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GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic

Name: GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic
Published: 2020

Geoscience Australia

Geophysical Acquisition & Processing Section

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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=99c7a7c1-30ff-43de-9363-0a36a49b3c16&rft.title=GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/141818&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 GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic is a first vertical derivative of the Total Magnetic Intensity grid for the Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init..This grid has a cell size of 0.00048 degrees (approximately 52m). The grid has units of nanoTesla per km (or nT/km). The data used to produce the TMI 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. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid.Maintenance and Update Frequency: notPlannedStatement: This GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic is a first vertical derivative grid of the Total Magnetic Intensity (TMI) anomaly for the Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init.. The survey was acquired under the project No. 798 for the geological survey of QLD. A total of 102900 line-kilometres of data at a line spacing of 200m and 80m terrain clearance were acquired to produce the TMI grid. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Total Magnetic Intensity grid of the Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init. survey to produce this grid. This grid was calculated using an 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 grid has a cell size of 0.00048 degrees (approximately 52m). The grid has units of nanoTesla per km (or nT/km). The first vertical derivative grid is very helpful for the enhancement of near surface features and structural features such as faults and 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: Intrepid Geophysics, http://www.intrepid-geophysics.com; Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=143.9652; southlimit=-18.0409; eastlimit=145.5808; northlimit=-16.9614; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=143.9652; southlimit=-18.0409; eastlimit=145.5808; northlimit=-16.9614; projection=GDA94 (EPSG:4283)&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=(c) Geological Survey of Queensland 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=QLD&rft_subject=survey 798&rft_subject=GADDS2.0&rft_subject=magnetics&rft_subject=first vertical derivative&rft_subject=magnetism&rft_subject=palaeomagnetism&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=mag&rft_subject=1vd&rft_subject=raster&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data

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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 GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic is a first vertical derivative of the Total Magnetic Intensity grid for the Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init..
This grid has a cell size of 0.00048 degrees (approximately 52m). The grid has units of nanoTesla per km (or nT/km). The data used to produce the TMI 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. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid.

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Maintenance and Update Frequency: notPlanned

Statement: This GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic is a first vertical derivative grid of the Total Magnetic Intensity (TMI) anomaly for the Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init.. The survey was acquired under the project No. 798 for the geological survey of QLD. A total of 102900 line-kilometres of data at a line spacing of 200m and 80m terrain clearance were acquired to produce the TMI grid. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Total Magnetic Intensity grid of the Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init. survey to produce this grid. This grid was calculated using an 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 grid has a cell size of 0.00048 degrees (approximately 52m). The grid has units of nanoTesla per km (or nT/km). The first vertical derivative grid is very helpful for the enhancement of near surface features and structural features such as faults and 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: Intrepid Geophysics, http://www.intrepid-geophysics.com; Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).

Created: 07 03 2020

Issued: 07 03 2020

Modified: 06 07 2021

Data time period: 21 07 1999 to 04 11 1999

This dataset is part of a larger collection

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text: westlimit=143.9652; southlimit=-18.0409; eastlimit=145.5808; northlimit=-16.9614; projection=GDA94 (EPSG:4283)

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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 GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic (GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic file download)

url : https://thredds.nci.org.au/thredds/fileServer/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/QLD/grid/P798/P798-grid-tmi_1vd.nc External Link

NetCDF Subsetting Service (NCSS) for GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic (GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic NCSS)

url : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/QLD/grid/P798/P798-grid-tmi_1vd.nc/dataset.html External Link

OPeNDAP web service for GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic (GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic OPeNDAP)

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/QLD/grid/P798/P798-grid-tmi_1vd.nc.html External Link

OGC Web Mapping Service (WMS) for GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic (GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic WMS)

url : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/QLD/grid/P798/P798-grid-tmi_1vd.nc?service=WMS&version=1.3.0&request=GetCapabilities External Link

OGC Web Coverage Service (WCS) for GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic (GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic WCS)

url : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/QLD/grid/P798/P798-grid-tmi_1vd.nc?service=WCS&version=1.0.0&request=GetCapabilities External Link

GSQ Hodgkinson Georgetown Block B Qld magnetic vd1 grid geodetic NCSS