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. 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 PIRSA Ooldea Doserate Grid Geodetic has a cell size of 0.00083 degrees (approximately 86m) and shows the terrestrial dose rate of the Ooldea-Nullarbor, SA, 2005. The data used to produce this grid was acquired in 2005 by the SA Government, and consisted of 36025 line-kilometres of data at 400m line spacing and 80m terrain clearance.
Lineage
Maintenance and Update Frequency: notPlanned
Statement: This PIRSA Ooldea Doserate Grid Geodetic is an airborne-derived radiometric terrestrial dose rate grid for the Ooldea-Nullarbor, SA, 2005 survey. The survey was acquired under the project No. 1101 for the geological survey of SA. The grid has a cell size of 0.00083 degrees (approximately 86m). A total of 36025 line-kilometres of data at a line spacing of 400m 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: 24 10 2005 to 13 12 2005
text: westlimit=131.0595; southlimit=-31.6456; eastlimit=132.0819; northlimit=-29.7057; projection=GDA94 (EPSG:4283)
Subjects
Australia |
EARTH SCIENCES |
Earth sciences |
GADDS2.0 |
K |
NASVD |
NCI |
Published_External |
SA |
Th |
U |
airborne digital data |
dose |
dose rate |
gamma-ray |
geophysical survey |
geophysics |
geoscientificInformation |
grid |
potassium |
rad |
radiometrics |
raster |
rate |
spectrometry |
survey 1101 |
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)
url :
https://portal.ga.gov.au/persona/gadds
File download for PIRSA Ooldea Doserate Grid Geodetic (PIRSA Ooldea Doserate Grid Geodetic file download)
NetCDF Subsetting Service (NCSS) for PIRSA Ooldea Doserate Grid Geodetic (PIRSA Ooldea Doserate Grid Geodetic NCSS)
OPeNDAP web service for PIRSA Ooldea Doserate Grid Geodetic (PIRSA Ooldea Doserate Grid Geodetic OPeNDAP)
OGC Web Mapping Service (WMS) for PIRSA Ooldea Doserate Grid Geodetic (PIRSA Ooldea Doserate Grid Geodetic WMS)
OGC Web Coverage Service (WCS) for PIRSA Ooldea Doserate Grid Geodetic (PIRSA Ooldea Doserate Grid Geodetic WCS)
PIRSA Ooldea Doserate Grid Geodetic NCSS
PIRSA Ooldea Doserate Grid Geodetic OPeNDAP
PIRSA Ooldea Doserate Grid Geodetic WMS
PIRSA Ooldea Doserate Grid Geodetic WCS
Identifiers
- URL : pid.geoscience.gov.au/dataset/ga/143201
- global : 51d9b5d9-d5de-47bd-b201-703690aeaf40
