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Radiometric Grid of Australia (Radmap) v4 2019 ratio thorium over potassium

Created 17/10/2025

Updated 17/10/2025

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The thorium over potassium grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia. 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 2019 thorium over potassium was derived by seamlessly merging over 600 airborne gamma-ray spectrometric surveys. The final grid has a cell size of about 100m (0.001 degrees) and is derived from the filtered thorium and potassium grids.

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Additional Info

Field Value
Title Radiometric Grid of Australia (Radmap) v4 2019 ratio thorium over potassium
Language English
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/af24efbd-b364-400e-8fb1-00a0b370589a
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        112.7175,
        -43.7615
      ],
      [
        153.6715,
        -43.7615
      ],
      [
        153.6715,
        -9.0005
      ],
      [
        112.7175,
        -9.0005
      ],
      [
        112.7175,
        -43.7615
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Radiometric Grid of Australia (Radmap) v4 2019 ratio thorium over potassium". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/radiometric-grid-of-australia-radmap-v4-2019-ratio-thorium-over-potassium