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 MRTAS Mathinna totalcount grid geodetic has a cell size of 0.0005 degrees (approximately 49m) and shows the terrestrial dose rate of the NETGOLD - Mathinna, Tas , 1990. The data used to produce this grid was acquired in 1990 by the TAS Government, and consisted of 1680 line-kilometres of data at 150m line spacing and 80m terrain clearance.
Lineage
Maintenance and Update Frequency: notPlanned
Statement: This MRTAS Mathinna totalcount grid geodetic is an airborne-derived radiometric terrestrial dose rate grid for the NETGOLD - Mathinna, Tas , 1990 survey. The survey was acquired under the project No. 782 for the geological survey of TAS. The grid has a cell size of 0.0005 degrees (approximately 49m). A total of 1680 line-kilometres of data at a line spacing of 150m 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: 12 02 1990 to 20 02 1990
text: westlimit=147.826; southlimit=-41.6495; eastlimit=147.9535; northlimit=-41.4395; projection=AGD66 (EPSG:4202)
Subjects
Australia |
EARTH SCIENCES |
Earth sciences |
GADDS2.0 |
K |
NASVD |
NCI |
Published_External |
TAS |
Th |
U |
airborne digital data |
dose |
dose rate |
gamma-ray |
geophysical survey |
geophysics |
geoscientificInformation |
grid |
potassium |
rad |
radiometrics |
raster |
rate |
spectrometry |
survey 782 |
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 MRTAS Mathinna totalcount grid geodetic (MRTAS Mathinna totalcount grid geodetic file download)
NetCDF Subsetting Service (NCSS) for MRTAS Mathinna totalcount grid geodetic (MRTAS Mathinna totalcount grid geodetic NCSS)
OPeNDAP web service for MRTAS Mathinna totalcount grid geodetic (MRTAS Mathinna totalcount grid geodetic OPeNDAP)
OGC Web Mapping Service (WMS) for MRTAS Mathinna totalcount grid geodetic (MRTAS Mathinna totalcount grid geodetic WMS)
OGC Web Coverage Service (WCS) for MRTAS Mathinna totalcount grid geodetic (MRTAS Mathinna totalcount grid geodetic WCS)
MRTAS Mathinna totalcount grid geodetic NCSS
MRTAS Mathinna totalcount grid geodetic OPeNDAP
MRTAS Mathinna totalcount grid geodetic WMS
MRTAS Mathinna totalcount grid geodetic WCS
Identifiers
- URL : pid.geoscience.gov.au/dataset/ga/141948
- global : af7f80aa-0662-4738-b600-2482e0affe00
