Western Australia Magnetic Intensity Grid with 266m Cell Size

Total magnetic intensity (TMI) data measures variations in the Earth's magnetic field caused by rock-forming minerals. This grid covers Western Australia onshore and marine areas with a cell size of 0.0025 degrees (approximately 266m) and units in nanoTesla. The data was acquired in 2005 by the WA Government and processed by GA geophysicists.

Use Cases

• Map subsurface geological structure based on magnetic anomaly patterns.
• Identify mineral deposits based on magnetic susceptibility contrasts in rock.
• Integrate magnetic data with other geophysical surveys for regional geological modeling.
• Study crustal composition and structure based on processed total magnetic intensity data.

Strengths

• Data processed via standard methods to isolate the response from rocks in the ground.
• Quality checked by GA geophysicists to ensure data is fit-for-purpose.
• Grid has a defined spatial resolution of 0.0025 degrees (approximately 266m).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The description states the acquisition consisted of 'None line-kilometres' and 'Nonem' spacing/clearance, indicating specific acquisition details are missing.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

WA Government, processed by GA (likely Geoscience Australia).

Collection Method

Acquired via airborne or marine magnetic survey, processed via standard geophysical methods.

Time Range

Data acquired in 2005.

Freshness

Last updated 2026-04-16 14:29:06.024278; freshness should be verified.

Geography

Western Australia onshore and marine areas.