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 potassium grid has a cell size of 0.00083 degrees (approximately 90m) and shows potassium element concentration of the Croydon, Qld, 2007 in units of percent (or %). The data used to produce this grid was acquired in 2007 by the QLD Government, and consisted of 100315 line-kilometres of data at 400m line spacing and 80m terrain clearance.
Lineage
Maintenance and Update Frequency: notPlanned
Statement: This GSQ Croydon percent potassium grid geodetic is an airborne-derived radiometric potassium grid for the Croydon, Qld, 2007. The survey was acquired under the project No. 1146 for the geological survey of QLD. The grid has a cell size of 0.00083 degrees (approximately 90m). A total of 100315 line-kilometres of data at a line spacing of 400m and 80m terrain clearance were acquired to produce this grid. This radiometric potassium grid shows potassium element concentration of the Croydon, Qld, 2007 in units of percent (or %). 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: 06 07 2021
Data time period: 02 06 2007 to 21 09 2007
text: westlimit=139.4525; southlimit=-19.2108; eastlimit=142.0482; northlimit=-17.4067; projection=GDA94 (EPSG:4283)
Subjects
Australia |
EARTH SCIENCES |
Earth sciences |
GADDS2.0 |
K |
NCI |
Published_External |
QLD |
airborne digital data |
gamma-ray |
geophysical survey |
geophysics |
geoscientificInformation |
grid |
potassium |
rad |
radiometrics |
raster |
spectrometry |
survey 1146 |
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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 GSQ Croydon percent potassium grid geodetic (GSQ Croydon percent potassium grid geodetic file download)
NetCDF Subsetting Service (NCSS) for GSQ Croydon percent potassium grid geodetic (GSQ Croydon percent potassium grid geodetic NCSS)
OPeNDAP web service for GSQ Croydon percent potassium grid geodetic (GSQ Croydon percent potassium grid geodetic OPeNDAP)
OGC Web Mapping Service (WMS) for GSQ Croydon percent potassium grid geodetic (GSQ Croydon percent potassium grid geodetic WMS)
OGC Web Coverage Service (WCS) for GSQ Croydon percent potassium grid geodetic (GSQ Croydon percent potassium grid geodetic WCS)
GSQ Croydon percent potassium grid geodetic NCSS
GSQ Croydon percent potassium grid geodetic OPeNDAP
GSQ Croydon percent potassium grid geodetic WMS
GSQ Croydon percent potassium grid geodetic WCS
Identifiers
- URL : pid.geoscience.gov.au/dataset/ga/140463
- global : 47340c6b-d409-4d2b-89af-2780e8cce217
