National Gravity Compilation 2019: Airborne Tilt Image of Australia

2019 gravity anomaly grid for Australia and its continental margins, derived from approximately 1.8 million ground and airborne observations. The grid has a cell size of 0.00417 degrees (approximately 435m) and incorporates data from the 1940s to 2019, sourced from government, industry, and research organizations. It was processed and quality-checked by Geoscience Australia geophysicists.

Use Cases

• Model subsurface geological structures based on complete Bouguer gravity anomalies.
• Identify potential mineral deposits based on density variations in the Earth's crust.
• Integrate with other geophysical data for regional geological mapping based on the high-resolution gravity grid.
• Study continental margin geology based on combined onshore and offshore gravity data.

Strengths

• Integrates nearly 1.4 million ground gravity stations with 345,000 line km of airborne gravity and 106,000 line km of airborne gravity gradiometry data.
• Station spacing varies from 11 km down to less than 1 km, with major parts of the continent between 2.5 and 7 km.
• Terrain corrections were applied using both offshore bathymetry and onshore topography data.

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 Data, incorporating data from Commonwealth, State, Territory Governments, industry, universities, and global sources.

Collection Method

Processed from ground observations in the Australian National Gravity Database and airborne surveys, supplemented with global offshore gravity data.

Time Range

1940s to 2019

Freshness

Last updated 2026-04-30 14:50:38.068130; freshness should be verified.

Geography

Australia and its continental margins