Brief description
The filtered terrestrial dose rate grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia, made of a combination of over 600 individual survey grids. 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 are collected on airborne geophysical surveys conducted by Commonwealth, State and Northern Territory Governments and the private sector.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 the unfiltered grid to generate the filtered terrestrial dose rate grid. The grid cell size is about 100m (0.001 degrees).
Lineage
Maintenance and Update Frequency: notPlannedThe data quality varies depending on the survey. The data 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 final grid is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
The filtered terrestrial dose rate grid was calculated by applying a low pass filter on the terrestrial dose rate grid.
Created: 04 11 2019
Issued: 20 11 2019
text: westlimit=112.7175; southlimit=-43.7615; eastlimit=153.6715; northlimit=-9.0005; projection=GDA94 (EPSG:4283)
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Download the data (ers) [2.2 GB]
uri :
https://d28rz98at9flks.cloudfront.net/131960/131960.zip
- global : fbaefb28-09ba-41e3-ab30-234dcfa25167
- URI : http://pid.geoscience.gov.au/dataset/ga/131960
- DOI : 10.26186/5dd48c423f927