From Australian Oceans Data Network
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National Gravity Compilation 2019 CSCBA 1VD image

Created 11/01/2026

Updated 11/01/2026

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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 National Gravity Compilation 2019 CSCBA 1VD image is an image derived from the complete spherical cap Bouguer anomaly grid for the 2019 Australian National Gravity Grids A series. These gravity data were acquired under the project No. 202008. The grid used to create this image has a cell size of 0.00417 degrees (approximately 435m). This gravity anomaly grid is derived from ground observations stored in the Australian National Gravity Database (ANGD) as at September 2019, supplemented with offshore data sourced from v28.1 of the Global Gravity grid developed using data from the Scripps Institution of Oceanography, the National Oceanic and Atmospheric Administration (NOAA), and National Geospatial-Intelligence Agency (NGA) at Scripps Institution of Oceanography, University of California San Diego. Out of the approximately 1.8 million gravity observations, nearly 1.4 million gravity stations in the ANGD, and marine data were used to generate this grid. The ground gravity data used in the national gravity grids has been acquired by the Commonwealth, State and Territory Governments, the mining and exploration industry, universities and research organisations from the 1940's to the present day. Station spacing varies from approximately 11 km down to less than 1 km, with major parts of the continent having station spacing between 2.5 and 7 km. Terrain corrections to gravity were calculated using both offshore bathymetry and onshore topography data. The image shows the first vertical derivative of the complete Bouguer anomalies over Australia and its continental margins. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the complete spherical cap Bouguer anomaly grid of the 2019 Australian National Gravity Grids A series.

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Additional Info

Field Value
Title National Gravity Compilation 2019 CSCBA 1VD image
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/f31efeea-cd19-44a7-ab7d-41a9cc2793ec
Contact Point
Australian Ocean Data Network
clientservices@ga.gov.au
Reference Period 19/06/2019 - 01/10/1947
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        107.9979,
        -48.0021
      ],
      [
        164.0021,
        -48.0021
      ],
      [
        164.0021,
        -7.9979
      ],
      [
        107.9979,
        -7.9979
      ],
      [
        107.9979,
        -48.0021
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "National Gravity Compilation 2019 CSCBA 1VD image". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/national-gravity-compilation-2019-cscba-1vd-image1