National Gravity Compilation 2019 DGIR 0.5VD Image: Australian Subsurface Geology
Updated 1mo ago
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Description
Approximately 1.8 million gravity observations, including nearly 1.4 million ground stations from the Australian National Gravity Database, were used to generate this grid. The data, acquired by government, industry, and research bodies from the 1940s to 2019, were processed to produce a half vertical derivative of de-trended global isostatic residual anomalies. This image grid, with a cell size of approximately 435 meters, reveals geological structures beneath Australia and its continental margins.
Use Cases
Map subsurface geological structures based on processed gravity anomaly data.
Identify potential mineral deposits based on density variations in the Earth's crust.
Support regional geological modeling based on continent-wide gravity station data.
Integrate gravity data with other geophysical datasets for comprehensive subsurface analysis.
Strengths
Derived from approximately 1.8 million gravity observations, including nearly 1.4 million ground stations.
Data quality was checked by GA geophysicists to ensure fitness for purpose.
Station spacing varies from 11 km to less than 1 km, with major parts of the continent covered at 2.5 to 7 km intervals.
Incorporates data from multiple sources, including government, industry, universities, and offshore global grids.
Limitations
Column-level documentation is absent; field semantics must be inferred after download.
Row count is unknown, which may limit suitability assessment.
Last updated 2026-05-05 00:36:26.078052; freshness should be verified.
Provenance
Source
Australian Ocean Data Network, incorporating data from the Australian National Gravity Database and global grids from Scripps Institution of Oceanography, NOAA, and NGA.
Collection Method
Ground and marine gravity observations processed via standard methods, including Fast Fourier Transform (FFT).
Time Range
Data acquired from the 1940s to September 2019.
Geography
Australia and its continental margins.
File formats include APPLICATION/X-NETCDF, which may require specialized geospatial software for analysis.