Full 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 0.00063 degrees (approximately 66m) and shows uranium element concentration of the Robert merge, 1991-1998 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1991 by the WA Government, and consisted of 82900 line-kilometres of data at 300m line spacing and 60m terrain clearance.
Lineage
Maintenance and Update Frequency: notPlanned
Statement: This Robert combined uranium grid geodetic is an airborne-derived radiometric uranium grid for the Robert merge, 1991-1998. The survey was acquired under the project No. 1353 for the geological survey of WA. The grid has a cell size of 0.00063 degrees (approximately 66m). A total of 82900 line-kilometres of data at a line spacing of 300m and 60m terrain clearance were acquired to produce this grid. This radiometric uranium grid shows uranium element concentration of the Robert merge, 1991-1998 in units of parts per million (or ppm). Noise-adjusted singular value decomposition (NASVD) has been applied to the data. NASVD is a spectral component analysis procedure for the removal of noise from gamma-ray spectra. 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: 05 07 2021
Data time period: 28 02 1991 to 05 09 1998
text: westlimit=122.9797; southlimit=-27.0197; eastlimit=124.5197; northlimit=-25.9935; projection=WGS84 (EPSG:4326)
Subjects
Australia |
EARTH SCIENCES |
Earth sciences |
GADDS2.0 |
NASVD |
NCI |
Published_External |
U |
WA |
airborne digital data |
gamma-ray |
geophysical survey |
geophysics |
geoscientificInformation |
grid |
rad |
radiometrics |
raster |
spectrometry |
survey 1353 |
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)
url :
https://portal.ga.gov.au/persona/gadds
File download for Robert combined uranium grid geodetic (Robert combined uranium grid geodetic file download)
NetCDF Subsetting Service (NCSS) for Robert combined uranium grid geodetic (Robert combined uranium grid geodetic NCSS)
OPeNDAP web service for Robert combined uranium grid geodetic (Robert combined uranium grid geodetic OPeNDAP)
OGC Web Mapping Service (WMS) for Robert combined uranium grid geodetic (Robert combined uranium grid geodetic WMS)
OGC Web Coverage Service (WCS) for Robert combined uranium grid geodetic (Robert combined uranium grid geodetic WCS)
Robert combined uranium grid geodetic NCSS
Robert combined uranium grid geodetic OPeNDAP
Robert combined uranium grid geodetic WMS
Robert combined uranium grid geodetic WCS
Identifiers
- URL : pid.geoscience.gov.au/dataset/ga/143329
- global : abb978d0-0102-4415-a76b-58bf13162ba5
