National Gravity Compilation 2019: CSCBA 0.5VD Image of Australia

Geoscience Australia Data released the National Gravity Compilation 2019 - CSCBA 0.5VD image, a processed gravity anomaly grid. The grid is derived from nearly 1.4 million ground stations and over 450,000 line km of airborne surveys, with data collected from the 1940s to 2019. It covers Australia and its continental margins with a cell size of approximately 435 meters.

Use Cases

• Map subsurface geological structures based on gravity anomaly data.
• Support mineral and resource exploration by identifying density contrasts in the crust.
• Integrate with other geophysical datasets for regional geological modeling.
• Calculate terrain corrections for gravity surveys using the described bathymetry and topography data.

Strengths

• Integrates a large volume of observations, including nearly 1.4 million ground stations and over 450,000 line km of airborne surveys.
• Data collection spans a long temporal range from the 1940s to 2019.
• Processing includes terrain corrections using both offshore bathymetry and onshore topography.
• Grid has a defined spatial resolution of approximately 435 meters.

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 and temporal bias inherent to the aggregation of surveys over decades.

Provenance

Source

Geoscience Australia Data, supplemented by global data from Scripps Institution of Oceanography, NOAA, and NGA.

Collection Method

Ground and airborne gravity surveys processed via standard methods and FFT to create a half vertical derivative grid.

Time Range

1940s to 2019 (with grid derived from data as of September 2019).

Freshness

Last updated 2026-05-14 09:41:59.094341; freshness should be verified.

Geography

Australia and its continental margins.