A gravity anomaly grid covering Australia and its continental margins derived from approximately 1.8 million gravity observations. The grid has a cell size of 0.00417 degrees (approximately 435m) and incorporates ground data from the 1940s to 2019, supplemented with offshore global data. It was processed by Geoscience Australia using terrain corrections and a tilt filter applied to Bouguer anomaly data.
Use Cases
- Model subsurface rock density variations based on gravity anomaly measurements.
- Interpret geological structure for mineral exploration based on processed gravity data.
- Integrate with other geospatial datasets for continental-scale geophysical analysis based on the grid's coverage.
- Study long-term changes in gravity measurements based on data spanning from the 1940s to 2019.
Strengths
- Derived from approximately 1.8 million gravity observations, with nearly 1.4 million stations from the Australian National Gravity Database.
- Station spacing varies from 11 km to less than 1 km, with major parts of the continent having spacing between 2.5 and 7 km.
- Incorporates data from multiple sources including Commonwealth, State, Territory Governments, industry, and universities over a long period.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Last updated 2026-05-05 00:11:53.130665; freshness should be verified.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Ground observations processed with standard methods, terrain corrections, and a tilt filter applied to Bouguer anomaly.
- Time Range
- 1940s to 2019
- Geography
- Australia and its continental margins