5028 Block 4 (Northeast) Grid of Total Magnetic Intensity (TMI) with Reduction to Pole (RT

Narryer region in Western Australia features a processed geophysical grid of the Earth's magnetic field. The dataset contains a first vertical derivative grid of Total Magnetic Intensity with Reduction to Pole applied, with a cell size of approximately 20 meters and units of nanoTesla per km. Geoscience Australia processed and quality-checked the data, which was acquired in 2024 by the WA Government from 415,090 line-kilometres of airborne survey.

Use Cases

• Interpret subsurface geological structure based on magnetic anomaly patterns.
• Model rock susceptibility and mineral content from magnetic intensity variations.
• Integrate processed magnetic data with other geophysical surveys for regional exploration.

Strengths

• Data processed via standard methods and quality-checked by GA geophysicists to be fit-for-purpose.
• Survey acquired 415,090 line-kilometres of data at 100m line spacing and 50m terrain clearance in 2024.
• Grid has a fine spatial resolution with a cell size of approximately 20 meters.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total file size are unknown, which may limit suitability assessment.

Provenance

Source

Geoscience Australia Data

Collection Method

Airborne magnetic survey processed via Fast Fourier Transform (FFT) to calculate the first vertical derivative grid.

Time Range

2024

Freshness

Last updated 2026-05-14 09:08:52.514845; freshness should be verified.

Geography

Narryer region, Western Australia (5028 Block 4, Northeast)