National Gravity Compilation 2019: Airborne DGIR 1VD Image of Australia

A 2019 compilation of gravity data for Australia and its continental margins, derived from approximately 1.8 million ground and airborne observations. The dataset includes nearly 1.4 million ground stations and over 450,000 line kilometers of airborne gravity and gradiometry surveys, collected from the 1940s to 2019. It is processed by Geoscience Australia to produce a first vertical derivative image of de-trended global isostatic residual anomalies at a 435-meter cell size.

Use Cases

• Modeling subsurface geological structures based on gravity anomaly data.
• Enhancing mineral exploration targeting by identifying density contrasts in the crust.
• Integrating airborne and ground gravity data to improve resolution in areas with sparse ground coverage.

Strengths

• Integrates a large volume of data, including nearly 1.4 million ground stations and over 450,000 line km of airborne surveys.
• Data quality is checked by GA geophysicists to ensure it is fit-for-purpose.
• Provides high-resolution coverage with a grid cell size 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 from the 1940s onward.

Provenance

Source

Geoscience Australia, Commonwealth/State/Territory Governments, mining industry, universities, and global sources like Scripps Institution of Oceanography.

Collection Method

Processed from the Australian National Gravity Database and global grids, using standard geophysical methods and Fast Fourier Transform (FFT).

Time Range

1940s to 2019

Freshness

Last updated 2026-06-05 06:52:54.031563; freshness should be verified.

Geography

Australia and its continental margins