National Gravity Compilation 2019: First Vertical Derivative Grid of Australia

Gravity data processed via Fast Fourier Transform reveal changes in sub-surface rock density. This 2019 Australian National Gravity Grid has a cell size of approximately 435 meters. The processed data was quality-checked by Geoscience Australia geophysicists to ensure it is fit-for-purpose.

Use Cases

• Modeling sub-surface geological structures based on gravity anomaly data.
• Aiding mineral and resource exploration by interpreting density variations in the Earth's crust.
• Supporting geophysical research and education with a processed, national-scale gravity derivative grid.

Strengths

• Data underwent quality checks by Geoscience Australia geophysicists.
• Grid has a defined spatial resolution of approximately 435 meters (0.00417 degrees).
• Processing includes a Fast Fourier Transform (FFT) to calculate the first vertical derivative.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total dataset size are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Australian Ocean Data Network

Collection Method

Gravity survey data processed via standard methods and a Fast Fourier Transform (FFT).

Time Range

2019

Freshness

Last updated 2026-06-04 07:43:16.017914; freshness should be verified.

Geography

Australia