovered predictions are consistent with both the geophysical data and the geological knowledge. 
We review how potential field inversions are best applied for mineral exploration problems using the UBC-GIF inversion algorithms. We use examples to emphasise the importance of mesh design and applying appropriate data processing, and identify the approach for defining key parameters such as data uncertainty, potential field weighting functions, and numerical parameters that approximate prior geological knowledge of in situ trends, geometries and properties. Consistent application of these techniques will ensure the most reliable predictive physical property models for explorers.

Tags: 3D model, Abstract, Earth Sciences, External Publication, Published_External, geology, geophysics, gravity, magnetics
Organization: Geoscience Australia Data
Australia-wide Total Intensity Variability

Using data from the six Australian continental magnetic observatories, a contour display of the rate-of-change of magnetic total intensity, F, over the continent is shown below. This provides a broad view of how F changes across Australia. The units shown on the contours are in nanoTesla per hour. The grey squares indicate the locations of the magnetic observatories. Both real-time and historic data can be displayed in this format. All maps are generated from a period of 15 minutes of observatory data and available at 15 minute intervals.

Tags: AU, Application, Earth Sciences, National dataset, Published_External
Organization: Geoscience Australia Data
Adavale Basin: 1D burial and thermal history modelling

The Adavale Basin is located approximately 850 km west-northwest of Brisbane and southwest of Longreach in south-central Queensland. The basin system covers approximately 100,000 km2 and represents an Early to Late Devonian (Pragian to Famennian) depositional episode, which was terminated in the Famennian by widespread contractional deformation, regional uplift and erosion. 
Burial and thermal history models were constructed for nine wells using existing open file data to assess the lateral variation in maturity and temperature for potential source rocks in the Adavale Basin, and to provide an estimate of the hydrocarbon generation potential in the region.

Tags: AFER, Adavale Basin, Australia's Future Energy Resources, Devonian, EFTF – Exploring for the Future, Published_External, Resource geoscience, burial history, petroleum systems modelling, thermal history
Organization: Geoscience Australia Data
Redbluff Detailed Gravity Survey, NT. (P199219), 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 Redbluff Detailed Gravity Survey, NT. (P199219) contains a total of 873 point data values acquired at a spacing between 40 and 320 metres. The data is located in NT and were acquired in 1992, under project No. 199219 for None.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, NT, Published_External, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 199219
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Coober Pedy (sh53-06)

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
Nyabing 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-WA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Organochlorine contamination of groundwater by pulp and paper mill effluent in South Australia

In June 1989, a contaminated private well was identified close to a drain which carries pulp and paper mill effluent to Lake Bonney, in the southeast of South Australia. Investigations over a period of two-and-half years involving the construction of 25 investigation wells in three stages were carried out. The initial stage confirmed that the drain was the source of the problem. The results of sampling at seven discreet sites indicated that there is one site with extensive groundwater contamination (the site where the problem was first identified), and one site with significant contamination close to Lake Bonney.  At the site with extensive contamination it is concluded that the upper 10 m of the local unconfined aquifer is contaminated. The actual extent of the plume is at least 900 m parallel with the drain and at least 250 m away from the drain. Contaminants identified include the organochlorine solvents chloroform, tetrachloroethylene and trichloroethylene, as well as other compounds typical of pulp mill effluent.  The hydraulic relationship between the drain and groundwater was investigated and this confirmed that the areas where contamination was found were those with the highest pollution potential on hydraulic grounds.  lt is apparent that there has been no serious impact on beneficial use of the groundwater resource, although one farmer has had to replace two stock supply wells.  The pulp and paper mill is close to completion of a major redevelopment, including installation of a chemical recovery process. A consequence of this is that most of the pollutants are now being burnt. Over the last three years, the mill has also changed from chlorine bleaching to a peroxide process, which has eliminated the bulk of the organochlorines in the effluent.  Organochlorine solvents are still used as cleaning agents, but alternatives are being actively sought.  A number of options for management of the problem ranging from basic monitoring to remediation of the hot spot are discussed.

Tags: Earth Sciences, GA Publication, Journal, Published_External, SA
Organization: Geoscience Australia Data
The Carboniferous and Permo-Triassic igneous rocks of the Mossman four mile sheet area, North Queensland

This report summarizes field observations of the Carboniferous and Permo-Triassic rocks in the Mossman Sheet 4-mile sheet area during the 1960 field season. Also included in the main text is the more important petrographic information gained from microscopic study of the specimens collected.

Tags: AU-QLD, Earth Sciences, GA Publication, Published_External, Record, geology
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sc52-11)

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
SMMSP - MagSpec - Angas Bremer Plains, SA, 2002 (2002/01) (P909), radiometric line data, AWAGS levelled

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). 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 SMMSP - MagSpec - Angas Bremer Plains, SA, 2002 (2002/01) (P909), radiometric line data, AWAGS levelled were acquired in 2002 by the SA Government, and consisted of 7535 line-kilometres of data at 100m line spacing and 60m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

Tags: AWAGS, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, Published_External, SA, airborne digital data, gamma-ray, geophysical survey, geophysics, line, potassium, radiometrics, spectrometry, survey 909, thorium, uranium, vector
Organization: Geoscience Australia Data
Francis 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: AU-NT, Orthophoto Map, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Digital Earth Australia Hotspots WFS

The Digital Earth Australia Hotspots web service has been developed as part of the Digital Earth Australia Hotspots national bushfire monitoring system. The service delivers hotspot data derived from (a growing number of) satellite-born instruments that detect light in the thermal wavelengths. The colour of the spot represents the time the Hotspot was last observed by a passing satellite (e.g. 0-2 hours). The colour does not indicate severity. Typically, the satellite data are processed with a specific algorithm that highlights areas with an unusually high temperature. In principle, however, Hotspots may be sourced from non-satellite sources.
Lineage (for eCatID 101800 and 101780): The Sentinel Hotspots system was originally developed in 2010. The Sentinel Hotspots webservice was republished in 2016 as part of a platform upgrade. The Digital Earth Australia Hotspots system and webservices was redeveloped in 2019 as part of a platform upgrade.

Tags: Earth Sciences, Himawari-8, Hotspots, Landsat, MODIS, NOAA, Published_External, Satellite, Suomi NPP, WFS, bushfire monitoring, web service
Organization: Geoscience Australia Data
Yalgoo, WA, 2014 (P1269), 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 Yalgoo, WA, 2014 survey were acquired in 2015 by the WA Government, and consisted of 126967 line-kilometres of data at a line spacing between 100m and 200m, and 50m terrain clearance.

Tags: Australia, DEM, EARTH SCIENCES, Earth sciences, Elevation, GADDS2.0, Published_External, WA, airborne digital data, geophysical survey, geophysics, line, survey 1269, terrain, vector
Organization: Geoscience Australia Data
Magnetic prospecting at Tennant Creek, Northern Territory, 1935-37

The geophysical surveys described in this report were performed during 1935-1937 by the Aerial, Geological and Geophysical Survey of Northern Australia, but the results were not fully published at that time. As mining development has shown that the Tennant Creek Field, originally considered as a goldfield only, now has possibilities as a base metal field, it was considered desirable that the leading features of the surveys and the results thereof be presented in a unified report. The report is confined mainly to geophysical aspects and refers only to the detection of magnetic bodies. Three types of anomaly were observed, and are classified as minor, major and regional. The minor anomalies appear to be of little significance, and the surveyed areas were not large enough to completely delineate the regional anomalies, which are almost certainly associated with the regional geology. The major-type anomalies are well suited to interpretation by theoretical methods. A method of interpretation based on polarization by induction has been applied to these anomalies, and testing performed to date indicates that this method shows the position of the body causing an anomaly with sufficient -accuracy for the siting of an exploratory drill hole. In general, a reasonable estimate can be made also of the extent in depth of the body. More complete evaluation of the magnetic results would 'be assisted by accurate delineation and interpretation of the regional anomalies. An airborne magnetometer survey, with this object in view, has recently been completed by the Bureau and should give valuable information on the structure and limits of the field. Illustrations are presented showing contour maps of most of the major anomalies, and, for the most important areas, observed magnetic profiles are shown alongside profiles based on theoretically determined dimensions of the bodies causing the anomalies. Four appendices give details of the mathematics involved in the method of interpretation which has been adopted.

Tags: AU-NT, Bulletin, Earth Sciences, GA Publication, Published_External, magnetics
Organization: Geoscience Australia Data
GSQ Kingaroy Mackay Qld ppm uranium grid geodetic

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). 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 radiometric uranium grid has a cell size of 0.00096 degrees (approximately 101m) and shows uranium element concentration of the Kingaroy, Qld, 1995-1996, AIRDATA in units of parts per million (or ppm). The data used to produce this grid was acquired in 1995 by the QLD Government, and consisted of 34102 line-kilometres of data at 400m line spacing and 80m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, NCI, Published_External, QLD, U, airborne digital data, gamma-ray, geophysical survey, geophysics, grid, rad, radiometrics, raster, spectrometry, survey 791, uranium
Organization: Geoscience Australia Data
NT P1268 Dunmarra Thorium Grid Geodetic

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). 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 radiometric thorium grid has a cell size of 0.00083 degrees (approximately 91m) and shows thorium element concentration of the Dunmarra, NT, 2014 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2014 by the NT Government, and consisted of 104017 line-kilometres of data at 400m line spacing and 80m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, NCI, NT, Published_External, Th, airborne digital data, gamma-ray, geophysical survey, geophysics, grid, rad, radiometrics, raster, spectrometry, survey 1268, thorium
Organization: Geoscience Australia Data
Weebo 1:100 000 unpublished 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.

Tags: 100K unpublished, AU-WA, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
National Base Land Parcels (May 2023)

Land Parcels are a spatial representation of cadastral parcels defined by the State and Territory governments of Australia. Land Parcels aggregates the complex representations unique to each jurisdiction into a consistent, seamless representation of the cadastral fabric of Australia.
Australian cadastral parcels represent the smallest legal area of land capable of sale without further approval to subdivide. These parcels can be referenced by a Land Title which offers the opportunity to link to jurisdictional information that can include: the certificate of title or crown lease, valuation information, land descriptions and more, through the State’s or Territory’s Land Registry.
National Base Land Parcels (the Data) is available to Commonwealth Government users of the Digital Atlas of Australia. Contact DigitalAtlas@ga.gov.au for access.

Tags: Cadastre, Digital Atlas of Australia, Foundation, Land Parcels, Land Use and Environmental Planning, Property, Published_External
Organization: Geoscience Australia Data
Engineering models to inform risk mitigation strategies

The Risk and Impact Analysis Group (RIAG) at Geoscience Australia (GA) in Canberra is a multidisciplinary research team. Their key role is to develop knowledge on the risk from natural and human-caused hazards for input to policy and operational decision makers for the mitigation of risk to Australian communities. The RIAG achieves this through the development of computational methods, models and decision support tools that assess the hazard, vulnerability and risk posed by hazards. The RIAG also works with other agencies to develop and collect information on natural disasters that is essential for developing valid risk models for forecasting the impact of future hazard events. The Group includes hazard experts, numerical modellers, engineers, economists, and GIS specialists.
This paper will discuss the risk analysis process used at GA, with a particular focus on the vulnerability component. Earthquake and tsunami risk examples will highlight technical aspects of the work and step through the risk analysis framework that has been adopted. 
The method being used to develop vulnerability models for the wind and tsunami hazard is an engineering model approach. The method requires a generalised hazard definition, an engineering model of a particular structure, and a costing module to calculate the real cost of repairs. The initial focus will be Australian residential structures. The engineering model is based on the assumption that connection failure is the primary initiator of structural failure in residential structures (as opposed to say, a beam or wall stud failing in bending). It also assumes that component failures can be aggregated up into overall damage scenarios. The engineering model employs a Monte Carlo simulation approach that allows for the incorporation of variability (in connection strengths, building orientation, opening sizes, and key hazard parameters). The engineering model approach also allows the opportunity to investigate mitigation options through strengthening structural components.
The multi-hazard risk approach used at GA is a move towards being able to make informed decisions on how to manage the risk from natural hazards. This paper has presented examples of computational natural hazard risk with a particular focus on the development of engineering vulnerability models.
Presented at the International Forum on Engineering Decision Making, 12th to 15th Dec, 2007, Port Stephens, NSW.

Tags: EARTH SCIENCES, Mitigation, Published_External, Vulnerability
Organization: Geoscience Australia Data