Australian Gravity Anomaly Grid 2019 with Airborne Data

The 2019 compilation integrates gravity observations from the 1940s to present day. It includes approximately 1.8 million gravity observations, combining nearly 1.4 million ground stations, 345,000 line km of airborne gravity, and 106,000 line km of airborne gravity gradiometry. The processed grid, with a cell size of approximately 435m, was quality-checked by GA geophysicists and released by the Australian Ocean Data Network.

Use Cases

• Model subsurface geological structures based on gravity anomaly data.
• Detect density variations in rock formations based on gravity measurements.
• Integrate terrestrial and marine gravity data for continental-scale analysis.
• Perform terrain corrections for gravity surveys using bathymetry and topography data.
• Validate airborne gravity survey methodologies against ground station data.

Strengths

• Integrates approximately 1.8 million gravity observations from multiple sources.
• Combines ground data with 345,000 line km of airborne gravity and 106,000 line km of airborne gravity gradiometry.
• Grid has a defined cell size of 0.00417 degrees (approximately 435m).
• Data collection spans from the 1940s to the present day, providing historical depth.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to data_gov_au, focusing on Australia and its margins.

Provenance

Source

Australian Ocean Data Network

Collection Method

Processed from the Australian National Gravity Database and supplemented with global offshore grids.

Time Range

1940s to 2019

Freshness

Last updated 2026-04-16 15:40:27.536944; freshness should be verified.

Geography

Australia and its continental margins