Backscatter grid of the Lord Howe survey area

Citation Description Data currency

Dataset status Access Data quality

Contact information Metadata information Additional metadata

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

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Dataset citation

ANZLIC unique identifier: ANZCW0703015333

Title: Backscatter grid of the Lord Howe survey area

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Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia

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Description

Abstract:

Geoscience Australia carried out a marine survey on Lord Howe Island shelf (NSW) in 2008 (SS062008) to map seabed bathymetry and characterise benthic environments through colocated sampling of surface sediments and infauna, rock coring, observation of benthic habitats using underwater towed video, and measurement of ocean tides and wavegenerated currents. Subbottom profile data was also collected to map sediment thickness and shelf stratigraphy. Data and samples were acquired using the National Facility Research Vessel Southern Surveyor. Bathymetric data from this survey was merged with other preexisting bathymetric data (including LADS) to generate a grid covering 1034 sq km. As part of a separate Geoscience Australia survey in 2007 (TAN0713), an oceanographic mooring was deployed on the northern edge of Lord Howe Island shelf. The mooring was recovered during the 2008 survey following a 6 month deployment. lh_back_8m is an ArcGIS layer of the backscatter grid of the Lord Howe survey area produced from the processed EM300 backscatter data of the survey area using the CMST-GA MB Process

ANZLIC search words:

• GEOSCIENCES Mapping

Spatial domain:

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

Geographic extent polygon: 158.8 -31.3, 159.4 -31.3, 159.4 -31.9, 158.8 -31.9, 158.8 -31.3,

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

Geographic bounding box:

North bounding latitude: -31.3 °

South bounding latitude: -31.9 °

East bounding longitude: 159.4 °

West bounding longitude: 158.8 °

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Data currency

Beginning date: 2010-10-20

Ending date: 2010-10-20

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Dataset status

Progress: Complete

Maintenance and update frequency: Not Known

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Access

Stored data format:

DIGITAL - ArcGIS-grid ArcInfo grid

Available format type:

DIGITAL - ArcGIS-grid ArcInfo grid

Access constraints:

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

Order Product

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Data quality

Lineage:

The grid values are basically the average values of the processed backscatter point data within each grid cell of predefined size

Positional accuracy:

The positional accuracy is high as required by the multibeam sonar system to properly function

Attribute accuracy:

The accuracy is medium high. It is cell size dependent. Note that the water depth dictates the cell size

Logical Consistency:

All procedures, steps and software involved in producing a backscatter grid are similar

Completeness:

Completed

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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

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Metadata information

Metadata date: 2013-03-08

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Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703015333.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703015333.xml

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Authors:Geoscience Australia