National Gravity Compilation 2019 includes airborne CSCBA 1VD image

Australia and its continental margins are covered by a gravity anomaly grid with a cell size of approximately 435 meters. The grid is derived from nearly 1.4 million ground gravity stations, supplemented by 345,000 line km of airborne gravity and 106,000 line km of airborne gravity gradiometry data, processed by Geoscience Australia. Data sources range from the 1940s to September 2019, including offshore data from global institutions.

Use Cases

• Map subsurface geological structures based on gravity anomaly variations.
• Identify potential mineral deposits based on density contrasts in the crust.
• Model continental margin architecture based on offshore gravity data integration.
• Enhance regional geological maps based on high-resolution airborne gravity gradiometry.

Strengths

• Integrates approximately 1.8 million gravity observations from multiple sources.
• Includes 345,000 line km of airborne gravity and 106,000 line km of airborne gravity gradiometry for improved resolution.
• Ground station spacing varies from 11 km down to less than 1 km, with major parts between 2.5 and 7 km.
• Data quality is checked by GA geophysicists to ensure it is fit-for-purpose.

Limitations

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

Provenance

Source

Australian Ocean Data Network, Geoscience Australia (GA), Commonwealth/State/Territory Governments, mining industry, universities, Scripps Institution of Oceanography, NOAA, NGA.

Collection Method

Ground and airborne gravity surveys processed via standard methods and FFT to calculate the first vertical derivative.

Time Range

1940s to September 2019

Freshness

Last updated 2026-06-27 20:16:10.556900; freshness should be verified.

Geography

Australia and its continental margins