Southwest Australia Geophysical Grids for Bathymetry, Gravity, and Magnetics

2026-03-07 updated grids integrate land, marine, and satellite data for the southwest quadrant of Australia (24-46S, 106-140E). The Australian Geological Survey Organisation produced these bathymetry, gravity, and magnetic datasets in cooperation with Desmond Fitzgerald & Associates and the Australian Hydrographic Office.

Use Cases

• Model crustal density structures by analyzing gravity grid anomalies across the marine and land regions.
• Correlate magnetic grid data with bathymetry grids to identify subsurface geological features and plate boundaries.
• Integrate bathymetry grids with satellite-derived data for regional seafloor morphology and resource studies.

Strengths

• Integrates three distinct geophysical data types: bathymetry, gravity, and magnetics.
• Combines data from multiple authoritative sources: land surveys, marine ship-tracks, and satellite observations.
• Covers a defined geographic region of southwest Australia from 24 to 46 degrees South and 106 to 140 degrees East.

Limitations

• Specific grid resolution, row/column counts, and file sizes are unknown from the input.
• Data is presented as finalized grids, limiting access to the original raw survey measurements for reprocessing.
• Temporal range for the source survey data is not specified, potentially mixing measurements from different eras.

Provenance

Source

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

Collection Method

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

Time Range

null

Freshness

Last updated 2026-03-07.

Geography

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