2019 gravity anomaly grid derived from approximately 1.8 million observations, including nearly 1.4 million ground stations and 451,000 line km of airborne surveys. The Australian Ocean Data Network processed data from the Australian National Gravity Database and global sources to create a half vertical derivative of complete Bouguer anomalies. Ground data was collected by government, industry, and research organizations from the 1940s to present day.
Use Cases
- Map subsurface geological structures based on gravity anomaly patterns.
- Support mineral and resource exploration by interpreting density variations in the crust.
- Integrate with other geophysical datasets for continental-scale geological modeling.
- Calculate terrain corrections for gravity surveys using the described bathymetry and topography data.
- Apply Fourier transform methods for derivative analysis of gravity fields.
Strengths
- Incorporates approximately 1.8 million gravity observations from multiple sources.
- Uses ground station data with spacing from 11 km down to less than 1 km across major parts of the continent.
- Combines ground, airborne gravity (345,000 line km), and airborne gravity gradiometry (106,000 line km) surveys.
- Processed and quality-checked by GA geophysicists to ensure fitness for purpose.
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/temporal bias inherent to data_gov_au.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Derived from the 2019 Australian National Gravity Grids A series, processed from the Australian National Gravity Database and global gravity grids.
- Time Range
- Ground data collected from the 1940s to present day; grid compiled as of September 2019.
- Freshness
- Last updated 2026-04-16 14:32:57.633050; freshness should be verified.
- Geography
- Australia and its continental margins.