National Gravity Compilation 2019: Airborne and Ground Gravity Anomaly Grid for Australia

Australia and its continental margins are covered by a gravity anomaly grid with a cell size of approximately 435 meters. The grid integrates nearly 1.4 million ground stations from the Australian National Gravity Database, 345,000 line km of airborne gravity data, and 106,000 line km of airborne gravity gradiometry, collected from the 1940s to 2019. It was processed by Geoscience Australia using terrain corrections and a first vertical derivative transform.

Use Cases

• Modeling subsurface geological structures based on gravity anomaly patterns.
• Identifying potential mineral deposits based on density contrasts revealed in the grid.
• Integrating gravity data with other geophysical surveys for enhanced geological interpretation.
• Studying continental margin tectonics based on the offshore gravity data included.

Strengths

• Integrates a large volume of observations, including nearly 1.4 million ground stations and over 450,000 line km of airborne surveys.
• Provides improved resolution in areas with poor ground data quality by incorporating airborne gravity and gradiometry.
• Covers a long temporal range, with data collected from the 1940s to 2019.

Limitations

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

Provenance

Source

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

Collection Method

Ground and airborne gravity measurements processed with terrain corrections and a Fast Fourier Transform to calculate the first vertical derivative.

Time Range

1940s to 2019

Freshness

Last updated 2026-04-20 01:29:43.373278; freshness should be verified.

Geography

Australia and its continental margins