National Gravity Compilation 2019 DGIR Tilt Image of Australia

A geospatial grid of de-trended global isostatic residual (DGIR) tilt anomalies derived from gravity data across Australia and its continental margins. The grid is based on nearly 1.4 million gravity stations from the Australian National Gravity Database and offshore sources, with ground observations collected from the 1940s to 2019. It has a cell size of approximately 435 meters and was processed by Geoscience Australia geophysicists.

Use Cases

• Edge detection of geological units based on the tilt filter applied to gravity anomalies.
• Subsurface density structure analysis based on gravity anomaly data.
• Geological mapping and interpretation based on processed gravity grids.
• Integration with other geophysical datasets for resource exploration based on the continental-scale coverage.

Strengths

• Based on nearly 1.4 million gravity station observations.
• Grid cell size of approximately 435 meters provides regional detail.
• Data quality was checked by Geoscience Australia geophysicists.
• Incorporates ground data collected from the 1940s to present day.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-06-04 06:02:14.985474; freshness should be verified.

Provenance

Source

Australian Ocean Data Network, Geoscience Australia

Collection Method

Processed from ground observations in the Australian National Gravity Database and offshore global gravity data.

Time Range

Ground observations from 1940s to 2019.

Freshness

Last updated 2026-06-04 06:02:14.985474

Geography

Australia and its continental margins.