5028 Block 4 (Northeast) Grid: Equivalent Air-Absorbed Dose Rate for Narryer Survey

Narryer survey data from Western Australia provides a grid of equivalent air-absorbed dose rate derived from gamma-ray spectrometry. The grid has a cell size of approximately 20 meters and is based on 415,090 line-kilometres of data acquired in 2024 by the WA Government. Processed by Geoscience Australia, the data represents total dose rate from natural potassium, uranium, and thorium decay, combined with cosmic dose estimates.

Use Cases

• Map natural radiation levels based on the total dose rate grid derived from K, U, and Th measurements.
• Model subsurface geological structure based on processed gamma-ray spectrometric data.
• Assess environmental background radiation based on the terrestrial and cosmic dose rate estimates.

Strengths

• Data quality is explicitly checked by GA geophysicists to ensure it is fit-for-purpose.
• Based on 415,090 line-kilometres of aerial survey data collected in 2024.
• Processing includes standard methods, NASVD, and low-pass filtering to isolate geological signal.

Limitations

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

Provenance

Source

Geoscience Australia Data

Collection Method

Aerial gamma-ray spectrometric survey at 100m line spacing and 50m terrain clearance.

Time Range

Data acquired in 2024.

Freshness

Last updated 2026-05-14 03:11:12.168904; freshness should be verified.

Geography

Narryer survey area, Western Australia (Block 4, Northeast).