National Gravity Compilation 2019: Complete Bouguer Anomaly Image of Australia

National Gravity Compilation 2019 includes airborne CSCBA image is a gravity anomaly grid derived from approximately 1.8 million observations. The Australian Ocean Data Network compiled this data from ground stations, airborne surveys, and offshore sources, with observations dating from the 1940s to 2019. The grid has a cell size of 0.00417 degrees and shows complete Bouguer anomalies over Australia and its continental margins.

Use Cases

• Model subsurface geological structures based on gravity anomaly data.
• Map continental margins and bathymetry based on integrated offshore and onshore terrain corrections.
• Support mineral and resource exploration based on density variations revealed by gravity measurements.
• Validate and integrate airborne survey data (345,000 line km gravity, 106,000 line km gradiometry) with ground observations.

Strengths

• Integrates approximately 1.8 million gravity observations from multiple sources.
• Combines ground data (1.4 million stations), airborne gravity (345,000 line km), and airborne gradiometry (106,000 line km).
• Data collection spans from the 1940s to 2019, providing historical depth.
• Grid cell size is 0.00417 degrees (approximately 435m), offering regional-scale resolution.

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 and temporal bias inherent to the aggregation of historical government and industry surveys.

Provenance

Source

Australian Ocean Data Network, incorporating data from Commonwealth, State, Territory Governments, industry, universities, and Scripps Institution of Oceanography.

Collection Method

Processed ground and airborne gravity observations stored in the Australian National Gravity Database, supplemented by a global gravity grid.

Time Range

1940s to 2019.

Freshness

Last updated 2026-04-10 22:21:34.250928; freshness should be verified.

Geography

Australia and its continental margins.