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2019 Australian National Gravity Grids Explanatory Notes

Created 17/10/2025

Updated 17/10/2025

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This set of explanatory notes provided the process of creating the 2019 National Gravity Grids released September 2020. This information provides a step by step guide to the processing sequence undertaken. The Notes provide: 1) the data sources for the grids, such as Geoscience Australia's National Airborne Geophysics Database (NAGD), the Australian National Gravity Database (ANGD), and Sandwell and Smith (v28p1) satellite gravity data. 2) Equations used to reduce gravity, gridding calculations, and observation surface for the "B" series grids, 3) Step by step processing sequence. There is also a section with a simple aid to interpreting the grids. The grids are available either as a complete set of grids, or individually, from the associated link.
Links: https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/133023

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Additional Info

Field Value
Title 2019 Australian National Gravity Grids Explanatory Notes
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/a5f7e7a8-bc27-4afd-8e77-4e70dd6d8c2e
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 01/09/2019 - 15/07/2020
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        108.0,
        -48.0
      ],
      [
        164.0,
        -48.0
      ],
      [
        164.0,
        -8.0
      ],
      [
        108.0,
        -8.0
      ],
      [
        108.0,
        -48.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "2019 Australian National Gravity Grids Explanatory Notes". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/2019-australian-national-gravity-grids-explanatory-notes