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Lake Johnston Complete Spherical Cap Bouguer 1VD geodetic

Created 16/10/2025

Updated 16/10/2025

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Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. 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. This Lake Johnston Complete Spherical Cap Bouguer 1VD geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the South Yilgarn Gravity Survey, WA, 2009 (P200961). This gravity survey was acquired under the project No. 200961 for the geological survey of WA. The grid has a cell size of 0.0046 degrees (approximately 472m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 6125 gravity stations at 2500m spacing were acquired to produce this grid.

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Additional Info

Field Value
Title Lake Johnston Complete Spherical Cap Bouguer 1VD geodetic
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/b9f756f8-f707-4b25-b8e6-e301f8f123d0
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 24/07/2009 - 22/10/2009
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        119.9636,
        -33.0257
      ],
      [
        121.5138,
        -33.0257
      ],
      [
        121.5138,
        -31.9493
      ],
      [
        119.9636,
        -31.9493
      ],
      [
        119.9636,
        -33.0257
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Lake Johnston Complete Spherical Cap Bouguer 1VD geodetic". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/lake-johnston-complete-spherical-cap-bouguer-1vd-geodetic