Australia's gravity anomalies are visualized in a Hue-Saturation-Intensity image derived from the 2019 B-Series National Gravity Grids. The map combines over 1.4 million ground observations, 345,000 line km of airborne gravity, and 106,000 line km of gradiometry data, supplemented by a global gravity grid. Data collection spans from the 1940s to 2019, sourced from government, industry, and research organizations.
Use Cases
- Analyzing subsurface geological structures based on gravity anomaly patterns.
- Mapping mineral exploration targets based on regional gravity variations.
- Integrating gravity data with other geophysical datasets for geological modeling.
- Studying crustal density variations and isostatic adjustments across Australia.
- Visualizing geophysical data for educational or public outreach purposes.
Strengths
- Integrates over 1.4 million ground gravity observations.
- Combines 345,000 line km of airborne gravity and 106,000 line km of gravity gradiometry data.
- Data collection spans from the 1940s to 2019, providing a long temporal range.
- Utilizes a global gravity grid developed by Scripps Institution of Oceanography.
Limitations
- Description metadata is limited; actual data quality requires manual inspection after download.
- Column-level documentation is absent; field semantics must be inferred after download.
- The primary file format is PDF, which may limit direct computational analysis.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Combination of ground, airborne, and gradiometry observations, plus a global grid.
- Time Range
- 1940s to 2019
- Geography
- Australia