Western Australia Total Magnetic Intensity Grid at 80m Resolution

Western Australia's total magnetic intensity (TMI) data merges onshore and offshore magnetic anomaly measurements. The dataset integrates over 1600 open-file company surveys and government data acquired with line spacings of 500 metres or less, using the 2015 Geoscience Australia magnetic grid as a base reference.

Use Cases

• Map subsurface geological structures by analyzing spatial variations in total magnetic intensity values.
• Interpret magnetic anomaly patterns to support mineral exploration targeting within Western Australia.
• Integrate the TMI grid with other geoscientific layers for regional geological modeling and assessment.

Strengths

• Integrates data from over 1600 distinct open-file company survey datasets.
• Compiled from Federal and State government data acquired with a consistent line spacing of 500 metres or less.
• Uses the authoritative Geoscience Australia magnetic grid of Australia V6 2015 as a base reference.

Limitations

• Data density and quality are heterogeneous, relying on the integration of numerous disparate source surveys.
• Background areas are filled with lower-resolution base grid data where closer-spaced survey data is unavailable.

Provenance

Source

Department of Energy, Mines, Industry Regulation and Safety (Chief Geophysicist).

Collection Method

Merged from Federal, State, and over 1600 open-file company magnetic survey datasets.

Time Range

Base reference grid is from 2015; compiled dataset version is 2020.

Freshness

Grid version is from 2020, though platform metadata was updated in 2026.

Geography

Western Australia, including both onshore and offshore regions.