Product catalogue
Radiometric Grid of Australia (Radmap) v4 2019 ratio thorium over potassium
The thorium over potassium grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia. 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 potassium (K), uranium (U) and thorium (Th). The data are collected on airborne geophysical surveys conducted by Commonwealth, State and Northern Territory Governments and the private sector.
The 2019 thorium over potassium was derived by seamlessly merging over 600 airborne gamma-ray spectrometric surveys. The final grid has a cell size of about 100m (0.001 degrees) and is derived from the filtered thorium and potassium grids.
Simple
Identification info
- Date (Publication)
- 2019-11-04T00:00:00
- Date (Revision)
- 2019-11-20T00:57:36
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/131976
- Citation identifier
- Digital Object Identifier/http://dx.doi.org/10.26186/5dd48f8e542f2
- Cited responsible party
-
Role Organisation / Individual Name Details Publisher Geoscience Australia
Canberra Author Poudjom Djomani, Y.
Author Minty, B.R.S.
- Point of contact
-
Role Organisation / Individual Name Details Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
Voice Author Poudjom Djomani, Y.
Resource provider Resources Division
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- Not planned
Resource format
- Title
-
Product data repository: Various Formats
- Website
-
Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Theme
-
-
airborne digital data
-
- Theme
-
-
radiometrics
-
- Theme
-
-
national geophysical compilation
-
- Discipline
-
-
Earth sciences
-
- Discipline
-
-
geophysics
-
- Data centre
-
-
NCI
-
- Place
-
-
Australia
-
- Feature type
-
-
grid
-
- Keywords
-
-
Published_External
-
- Feature type
-
-
raster
-
- Theme
-
-
thorium
-
- Theme
-
-
potassium
-
- Temporal
-
-
2019
-
- Service
-
-
GADDS2.0
-
- Product
-
-
radmap
-
Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Associated resource
- Association Type
- Operated on by
- Title
-
National Magnetic And Radiometric Grids WMS
- Citation identifier
- 140126
- Citation identifier
- 9bac39d0-827c-4ca8-9f15-f99c1c201b64
Associated resource
- Association Type
- Operated on by
- Title
-
National Magnetic And Radiometric Grids WCS
- Citation identifier
- 146015
- Citation identifier
- e49f3b62-01c3-474c-b731-ad35c69fe72d
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
-
Download the data (ers) [2.2 GB]
Download the data (ers) [2.2 GB]
- Distribution format
-
-
ers
-
- OnLine resource
-
National Magnetic And Radiometric Grids WMS
National Magnetic And Radiometric Grids WMS
- Distribution format
-
-
OGC:WMS
-
- OnLine resource
-
National Magnetic And Radiometric Grids WCS
National Magnetic And Radiometric Grids WCS
- Distribution format
-
-
OGC:WCS
-
Resource lineage
- Statement
-
The thorium over potassium ratio grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia. The radiometric grid of Australia is derived by merging over 600 airborne gamma-ray spectrometric surveys by the Commonwealth, State and Territory Governments and held in the national radioelement database of Australia. The cell sizes of the original survey grids range from 50 m through 800 m, but most have a cell size of about 100 m. The original survey grids were re-levelled and then re-sampled to generate the Radiometric Map of Australia grids with a cell size of about 100m (0.001 degrees).
The data quality varies depending on the survey. The data were 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.
Thorium over potassium ratio grid was calculated after first applying a low value 'clip' to the thorium and potassium grid values - i.e. any values less than 0.1 are set to 0.1 prior to ratioing. This clipping will necessarily introduce some artefacts into the ratio grids in areas of very low radioelement concentrations.The final grid is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
- Hierarchy level
- Dataset
- Description
-
The radiometric grid of Australia is derived by merging over 550 airborne gamma-ray spectrometric surveys by the Commonwealth, State and Territory Governments and held in the national radioelement database of Australia.
Reference System Information
- Reference system identifier
- EPSG/GDA94 (EPSG:4283)
Metadata constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/cd5b97af-63e4-4239-ae19-09f050257052
- Title
-
GeoNetwork UUID
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Author Poudjom Djomani, Y.
- Title
-
Geophysical Data Collection - radiometrics
- Date (Creation)
- 1951-01-01T00:00:00
- Edition date
- 1951-01-01T00:00:00
Identifier
- Description
-
UUID
Identifier
- Description
-
eCat ID
Type of resource
- Resource scope
- Dataset
- Name
-
dataset
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/131976
- Date info (Revision)
- 2018-04-20T05:51:54
- Date info (Creation)
- 2015-10-15T00:00:00
Metadata standard
- Title
-
AU/NZS ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-3
- Title
-
Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
-
Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551