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Layered earth inversion and related airborne geophysical datasets derived from the Billabong Creek TEMPEST AEM Survey, southern New South Wales, 2001

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: ANZCW0703015995

Title: Layered earth inversion and related airborne geophysical datasets derived from the Billabong Creek TEMPEST AEM Survey, southern New South Wales, 2001


Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia


Description

Abstract:

This data package contains three airborne geophysical datasets processed from the Billabong Creek Geophysical survey, southern New South Wales, flown in 2001.

The datasets are: a new Geoscience Australia layered earth inversion (GA-LEI) of the Billabong Creek TEMPEST Airborne Electromagnetic (AEM) survey; an airborne magnetic, gamma-ray and elevation (MAGSPEC) survey; and an extract of the Australian National Gravity Database (GRAVITY). The additional processing and enhancement of the 2001 geophysical survey data has significantly improved previous conductivity predictions as well as enabling the extraction of geologically significant information to support salinity and natural resource management.

This metadata briefly describes the contents of the data package. The user guide included in the package contains more detailed information about the individual datasets and available technical reports.

The AEM dataset comprises the final Geoscience Australia layered earth inversion (GA-LEI) of the 2001 Billabong Creek TEMPEST AEM survey, produced in 2008. The main data products from the GA-LEI inversion are: point located inversion output data; horizontal layer conductivity grids below ground surface; horizontal conductivity-depth slice grids of various regular depth intervals below ground surface; vertical conductivity-depth sections along each flight line; horizontal conductance distribution grids; interpreted grids of the depth and elevation of the base of the conductive unit; and images of the above datasets produced using standard image enhancement techniques. The GA-LEI AEM data are derived from the 'Billabong Creek TEMPEST AEM Survey, NSW, 2001 Final Located Data (P904)', available as Geoscience Australia product number 65385 (GeoCat #65385). The GA-LEI has been demonstrated to generate more accurate conductivity predictions than other algorithms for similar TEMPEST surveys.

The MAGSPEC datasets are: airborne magnetic data comprising grids of total magnetic intensity (TMI), TMI reduced to pole (TMI-RTP), TMI-RTP first vertical derivative data and a range of enhanced magnetic images derived from the data; airborne gamma-ray data comprising grids of dose rate, concentration of potassium (K), thorium (Th) and uranium (U) and a range of enhanced gamma-ray images derived from the data; and elevation data comprising grids and images of the digital elevation model (DEM) derived from the MAGSPEC survey.

The GRAVITY dataset includes point located data, grids and enhanced images of data extracted from the Australian National Gravity Database.

The point located data are stored in ASCII files (.asc) formatted with space-delimited columns with an associated comprehensive header (.hdr) file. The gridded data are stored in ER Mapper and ESRI grid formats as binary raster grid files. The image data are stored in JPG format with associated world (.jgw) files. Technical reports describing the data processing techniques are stored in Portable Document Format (.pdf). The datasets are compressed in ZIP files.

The Billabong Creek airborne geophysics survey was commissioned by the Murray-Darling Basin Commission in 2001. Fugro Airborne Surveys Pty Ltd (Fugro) was contracted to acquire and process the AEM survey utilising the TEMPEST time domain airborne electromagnetic system. Kevron Geophysics Pty Ltd (Kevron) was contracted to acquire and process the MAGSPEC survey utilising an industry standard system. The project was administered by the Australian Government Department of Agriculture, Fisheries and Forestry through the Bureau of Rural Sciences (BRS), now known as the Australian Bureau of Agricultural and Resource Economics and Sciences (ABARES). Geoscience Australia (GA) managed and quality controlled the work of Kevron and Fugro. Additional processing and enhancements of the 2001 airborne geophysics data was undertaken by GA in 2007-08, with funding from the National Action Plan for Salinity and Water Quality.

ANZLIC search words:

  • GEOSCIENCES Geophysics Surveys

Spatial domain:

locality map

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

Geographic extent polygon: 146.61 -35.52, 147.08 -35.52, 147.08 -35.8, 146.61 -35.8, 146.61 -35.52,

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

Geographic bounding box:
North bounding latitude: -35.52 °
South bounding latitude: -35.8 °
East bounding longitude: 147.08 °
West bounding longitude: 146.61 °

Data currency

Beginning date: 2001-08-01

Ending date: 2001-09-30


Dataset status

Progress: Complete

Maintenance and update frequency: Not Known


Access

Stored data format:
DIGITAL - pdf Adobe PDF Acrobat
DIGITAL - ArcGIS-grid ArcInfo grid GDA94
DIGITAL - shp ArcView shape file ArcView GDA94
DIGITAL - jpg JPEG image GDA94
DIGITAL - ascii ASCII text GDA94
DIGITAL - ers ER Mapper raster dataset ER Mapper GDA94
Available format type:
DIGITAL - jpg JPEG image GDA94
DIGITAL - shp ArcView shape file ArcView GDA94
DIGITAL - ascii ASCII text GDA94
DIGITAL - ArcGIS-grid ArcInfo grid GDA94
DIGITAL - pdf Adobe PDF Acrobat
DIGITAL - ers ER Mapper raster dataset ER Mapper GDA94

Access constraints:

This material is released under the Creative Commons Attribution 3.0 Australia Licence.

Free Data Download

Data quality

Lineage:

The processing of the TEMPEST AEM data GA-LEI inversion, MAGSPEC, elevation and gravity data including point located data, grids and enhanced images was undertaken by Geoscience Australia. Details of the processing are available in Fisher and Brodie (2008), which is included in the dataset (Filename: BBC_survey_and_metadata_final.pdf).

The processing of the TEMPEST AEM conductivity predictions using the GA-LEI algorithm was undertaken by Geoscience Australia. Details of the processing are available in Brodie and Fisher (2008), which is included in the dataset (Filename: BBC_Inversion_Report_final.pdf).

The AEM survey data were acquired and processed by the airborne geophysical survey contractors Fugro Airborne Surveys. Details of the acquisition and processing are available in Owers, Sattel and Stenning (2001), which is included in the data package (Filename: BBC_Fugro_AEM_jobreport.pdf).

The Honeysuckle Creek and Billabong Creek Operations and Processing report was compiled by Kevron Geophysics and is included in the data package (Filename: HSK_KEVRON_Operations_Processing_Report.pdf)

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 2008. More sophisticated processing algorithms may be applied to these data should they become available.

Logical Consistency:

Not applicable.

Completeness:

The dataset includes all final data and products created by Geoscience Australia for the project.


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: sales@ga.gov.au

Metadata information

Metadata date: 2013-03-08


Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703015995.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703015995.xml

References:

Brodie, RC & Fisher, A 2008, Inversion of TEMPEST AEM survey data Billabong Creek, southern NSW. Report produced by Geoscience Australia for the Bureau of Rural Sciences, Canberra, Australia.

Fisher, A & Brodie, RC 2008, Geophysical survey data and metadata, Billabong Creek, New South Wales. Report produced by Geoscience Australia for the Bureau of Rural Sciences, Canberra, Australia.

Kevron Geophysics, 2001, Operations and processing report, Honeysuckle Creek and Billabong Creek geophysical surveys. Kevron Geophysics report to the Bureau of Rural Sciences.

Owers, M, Sattel, D and Stenning, L 2001, Billabong Creek NSW TEMPEST Geophysical Survey acquisition and processing report. Fugro Airborne Surveys report to the Bureau of Rural Sciences.

Authors:Geoscience Australia
SPATIAL INFORMATION FOR THE NATION