From Geoscience Australia
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Cobar P5009 EXT 2 dose rate grid

Created 17/10/2025

Updated 17/10/2025

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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 Cobar P5009 EXT 2 dose rate grid has a cell size of 0.00039074 degrees (approximately 40m) and shows the terrestrial dose rate of the Cobar Magnetic and Radiometric Survey, 2021. The data used to produce this grid was acquired in 2021 by the NSW Government, and consisted of 53617 line-kilometres of data at 200m line spacing and 60m terrain clearance.

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Additional Info

Field Value
Title Cobar P5009 EXT 2 dose rate grid
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/06ce0634-8c58-47e4-b820-e5ece9cf79fc
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 08/06/2021 - 10/08/2021
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        145.1,
        -33.1
      ],
      [
        147.1,
        -33.1
      ],
      [
        147.1,
        -31.1
      ],
      [
        145.1,
        -31.1
      ],
      [
        145.1,
        -33.1
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Cobar P5009 EXT 2 dose rate grid". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/cobar-p5009-ext-2-dose-rate-grid