Data

Streaky Bay - TMI RTP 1VD grid (AWAGS)

Name: Streaky Bay - TMI RTP 1VD grid (AWAGS)
Published: 2020

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=fd8e96e1-256f-4ebe-971f-7bdabc0eb711&rft.title=Streaky Bay - TMI RTP 1VD grid (AWAGS)&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/144988&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 RTP 1VD grid (AWAGS) is the first vertical derivative of the TMI RTP grid of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey.This grid has a cell size of 0.0004 degrees (approximately 41m) , and given in units of nT per metre (nT/m). The data used to produce the TMI 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. The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the TMI RTP grid of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. This grid shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The grid can also be used to locate structural features such as dykes.Maintenance and Update Frequency: notPlannedStatement: This Streaky Bay - TMI RTP 1VD grid (AWAGS) is the first vertical derivative grid of an airborne-derived Total Magnetic Intensity (TMI) Reduced to the Pole (RTP) 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. A total of 90670 line-kilometres of data at a line spacing of 200m were acquired to produce the TMI grid. The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the TMI RTP grid of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. The image shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The image can also be used to locate structural features such as dykes. 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. References Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition). Intrepid Geophysics http://intrepid-geophysics.com&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=133.4682; southlimit=-32.6723; eastlimit=135.0126; northlimit=-31.4851; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=133.4682; southlimit=-32.6723; eastlimit=135.0126; northlimit=-31.4851; 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=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=reduced to the pole&rft_subject=RTP&rft_subject=first vertical derivative&rft_subject=1VD&rft_subject=greyscale&rft_subject=image&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data

Access data via landing page
http://rhe-ecat-prod01...

Cite Saved to MyRDA Save to MyRDA

Licence & Rights:

Open Licence view details

Creative Commons Attribution 4.0 International Licence
http://creativecommons.org/licenses/

(c) Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020

Australian Government Security ClassificationSystem
https://www.protectivesecurity.gov.au/Pages/default.aspx

Access:

Open

Full 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 RTP 1VD grid (AWAGS) is the first vertical derivative of the TMI RTP grid of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey.
This grid has a cell size of 0.0004 degrees (approximately 41m) , and given in units of nT per metre (nT/m). The data used to produce the TMI 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. The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the TMI RTP grid of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. This grid shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The grid can also be used to locate structural features such as dykes.

Lineage

Maintenance and Update Frequency: notPlanned

Statement: This Streaky Bay - TMI RTP 1VD grid (AWAGS) is the first vertical derivative grid of an airborne-derived Total Magnetic Intensity (TMI) Reduced to the Pole (RTP) 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. A total of 90670 line-kilometres of data at a line spacing of 200m were acquired to produce the TMI grid. The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the TMI RTP grid of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. The image shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The image can also be used to locate structural features such as dykes. 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. References Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition). Intrepid Geophysics http://intrepid-geophysics.com

Created: 31 10 2020

Issued: 31 10 2020

Modified: 05 07 2021

Data time period: 21 06 2018 to 30 09 2018

This dataset is part of a larger collection

Click to explore relationships graph

text: westlimit=133.4682; southlimit=-32.6723; eastlimit=135.0126; northlimit=-31.4851; projection=GDA94 (EPSG:4283)

Subjects

User Contributed Tags

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 External Link

File download for Streaky Bay - TMI RTP 1VD grid (AWAGS) (Streaky Bay - TMI RTP 1VD 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_rtp_1vd-AWAGS_MAG_2019.nc External Link

NetCDF Subsetting Service (NCSS) for Streaky Bay - TMI RTP 1VD grid (AWAGS) (Streaky Bay - TMI RTP 1VD 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_rtp_1vd-AWAGS_MAG_2019.nc/dataset.html External Link

OPeNDAP web service for Streaky Bay - TMI RTP 1VD grid (AWAGS) (Streaky Bay - TMI RTP 1VD 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_rtp_1vd-AWAGS_MAG_2019.nc.html External Link

OGC Web Mapping Service (WMS) for Streaky Bay - TMI RTP 1VD grid (AWAGS) (Streaky Bay - TMI RTP 1VD 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_rtp_1vd-AWAGS_MAG_2019.nc?service=WMS&version=1.3.0&request=GetCapabilities External Link

OGC Web Coverage Service (WCS) for Streaky Bay - TMI RTP 1VD grid (AWAGS) (Streaky Bay - TMI RTP 1VD 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_rtp_1vd-AWAGS_MAG_2019.nc?service=WCS&version=1.0.0&request=GetCapabilities External Link

Streaky Bay - TMI RTP 1VD grid (AWAGS) NCSS

Streaky Bay - TMI RTP 1VD grid (AWAGS) OPeNDAP

Streaky Bay - TMI RTP 1VD grid (AWAGS) WMS

Streaky Bay - TMI RTP 1VD grid (AWAGS) WCS

Identifiers

URL : pid.geoscience.gov.au/dataset/ga/144988
global : fd8e96e1-256f-4ebe-971f-7bdabc0eb711