Dataset

Radiometric uranium equivalent grid of Widgiemooltha North, WA, 2013 survey

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://pid.geoscience.gov.au/dataset/ga/107787&rft.title=Radiometric uranium equivalent grid of Widgiemooltha North, WA, 2013 survey&rft.identifier=http://pid.geoscience.gov.au/dataset/ga/107787&rft.publisher=Commonwealth of Australia (Geoscience Australia)&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. This radiometric uranium grid has a cell size of 0.000208 degrees (approximately 20m) and shows uranium element concentration of the Widgiemooltha North, WA, 2013 survey. The data used to produce this grid was acquired in 2014 by the WA Government, and consisted of 92361 line-kilometres of data at 100m line spacing and 50m terrain clearance.This rWA1259u.nc grid is an airborne-derived radiometric uranium equivalent grid for the Widgiemooltha North, WA, 2013 survey. The survey was acquired under the project No. 1259 for the geological survey of WA. The grid has a cell size of 0.000208 degrees (approximately 20m). A total of 92361 line-kilometres of data at a line spacing of 100m 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. Further up to date information about individual surveys can also be obtained online from the Airborne Surveys Database at http://www.ga.gov.au/oracle/argus/. The original grid was converted from ERMapper (.ers) format to netCDF4_classic format using GDAL1.11.1. The main purpose of this conversion is to enable access to the data by relevant open source tools and software. The netCDF grid was created on 2016-08-29T10:51:42, 2013-05-03T00:00:00 and has its y-axis indexed Southward-positive. References 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=2011&rft.coverage=northlimit=-30.979896; southlimit=-31.523400; westlimit=121.476563; eastLimit=123.013475&rft.coverage=northlimit=-30.979896; southlimit=-31.523400; westlimit=121.476563; eastLimit=123.013475&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=radiometrics&rft_subject=uranium&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=survey 1259&rft_subject=AWAGS&rft_subject=NCI&rft_subject=Earth sciences&rft_subject=geophysics&rft_subject=grid&rft_subject=Australia&rft_subject=WA&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data

Licence & Rights:

Open Licence view details
CC-BY

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

Access:

Open

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.
This radiometric uranium grid has a cell size of 0.000208 degrees (approximately 20m) and shows uranium element concentration of the Widgiemooltha North, WA, 2013 survey. The data used to produce this grid was acquired in 2014 by the WA Government, and consisted of 92361 line-kilometres of data at 100m line spacing and 50m terrain clearance.

Lineage

This rWA1259u.nc grid is an airborne-derived radiometric uranium equivalent grid for the Widgiemooltha North, WA, 2013 survey. The survey was acquired under the project No. 1259 for the geological survey of WA. The grid has a cell size of 0.000208 degrees (approximately 20m). A total of 92361 line-kilometres of data at a line spacing of 100m 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. Further up to date information about individual surveys can also be obtained online from the Airborne Surveys Database at http://www.ga.gov.au/oracle/argus/.
The original grid was converted from ERMapper (.ers) format to netCDF4_classic format using GDAL1.11.1. The main purpose of this conversion is to enable access to the data by relevant open source tools and software. The netCDF grid was created on 2016-08-29T10:51:42, 2013-05-03T00:00:00 and has its y-axis indexed Southward-positive.
References
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).

Issued: 2011

Data time period: 2013-07-25 to 2014-01-28

123.013475,-30.979896 123.013475,-31.5234 121.476563,-31.5234 121.476563,-30.979896 123.013475,-30.979896

122.245019,-31.251648

text: northlimit=-30.979896; southlimit=-31.523400; westlimit=121.476563; eastLimit=123.013475

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Other Information
Digital Object Identifier for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339

doi : http://dx.doi.org/10.4225/25/58a4374a1acb1

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local : file:///g/data1/rr2/airborne_geophysics/WA/P1259/radiometrics/uranium/grid/rWA1259u/rWA1259u.nc

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NetCDF Subset Service for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339 (NCSS for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339)

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OPeNDAP landing page for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339 (OPeNDAP service for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339)

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OGC Web Coverage Service for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339 (WCS for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339)

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OGC Web Mapping Service for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339 (WMS for dataset 978d83bc-bd6d-4c17-9b5b-cfb47b176339)

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Identifiers
  • global : 978d83bc-bd6d-4c17-9b5b-cfb47b176339