Coastal seabed mapping survey, Vestfold Hills, Antarctica, February-March 2010Entry ID: Davis_multibeam_grids
Abstract: From February to March 2010, Geoscience Australia (GA) conducted a multibeam sonar survey of the coastal waters of the Vestfold Hills in the Australian Antarctic Territory. The survey was conducted jointly with Australian Antarctic Division (AAD) and the Deployable Geospatial Survey Team (DGST) of the Royal Australian Navy. The survey was aimed primarily at understanding the character of the sea ... floor around Davis Station to better inform studies of the benthic biota and the possible impacts of the Davis sewage outfall. DGST were involved to ensure that the bathymetric data could be used to update and extend the nautical charts of the Davis area.
The survey was conducted using GA's Simrad EM 3002 multibeam echo sounder and C-Nav Differential GPS system mounted on the AAD work boat Howard Burton. Sixteen under water videos were also collected using the GA Raytech camera system and 3 grabs were also collected to compliment an intensive sampling program by AAD divers and a sampling program conducted in the 1990's by University of Tasmania (Franklin, 1996).
An area of 42 km2 was surveyed intensively immediately off Davis and additional survey lines were run to Long Fjord in the north and to Crooked Fjord and the Sorsdal Glacier in the south. The main survey area had between 150% and 200% coverage and a minimum sounding density of 1 sounding per 40 cm2. The new high resolution data provided detailed maps of sea bed morphology and texture classification to complement sample data. Sixteen video transects were collected and 3 grab samples collected in water too deep for the Australian Antarctic Division Diving program.
New high resolution bathymetric grids have been prepared for scientific use and further processing for hydrographic charting is ongoing. A new sea floor geomorphic map has been prepared using the multibeam data, preliminary video and sampling data.
This work was also completed as part of ASAC (AAS) project 2201.
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Data Set Citation
Dataset Release Date: 2011-04-29
This data set description is a member of a collection. The collection is described in
Start Date: 2010-01-25Stop Date: 2010-03-29
Latitude Resolution: 75 cm
Longitude Resolution: 75 cm
Quality See the report included with the download for further information.
Access Constraints These data (75 cm multibeam data) are available for download from the provided URL.
The data can be viewed on a free viewer provided by CARIS at the provided URL.
Also available for download are a 4 metre resolution bathymetric grid and an image of the sea floor, both derived from the 75 cm multibeam data.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=Davis_mu... when using these data.
Data Set Progress
Role: TECHNICAL CONTACT
Email: phil.obrien.ant at gmail.com
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2011-04-29
Last DIF Revision Date: 2012-12-21