National Gravity Compilation 2019: Airborne CSCBA 0.5VD Grid for Australia

A 2019 compilation integrates nearly 1.4 million ground gravity stations, 345,000 line km of airborne gravity, and 106,000 line km of airborne gravity gradiometry data collected from the 1940s onward. The grid, with a cell size of approximately 435m, shows a half vertical derivative of complete Bouguer anomalies over Australia and its margins. It was processed and quality-checked by Geoscience Australia geophysicists, incorporating offshore data from global sources.

Use Cases

• Model subsurface geological structures based on gravity anomaly data.
• Enhance mineral exploration targeting by integrating airborne gravity gradiometry data.
• Study continental margin geology using combined onshore and offshore gravity observations.
• Apply terrain corrections for geophysical surveys using the provided Bouguer anomaly grid.

Strengths

• Integrates a large volume of data, including nearly 1.4 million ground stations and 451,000 line km of airborne surveys.
• Data quality is checked by GA geophysicists to ensure it is fit-for-purpose.
• Combines multiple data sources (ground, airborne, offshore) collected from the 1940s to 2019 for comprehensive coverage.
• Provides high-resolution data with station spacing down to less than 1 km in parts of the continent.

Limitations

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

Provenance

Source

Geoscience Australia Data, incorporating data from Commonwealth, State, Territory Governments, industry, universities, and global institutions like Scripps Institution of Oceanography.

Collection Method

Processed from the Australian National Gravity Database and global grids, with terrain corrections and a Fast Fourier Transform applied to produce a first vertical derivative grid.

Time Range

1940s to 2019

Freshness

Last updated 2026-03-25 19:14:00.816126; freshness should be verified.

Geography

Australia and its continental margins