National Gravity Compilation 2019 with Airborne Tilt Grid for Australia

Geoscience Australia's 2019 National Gravity Compilation integrates approximately 1.8 million gravity observations. The grid combines ground data from the Australian National Gravity Database, 345,000 line km of airborne gravity, and 106,000 line km of airborne gravity gradiometry, supplemented with offshore data from Scripps Institution of Oceanography. It provides a tilt-filtered Bouguer anomaly grid at a 0.00417-degree cell size for geological interpretation.

Use Cases

• Modeling subsurface geological structures based on Bouguer gravity anomalies.
• Enhancing geological mapping resolution in areas with sparse ground data using airborne gravity and gradiometry.
• Integrating terrestrial and marine geological studies using combined onshore and offshore gravity data.
• Applying terrain corrections for geophysical analysis using integrated bathymetry and topography data.

Strengths

• Integrates a large volume of data, including nearly 1.4 million ground stations and 451,000 line km of airborne surveys.
• Combines multiple data sources (ground, airborne, offshore) for comprehensive continental coverage.
• Data quality is explicitly checked by GA geophysicists to be fit-for-purpose.
• Provides a specific spatial resolution with a grid cell size of approximately 435 meters.

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 bias inherent to the collection methods and sources.

Provenance

Source

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

Collection Method

Standard processing of ground, airborne, and offshore gravity measurements, with terrain corrections applied.

Time Range

Data acquired from the 1940s to September 2019.

Freshness

Last updated 2026-06-23 04:06:02.390016; freshness should be verified.

Geography

Australia and its continental margins.