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Morphometric descriptors of the Tasmanian Seamount Cluster

Created 12/11/2025

Updated 19/11/2025

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This record provides the bathymetry and morphometric descriptors of the Tasmanian Seamount Cluster (TSC) developed by Berry et al. (2025). Bathymetry was compiled from CSIRO RV Investigator and Southern Surveyor voyages utlising Kongsberg em710 and em122 multibeam echosounder systems. This was supplemented with data acquired aboard RV L’Atlante utilising a Kongsberg EM12D, during the 1994 Tasmante voyage. This supplementary bathymetry data was acquired and processed by Geoscience Australia, and resampled to allow integration with the more recent, higher resolution gridded data. Bathymetry is gridded at 30 m resolution. Morphometric descriptors were developed following the methods of Grosse (2009) to define a boundary definition layer (BDL). This layer defined 188 volcanic TSC edifices. ArcGIS Pro was then utilised to calculate associated metrics including height, volume, basal area, centroid latitude, centroid longitude, ellipticity index and irregularity index. The edifice outlines, and associated metrics, are all contained in the provided shapefile (TSC_Morphometric Parameters_2025.shp). The edifices were also grouped through unsupervised k-means clustering. The cluster number are also contained in the associated shapefile. A shapefile describing the extents of summit ridges is also provided (TSC_Summit Ridges_2025). In summary, This record contains: • TSC 30m Bathymetry grid • TSC morphometric parameters shapefile • TSC summit ridge shapefile

Files and APIs

Additional Info

Field Value
Title Morphometric descriptors of the Tasmanian Seamount Cluster
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/0fc9de6a-bfa3-4e37-920b-f1e54863e8d0
Contact Point
CSIRO Marlin Data Catalogue
Christopher.Berry@csiro.au
Reference Period 17/11/2025
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        146.85,
        -44.533333
      ],
      [
        147.783333,
        -44.533333
      ],
      [
        147.783333,
        -44.083333
      ],
      [
        146.85,
        -44.083333
      ],
      [
        146.85,
        -44.533333
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal CSIRO Marlin

Data Source

This dataset was originally found on CSIRO Marlin "Morphometric descriptors of the Tasmanian Seamount Cluster". Please visit the source to access the original metadata of the dataset:
https://marlin.csiro.au/geonetwork/srv/eng/csw/dataset/morphometric-descriptors-of-the-tasmanian-seamount-cluster