AndreaBozzo/ceres-open-data-index huggingface dataset:
NETGOLD - Gladstone, 1985 (P784), magnetic line data, AWAGS levelled

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.
 These line dataset from the NETGOLD - Gladstone, 1985 survey were acquired in 1987 by the TAS Government, and consisted of 1778 line-kilometres of data at 125m 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, Published_External, TAS, airborne digital data, geophysical survey, geophysics, line, magnetic, magnetics, magnetism and palaeomagnetism, survey 784, vector
Organization: Geoscience Australia Data
Victoria River Downs 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 Unpublished maps are available as compilations.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-NT, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sk50-12)

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
AUSGeoid98 v.1.0 data files:  (sl54-04)

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
Australian fundamental gravity network 1991 and 1993 Absolute gravity measurements and Isogal station reconstruction Western Australia : operations report

This report describes gravity surveys conducted in Western Australia during 1991 and 1993, to establish new Absolute and Australian Fundamental gravity control stations in new areas and where existing fundamental gravity stations had been lost.

Tags: AU-WA, Earth Sciences, GA Publication, Published_External, Record, geophysics, gravity
Organization: Geoscience Australia Data
Mirnid 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
Darwin Harbour Habitat Mapping Program: Hard seabed layer

This resource contains a map of hard seabed (multibeam angular backscatter response derived product) for the greater Darwin Harbour region as part of a baseline seabed mapping program of Darwin Harbour and Bynoe Harbour. This project was funded through offset funds provided by an INPEX-led Ichthys LNG Project to the Northern Territory Government’s Department of Environment and Natural Resources (NTG-DENR) with co-investment from Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS). The intent of this program is to improve knowledge of the marine environments in the Darwin and Bynoe Harbour regions by collating and collecting baseline data that enable the creation of thematic habitat maps and information to underpin marine resource management decisions. The hard seabed map was derived from a compilation of multiple surveys undertaken by GA, AIMS and NTG-DENR between 2011 and 2017, including GA0333 (Siwabessy et al., 2015), GA0341 (Siwabessy et al., 2015), GA0351/SOL6187 (Siwabessy et al., 2016), GA4452/SOL6432 (Siwabessy et al., 2017), GA0356 (Radke et al., 2017), and GA0358 and GA0359 (Radke et al., 2018), adding to those from a previous survey GA0333 collected by GA, AIMS and NTG-DENR.

Tags: Backscatter, Exclusive Economic Zone, Marine Environmental Baselines, Marine Survey, Published_External
Organization: Geoscience Australia Data
Mode of emplacement of the Papuan Ultramafic Belt: a discussion

Connelly (1979) states: "Geological and geophysical evidence from a number of studies has established that the Papuan Ultramafic Belt is probably an overthrust sheet of oceanic crust and mantle with a thicker crustal section than normal oceanic crust". This hypothesis was first advanced by Thompson in 1957 (see Davies, 1971), and worked out in more detail by Davies (1968, 1971) and Davies and Smith (1971). In 1973 I presented an alternate interpretation of the Papuan Ultramafic Belt. I quote here from the ANZAAS (1973) abstract: "The interpretation advanced and illustrated by cross sections explains the Papuan ultramafic belt as a deeply eroded portion of an uplifted, extinct, west to southwest dipping subduction zone which - after subduction activity ceased in Late Eocene to Oligocene time - rose to the surface and was squeezed out along a major pre-existing shear zone. Owing to the rapid rising of at least 20 kilometres and the concomitant strong erosion of the sprouting orogenic belt, fragments of the oceanic crust and upper mantle from the ancestral subduction zone are now exposed at the surface and form the Papuan ultramafic belt".

Tags: Earth Sciences, GA Publication, Journal, PNG, Published_External
Organization: Geoscience Australia Data
Spiral Arm Seismic Arrays

Seismic arrays have many uses for signal enhancement, from surface wave characterisation of the near surface to teleseismic detection in the context of monitoring nuclear tests. Many variants of the geometrical configuration of stations have been used with the object of maximising potential resolution of the direction of arrival of incoming wavefronts.
A versatile class of array configurations, with good resolution properties, can be constructed with multiple spiral arms.  The array response is comparable to the samenumber of full circles but with far fewer stations, and robust to minor position changes in emplacement.
The desirable properties of the spiral arm arrays are illustrated for a permanent array in the Precambrian Pilbara craton in northwestern Australia, and a temporary array on ancient sediments in southern Queensland, Australia.
In each case the practical array response is very good and matches the theoretical expectations.
The spiral arm configuration allows the deployment of relatively large aperture arrays with a limited number of stations, which is advantageous in a broad range of seismic applications including near-surface characterisation.

Tags: Earth Sciences, External Publication, Published_External
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sc50-08)

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
Lake Eyre 1:250 000 topographic map

This map is part of the series that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5 km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. Each standard map covers an area of 1.5 degrees longitude by 1 degree latitude or about 150 kilometres from east to west and 110 kilometres from north to south. There are about 50 special maps in the series and these maps cover a non-standard area. Typically, where a map produced on standard sheet lines is largely ocean it is combined with its landward neighbour. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours (interval 50m), localities and some administrative boundaries. The topographic map and data index shows coverage of the sheets. Product Specifications Coverage: The series covers the whole of Australia with 513 maps. Currency: Ranges from 1995 to 2009. 95% of maps have a reliability date of 1994 or later. Coordinates: Geographical and either AMG or MGA (post-1993) Datum: AGD66, GDA94, AHD. Projection: Universal Traverse Mercator (UTM) Medium: Paper, flat and folded copies.

Tags: 250K scale, AU-SA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
GSWA Naretha Eucla Basin 3 Doserate 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. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered terrestrial dose rate grid.
This GSWA Naretha Eucla Basin 3 Doserate Grid Geodetic has a cell size of 0.00042 degrees (approximately 43m) and shows the terrestrial dose rate of the Naretha, WA, 2009 (Eucla Basin 3). The data used to produce this grid was acquired in 2009 by the WA Government, and consisted of 124870 line-kilometres of data at 200m line spacing and 50m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, K, NASVD, NCI, Published_External, Th, U, WA, airborne digital data, dose, dose rate, gamma-ray, geophysical survey, geophysics, grid, potassium, rad, radiometrics, raster, rate, spectrometry, survey 1210, thorium, uranium
Organization: Geoscience Australia Data
Malgar 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
Regolith Map of Australia Edition 1- Digital

The Regolith Map of Australia 1:5M scale dataset (2013 edition) is a seamless but partial national coverage of regolith-landform units, compiled for use at, or between 1:5 million, and 1:1 million scale.  The data maps high-level regolith-landform units.  The units appear as polygon geometries, and with attribute information identifying high-level regolith and landform nomenclatures and their hierarchy.
The 2013 dataset is a completely new portrayal of Australia's regolith from that presented much earlier in 1986, in which a whole of continent view of Australia's regolith was based on a simpler desktop-based 1:5 million continental regolith terrain assessment, not directly linked with landforms and published by the Bureau of Mineral Resources Geology and Geophysics. The 2013 edition incorporates new published mapping in South Australia (2012), integrated with earlier field-based regolith-landform mapping data from the Northern Territory (2006) and later Queensland (2008).  The attribute structure of the new dataset  is also revised to be more compatible with the GeoSciML data standard, published by the IUGS Commission for Geoscience Information.
The map data is compiled largely from simplifying and edge-matching of  1:250 000 scale regolith compilation maps.  Some source regolith and geologic maps ranging in scale from 1:50 000 to 1:1 million were used together with LANDSAT7, radiometric, magnetics, and gravity imagery, in addition to a 9 second digital elevation model.

Tags: AU-NT, AU-QLD, AU-SA, DC2020, Earth Sciences, GIS, HVC_144616, Published_External, Regolith Map, geomorphology, landforms, mineral exploration, regolith
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sj57-07)

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
P904tmivd1g

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 P904tmivd1g is a first vertical derivative of the Total Magnetic Intensity grid for the SMMSP - AEM - Billabong Creek, NSW, 2001.
This grid has a cell size of 0.00042 degrees (approximately 42m). The grid has units of nanoTesla per km (or nT/km). The data used to produce the TMI grid was acquired in 2001 by the NSW Government, and consisted of 5522 line-kilometres of data at 200m line spacing and 120m terrain clearance. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid.

Tags: 1vd, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, NSW, Published_External, airborne digital data, first vertical derivative, geophysical survey, geophysics, grid, mag, magnetics, magnetism, palaeomagnetism, raster, survey 904
Organization: Geoscience Australia Data
Towards automated mapping of depth to magnetic/gravity basement - examples using new extensions to an old method

The Euler method of automating depth to source from potential field data has undergone resurgence in popularity, with several new extensions to the method developed. Perhaps the most revolutionary of these provides a solution of the structural index as part of the inversion process. Previously, structural index was a required input parameter. Many solutions are generated with the Euler method, and care is used to select the most appropriate. In some cases, accuracies of depth estimates within Â±15% of depth of actual source below acquisition height are achieved. Examples of Euler depth results from across three representative areas of Australia are used to demonstrate the utility of the method. Data are presented by several methods, including full 3D visualisation, which allows the solutions to be integrated with other data and inversion results. A depth-to-basement map of the Springvale 1:250 000 map sheet area in Queensland has previously been generated using the Naudy technique, and those results provide a useful comparison with depths derived using the Euler method. A small area in the eastern Yilgarn, Western Australia, contains an elongated sedimentary basin overlying shallow basement cross-cut by numerous dykes and faults. The magnetic expression of basement can be traced from near-surface to a few hundred metres depth under basin cover. This is a good test of the method for providing estimates along the incline from outcrop to increasing thickness of cover. Basement to the eastern Gawler Craton (Olympic sub-domain) lies under several hundred metres of cover, and Euler depth estimates for this area are also examined.

Tags: Earth Sciences, External Publication, Published_External, Scientific Journal Paper
Organization: Geoscience Australia Data
Precambrian Palaeolatitudes for Australia

Palaeolatitudes for Precambrian Australia were last reported in 1988. A serious limitation at that time was the sparseness of palaeomagnetic data. While the Australian Precambrian still lacks palaeomagnetic data on the whole, two intervals within it have since become much better defined. These are the late Palaeoproterozoic to earliest Mesoproterozoic and late the Mesoproterozoic to middle Neoproterozoic. Improvements to the former resulted from multidisciplinary studies in the 1990s by AGSO to provide a geological framework for mineral exploration in northern Australia; improvements to the latter are largely due a quest led by the University of Western Australia to determine the configuration of the late Proterozoic supercontinent Rodinia. This report incorporates the improvements in data for an update on Australian Precambrian palaeolatitudes.

Tags: AU, Earth Sciences, Published_External, Report, mineral deposits
Organization: Geoscience Australia Data
Bathymetry of Australia video

This video is a flythrough around the coast of Australia shows the major topographic features of the seafloor around the continent. Starting in the south west the viewer can see the continental shelf and slope of the southern coast followed by the seamount chains and the Great Barrier Reef to the east. Continuing around the north then west coast the eastern end of the Java Trench is shown before returning to Perth and pulling out to show the whole continent. The bathymetry is shown at x12 exaggeration and uses a modern colour ramp. Video length 2min 30 sec.

Tags: Bathymetry, EARTH SCIENCES, EDUCATION, Educational Product, Fly through, Published_External, video
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Wilcannia (sh54-16)

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