Data

Cootamundra dose rate grid geodetic

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=https://pid.geoscience.gov.au/dataset/ga/141479&rft.title=Cootamundra dose rate grid geodetic&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/141479&rft.description=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. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered terrestrial dose rate grid. This Cootamundra dose rate grid geodetic has a cell size of 0.00052 degrees (approximately 53m) and shows the terrestrial dose rate of the Cootamundra, NSW, 1997/98. The data used to produce this grid was acquired in 1997 by the NSW Government, and consisted of 69086 line-kilometres of data at 250m line spacing and 80m terrain clearance.Maintenance and Update Frequency: notPlannedStatement: This Cootamundra dose rate grid geodetic is an airborne-derived radiometric terrestrial dose rate grid for the Cootamundra, NSW, 1997/98 survey. The survey was acquired under the project No. 681 for the geological survey of NSW. The grid has a cell size of 0.00052 degrees (approximately 53m). A total of 69086 line-kilometres of data at a line spacing of 250m were acquired to produce this grid. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. 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: Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=146.9871; southlimit=-35.0044; eastlimit=148.5127; northlimit=-33.9951; projection=WGS84 (EPSG:4326)&rft.coverage=westlimit=146.9871; southlimit=-35.0044; eastlimit=148.5127; northlimit=-33.9951; projection=WGS84 (EPSG:4326)&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=(c) Commonwealth of Australia (Geoscience Australia) 2020&rft_rights=Australian Government Security ClassificationSystem&rft_rights=https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&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=NSW&rft_subject=survey 681&rft_subject=GADDS2.0&rft_subject=radiometrics&rft_subject=NASVD&rft_subject=thorium&rft_subject=uranium&rft_subject=potassium&rft_subject=dose rate&rft_subject=dose&rft_subject=rate&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=rad&rft_subject=K&rft_subject=Th&rft_subject=U&rft_subject=gamma-ray&rft_subject=spectrometry&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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Creative Commons Attribution 4.0 International Licence

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(c) Commonwealth of Australia (Geoscience Australia) 2020

Australian Government Security ClassificationSystem

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Contact Information

clientservices@ga.gov.au

Brief description

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. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered terrestrial dose rate grid.
This Cootamundra dose rate grid geodetic has a cell size of 0.00052 degrees (approximately 53m) and shows the terrestrial dose rate of the Cootamundra, NSW, 1997/98. The data used to produce this grid was acquired in 1997 by the NSW Government, and consisted of 69086 line-kilometres of data at 250m line spacing and 80m terrain clearance.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: This Cootamundra dose rate grid geodetic is an airborne-derived radiometric terrestrial dose rate grid for the Cootamundra, NSW, 1997/98 survey. The survey was acquired under the project No. 681 for the geological survey of NSW. The grid has a cell size of 0.00052 degrees (approximately 53m). A total of 69086 line-kilometres of data at a line spacing of 250m were acquired to produce this grid. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. 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:
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: 15 11 1997 to 20 03 1998

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148.5127,-33.9951 148.5127,-35.0044 146.9871,-35.0044 146.9871,-33.9951 148.5127,-33.9951

147.7499,-34.49975

text: westlimit=146.9871; southlimit=-35.0044; eastlimit=148.5127; northlimit=-33.9951; projection=WGS84 (EPSG:4326)

Subjects
Australia | EARTH SCIENCES | Earth sciences | GADDS2.0 | K | NASVD | NCI | NSW | Published_External | Th | U | airborne digital data | dose | dose rate | gamma-ray | geophysical survey | geophysics | geoscientificInformation | grid | potassium | rad | radiometrics | raster | rate | spectrometry | survey 681 | thorium | uranium |

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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)

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

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