Authors / CoAuthors
Sexton, M.J.
Abstract
The definition of Australia?s marine jurisdiction, under the 1982 United Nations Convention on the Law of the Sea (LOS), may need to take into account the location of the 2500m seafloor contour. A large amount of water depth data from a variety of sources have been used to produce bathymetric grids and contours around the Australian region by the LOS Study Group at Geoscience Australia. It is well known that the data are far from perfect, containing problems in depth soundings as well as navigation. The LOS Group wished to determine a quantitative measure for the accuracy of the data they have used. This study took the data used in the Naturaliste Plateau area and determined the intersection points of all the survey tracks. From this it computed interpolated water depths at the intersections and calculated mistie values between the intersecting surveys. In all 12411 intersections were found. Not all were useable, mainly due to the long intervals between soundings. Some surveys contained numerous intersections in very shallow water (~ 40 m) with excellent mistie statistics (+/- 1 m), but it was felt that these could unfairly bias the derived statistics. Taking these considerations into account reduced the number of intersecting points and mistie values that went into the statistical analysis to 5606. The procedures and programs employed in this report can easily be extended to all the other areas investigated by the LOS Group. This will be done in due course, with a future report summarising the statistics for each of the LOS study areas and making recommendations for the improvement of the bathymetric data held by Geoscience Australia.
Product Type
nonGeographicDataset
eCat Id
47276
Contact for the resource
Custodian
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GA PublicationRecord
- ( Theme )
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- bathymetry
- ( Theme )
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- marine
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- AU-WA
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2003-01-01T00:00:00
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unknown
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geoscientificInformation
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Record
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Unknown
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[-42.0, -29.0, 104.0, 116.0]
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