National Gravity Compilation 2019: Airborne DGIR 1VD Grid for Australia

A 2019 compilation of gravity data for Australia and its continental margins, derived from nearly 1.4 million ground stations and over 450,000 line km of airborne surveys collected from the 1940s onward. The grid, with a cell size of approximately 435 meters, shows the first vertical derivative of de-trended global isostatic residual anomalies. It was produced by Geoscience Australia from the Australian National Gravity Database and global offshore data.

Use Cases

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

Strengths

• Integrates a large volume of data, including nearly 1.4 million ground stations and over 450,000 line km of airborne surveys.
• Combines multiple data sources, including ground observations, offshore global grids, and airborne gravity gradiometry.
• Provides a processed, quality-checked grid with a defined spatial resolution of approximately 435 meters.
• Data collection spans a long temporal range, from the 1940s to the present day.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and exact file size are unknown, which may limit suitability assessment.
• The description is highly technical; domain expertise is required for effective use.

Provenance

Source

Geoscience Australia Data, incorporating data from Commonwealth, State, Territory Governments, industry, universities, and global institutions like Scripps Institution of Oceanography.

Collection Method

Processed from ground observations, airborne gravity and gradiometry surveys, and global offshore grids, using standard geophysical methods and Fast Fourier Transform (FFT).

Time Range

1940s to 2019

Freshness

Last updated 2026-04-20 03:46:50.778711; freshness should be verified.

Geography

Australia and its continental margins