5028 Block 1 (Southwest) Grid of Total Magnetic Intensity with RTP Applied

Western Australia's Narryer region features a processed geophysical grid of the Earth's magnetic field. The data consists of 415,090 line-kilometres of airborne survey data acquired in 2024 at 100m line spacing and 50m terrain clearance. Geoscience Australia processed and quality-checked the data, producing a first vertical derivative grid with a cell size of approximately 20 meters and units of nanoTesla per kilometer.

Use Cases

• Interpret subsurface geological structure based on magnetic anomalies.
• Support mineral exploration targeting based on magnetic susceptibility contrasts in rock.
• Calculate derivative grids for enhanced feature detection using the described Fast Fourier Transform process.
• Integrate with other geophysical datasets for regional geological modeling.

Strengths

• Data was acquired via a systematic airborne survey covering 415,090 line-kilometres.
• The grid has been processed with Reduction to Pole (RTP) and a first vertical derivative applied for interpretability.
• Data quality was checked by Geoscience Australia geophysicists to ensure it is fit-for-purpose.
• The 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 is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to the specific survey block in Western Australia.

Provenance

Source

Geoscience Australia Data, acquired by the WA Government.

Collection Method

Airborne magnetic survey, processed via standard methods including Fast Fourier Transform (FFT).

Time Range

2024

Freshness

Last updated 2026-05-14 09:04:15.155179; freshness should be verified.

Geography

Narryer region, Western Australia (5028 Block 1, Southwest).