National Gravity Compilation 2019 with Airborne Tilt Image for Australia

A gravity anomaly grid for Australia and its continental margins, derived from approximately 1.8 million observations. The grid combines ground data from the Australian National Gravity Database, offshore data from global sources, and airborne gravity surveys totaling 451,000 line kilometers. Geoscience Australia compiled and quality-checked the data, which incorporates measurements from the 1940s to 2019.

Use Cases

• Model subsurface geological structures based on gravity anomaly data.
• Enhance mineral and resource exploration targeting using high-resolution airborne gravity and gradiometry data.
• Conduct geophysical research on continental margins using combined onshore and offshore gravity observations.
• Apply computer vision techniques to analyze the tilt filter image of Bouguer anomalies.

Strengths

• Integrates nearly 1.4 million ground stations with 451,000 line km of airborne surveys for broad coverage.
• Data quality is checked by GA geophysicists to ensure it is fit-for-purpose.
• Uses a high-resolution cell size of approximately 435 meters (0.00417 degrees).
• Incorporates data from multiple sources (government, industry, academia) spanning from the 1940s to 2019.

Limitations

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

Provenance

Source

Geoscience Australia Data

Collection Method

Processed from the Australian National Gravity Database and global grids, supplemented with airborne surveys.

Time Range

1940s to 2019 (observation period), compiled in 2019.

Freshness

Last updated 2026-03-25 15:36:57.868368; freshness should be verified.

Geography

Australia and its continental margins.