5028 Block 2 (Southeast) Grid of Total Magnetic Intensity with RTP

Geoscience Australia Data released a grid of Total Magnetic Intensity (TMI) data with Reduction to Pole (RTP) applied for the Narryer region. The grid has a cell size of approximately 20 meters and units of nanoTesla per km, derived from 415,090 line-kilometres of data acquired in 2024 by the WA Government. The data was processed via Fast Fourier Transform (FFT) to calculate the first vertical derivative and checked for quality by GA geophysicists.

Use Cases

• Map subsurface geological structures based on magnetic anomaly variations.
• Support mineral exploration efforts based on processed magnetic intensity data.
• Analyze regional crustal composition based on total magnetic intensity measurements.
• Validate geophysical models based on quality-checked, RTP-processed grid data.

Strengths

• Data is quality-checked by GA geophysicists to be fit-for-purpose.
• Based on 415,090 line-kilometres of data acquired in 2024.
• Grid has a fine spatial resolution of approximately 20 meters per cell.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to data_gov_au, focusing on a specific Australian block.

Provenance

Source

Geoscience Australia Data

Collection Method

Acquired via airborne survey by the WA Government, processed via Fast Fourier Transform (FFT).

Time Range

Data acquired in 2024.

Freshness

Last updated 2026-05-14 03:53:30.772391; freshness should be verified.

Geography

Narryer region, specifically the 5028 Block 2 (Southeast) grid in Australia.