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Raw multibeam backscatter data of the South East Tasmania Shelf

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: ANZCW0703016226

Title: Raw multibeam backscatter data of the South East Tasmania Shelf


Custodian: Geoscience Australia

Jurisdiction: Australia



Geoscience Australia carried out marine surveys in southeast Tasmania in 2008 and 2009 (GA0315) to map seabed bathymetry and characterise benthic environments through observation of habitats using underwater towed video. Data was acquired using the Tasmania Aquaculture and Fisheries Institute (TAFI) Research Vessel Challenger. Bathymetric mapping was undertaken in seven survey areas, including: Freycinet Pensinula (83 sq km, east coast and shelf); Tasman Peninsula (117 sq km, east coast and shelf); Port Arthur and adjacent open coast (17 sq km); The Friars (41 sq km, south of Bruny Island); lower Huon River estuary (39 sq km); D Entrecastreaux Channel (7 sq km, at Tinderbox north of Bruny Island), and; Maria Island (3 sq km, western side). Video characterisations of the seabed concentrated on areas of bedrock reef and adjacent seabed in all mapped areas, except for D Entrecastreaux Channel and Maria Island. The "challenger" folder contains raw multibeam backscatter data from two surveys archived seperately in 0306_tasman1 and 0315_se_tasmania. The raw multibeam backscatter data were collected along survey lines using GAs Kongsberg SIMRAD EM3002 in single head configuration from aboard MV Challenger.

ANZLIC search words:

  • MARINE Mapping
  • MARINE Surveys
  • MARINE Geology and Geophysics

Spatial domain:

locality map

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

Geographic extent polygon: 147.05 -42, 148.55 -42, 148.55 -43.62, 147.05 -43.62, 147.05 -42,

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

Geographic bounding box:
North bounding latitude: -42 °
South bounding latitude: -43.62 °
East bounding longitude: 148.55 °
West bounding longitude: 147.05 °

Data currency

Beginning date: 2008-06-15

Ending date: 2009-03-12

Dataset status

Progress: Complete

Maintenance and update frequency: Not Known


Stored data format:
DIGITAL - xls Microsoft Excel spreadsheet Excel GDA94
Available format type:
DIGITAL - xls Microsoft Excel spreadsheet Excel GDA94

Access constraints:

The raw data is not to be released. Contact custodian for more information.

Order Product

Data quality


Kongsberg SIMRAD EM3002 multibeam sonar operating at 300kHz with 1.5x1.5 deg beamwidth was used to acquire the backscatter and bathymetry data

Positional accuracy:

C_NAV system was used to provide geographical postion with a manufacturer accuracy of 10 cm RMS. Applanix system was used to provide roll and pitch, and heave with manufacturer accuracies for roll and pitch are 0.05 deg. RMS, and manufacturer accuracy for heave is 5 cm.

Attribute accuracy:

The accuracy is quite high because of the narrow beam that the sonar system uses and the high positional accuracy that the auxiliary sensors provide. The patch test conducted at the beginning of the survey and routine SVP casts during the survey contribute to high accuracy that the system used can provide.

Logical Consistency:

The same setting, data acqusition procedure, and patch test and calibration procedure and methodology were consistanly applied to whole survey.



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:Siwabessy, J.