Western Australia Onshore and Marine Magnetic Intensity Grid at 0.0025-Degree Resolution

Geoscience Australia Data provides a total magnetic intensity (TMI) grid for Western Australia, including onshore and marine areas. The grid has a cell size of 0.0025 degrees (approximately 266 meters) and its units are in nanoTesla (nT). The underlying survey data was acquired in 2005 by the WA Government.

Use Cases

• Map subsurface geological structures based on magnetic anomaly patterns.
• Identify mineral resource potential based on magnetic susceptibility contrasts in rock.
• Integrate magnetic data with other geophysical surveys for regional geological modeling.
• Assess crustal composition and tectonic features based on processed magnetic intensity variations.

Strengths

• Data is processed via standard methods and quality-checked by GA geophysicists to be fit-for-purpose.
• Grid provides a consistent resolution of 0.0025 degrees across both onshore and marine areas of Western Australia.

Limitations

• The specific line-kilometres, line spacing, and terrain clearance of the source survey are not provided.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect geographic and temporal bias inherent to the 2005 survey.

Provenance

Source

Geoscience Australia Data

Collection Method

Acquired via airborne or marine magnetic survey by the WA Government in 2005, processed via standard geophysical methods.

Time Range

Survey data acquired in 2005.

Freshness

Last updated 2026-05-14 05:16:58.013322; freshness should be verified.

Geography

Western Australia, including onshore and marine areas.