• 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
Role Organisation / Individual Name Details
Author

Geophysical Acquisition & Processing Section

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice
Topic category
  • Geoscientific information

Extent

N
S
E
W


Temporal extent

Time period
2019-01-01T00:00:00 2019-01-01T00:00:00
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.ANZRC Fields of Research.rdf
  • EARTH SCIENCES

Data centre
  • NCI

Discipline
  • Earth sciences

Discipline
  • geophysics

Feature type
  • image

Place
  • Australia

Place
  • SA

Project
  • survey 5000

Theme
  • GADDS2.0

Theme
  • TMI

Theme
  • magnetics

Theme
  • magnetism

Theme
  • palaeomagnetism

Theme
  • airborne digital data

Theme
  • geophysical survey

Theme
  • mag

Theme
  • total magnetic intensity

Theme
  • pseudocolour

Theme
  • image

Keywords
  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License
Other constraints

© Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Geoscience Australia

Voice
OnLine resource

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
  • WWW:LINK-1.0-http--link

Distributor contact
Role Organisation / Individual Name Details
Distributor

National Computational Infrastructure

Voice
OnLine resource

/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
  • FILE:GEO

Distributor contact
Role Organisation / Individual Name Details
Distributor

National Computational Infrastructure

Voice
OnLine resource

/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
  • WWW:LINK-1.0-http--link

Resource lineage

Statement

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

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

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/e609d3db-19d6-4f9a-8663-4196d7d7026a

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice
Point of contact

Manager Client Services

Title

Geophysical Data Collection - Airborne Geophysics

Citation identifier
ddeb0fc4-32e3-4913-80f2-f4249b17a925

Citation identifier
111301

Type of resource

Resource scope
Dataset
Name

Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS)

Alternative metadata reference

Title

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

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

 
 

Spatial extent

N
S
E
W


Keywords

Earth sciences GADDS2.0 NCI TMI airborne digital data geophysical survey geophysics image image mag magnetics magnetism palaeomagnetism pseudocolour survey 5000 total magnetic intensity
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

Provided by

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •