2019 B-Series De-trended Global Isostatic Residual Gravity Map of Australia

1.4 million ground gravity observations, 345,000 line km of airborne gravity, and 106,000 line km of gravity gradiometry data were combined to create this 2019 gravity map. The data, contributed by government, industry, and research organizations from the 1940s onward, is visualized as a Hue-Saturation-Intensity image. The map shows de-trended global isostatic residual gravity values from -500 to +500 µm.s⁻².

Use Cases

• Modeling subsurface density variations based on de-trended global isostatic residual gravity data.
• Integrating ground and airborne gravity surveys for regional geological mapping.
• Calibrating satellite-derived gravity models with high-resolution terrestrial and airborne observations.

Strengths

• Integrates a large volume of data: 1.4 million ground observations and 451,000 line km of airborne/gradiometry data.
• Combines multiple data sources including the Scripps Institution of Oceanography Global Gravity Grid.
• Data collection spans a long temporal range, from the 1940s to 2019.

Limitations

• Data is provided only in PDF format, limiting direct machine-readability and analysis.
• Column-level documentation and sample data are unavailable, requiring manual inspection after download.
• The last update date is listed as 2026-06-05, which may indicate a future date or require freshness verification.

Provenance

Source

Australian Ocean Data Network, combining the Australian National Gravity Database and National Australian Geophysical Database.

Collection Method

Combination of ground, airborne, and satellite-derived gravity measurements.

Time Range

1940s to 2019

Freshness

Last updated 2026-06-05 07:06:38.393283; freshness should be verified.

Geography

Australia