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

Geoscience Australia produced a set of digital bathymetry, gravity, and magnetic grids for the southwest quadrant of Australia. The grids cover a region from 24 to 46 degrees South and 106 to 140 degrees East, integrating land, marine, and satellite data. The results were obtained by performing a network adjustment on marine ship-track data and combining these with onshore and satellite-derived data.

Use Cases

• Modeling tectonic plate boundaries based on gravity and magnetic anomaly data.
• Mapping seafloor topography for navigation and habitat studies based on bathymetry grids.
• Integrating land and marine geophysical surveys for regional geological interpretation based on the combined dataset.

Strengths

• Grids cover a large, defined region (24-46S, 106-140E).
• Data integrates multiple sources: land, marine, and satellite.
• Work involved cooperation with external organizations (Desmond Fitzgerald & Associates, Australian Hydrographic Office).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Geoscience Australia Data, in cooperation with Desmond Fitzgerald & Associates and the Australian Hydrographic Office.

Collection Method

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

Freshness

Last updated 2026-04-30 14:20:46.881177; freshness should be verified.

Geography

Southwest quadrant of Australia (24 - 46S, 106-140E).