National Gravity Compilation 2019 DGIR Tilt Image of Australia

Nearly 1.4 million gravity stations from the Australian National Gravity Database, supplemented by offshore data, were used to generate this grid. The processed data, checked for quality by GA geophysicists, reveals geological structures beneath the Earth's surface. This DGIR tilt image, derived from the 2019 Australian National Gravity Grids A series, has a cell size of approximately 435 meters.

Use Cases

• Edge detection of geological units based on the tilt filter applied to gravity anomalies.
• Mapping subsurface density variations based on processed gravity anomaly data.
• Integrating ground and marine gravity data for continental-scale geological interpretation.

Strengths

• Derived from nearly 1.4 million gravity stations in the Australian National Gravity Database.
• Grid cell size of 0.00417 degrees (approximately 435m) provides a detailed spatial resolution.
• Data quality was checked by GA geophysicists to ensure fitness-for-purpose.

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 Commonwealth, State/Territory Governments, industry, universities, and global sources.

Collection Method

Ground and marine gravity observations processed via standard methods and FFT-based tilt filtering.

Time Range

Data collected from the 1940s to September 2019.

Freshness

Last updated 2026-06-27 21:01:44.682291; freshness should be verified.

Geography

Australia and its continental margins.