5028 Block 3 (Northwest) Grid: Total Radiometric Dose Rate for Narryer Survey

415,090 line-kilometres of radiometric data were acquired in 2024 by the WA Government to produce this grid. The dataset shows the total equivalent air-absorbed dose rate for the Narryer survey area, derived from potassium, uranium, and thorium measurements. Processed and quality-checked by Geoscience Australia geophysicists, the grid has a cell size of approximately 20 meters.

Use Cases

• Model subsurface geological structure based on gamma-ray spectrometry data.
• Map natural radiation levels for environmental or public health studies based on the total dose rate grid.
• Analyze the distribution of potassium, uranium, and thorium for mineral exploration based on the derived terrestrial dose.
• Validate geophysical processing techniques based on the application of NASVD and standard reduction methods mentioned.

Strengths

• Data collection scale is precisely quantified at 415,090 line-kilometres.
• Acquisition parameters are specified: 100m line spacing and 50m terrain clearance.
• Processing includes quality checks by GA geophysicists and application of NASVD and standard reductions.
• Spatial resolution is defined as approximately 20 meters per grid cell.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Freshness should be verified despite the 2026 metadata update; the underlying data was acquired in 2024.

Provenance

Source

Geoscience Australia Data

Collection Method

Airborne gamma-ray spectrometric survey processed via standard methods and low-pass filtering.

Time Range

Data acquired in 2024.

Freshness

Last updated 2026-05-14 09:20:27.552066; underlying data acquired in 2024.

Geography

Narryer survey area, specifically the 5028 Block 3 (Northwest) Grid.