Product catalogue
Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS)
Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock.
The data 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 Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS) is a pseudocolour image of the TMI grid of the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 survey. The grid used to produce this image has a cell size of 0.0004 degrees (approximately 41m). The data used to produce the TMI grid was acquired in 2017-2019 by the SA Government, and consisted of 1660000 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid. This survey grid is essentially levelled to AWAGS. This pseudocolour image shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The image can also be used to locate structural features such as dykes.
Simple
Identification info
- Date (Creation)
- 2020-11-09T00:00:00
- Date (Publication)
- 2020-11-09T00:00:00
- Date (Revision)
- 2021-01-21T22:31:34
- Cited responsible party
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Role Organisation / Individual Name Details Author Geophysical Acquisition & Processing Section
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice
- Topic category
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- Geoscientific information
Extent
))
Temporal extent
- Time period
- 2019-01-01T00:00:00 2019-01-01T00:00:00
- Maintenance and update frequency
- Not planned
Resource format
- Title
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Product data repository: Various Formats
- Website
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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.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Data centre
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NCI
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- Discipline
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Earth sciences
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- Discipline
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geophysics
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- Feature type
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image
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- Place
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Australia
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- Place
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SA
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- Project
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survey 5000
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- Theme
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GADDS2.0
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- Theme
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TMI
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- Theme
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magnetics
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- Theme
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magnetism
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- Theme
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palaeomagnetism
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- Theme
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airborne digital data
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- Theme
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geophysical survey
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- Theme
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mag
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- Theme
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total magnetic intensity
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- Theme
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pseudocolour
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- Theme
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image
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
- Other constraints
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© Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Geoscience Australia
Voice
- OnLine resource
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File available for download in various formats from the GADDS2 portal
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.
- Distribution format
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WWW:LINK-1.0-http--link
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- Distributor contact
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Role Organisation / Individual Name Details Distributor National Computational Infrastructure
Voice
- OnLine resource
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/g/data/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/image/P5000/P5000-image-magnetic-tmi-AWAGS_MAG_2019.nc file at NCI
Fully qualified pathname of NetCDF file on NCI filesystem for Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS). Users must be logged onto the NCI network to access this file system.
- Distribution format
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FILE:GEO
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- Distributor contact
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Role Organisation / Individual Name Details Distributor National Computational Infrastructure
Voice
- OnLine resource
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/g/data/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/image/P5000/P5000-image-magnetic-tmi-AWAGS_MAG_2019.nc file download
File download for Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS)
- Distribution format
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WWW:LINK-1.0-http--link
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Resource lineage
- Statement
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This Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS) is a pseudocolour image of the TMI data for the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 produced by Geoscience Australia. The Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 was produced with a grid cell size of 0.00042 degrees (approximately 40m). The data are in nanoTesla (or nT). The data used to produce this grid was acquired in 2017-2019 by the SA Government, and consisted of 1660000 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid. This survey grid is essentially levelled to AWAGS (Milligan et al., 2009). The levelling and grid-merging procedure is described in detail in Minty et al. (2003). The image shows the magnetic response of subsurface features with contrasting magnetic susceptibilities and can also be used to locate structural features such as dykes. 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. References: Milligan, P.R., Minty, B.R.S., Richardson, M. and Franklin, R., 2009. The Australia-wide Airborne Geophysical Survey accurate continental magnetic coverage. Preview, No. 138, p. 1-128. Minty, B.R.S., Milligan, P.R., Luyendyk, A.P.J. and Mackey, T., 2003. Merging airborne magnetic surveys into continental-scale compilations. Geophysics, 68 (3), 988-995.
Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition);
- Hierarchy level
- Dataset
- Description
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This Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS) is a pseudocolour image of the TMI data for the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 produced by Geoscience Australia.
Reference System Information
- Reference system identifier
- EPSG/GDA94 (EPSG:4283)
Metadata constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/e609d3db-19d6-4f9a-8663-4196d7d7026a
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Manager Client Services
- Title
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Geophysical Data Collection - Airborne Geophysics
- Citation identifier
- ddeb0fc4-32e3-4913-80f2-f4249b17a925
- Citation identifier
- 111301
Type of resource
- Resource scope
- Dataset
- Name
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Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS)
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/144815
- Date info (Creation)
- 2020-12-23T00:00:00
- Date info (Revision)
- 2020-12-23T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551