National Gravity Compilation 2019: DGIR 1VD Image of Australia

Australia's 2019 national gravity compilation integrates ground, airborne, and offshore data to model subsurface geology. It includes nearly 1.4 million ground stations and over 450,000 line kilometers of airborne gravity and gradiometry surveys, processed into a grid with a cell size of approximately 435 meters. The data, sourced from government, industry, and research organizations, spans from the 1940s to 2019.

Use Cases

• Map subsurface geological structures based on gravity anomaly data.
• Interpret density variations in the Earth's crust for mineral exploration.
• Integrate gravity data with other geophysical datasets for regional geological modeling.
• Analyze the first vertical derivative of de-trended global isostatic residual anomalies.

Strengths

• Integrates multiple data sources: nearly 1.4 million ground stations and over 450,000 line km of airborne surveys.
• Grid has a defined spatial resolution of approximately 435 meters.
• Data quality is checked by Geoscience Australia geophysicists, described as fit-for-purpose.

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 or source bias inherent to the compilation method.

Provenance

Source

Geoscience Australia Data, Commonwealth, State and Territory Governments, mining industry, universities, research organizations, Scripps Institution of Oceanography, NOAA, NGA.

Collection Method

Processed from ground observations, offshore global grids, and airborne surveys, using standard geophysical methods and FFT processing.

Time Range

1940s to 2019 (data acquisition), compiled as of September 2019.

Freshness

Last updated 2026-05-14 03:27:06.276847; freshness should be verified.

Geography

Australia and its continental margins.