Approximately 1.8 million gravity observations, including nearly 1.4 million ground stations and 345,000 line km of airborne gravity surveys, were processed to create this grid. The Australian Ocean Data Network released this dataset, which combines ground data from the 1940s onward with offshore data from global sources. The grid shows the half derivative of complete Bouguer anomalies over Australia and its continental margins, with a cell size of approximately 435 meters.
Use Cases
- Model subsurface geological structures based on gravity anomaly data.
- Identify potential mineral deposits based on density variations revealed by the gravity grid.
- Integrate gravity data with other geophysical datasets for continental-scale geological mapping.
- Analyze terrain corrections applied using offshore bathymetry and onshore topography data.
Strengths
- Derived from approximately 1.8 million gravity observations, including nearly 1.4 million ground stations.
- Incorporates 345,000 line km of airborne gravity surveys and 106,000 line km of airborne gravity gradiometry.
- Data quality checked by GA geophysicists to ensure fitness for purpose.
- Station spacing varies from 11 km to less than 1 km, with major parts of the continent between 2.5 and 7 km.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Processed from ground observations in the Australian National Gravity Database (ANGD) as of September 2019, supplemented by offshore data from the Global Gravity grid.
- Time Range
- Ground data acquired from the 1940s to present day, compiled in 2019.
- Freshness
- Last updated 2026-04-16 14:40:17.980742; freshness should be verified.
- Geography
- Australia and its continental margins.