Data

5028 Block 1 (Southwest) reduced radiometric point-located data

Geoscience Australia
Geophysical Acquisition & Processing Section
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26186/151030&rft.title=5028 Block 1 (Southwest) reduced radiometric point-located data&rft.identifier=10.26186/151030&rft.publisher=Commonwealth of Australia (Geoscience Australia)&rft.description=GENERAL The radiometric, or gamma-ray spectrometric, method measures the natural variations in the gamma-rays originating from the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). Radiometric data has many uses including geological mapping, mineral exploration, and environmental studies. REDUCED DATA The reduced point-located data are processed using standard methods to highlight the concentrations of each radioelement (K, U, Th) in the ground surface. The following reductions are applied: 1. Noise-Adjusted Singular Value Decomposition (NASVD) filtering. 2. Corrections for live time, background (cosmic, aircraft and radon) removal, stripping, height attenuation and window sensitivity. 3. Tie-line levelling. 4. Micro-levelling. This 5028 Block 1 (Southwest) reduced radiometric point-located data were acquired in 2024 by the WA Government, and consisted of 415090 line-kilometres of data at 100m line spacing and 50m terrain clearance.Maintenance and Update Frequency: asNeededStatement: This 5028 Block 1 (Southwest) reduced radiometric point-located data is an airborne-derived radiometric data for the Narryer. The data was acquired under the project No. 5028 for the geological survey of WA. A total of 415090 line-kilometres of data at a line spacing of 100m were acquired during this survey. Noise-adjusted singular value decomposition (NASVD) has been applied to the data. NASVD is a spectral component analysis procedure for the removal of noise from gamma-ray spectra. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134. Reference: Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2026&rft.coverage=westlimit=115.72897923779163; southlimit=-27.014748263873194; eastlimit=116.7440685305346; northlimit=-25.8507804144769; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=115.72897923779163; southlimit=-27.014748263873194; eastlimit=116.7440685305346; northlimit=-25.8507804144769; projection=GDA94 (EPSG:4283)&rft_rights=Creative Commons Attribution 4.0 International Licence https://creativecommons.org/licenses/by/4.0/&rft_rights=© Commonwealth of Australia (Geoscience Australia) and State of Western Australia (Department of Mines, Industry Regulation and Safety) 2026&rft_rights=Australian Government Security Classification System https://www.protectivesecurity.gov.au/publications-library/policy-8-classification-system&rft_subject=geoscientificInformation&rft_subject=EARTH SCIENCES&rft_subject=Earth sciences&rft_subject=geophysics&rft_subject=line&rft_subject=Australia&rft_subject=WA&rft_subject=survey 5028&rft_subject=GADDS2.0&rft_subject=radiometrics&rft_subject=gamma-ray&rft_subject=spectrometry&rft_subject=NASVD&rft_subject=potassium&rft_subject=thorium&rft_subject=uranium&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=point-located&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution 4.0 International Licence
https://creativecommons.org/licenses/by/4.0/

© Commonwealth of Australia (Geoscience Australia) and State of Western Australia (Department of Mines, Industry Regulation and Safety) 2026

Australian Government Security Classification System
https://www.protectivesecurity.gov.au/publications-library/policy-8-classification-system

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Full description

GENERAL
The radiometric, or gamma-ray spectrometric, method measures the natural variations in the gamma-rays originating from the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). Radiometric data has many uses including geological mapping, mineral exploration, and environmental studies.

REDUCED DATA
The reduced point-located data are processed using standard methods to highlight the concentrations of each radioelement (K, U, Th) in the ground surface.
The following reductions are applied:
1. Noise-Adjusted Singular Value Decomposition (NASVD) filtering.
2. Corrections for live time, background (cosmic, aircraft and radon) removal, stripping, height attenuation and window sensitivity.
3. Tie-line levelling.
4. Micro-levelling.

This 5028 Block 1 (Southwest) reduced radiometric point-located data were acquired in 2024 by the WA Government, and consisted of 415090 line-kilometres of data at 100m line spacing and 50m terrain clearance.

Lineage

Maintenance and Update Frequency: asNeeded
Statement: This 5028 Block 1 (Southwest) reduced radiometric point-located data is an airborne-derived radiometric data for the Narryer. The data was acquired under the project No. 5028 for the geological survey of WA. A total of 415090 line-kilometres of data at a line spacing of 100m were acquired during this survey. Noise-adjusted singular value decomposition (NASVD) has been applied to the data. NASVD is a spectral component analysis procedure for the removal of noise from gamma-ray spectra. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134. Reference: Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).

Notes

Purpose
Magnetic and radiometric data are types of geophysical information primarily used to map geology. The data will have applications in mineral, energy, and groundwater exploration as well as environmental studies.

Issued: 05 05 2026

Data time period: 2026-02-25 to 2026-02-25

This dataset is part of a larger collection

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116.74407,-25.85078 116.74407,-27.01475 115.72898,-27.01475 115.72898,-25.85078 116.74407,-25.85078

116.23652388416,-26.432764339175

text: westlimit=115.72897923779163; southlimit=-27.014748263873194; eastlimit=116.7440685305346; northlimit=-25.8507804144769; projection=GDA94 (EPSG:4283)

Subjects
Australia | EARTH SCIENCES | Earth sciences | GADDS2.0 | NASVD | Published_External | WA | airborne digital data | gamma-ray | geophysical survey | geophysics | geoscientificInformation | line | point-located | potassium | radiometrics | spectrometry | survey 5028 | thorium | uranium |

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Other Information
The Geophysical Archive Data Delivery System (GADDS2) portal provides HTTP download of geophysics datasets in a number of formats. Point and line datasets are available in NetCDF and ASEG-GDF2. Grid datasets are available in NetCDF, GeoTIFF and ERS. (File available for download in various formats from the GADDS2 portal)

url : https://portal.ga.gov.au/persona/gadds

File download for 5028 Block 1 (Southwest) reduced radiometric point-located data (5028 Block 1 (Southwest) reduced radiometric point-located data file download)

url : https://thredds.nci.org.au/thredds/fileServer/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/line/P5028/P5028_1_radiometrics_reduced.nc

OPeNDAP web service for 5028 Block 1 (Southwest) reduced radiometric point-located data (5028 Block 1 (Southwest) reduced radiometric point-located data OPeNDAP)

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/line/P5028/P5028_1_radiometrics_reduced.nc.html

5028 Block 1 (Southwest) reduced radiometric point-located data OPeNDAP

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/line/P5028/P5028_1_radiometrics_reduced.nc.html

Identifiers
ACN 633 798 857