Southwest Australia Geophysical Grids: Bathymetry, Gravity, and Magnetic Data

Southwest Australia from 24 to 46 degrees South and 106 to 140 degrees East is covered by digital grids of bathymetry, gravity, and magnetic data. The Australian Geological Survey Organisation (AGSO) produced the dataset by performing a network adjustment on marine ship-track data and combining it with onshore and satellite-derived data. The work was done in cooperation with Desmond Fitzgerald & Associates and the Australian Hydrographic Office.

Use Cases

• Modeling seafloor topography based on the bathymetry grid data.
• Analyzing crustal density variations based on the gravity grid data.
• Mapping geological structures and magnetic anomalies based on the magnetic grid data.
• Integrating multi-sensor geophysical data for regional geological studies.

Strengths

• Data integrates multiple sources: land, marine, and satellite-derived data.
• Coverage spans a large geographic quadrant of Australia (24-46S, 106-140E).
• Results were obtained via a network adjustment on marine ship-track data, which likely improves consistency.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file size are unknown, which may limit suitability assessment.

Provenance

Source

Australian Geological Survey Organisation (AGSO), now Geoscience Australia.

Collection Method

Network adjustment on marine ship-track data combined with onshore and satellite-derived data.

Freshness

Last updated 2026-03-25 18:01:19.232380; freshness should be verified.

Geography

Southwest quadrant of Australia (24 - 46S, 106-140E), including the Great Australian Bight.