National Gravity Compilation 2019: Complete Bouguer Anomaly Grid of Australia

Approximately 1.8 million gravity observations, including nearly 1.4 million ground stations and over 450,000 line kilometers of airborne surveys, were used to create this 2019 gravity anomaly grid. Geoscience Australia processed and quality-checked the data, which combines ground observations from the 1940s onward with offshore data from Scripps Institution of Oceanography. The resulting grid has a cell size of approximately 435 meters and shows complete Bouguer anomalies over Australia and its continental margins.

Use Cases

• Modeling subsurface density variations and geological structures based on the gravity anomaly data.
• Integrating gravity data with other geophysical surveys for mineral and resource exploration.
• Studying continental crustal architecture and tectonic features across Australia.
• Calibrating and validating regional-scale geophysical models using the standardized, quality-checked grid.

Strengths

• Integrates approximately 1.8 million observations from multiple sources, including ground, airborne gravity, and airborne gravity graiometry surveys.
• Data quality was checked by GA geophysicists to ensure it is fit-for-purpose.
• Provides continent-wide coverage of Australia and its margins with a consistent grid resolution of about 435 meters.
• Combines historical data from the 1940s with modern airborne surveys, offering long-term context.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for specific computational tasks.
• The description does not specify the license, which may restrict certain uses.

Provenance

Source

Geoscience Australia (GA), Commonwealth/State/Territory Governments, mining industry, universities, and Scripps Institution of Oceanography.

Collection Method

Standard processing of ground and airborne gravity measurements, terrain-corrected using bathymetry and topography data.

Time Range

Ground data from the 1940s to 2019, compiled as of September 2019.

Freshness

Last updated 2026-06-23 05:01:12.595564; freshness should be verified.

Geography

Australia and its continental margins.