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

Geoscience Australia's National Gravity Compilation 2019 includes airborne - CSCBA 0.5VD grid is a gravity anomaly grid with a cell size of 0.00417 degrees (approximately 435m). It integrates nearly 1.4 million ground stations from the Australian National Gravity Database, 345,000 line km of airborne gravity, and 106,000 line km of airborne gravity gradiometry data, collected from the 1940s to 2019. The grid is derived from the 2019 Australian National Gravity Grids B series and processed using a fast Fourier transform to calculate a first vertical derivative of the complete spherical cap Bouguer anomaly.

Use Cases

• Modeling subsurface geological structures based on gravity anomaly data.
• Enhancing resolution of ground-based gravity surveys by integrating airborne gravity and gradiometry data.
• Conducting mineral and resource exploration by interpreting density variations in the Earth's crust.
• Studying continental margins and tectonic features using the grid's coverage of Australia and its offshore areas.

Strengths

• Integrates a large volume of data, including nearly 1.4 million ground gravity stations and 451,000 line km of airborne surveys.
• Data quality is checked by Geoscience Australia geophysicists to ensure it is fit-for-purpose.
• Provides high-resolution coverage with station spacing as low as 1 km and airborne line spacing from 0.5 km to 2.5 km.

Limitations

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

Provenance

Source

Geoscience Australia (GA), Commonwealth, State and Territory Governments, mining industry, universities, and research organisations.

Collection Method

Processed from ground observations, offshore global gravity data, and airborne surveys, with terrain corrections applied using bathymetry and topography.

Time Range

Data collected from the 1940s to September 2019.

Freshness

Last updated 2026-04-16 08:47:08.715067; freshness should be verified.

Geography

Australia and its continental margins.