Data

Radiometric Grid of Australia (Radmap) v4 2019 unfiltered terrestrial dose rate

Geoscience Australia
Poudjom Djomani, Y. ; Minty, B.R.S.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26186/5dd4a6f76de45&rft.title=Radiometric Grid of Australia (Radmap) v4 2019 unfiltered terrestrial dose rate&rft.identifier=10.26186/5dd4a6f76de45&rft.publisher=Geoscience Australia&rft.description=The unfiltered terrestrial dose rate grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia, which is a merge of over 600 individual gamma-ray spectrometric surveys. 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 unfiltered terrestrial dose rate grid is derived as a linear combination of the unfiltered K, U and Th grids, and has a cell size of about 100m (0.001 degrees).Maintenance and Update Frequency: notPlannedStatement: The unfiltered terrestrial dose rate grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia. The radiometric grid of Australia is derived by merging over 600 airborne gamma-ray spectrometric surveys by the Commonwealth, State and Territory Governments and held in the national radioelement database of Australia. The cell sizes of the original survey grids range from 50 m through 800 m, but most have a cell size of about 100 m. TThe original survey grids are levelled to each other, and to the Australia Wide Airborne Geophysical Survey (AWAGS). The grids were then re-sampled to generate the Radiometric Map of Australia Grids with a cell size of about 100m (0.001 degrees). The survey grids are levelled to each other, and to the Australia Wide Airborne Geophysical Survey (AWAGS). The AWAGS traverses were funded under the Australian Government’s Onshore Energy Security Program in 2007. They comprise N-S flight lines spaced 75 km apart and E-W tie lines spaced 400 km apart across the entire continent. The AWAGS survey was designed to serve as a baseline for both airborne gamma-ray spectrometric and magnetic surveys. Since the AWAGS traverses are consistent with the International Atomic Energy Agency’s (IAEA) radioelement datum, the new continental merges are level to this datum as well. The 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.&rft.creator=Poudjom Djomani, Y. &rft.creator=Minty, B.R.S. &rft.date=2019&rft.coverage=westlimit=112.7175; southlimit=-43.7615; eastlimit=153.6715; northlimit=-9.0005; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=112.7175; southlimit=-43.7615; eastlimit=153.6715; northlimit=-9.0005; projection=GDA94 (EPSG:4283)&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=Australian Government Security ClassificationSystem https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_subject=geoscientificInformation&rft_subject=airborne digital data&rft_subject=dose rate&rft_subject=radiometrics&rft_subject=national geophysical compilation&rft_subject=Earth sciences&rft_subject=geophysics&rft_subject=NCI&rft_subject=Australia&rft_subject=grid&rft_subject=Published_External&rft_subject=raster&rft_subject=GADDS2.0&rft_subject=2019&rft.type=dataset&rft.language=English Access the data
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The unfiltered terrestrial dose rate grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia, which is a merge of over 600 individual gamma-ray spectrometric surveys. 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 unfiltered terrestrial dose rate grid is derived as a linear combination of the unfiltered K, U and Th grids, and has a cell size of about 100m (0.001 degrees).

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Maintenance and Update Frequency: notPlanned
Statement: The unfiltered terrestrial dose rate grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia. The radiometric grid of Australia is derived by merging over 600 airborne gamma-ray spectrometric surveys by the Commonwealth, State and Territory Governments and held in the national radioelement database of Australia. The cell sizes of the original survey grids range from 50 m through 800 m, but most have a cell size of about 100 m. TThe original survey grids are levelled to each other, and to the Australia Wide Airborne Geophysical Survey (AWAGS). The grids were then re-sampled to generate the Radiometric Map of Australia Grids with a cell size of about 100m (0.001 degrees). The survey grids are levelled to each other, and to the Australia Wide Airborne Geophysical Survey (AWAGS). The AWAGS traverses were funded under the Australian Government’s Onshore Energy Security Program in 2007. They comprise N-S flight lines spaced 75 km apart and E-W tie lines spaced 400 km apart across the entire continent. The AWAGS survey was designed to serve as a baseline for both airborne gamma-ray spectrometric and magnetic surveys. Since the AWAGS traverses are consistent with the International Atomic Energy Agency’s (IAEA) radioelement datum, the new continental merges are level to this datum as well. The 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.

Created: 04 10 2019

Issued: 20 11 2019

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153.6715,-9.0005 153.6715,-43.7615 112.7175,-43.7615 112.7175,-9.0005 153.6715,-9.0005

133.1945,-26.381

text: westlimit=112.7175; southlimit=-43.7615; eastlimit=153.6715; northlimit=-9.0005; projection=GDA94 (EPSG:4283)

Subjects
2019 | Australia | Earth sciences | GADDS2.0 | NCI | Published_External | airborne digital data | dose rate | geophysics | geoscientificInformation | grid | national geophysical compilation | radiometrics | raster |

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Identifiers
ACN 633 798 857