National Gravity Compilation 2019 DGIR Image: Gravity Anomaly Grid of Australia

A 2019 compilation of gravity data for Australia and its continental margins, derived from nearly 1.4 million ground stations and supplemented by offshore data. The grid has a cell size of approximately 435 meters and shows de-trended global isostatic residual anomalies. Data was compiled by Geoscience Australia from observations collected by government, industry, and research organizations from the 1940s to 2019.

Use Cases

• Modeling subsurface geological structures based on gravity anomaly data.
• Resource exploration targeting based on density variations in the Earth's crust.
• Geophysical research and education using a nationally consistent gravity grid.
• Integrating gravity data with other geospatial datasets for regional geological studies.

Strengths

• Derived from nearly 1.4 million gravity stations, indicating a dense observational foundation.
• Station spacing for ground observations varies from 11 km down to less than 1 km, with major parts of the continent between 2.5 and 7 km.
• Data quality was checked by GA geophysicists to ensure it is fit-for-purpose.
• Incorporates offshore data from a global gravity grid developed by Scripps Institution of Oceanography, 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.
• Last updated 2026-04-30 15:06:32.725194; freshness should be verified.

Provenance

Source

Geoscience Australia Data

Collection Method

Processed from ground observations in the Australian National Gravity Database and offshore data from a global grid.

Time Range

1940s to 2019

Freshness

2026-04-30 15:06:32.725194

Geography

Australia and its continental margins