Data

Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer

Geoscience Australia
Geophysical Acquisition & Processing Section
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://rhe-ecat-prod01.prod.lan:8080/geonetwork/srv/eng/search?uuid=09fe798c-5326-4ebe-86af-03f4dfc9fb9d&rft.title=Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/143913&rft.description=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 Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer is a complete Bouguer anomaly grid for the Southern McArthur Basin Gravity Survey 2013 (P201381) survey. This gravity survey was acquired under the project No. 201381 for the geological survey of NT. The grid has a cell size of 0.00735 degrees (approximately 800m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 6278 gravity stations were acquired to produce this grid.Maintenance and Update Frequency: notPlannedStatement: This Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer is a spherical cap Bouguer anomaly grid for the Southern McArthur Basin Gravity Survey 2013 (P201381). This gravity survey was acquired under the project No. 201381 for the geological survey of NT. The grid has a cell size of 0.00735 degrees (approximately 800m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 6278 gravity stations were acquired to produce this grid. Three processes are required to correct the gravity observations for the effects of the surrounding topography: (1) a Bouguer correction (Bullard A), which approximates the topography as an infinite horizontal slab; (2) a correction to that horizontal slab for the curvature of the Earth (Bullard B); and (3) a terrain correction (Bullard C), which accounts for the undulations of the surrounding topography. The Spherical Cap Bouguer gravity anomalies were calculated by applying Bullard A and Bullard B corrections to the free air anomalies using a density of 2670 kg per cubic metre. These data were then gridded using the nearest neighbour algorithm from the INTREPID Geophysics software package. The processed data are checked by GA geophysicists using standard methods for assessing quality to ensure that the final data are fit-for-purpose. The final Spherical cap Bouguer anomalies grid contains data values which account for a correction due to the shape or curvature of the Earth, and provide a more accurate representation of crustal density variations beneath the Earth's surface. Details of the specifications of individual surveys held in the Australian National Gravity Database (ANGD) can be found in the Second Edition of the Index of Gravity Surveys (Wynne and Bacchin, 2009). References: Intrepid Geophysics, http://www.intrepid-geophysics.com; Wynne, P., and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=132.5389; southlimit=-17.0502; eastlimit=137.3375; northlimit=-14.9117; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=132.5389; southlimit=-17.0502; eastlimit=137.3375; northlimit=-14.9117; projection=GDA94 (EPSG:4283)&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=(c) Northern Territory of Australia (Northern Territory Geological Survey) 2020&rft_rights=Australian Government Security ClassificationSystem https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_subject=geoscientificInformation&rft_subject=EARTH SCIENCES&rft_subject=NCI&rft_subject=Earth sciences&rft_subject=geophysics&rft_subject=grid&rft_subject=Australia&rft_subject=NT&rft_subject=survey 201381&rft_subject=GADDS2.0&rft_subject=gravity&rft_subject=spherical cap&rft_subject=Bouguer&rft_subject=ground digital data&rft_subject=geophysical survey&rft_subject=grav&rft_subject=raster&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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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 Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer is a complete Bouguer anomaly grid for the Southern McArthur Basin Gravity Survey 2013 (P201381) survey. This gravity survey was acquired under the project No. 201381 for the geological survey of NT. The grid has a cell size of 0.00735 degrees (approximately 800m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 6278 gravity stations were acquired to produce this grid.

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Maintenance and Update Frequency: notPlanned
Statement: This Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer is a spherical cap Bouguer anomaly grid for the Southern McArthur Basin Gravity Survey 2013 (P201381). This gravity survey was acquired under the project No. 201381 for the geological survey of NT. The grid has a cell size of 0.00735 degrees (approximately 800m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 6278 gravity stations were acquired to produce this grid. Three processes are required to correct the gravity observations for the effects of the surrounding topography: (1) a Bouguer correction (Bullard A), which approximates the topography as an infinite horizontal slab; (2) a correction to that horizontal slab for the curvature of the Earth (Bullard B); and (3) a terrain correction (Bullard C), which accounts for the undulations of the surrounding topography. The Spherical Cap Bouguer gravity anomalies were calculated by applying Bullard A and Bullard B corrections to the free air anomalies using a density of 2670 kg per cubic metre. These data were then gridded using the nearest neighbour algorithm from the INTREPID Geophysics software package. The processed data are checked by GA geophysicists using standard methods for assessing quality to ensure that the final data are fit-for-purpose. The final Spherical cap Bouguer anomalies grid contains data values which account for a correction due to the shape or curvature of the Earth, and provide a more accurate representation of crustal density variations beneath the Earth's surface. Details of the specifications of individual surveys held in the Australian National Gravity Database (ANGD) can be found in the Second Edition of the Index of Gravity Surveys (Wynne and Bacchin, 2009). References: Intrepid Geophysics, http://www.intrepid-geophysics.com; Wynne, P., and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.

Created: 09 03 2020

Issued: 09 03 2020

Modified: 05 07 2021

Data time period: 14 10 2013 to 17 11 2013

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137.3375,-14.9117 137.3375,-17.0502 132.5389,-17.0502 132.5389,-14.9117 137.3375,-14.9117

134.9382,-15.98095

text: westlimit=132.5389; southlimit=-17.0502; eastlimit=137.3375; northlimit=-14.9117; projection=GDA94 (EPSG:4283)

Subjects
Australia | Bouguer | EARTH SCIENCES | Earth sciences | GADDS2.0 | NCI | NT | Published_External | geophysical survey | geophysics | geoscientificInformation | grav | gravity | grid | ground digital data | raster | spherical cap | survey 201381 |

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Other Information
The Geophysical Archive Data Delivery System (GADDS2) portal provides HTTP download of geophysics datasets in a number of formats. Point and line datasets are available in NetCDF and ASEG-GDF2. Grid datasets are available in NetCDF, GeoTIFF and ERS. (File available for download in various formats from the GADDS2 portal)

url : https://portal.ga.gov.au/persona/gadds

File download for Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer (Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer file download)

url : https://thredds.nci.org.au/thredds/fileServer/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc

NetCDF Subsetting Service (NCSS) for Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer (Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer NCSS)

url : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc/dataset.html

OPeNDAP web service for Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer (Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer OPeNDAP)

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc.html

OGC Web Mapping Service (WMS) for Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer (Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer WMS)

url : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc?service=WMS&version=1.3.0&request=GetCapabilities

OGC Web Coverage Service (WCS) for Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer (Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer WCS)

url : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc?service=WCS&version=1.0.0&request=GetCapabilities

Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer NCSS

url : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc/dataset.html

Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer OPeNDAP

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc.html

Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer WMS

url : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc?service=WMS&version=1.3.0&request=GetCapabilities

Southern McArthur Basin Gravity p201381 Spherical Cap Bouguer WCS

url : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P201381/P201381-grid-grv_scba.nc?service=WCS&version=1.0.0&request=GetCapabilities

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