National Gravity Compilation 2019 (CSCBA): Australian Subsurface Bouguer Anomaly Grid

National Gravity Compilation 2019 (CSCBA) is a spherical cap Bouguer anomaly grid for Australia, derived from approximately 1.4 million ground stations and offshore data. The grid has a cell size of 0.00417 degrees (approximately 435m) and data are provided in gravity units (um/s^2). It was processed by GA geophysicists and released by the Australian Ocean Data Network, with a last update recorded in June 2026.

Use Cases

• Modeling subsurface geological structure based on Bouguer anomaly values.
• Interpreting density variations in the Earth's crust for mineral exploration.
• Integrating gravity data with other geophysical datasets for regional studies.
• Calibrating or validating satellite-derived gravity measurements with ground observations.

Strengths

• Derived from nearly 1.4 million gravity stations from the Australian National Gravity Database.
• Grid cell size is precisely 0.00417 degrees (approximately 435 meters).
• Data underwent quality checking by GA geophysicists to ensure it is fit-for-purpose.
• Supplemented with offshore data from a global gravity grid developed by Scripps, NOAA, and NGA.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for some ML tasks.
• Freshness should be verified; the underlying gravity observations are from September 2019.

Provenance

Source

Australian Ocean Data Network, utilizing the Australian National Gravity Database and global data from Scripps Institution of Oceanography, NOAA, and NGA.

Collection Method

Ground gravity observations processed via standard methods and gridded, supplemented with offshore data.

Time Range

Gravity observations as of September 2019.

Freshness

Last updated 2026-06-27 17:29:21.645256; underlying observations are from September 2019.

Geography

Australia and surrounding offshore regions.