National Gravity Compilation 2019 Tilt Image Covering Australia

Nearly 1.4 million gravity stations from the Australian National Gravity Database were used to generate this grid, supplemented with offshore data from Scripps Institution of Oceanography, NOAA, and NGA. The grid has a cell size of 0.00417 degrees (approximately 435m) and covers Australia and its continental margins. Ground data was acquired by government, industry, and research bodies from the 1940s to 2019.

Use Cases

• Model subsurface geological structures based on gravity anomaly data.
• Identify potential mineral or hydrocarbon resources based on density contrasts revealed by the tilt filter.
• Integrate gravity data with other geophysical datasets for continental-scale geological mapping.
• Study crustal thickness and tectonic features based on the processed Bouguer anomaly.

Strengths

• Derived from nearly 1.4 million gravity stations from a national database.
• Grid cell size of approximately 435 meters provides high spatial resolution.
• Incorporates data from multiple authoritative sources including government and research institutions.
• Data quality was checked by GA geophysicists to ensure it is 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 from multiple projects over decades.

Provenance

Source

Australian Ocean Data Network, incorporating data from Commonwealth, State, and Territory Governments, industry, universities, and global sources.

Collection Method

Ground and offshore gravity observations processed into a spherical cap Bouguer anomaly grid with a tilt filter applied.

Time Range

1940s to 2019

Freshness

Last updated 2026-06-23 03:31:02.683906; freshness should be verified.

Geography

Australia and its continental margins