Global Change Master Directory (GCMD)

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Coastal seabed mapping survey, Vestfold Hills, Antarctica, February-March 2010

Entry ID: Davis_multibeam_grids

Summary

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 Kongsberg EM3002D 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 as the seabed was esonified from opposing angles to resolve and provide detail to the numerous features of the seafloor such as rocky reefs, iceberg scours, boulders, anchor chain drag marks and grounded icebergs. 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.

The project was a component of Australian Antarctic Science (AAS) Project 2201 - Natural Variability and Human Induced Change on Antarctic Nearshore Marine Benthic Communities.

In 2011, Dr Phil O'Brien provided to the Australian Antarctic Data Centre the following interim data:
75 cm multibeam data in CARIS format; and
a 4 metre resolution bathymetric grid and an image of the sea floor, both derived from the 75 cm multibeam data.
This data was made available for download from this metadata record.

In August 2013, Geoscience Australia released 2 metre resolution bathymetric and backscatter grids after further processing of the multibeam data. The bathymetry and backscatter data have now been fully processed checked and validated by Geoscience Australia and supersede the interim data. The interim data has been archived by the Australian Antarctic Data Centre. The 2 metre resolution grids and final report are available for download from the Geoscience Australia website.

Related URL

Link: View Related Information

Description: Download point at the Geoscience Australia website for the 2 metre resolution bathymetric grid and the report

Link: View Related Information

Description: Download point at the Geoscience Australia website for the 2 metre resolution backscatter grid and the report

Link: View Related Information

Description: Public information for ASAC project 2201

Link: View Related Information

Description: Citation reference for this metadata record and dataset

Geographic Coverage

Spatial coordinates

N: -68.2

S: -68.9

E: 78.0

W: 77.3

Data Set Citation

Dataset Originator/Creator: O'Brien, P.E.

Dataset Title: Coastal seabed mapping survey, Vestfold Hills, Antarctica, February-March 2010

Dataset Series Name: CAASM Metadata

Dataset Release Date: 2011-04-29

Dataset Publisher: Australian Antarctic Data Centre

Version: 2

Online Resource: https://data.aad.gov.au/metadata/records/Davis_multibeam_grids

Parent DIF

This description is a member of a collection. The collection is described in
ASAC_2201

Temporal Coverage

Start Date: 2010-01-25

Stop Date: 2010-03-29

Location Keywords

OCEAN > SOUTHERN OCEAN

CONTINENT > ANTARCTICA

GEOGRAPHIC REGION > POLAR

Data Resolution

Latitude Resolution: 2 Metre(s)
Longitude Resolution: 2 Metre(s)

Science Keywords

OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY

OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH

OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY

Platform

SHIPS

Instrument

SIDE-SCAN SONAR

SONAR > Sound Navigation and Ranging

MSBS > Multibeam Swath Bathymetry System

Quality See the report available for download for further information.

Access Constraints The 2 metre resolution bathymetric and backscatter grids and the report are available for download from the Geoscience Australia website (see URLs below).
The bathymetric grid is available in ascii xyz, ESRI grid and CARIS formats.
The backscatter grid is available in ESRI ascii and ESRI grid formats.

Use Constraints This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

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.

Ancillary Keywords

Seabed Mapping

Multibeam

Data Set Progress

COMPLETE

Originating Center

Australian Antarctic Division

Data Center

Australian Antarctic Data Centre, Australia

Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC Phone: +61 3 6232 3244 Fax: +61 3 6232 3351 Email: metadata at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia

Distribution

Distribution Media: HTTP

Distribution Size: 39 MB

Distribution Format: Ascii xyz

Fees: Free

Distribution Media: HTTP

Distribution Size: 41 MB

Distribution Format: ESRI grid

Fees: Free

Distribution Media: HTTP

Distribution Size: 51 MB

Distribution Format: CARIS

Fees: Free

Distribution Media: HTTP

Distribution Size: 62 MB

Distribution Format: ESRI ascii, ESRI grid

Fees: Free

Distribution Media: HTTP

Distribution Size: 5 Mb

Distribution Format: pdf

Fees: Free

Personnel

PHILIP EDWARD O'BRIEN

Role: INVESTIGATOR

Role: TECHNICAL CONTACT

Email: phil.obrien.ant at gmail.com

DAVE J. CONNELL

Role: DIF AUTHOR

Phone: +61 3 6232 3244

Fax: +61 3 6232 3351

Email: dave.connell at aad.gov.au

Contact Address:

Australian Antarctic Division

203 Channel Highway

City: Kingston

Province or State: Tasmania

Postal Code: 7050

Country: Australia

Publications/References

O'Brien, P.E., Atkinson, I., Bowden, R., Forrest, D., Paddison, J. and Swanson, S. (2011), Coastal seabed mapping survey, Vestfold Hills, Antarctica, February-March 2010 (AAS 2201) - Post Survey Report., Geoscience Australia Record, 2010/47, 34

Extended Metadata Properties

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Creation and Review Dates

DIF Creation Date: 2011-04-29

Last DIF Revision Date: 2019-04-02

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