GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic  


Authors / CoAuthors

Geophysical Acquisition & Processing Section

Abstract

This GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic is an airborne-derived radiometric Potassium, Thorium and Uranium data over a sun shaded total count radiometric data for the Heathcote, Vic, 1988 (GSV0360). The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of uranium (K), uranium (U) and uranium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic has a cell size of 0.0005 degrees (approximately 50m). The data used to produce this grid was acquired in 1988 by the VIC Government, and consisted of 3040 line-kilometres of data at 200m line spacing and 70m terrain clearance. The grid was produced by applying the colours red to the Potassium ground concentration, green to the Thorium concentration and blue to the Uranium concentration. The colours were clipped to a 99% linear scale. These colours were transparent over a shaded Total Count. This clipping will necessarily introduce some artefacts into the ratio grids in areas of very low radioelement concentrations. The 3-band image was superposed on the sun shaded TC grid of the same survey to produce the final image.

Product Type

dataset

eCat Id

143819

Contact for the resource

  Point of contact

Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

Keywords

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES
( Data centre )
  • NCI
( Discipline )
  • Earth sciences
( Discipline )
  • geophysics
( Feature type )
  • grid
( Place )
  • Australia
( Place )
  • VIC
( Project )
  • survey 1520
( Theme )
  • GADDS2.0
( Theme )
  • radiometrics
( Theme )
  • NASVD
( Theme )
  • potassium
( Theme )
  • thorium
( Theme )
  • uranium
( Theme )
  • total count
( Theme )
  • window countrate
( Theme )
  • airborne digital data
( Theme )
  • geophysical survey
( Theme )
  • rad
( Theme )
  • K
( Theme )
  • Th
( Theme )
  • TC
( Theme )
  • U
( Theme )
  • gamma-ray
( Theme )
  • spectrometry
( Theme )
  • grid
( Theme )
  • raster
( Theme )
  • image
( Theme )
  • 4-band
( Theme )
  • four band
  • Published_External

Publication Date

2020-03-07T00:00:00

Creation Date

2020-03-07T00:00:00

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

completed

Purpose

Maintenance Information

notPlanned

Topic Category

geoscientificInformation

Series Information

Lineage

This GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic is an airborne-derived radiometric Potassium, Thorium and Uranium data over a sun shaded total countrate data for the Heathcote, Vic, 1988 (GSV0360). The survey was acquired in 1988 under the project No. 1520 for the geological survey of VIC. The data consisted of 3040 line-kilometres of data at 200m line spacing and 70m terrain clearance. The radiometric count rate is contaminated by background radiation contributions from the aircraft, cosmic rays, and the presence of Radon gas escaping from the ground. It is also affected by the ground clearance of the detector, as well as the volume of the detector. Radiometric corrections were applied to the four window (K, Th, U and TC) data from the 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. The final grid is checked for quality by GA geophysicists to ensure that the final data released are fit-for-purpose. This GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic was produced by applying the colours red to the Potassium ground concentration, green to the Thorium concentration and blue to the Uranium concentration. The colours were clipped to a 99% linear scale. These colours were transparent over a shaded Total Count. This clipping will necessarily introduce some artefacts into the ratio grids in areas of very low radioelement concentrations. The 3-band image was superposed on the sun shaded TC grid of the same survey to produce the final image. The %MV_DATASETS/ARCHIVE_FILE_DESCRIPTION%% has a cell size of 0.0005 degrees (approximately 50m) and shows the K-Th-U-TC window countrate of the Heathcote, Vic, 1988 (GSV0360). 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).

Parent Information

Geophysical Data Collection - Airborne Geophysics

UUID - ddeb0fc4-32e3-4913-80f2-f4249b17a925,

eCat ID - 111301

Extents

[-37.1233, -36.7936, 144.5338, 144.8655]

Reference System

AGD66 (EPSG:4202)

Spatial Resolution

Service Information

Associations

Association Type - operatedOnBy

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic NCSS    

Association Type - operatedOnBy

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic OPeNDAP    

Association Type - operatedOnBy

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic WMS    

Association Type - operatedOnBy

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic WCS    

Downloads and Links

File available for download in various formats from the GADDS2 portal  

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic file download  

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic NCSS  

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic OPeNDAP  

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic WMS  

GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic WCS  

Source Information

This GSV Heathcote Vic pot tho ura totg 4band radiometric grid geodetic includes airborne-derived radiometric K-Th-U-TC window countrate data for the Heathcote, Vic, 1988 (GSV0360) acquired for the geological survey of VIC