National Gravity Compilation 2019 (CSCBA)

A 2019 spherical cap Bouguer anomaly grid for Australia, derived from nearly 1.4 million gravity stations in the Australian National Gravity Database as of September 2019, supplemented with offshore global data. The grid has a cell size of 0.00417 degrees (approximately 435 meters) and data are provided in gravity units (um/s^2). This compilation was processed and quality-checked by Geoscience Australia geophysicists.

Use Cases

• Modeling subsurface geological structure based on gravity anomaly measurements.
• Regional geophysical interpretation for mineral or resource exploration based on density variations.
• Integrating terrestrial and marine gravity data for continental margin studies based on the combined onshore and offshore sources.
• Calibrating or validating satellite-derived gravity models using the ground-observed data mentioned in the description.

Strengths

• Derived from nearly 1.4 million gravity stations, providing dense ground-based coverage.
• Combines onshore data from the Australian National Gravity Database with offshore data from a global grid (v28.1) from Scripps, NOAA, and NGA.
• Processed and quality-checked by Geoscience Australia geophysicists to ensure data are fit-for-purpose.
• Provides a standardized spherical cap Bouguer anomaly grid with a defined resolution of approximately 435 meters.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Last updated 2026-05-14 09:23:31.376893; freshness should be verified.
• Data may reflect geographic bias inherent to the specific terrestrial and marine sources used.

Provenance

Source

Geoscience Australia Data, incorporating data from the Australian National Gravity Database and the Scripps Institution of Oceanography/NOAA/NGA global grid.

Collection Method

Ground gravity observations processed via standard methods and combined with offshore satellite/sea surface data to create a gravity anomaly grid.

Time Range

Data current as of September 2019.

Freshness

Last updated 2026-05 14 09:23:31.376893

Geography

Australia, including offshore areas.