National Gravity Compilation 2019: Tilt Grid of Australia at 435m Resolution

Nearly 1.4 million gravity stations from the Australian National Gravity Database were used to generate this tilt grid. The grid has a cell size of 0.00417 degrees, approximately 435 meters, and covers Australia and its continental margins. Data was compiled from ground observations dating from the 1940s to 2019, supplemented with offshore data from global sources.

Use Cases

• Modeling subsurface geological structures based on gravity anomaly data.
• Mapping density variations in the Earth's crust for mineral exploration.
• Integrating gravity data with other geophysical surveys for regional geological studies.
• Applying terrain corrections for enhanced geophysical interpretation based on the described processing.

Strengths

• Derived from nearly 1.4 million gravity stations out of a total of approximately 1.8 million observations.
• Grid cell size of 0.00417 degrees (approximately 435m) provides detailed spatial resolution.
• Data quality was checked by GA geophysicists to ensure it is fit-for-purpose.
• Incorporates data from multiple sources including Commonwealth, State, and industry collections from the 1940s onward.

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 or source bias inherent to the compilation method.

Provenance

Source

Australian Ocean Data Network, derived from the Australian National Gravity Database and global gravity grids.

Collection Method

Ground gravity observations processed with terrain corrections and a tilt filter applied to a spherical cap Bouguer anomaly grid.

Time Range

1940s to September 2019

Freshness

Last updated 2026-06-23 06:02:49.584889; freshness should be verified.

Geography

Australia and its continental margins