National Gravity Compilation 2019: DGIR 1VD Grid for Australia

Nearly 1.8 million gravity observations, including 1.4 million ground stations and 451,000 line km of airborne data, were used to create this 2019 grid. The Australian Commonwealth, State, Territory Governments, industry, and research organizations collected the data from the 1940s onward. It shows the first vertical derivative of de-trended global isostatic residual anomalies over Australia and its continental margins.

Use Cases

• Model subsurface density contrasts based on the first vertical derivative of gravity anomalies.
• Interpret geological structures for mineral exploration based on airborne and ground gravity data.
• Integrate gravity data with other geophysical datasets for continental-scale geological mapping.

Strengths

• Integrates nearly 1.8 million observations from ground and airborne sources.
• Data collection spans from the 1940s to the present day, providing historical depth.
• Grid cell size of 0.00417 degrees (approximately 435m) offers regional detail.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Australian Ocean Data Network, incorporating data from the Australian National Gravity Database and global sources.

Collection Method

Processed from ground observations, offshore global grids, and airborne gravity and gradiometry surveys.

Time Range

1940s to 2019

Freshness

Last updated 2026-06-04 05:47:17.683974; freshness should be verified.

Geography

Australia and its continental margins