Australian Gravity Anomaly Grid with 435m Resolution, 2019 Compilation

Nearly 1.4 million gravity stations from a national database were used to create this tilt-filtered grid. The data combines ground observations from the 1940s onward with offshore gravity data, processed with terrain corrections. Geoscience Australia released this grid, which has a cell size of approximately 435 meters and covers Australia and its continental margins.

Use Cases

• Model subsurface geological structures based on gravity anomaly data.
• Map density variations in the Earth's crust for mineral exploration based on processed gravity observations.
• Integrate onshore and offshore geophysical data for continental-scale studies based on the combined data sources.

Strengths

• Derived from nearly 1.4 million quality-checked gravity stations out of approximately 1.8 million total observations.
• Data integrates decades of ground observations (1940s-present) with a global offshore gravity grid.
• Processed with terrain corrections using both bathymetry and topography data.

Limitations

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

Provenance

Source

Geoscience Australia Data, sourced from the Australian National Gravity Database and Scripps Institution of Oceanography/NOAA/NGA global grid.

Collection Method

Ground and marine gravity observations processed with standard methods and a tilt filter applied to a spherical cap Bouguer anomaly.

Time Range

Ground observations from the 1940s to September 2019.

Freshness

Last updated 2026-03-25 16:32:12.102834; freshness should be verified.

Geography

Australia and its continental margins.