5028 Block 1 (Southwest) Grid: Equivalent Air-Absorbed Dose Rate for Narryer Survey

Geoscience Australia Data provides a processed radiometric grid showing the equivalent air-absorbed dose rate for the Narryer survey area. The grid has a cell size of approximately 20 meters and is derived from 415,090 line-kilometres of airborne gamma-ray spectrometric data acquired in 2024 by the WA Government. The data is processed with NASVD and standard reductions to isolate the terrestrial radiation component from potassium, uranium, and thorium decay.

Use Cases

• Geological structure mapping based on processed gamma-ray spectrometry data.
• Environmental radiation background assessment based on the total terrestrial and cosmic dose rate.
• Mineral exploration targeting based on the filtered potassium, uranium, and thorium grids mentioned in the description.
• Validating airborne geophysical survey processing techniques based on the application of NASVD and standard reductions.

Strengths

• Data is quality-checked by GA geophysicists to ensure it is fit-for-purpose.
• Derived from a substantial 415,090 line-kilometres of airborne survey data.
• Processing includes specific methods like NASVD and a low-pass filter to generate the final grid.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for certain analyses.

Provenance

Source

Geoscience Australia Data, WA Government

Collection Method

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

Time Range

Data acquired in 2024.

Freshness

Last updated 2026-05 14 08:54:40.510811; freshness should be verified.

Geography

Narryer survey area, specifically the 5028 Block 1 (Southwest) grid.