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

From the 1940s to the present day, this dataset combines over 1.4 million ground gravity observations, 345,000 line km of airborne gravity, and 106,000 line km of gravity gradiometry data. It is presented as a Hue-Saturation-Intensity (HSI) image of De-trended Global Isostatic Residual Gravity data, based on the 2019 Australian National Gravity Grids. The image uses a linear color scale from -500 to +500 µm.s⁻² to visualize gravity anomalies across Australia.

Use Cases

• Mineral and resource exploration based on gravity anomaly mapping.
• Geological structure and crustal thickness modeling based on isostatic residual gravity data.
• Integrating ground, airborne, and marine gravity surveys for continental-scale geophysical studies.
• Computer vision analysis of geophysical features using the provided HSI image format.

Strengths

• Combines a large volume of data: 1.4 million ground observations and 451,000 line km of airborne and gradiometry data.
• Integrates data from multiple sources and decades, providing a long-term view from the 1940s onward.
• Represents a national-scale, standardized gravity grid for Australia.

Limitations

• Metadata completeness is low: specific column names, row counts, file size, license, and author information are not provided.
• The primary data format listed is PDF, which may limit direct computational analysis compared to raster or tabular formats.
• Conflicting 'last updated' dates (2026-04-30 and 2026-04-20) suggest potential metadata inconsistency.

Provenance

Source

Geoscience Australia Data, incorporating data from Commonwealth, State/Territory Governments, industry, universities, and Scripps Institution of Oceanography.

Collection Method

Combination of ground observations, airborne surveys, gravity gradiometry, and a global gravity grid, processed to create a de-trended isostatic residual grid.

Time Range

1940s to present (2019 grid compilation date).

Freshness

Last updated metadata indicates a date in 2026-04, though this may be a placeholder or future date.

Geography

Australia