National Gravity Compilation 2019: Australian Airborne and Ground Gravity Grid

The National Gravity Compilation 2019 includes airborne - CSCBA 0.5VD grid is a geophysical dataset derived from the 2019 Australian National Gravity Grids B series. It integrates nearly 1.4 million ground gravity stations, 345,000 line km of airborne gravity data, and 106,000 line km of airborne gravity gradiometry, collected from the 1940s to 2019. The grid 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.
• Enhance mineral exploration targeting by integrating gravity gradients with other geophysical data.
• Study continental-scale tectonic features using the compiled gravity field over Australia.
• Validate and calibrate regional geophysical models using the extensive ground and airborne data coverage.

Strengths

• Integrates a large volume of observations, 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 over decades, providing broad temporal and spatial coverage.
• Grid resolution is approximately 435 meters, with station spacing in major parts of the continent between 2.5 and 7 km.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for specific computational tasks.
• Data may reflect geographic or source bias inherent to the compilation from government, industry, and academic sources over a long time period.

Provenance

Source

Australian Ocean Data Network, incorporating data from the Australian National Gravity Database and global sources.

Collection Method

Processed from ground and airborne gravity observations using standard methods, terrain corrections, and a Fast Fourier Transform (FFT) to calculate the first vertical derivative.

Time Range

1940s to 2019

Freshness

Last updated 2026-04-10 17:46:47.232094; freshness should be verified.

Geography

Australia and its continental margins