Authors / CoAuthors
Huang, Z. | Siwabessy, J.
Abstract
This dataset contains topographic position index data from seabed mapping surveys on the Van Diemen Rise in the eastern Joseph Bonaparte Gulf of the Timor Sea. The survey was conducted under a Memorandum of Understanding between Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS) in two consecutive years 2009 (GA survey number GA-0322 and AIMS survey number SOL4934) and 2010 (GA survey number GA-0325 and AIMS survey number SOL5117). The surveys obtained detailed geological (sedimentological, geochemical, geophysical) and biological data (macro-benthic and infaunal diversity, community structure) for the banks, channels and plains to investigate relationships between the physical environment and associated biota for biodiversity prediction. The surveys also provide Arafura-Timor Sea, and wider northern Australian marine region context for the benthic biodiversity of the Van Diemen Rise. Four study areas were investigated across the outer to inner shelf. Refer to the GA record 'Methodologies for seabed substrate characterisation using multibeam bathymetry, backscatter, and video data: A case study for the Eastern Joseph Bonaparte Gulf, Northern Australia' for further information on processing techniques applied (GeoCat: 74092; GA Record: 2013/11).
Product Type
dataset
eCat Id
76717
Contact for the resource
Custodian
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Digital Object Identifier
Keywords
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- Marine DataBathymetry Grid
- ( Theme )
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- bathymetry
- ( Theme )
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- geoscience
- ( Theme )
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- multibeam
- ( Theme )
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- marine
- ( Theme )
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- NERP
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- AU-NT
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Marine Geoscience
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- Published_External
Publication Date
2013-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
The equation used for the calculation of the benthic position index grid is: tpi = bathy - focalmean(bathy, rectangle, 7, 7) where bathy is the bathymety grid; focalmean() function is avaiable in ArcGIS.
Parent Information
Extents
[-12.287, -10.285, 129.451, 130.063]
Reference System
Spatial Resolution
Service Information
Associations
Source Information
Carbonate banks, intervening channels and surrounding sediment plains on the Van Diemen Rise in the astern Joseph Bonaparte Gulf of the Timor Sea 129.451 130.063 -12.287 -10.285