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A New High-resolution Depth Model for the Terre Adélie and George V Shelf and Margin, East Antarctica

Created 16/10/2025

Updated 16/10/2025

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Abstract: The Collaborative East Antarctic Marine Census (CEAMARC) surveys to the Terre Adélie and George V shelf and margin highlight the requirement for a revised high resolution depth model that can be used as a spatial tool for improving physical models of the region. We have combined available shiptrack and multibeam bathymetry, coastline and land topographic data to develop a new high-resolution depth model, called GVdem. GVdem spans an area 138°E to 148°E longitude and 63°S to 69°S latitude, with a choice of three ESRI grids with cell pixel sizes: 15 arcsec, 9 arcsec and 3.6 arcsec. The revised depth model is an improvement over previously available regional-scale grids, and highlights seabed physiographic detail not previously observed for this part of East Antarctica. In particular, the extent and complexity of the inner-shelf depressions are revealed and their relationship with large shelf basins and adjacent flat-topped banks.

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Title A New High-resolution Depth Model for the Terre Adélie and George V Shelf and Margin, East Antarctica
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/74a56f7f-b5e6-49ed-9364-ad454fc0f03c
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        138.0,
        -69.0
      ],
      [
        150.0,
        -69.0
      ],
      [
        150.0,
        -64.0
      ],
      [
        138.0,
        -64.0
      ],
      [
        138.0,
        -69.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "A New High-resolution Depth Model for the Terre Adélie and George V Shelf and Margin, East Antarctica". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/a-new-high-resolution-depth-model-for-the-terre-adalie-and-george-v-shelf-and-margin-east-antar