National Gravity Compilation 2019: Australian Gravity Anomaly Grid

A gravity anomaly grid for Australia and its continental margins derived from approximately 1.8 million ground and airborne observations. The data integrates ground stations from the Australian National Gravity Database, offshore data from global sources, and airborne gravity surveys totaling 451,000 line kilometers. The grid has a cell size of approximately 435 meters and was compiled by Geoscience Australia using data acquired from the 1940s to 2019.

Use Cases

• Model subsurface geological structures based on gravity anomaly data.
• Identify mineral exploration targets based on density contrasts revealed by the processed gravity grid.
• Integrate with other geophysical datasets for regional geological mapping based on the described spatial coverage.
• Assess data quality for specific regions based on the described station and line spacing variations.

Strengths

• Integrates approximately 1.8 million gravity observations from multiple sources.
• Includes 451,000 line kilometers of airborne gravity and gravity gradiometry data to improve resolution.
• Grid cell size is approximately 435 meters, providing a detailed spatial scale.
• Data quality was checked by Geoscience Australia geophysicists prior to release.

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 contributing surveys.

Provenance

Source

Australian Ocean Data Network, Geoscience Australia.

Collection Method

Compiled from ground observations, airborne surveys, and global gravity grids.

Time Range

1940s to 2019.

Freshness

Last updated 2026-06-23 02:57:42.660085; freshness should be verified.

Geography

Australia and its continental margins.