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Kombolgie VTEM AEM Survey: Inversion Report and Data Package

Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.

Dataset citation

ANZLIC unique identifier: ANZCW0703014875

Title: Kombolgie VTEM AEM Survey: Inversion Report and Data Package


Custodian: Geoscience Australia

Jurisdiction: Australia



Data acquired as part of the Kombolgie VTEMTM Airborne Electromagnetic Survey have been inverted using a layered earth inversion algorithm. Interpretation products have been derived from the inversion results. The inversion results and derived products have been released by Geoscience Australia as a digital data package.

The survey was funded under the Australian Government's Onshore Energy Security Program, and was managed and interpreted by Geoscience Australia's Airborne Electromagnetic Acquisition and Interpretation Project. The Kombolgie survey area, in the Pine Creek Orogen of the Northern Territory, covered sections of the Cobourg Peninsula, Junction Bay, Alligator River, Milingimbi, Mount Evelyn, Katherine, and Urapunga 1:250 000 map sheets. It covered a total of 8 800 line km and an area of 32 000 km2. The data were acquired under contract by Geotech Airborne Pty. Ltd. using its VTEMTM helicopter-borne electromagnetic system.

The inversions were carried out using the GA-LEI layered-earth inversion software developed at Geoscience Australia. Products include the layer conductivities, depth and elevation slices, and sections. The products are in digital form in both point-located and gridded formats. They are available for download from the Geoscience Australia website.

ANZLIC search words:

  • GEOSCIENCES Geophysics Surveys

Spatial domain:

locality map

Geographic extent name: AUSTRALIA EXCLUDING EXTERNAL TERRITORIES - AUS - Australia - Australia

Geographic extent polygon: 132.5 -11.5, 134.3 -11.5, 134.3 -14.6, 132.5 -14.6, 132.5 -11.5,

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:
North bounding latitude: -11.5 °
South bounding latitude: -14.6 °
East bounding longitude: 134.3 °
West bounding longitude: 132.5 °

Data currency

Beginning date: 2008-08-21

Ending date: 2011-06-21

Dataset status

Progress: Complete

Maintenance and update frequency: Not Known


Stored data format:
DIGITAL - asc ASCII text GDA94
Available format type:
DIGITAL - asc ASCII text GDA94

Access constraints:

For DVD, licence and fee required. Contact the GA Sales Centre (email: or phone: +61 2 6249 9966, web:

Via Free download - licence required

Free Data Download

Data quality


The AEM survey data were acquired and processed by the airborne geophysical survey contractors Geotech Airborne Pty Ltd. Details on the acquisition and processing are available in Carter et al. (2009), which is included in the dataset. The data was then inverted using the GA-LEI.


Carter, S., Baron-Hay, S., Combrinck, M., and Moreton, M., 2009. Survey and Logistics Report on a helicopter borne Versatile Time Domain Electromagnetic (VTEM) Survey on the Pine Creek (Kombolgie) project area, Northern Territory, for Geoscience Australia.

Positional accuracy:

Positioning was via post-processed differential GPS methods. Horizontal positional accuracy of the data is approximately 1 metre (standard deviation)

Attribute accuracy:

The data have been acquired and processed to a standard of best practice as of the year 2009. More sophisticated processing algorithms may be applied to these data should they become available.

Logical Consistency:

Not applicable.


The dataset includes all final data and products created by Geoscience Australia using survey contractor Geotech data.

Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia) (GA)
Contact position: Manager Client Services
Mail address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Mail address: GPO Box 378
Locality: Canberra
State: ACT
Country: Australia
Postcode: 2601
Telephone: 02 6249 9966
Facsimile: 02 6249 9960
Electronic mail address:

Metadata information

Metadata date: 2013-03-08

Additional metadata

Metadata reference XHTML:

Metadata reference XML:


Authors:Brodie, R.C. Costelloe, M.T.