5028 Block 2 (Southeast) Grid: Equivalent Air-Absorbed Dose Rate for the Narryer Survey

A geospatial grid of equivalent air-absorbed dose rate derived from gamma-ray spectrometric data for the Narryer survey area. The grid has a cell size of approximately 20 meters and was produced from 415,090 line-kilometres of data acquired in 2024 by the WA Government. Geoscience Australia processed and quality-checked the data, applying NASVD and standard reductions to isolate the terrestrial radiation signal.

Use Cases

• Map subsurface geological structure based on processed gamma-ray spectrometric data.
• Analyze natural radiation dose rates for environmental background studies based on the combined potassium, uranium, and thorium grids.
• Model terrestrial radiation exposure for regional planning based on the filtered total dose rate grid.
• Validate airborne geophysical survey methodologies based on the described NASVD and standard reduction processing.

Strengths

• Data volume is precisely quantified at 415,090 line-kilometres of acquired survey data.
• Processing methodology is described, including the application of NASVD, standard reductions, and a low-pass filter.
• Spatial resolution is specified as a cell size of approximately 20 meters.
• Data underwent quality checks by Geoscience Australia geophysicists to ensure it is fit-for-purpose.

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.
• The description metadata is limited to the survey and processing overview; specific data quality metrics require manual inspection.

Provenance

Source

Geoscience Australia Data

Collection Method

Airborne gamma-ray spectrometric survey processed with NASVD and standard reductions.

Time Range

Data acquired in 2024.

Freshness

Last updated 2026-05-14 08:46:44.252177; freshness should be verified.

Geography

Narryer survey area, specifically Block 2 (Southeast).