Complete Bouguer Gravity Anomaly Image of Onshore Australia 2016

Australian Ocean Data Network provides a colour composite image of complete Bouguer gravity anomalies over onshore continental Australia. The product integrates approximately 1.39 million gravity station observations from the Australian National Gravity Database and the 2013 New South Wales Riverina survey. Data acquisition spans from the 1940s to February 2016.

Use Cases

• Analyze spatial patterns in the complete Bouguer anomaly values to infer subsurface geological structures.
• Apply sun-shading and HSI image enhancement techniques to highlight subtle gravity gradient features for interpretation.
• Correlate terrain-corrected gravity anomalies with other geospatial layers like topography or bathymetry for integrated modeling.
• Use the 2016 grid as a regional baseline for comparing newer gravity surveys or monitoring temporal changes in specific areas.

Strengths

• Integrates 1,371,998 gravity stations from the national database plus 19,558 from a dedicated regional survey.
• Applies terrain corrections using both offshore bathymetry and onshore topography data.
• Data collection represents a long-term effort spanning from the 1940s to 2016.

Limitations

• Primary data format is a processed image (PDF/ZIP), limiting direct access to the raw numerical grid values.
• Spatial coverage is limited to onshore continental Australia, excluding offshore regions.
• The underlying gravity station data may have variable resolution and accuracy across different regions and time periods.

Provenance

Source

Australian Ocean Data Network, using the Australian National Gravity Database.

Collection Method

Derived from gravity observations, processed with terrain corrections and spherical cap Bouguer anomaly calculations, then image-enhanced.

Time Range

1940s to February 2016.

Freshness

Data snapshot is from February 2016, with a product last updated date listed as 2026-04-04.

Geography

Onshore continental Australia.