Data

Streaky Bay - TMI grid (AWAGS)

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=78b0791f-c85a-4cad-b29b-ff785d980501&rft.title=Streaky Bay - TMI grid (AWAGS)&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/144985&rft.description=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 Streaky Bay - TMI grid (AWAGS) has a cell size of 0.0004 degrees (approximately 41m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 2018 by the SA Government, and consisted of 90670 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid.Maintenance and Update Frequency: notPlannedStatement: This Streaky Bay - TMI grid (AWAGS) is an airborne-derived Total Magnetic Intensity (TMI) grid for the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey. The survey was acquired under the project No. 1308 for the geological survey of SA. The grid has a cell size of 0.0004 degrees (approximately 41m). The units are in nanoTesla (or nT). A total of 90670 line-kilometres of data at a line spacing of 200m and 60m terrain clearance were acquired to produce this grid. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid (Milligan et al., 2009). This survey grid is essentially levelled to AWAGS. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134. Reference: Milligan, P.R., Minty, B.R.S., Richardson, M. & Franklin, R., 2009. The Australia-wide Airborne Geophysical Survey accurate continental magnetic coverage. Preview, No. 138, p. 1-128, Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=133.4888; southlimit=-32.6698; eastlimit=135.0116; northlimit=-31.4958; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=133.4888; southlimit=-32.6698; eastlimit=135.0116; northlimit=-31.4958; projection=GDA94 (EPSG:4283)&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=(c) Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 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=SA&rft_subject=survey 1308&rft_subject=AWAGS&rft_subject=GADDS2.0&rft_subject=TMI&rft_subject=magnetics&rft_subject=magnetism&rft_subject=palaeomagnetism&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=mag&rft_subject=total magnetic intensity&rft_subject=raster&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution 4.0 International Licence
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(c) Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020

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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 Streaky Bay - TMI grid (AWAGS) has a cell size of 0.0004 degrees (approximately 41m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 2018 by the SA Government, and consisted of 90670 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid.

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Maintenance and Update Frequency: notPlanned
Statement: This Streaky Bay - TMI grid (AWAGS) is an airborne-derived Total Magnetic Intensity (TMI) grid for the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey. The survey was acquired under the project No. 1308 for the geological survey of SA. The grid has a cell size of 0.0004 degrees (approximately 41m). The units are in nanoTesla (or nT). A total of 90670 line-kilometres of data at a line spacing of 200m and 60m terrain clearance were acquired to produce this grid. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid (Milligan et al., 2009). This survey grid is essentially levelled to AWAGS. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134. Reference: Milligan, P.R., Minty, B.R.S., Richardson, M. & Franklin, R., 2009. The Australia-wide Airborne Geophysical Survey accurate continental magnetic coverage. Preview, No. 138, p. 1-128, Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).

Created: 31 10 2020

Issued: 31 10 2020

Modified: 05 07 2021

Data time period: 21 06 2018 to 30 09 2018

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135.0116,-31.4958 135.0116,-32.6698 133.4888,-32.6698 133.4888,-31.4958 135.0116,-31.4958

134.2502,-32.0828

text: westlimit=133.4888; southlimit=-32.6698; eastlimit=135.0116; northlimit=-31.4958; projection=GDA94 (EPSG:4283)

Subjects
AWAGS | Australia | EARTH SCIENCES | Earth sciences | GADDS2.0 | NCI | Published_External | SA | TMI | airborne digital data | geophysical survey | geophysics | geoscientificInformation | grid | mag | magnetics | magnetism | palaeomagnetism | raster | survey 1308 | total magnetic intensity |

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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 Streaky Bay - TMI grid (AWAGS) (Streaky Bay - TMI grid (AWAGS) file download)

url : https://thredds.nci.org.au/thredds/fileServer/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc

NetCDF Subsetting Service (NCSS) for Streaky Bay - TMI grid (AWAGS) (Streaky Bay - TMI grid (AWAGS) NCSS)

url : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc/dataset.html

OPeNDAP web service for Streaky Bay - TMI grid (AWAGS) (Streaky Bay - TMI grid (AWAGS) OPeNDAP)

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc.html

OGC Web Mapping Service (WMS) for Streaky Bay - TMI grid (AWAGS) (Streaky Bay - TMI grid (AWAGS) WMS)

url : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc?service=WMS&version=1.3.0&request=GetCapabilities

OGC Web Coverage Service (WCS) for Streaky Bay - TMI grid (AWAGS) (Streaky Bay - TMI grid (AWAGS) WCS)

url : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc?service=WCS&version=1.0.0&request=GetCapabilities

Streaky Bay - TMI grid (AWAGS) NCSS

url : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc/dataset.html

Streaky Bay - TMI grid (AWAGS) OPeNDAP

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc.html

Streaky Bay - TMI grid (AWAGS) WMS

url : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc?service=WMS&version=1.3.0&request=GetCapabilities

Streaky Bay - TMI grid (AWAGS) WCS

url : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1308/P1308-grid-tmi-AWAGS_MAG_2019.nc?service=WCS&version=1.0.0&request=GetCapabilities

Identifiers
ACN 633 798 857