AndreaBozzo/ceres-open-data-index huggingface dataset:
Application of terrain corrections in Australia (2001)

A set of recommendations for application of automated terrain correction of gravity anomalies in Australia.
Recent improvements in position and elevation determinations due to Differential GPS have led to substantial improvements in the accuracy and precision of observed gravity data, and a general renaissance in the use of gravimetry in Australia. Increasingly, users of the data are specifying levels of precision in derived measurements such as the Bouguer Anomaly, that reflect only these positioning improvements without considering topographic effects on precision. The consequence has been that most gravity data routinely submitted to the National Gravity Database are Simple Bouguer Anomalies only, and contain a range of unquantifiable acquisition noise that degrades the quality of the overall dataset. This paper briefly describes the principles behind the terrain correction of observed gravity data, and outlines one method of rapidly calculating the value of a 'first pass' terrain correction for gravity values in Australia. This method makes use of the widely available 9 second Digital Elevation Model of Australia and the IntrepidTM geophysical software package developed jointly by the Australian Geological Survey Organisation and Des Fitzgerald &amp; Associates. The assumptions and pitfalls behind this particular method are also described. A comparison between the Intrepid method and traditional Hammer-chart manual methods is described using a test dataset from northern Tasmania. The comparison shows that the IntrepidTM method is suitable for applying coarse corrections using the generally available DEM. However, the limitations of the DEM itself prevent use in extreme topographic situations, where a more detailed DEM is needed. Overall, in Australian conditions, the method should prove practical. Finally, test data are also provided on an ftp site to allow users to test their own terrain correction algorithms.

Tags: Earth Sciences, GA Publication, Other Publication, Published_External, gravity
Organization: Geoscience Australia Data
Muckadilla 1:100 000 unpublished topographic map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Tags: 100K unpublished, AU-QLD, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
GSNSW Exploration NSW Area H Cargelligo Narrandera 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 0.00049 degrees (approximately 50m) and shows uranium element concentration of the NSW DMR, Discovery 2000, Cargelligo/Narrandera, AREA H, 1995 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 123700 line-kilometres of data at 250m line spacing and 60m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, NCI, NSW, Published_External, U, airborne digital data, gamma-ray, geophysical survey, geophysics, grid, rad, radiometrics, raster, spectrometry, survey 738, uranium
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Manuka (sf54-08)

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
Birrindudu - Browns Range Dome NT, 1997 (P1001), 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 Birrindudu - Browns Range Dome NT, 1997 (P1001), radiometric line data, AWAGS levelled were acquired in 1997 by the NT Government, and consisted of 81828 line-kilometres of data at a line spacing between 200m and 400m, 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, NT, Published_External, airborne digital data, gamma-ray, geophysical survey, geophysics, line, potassium, radiometrics, spectrometry, survey 1001, thorium, uranium, vector
Organization: Geoscience Australia Data
Rock property data (densities and magnetic susceptibilities) for hand sample and drill core specimens in the Tanami region

Density and magnetic susceptibility measurements were taken from 254 rock samples in the Tanami region to provide rock property constraints during modelling. Multiple measurements were taken for each rock type, in each geological package, in order to provide a statistically representative sample for each package. The samples covered a large geographic portion of the model area, to account for any regional variations in rock properties. Samples selected for measurement were confined to rocks of the Tanami basement and the Birrindudu Group platform cover. Three rock sample datasets were accessed and consist of: Bureau of Mineral Resources (BMR) drill core collected during reconnaissance mapping of the Tanami Region in the early seventies (Blake, 1974) in order to penetrate cover and sample basement rock; NTGS hands samples collected as part their Tanami region project; and NTGS drill core collected as part their Tanami region project.

Tags: AU-NT, AU-WA, Data Package, Earth Sciences, Geothematic, Published_External, dataset, geophysics, gravity, magnetics
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Kingoonya (sh53-11)

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
GSQ Hodgkinson Georgetown Block B 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 0.00048 degrees (approximately 52m) and shows uranium element concentration of the Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init. in units of parts per million (or ppm). The data used to produce this grid was acquired in 1999 by the QLD Government, and consisted of 102900 line-kilometres of data at 200m 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 798, uranium
Organization: Geoscience Australia Data
GSWA Carnarvon Basin North Elevation Grid Geodetic

Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This GSWA Carnarvon Basin North Elevation Grid Geodetic is elevation data for the Carnarvon Basin North, WA, 2011. This survey was acquired under the project No. 1234 for the geological survey of WA. The grid has a cell size of 0.00083 degrees (approximately 89m).  This grid contains the ground elevation relative to the geoid for the Carnarvon Basin North, WA, 2011. It represents the vertical distance from a location on the Earth's surface to the geoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

Tags: Australia, DEM, EARTH SCIENCES, Earth sciences, Elevation, GADDS2.0, NCI, Published_External, WA, digital data, geoid, geophysical survey, geophysics, grid, raster, survey 1234, terrain
Organization: Geoscience Australia Data
Trans 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
Australian Geomagnetic Reference Field 2025 Revision (AGRF25)

AGRF25 is a regional magnetic field model for Australia covering the interval 2020-2030.&nbsp;
The Australian Geomagnetic Reference Field (AGRF) is a set of numerical models of the geomagnetic field for Australia and near-neighbouring regions. It represents a combination of the Earth's main field originating from the core and the broad-scale crustal field. AGRF describes the geomagnetic field on a regional scale, intermediate between the global scale of the International Geomagnetic Reference Field (IGRF) and the local scale provided by detailed ground and aeromagnetic surveys.

Included with the dataset is evaluation software:
README.TXT:&nbsp;This text file of information

AGRF25S.FOR: Source code of a main program for generating AGRF25 values
&nbsp;&nbsp;&nbsp;&nbsp;at a sequence of single sites. The program may also be used to
&nbsp;&nbsp;&nbsp;&nbsp;generate values of the International Geomagnetic Reference Field,&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;revision 14 for epochs after 2025.0

AGRF25S.EXE: A Windows console application of program AGRF25S

AGRF25G.FOR: Source code of a main program for generating AGRF25 values
&nbsp;&nbsp;&nbsp;&nbsp;for a single field element on a latitude-longitude grid at&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;a constant altitude

AGRF25G.EXE: A Windows console application of program AGRF25G

AGRF25LB.FOR: Source code for subroutines called by the main programs.

COEF25:&nbsp;&nbsp;A data file of model coefficients and parameters.

GRID2GEO.FOR: Source code of a program to convert Universal Transverse
&nbsp;&nbsp;&nbsp;&nbsp;Mercator Easting and Northings to geodetic latitude and longitude

GRID2GEO.EXE: A Windows console application of GRID2GEO

GEO2GRID.FOR: Source code of a program to convert geodetic latitude and&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;longitude to UTM Easting and Northings

GEO2GRID.EXE: A Windows console application of GEO2GRID

SPHEROID.TXT: A text data file of geodetic spheroid parameters,&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;used by GRID2GEO and GEO2GRID

Tags: 2025, Magnetism and Palaeomagnetism, Published_External, geomagnetism, magnetic field
Organization: Geoscience Australia Data
Mount Stuart 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
Rainworth 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
Investigation of soil thickness along route of Woden-Stromlo water main, ACT 1966

Geological and seismic traverses were conducted, and augering was done, along the route of the Woden-Stromlo Water Main, with the purpose of estimating the thickness of soil and weathered bedrock - collectively termed soil - that is soft enough to be excavated by trenching equipment. Ekperience in similar work has Shown that this thickness is indicated approximately by the depth to which the power auger used in the investigation is capable of drilling.
The seismic velocities of the soil and underlying material can be related, empirically, to their amenability to mechanical excavation. Material with a seismic velocity greater than.5000 feet per second is generally too hard to excavate without some blasting.
The geological estimate, made during a brief reconnaissance along the route of the water main, is based on the commonly observed depths of weathering of the bedrock.
The estimates of soil thickness obtained by the three methods are generally in reasonable agreement. Locally, the auger stopped at shallow depths, presumably where it encountered hard rock fragments or boulders in the soil. At some localities the seismic results were indefinite, and the final estimate of soil thickness was based on results of augering.

Tags: AU-ACT, Earth Sciences, GA Publication, Published_External, Record, geology
Organization: Geoscience Australia Data
Marram 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-SA, Orthophoto Map, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sb50)

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
Glenroy 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
AUSGeoid98 v.1.0 data files:  (sj53-02)

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
Acknowledging and Understanding Variability in Simulating Bushfires, Part 1 - Evaluation of FireDST against the Kilmore fire of 7 Feb 2009

GA record by Geoscience Australia relating to the research findings for the F.I.R.E- D.S.T project - specifically relating to Case Study One (Kilmore 2009). Project deliverable 4.1.5 Part 1 of 3 parts

Tags: Earth Sciences, GA Publication, Published_External, Record
Organization: Geoscience Australia Data
Fanny Cove 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
EL8180, EL8177, EL7777, EL8431 Gravity Traverses 1965, NT (P196580), 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 EL8180, EL8177, EL7777, EL8431 Gravity Traverses 1965, NT (P196580) contains a total of 299 point data values acquired at a spacing between 400 and 1100 metres. The data is located in NT and were acquired in 1965, under project No. 196580 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 196580
Organization: Geoscience Australia Data
Culliban 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-QLD, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data