Product catalogue
Elizabeth and Middleton Reef multibeam sonar backscatter survey (GA4848)
This resource includes multibeam sonar backscatter data for Middleton Reef and Elizabeth Reef within Lord Howe Marine Park collected by Geoscience Australia during the period 31 January to 6 February 2020 on the Australian Maritime College vessel, TV Bluefin. The survey was undertaken as a collaborative project funded through the National Environmental Science Program Marine Biodiversity Hub, with the Institute for Marine & Antarctic Studies (University of Tasmania), NSW Department of Primary Industries, University of Sydney (Australian Centre for Field Robotics) and Parks Australia (Marine Park managers, Commonwealth Government). The purpose of the survey was to collect baseline information for benthic habitats within the National Park Zone (Middleton Reef) and Recreational Use Zone (Elizabeth Reef) of the marine park. These data will support ongoing environmental monitoring within the Temperate East Marine Park Network as part of its 10-year management plan (2018-2028). Data acquisition for the project included seabed mapping using multibeam sonar (Kongsberg EM 2040C HD, 300 kHz), seabed imagery acquisition by Autonomous Underwater Vehicles (AUV Sirius and AUV Nimbus), sediment samples (grab) and imagery of demersal fish communities by baited remote underwater videos (BRUVs). This dataset comprises two bathymetry grids derived from multibeam sonar data gridded at 4 mspatial resolution. A detailed report on the survey is available on the Marine Biodiversity Hub’s website ( https://www.nespmarine.edu.au/reports; Carroll, A et al., 2020,. Australian Marine Park Baseline and Monitoring Survey: Post Survey Report, Middleton and Elizabeth Reefs, Lord Howe Marine Park.
This dataset is not to be used for navigational purposes.
This dataset is published with the permission of the CEO, Geoscience Australia
Simple
Identification info
- Date (Creation)
- 2020-12-02
- Date (Publication)
- 2020-12-09T22:44:49
- Date (Revision)
- 2020-12-04T00:35:17
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/144416
Identifier
- Codespace
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Digital Obejct Identifier
- Name
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Geosciences
- Purpose
-
backscatter survey
- Status
- Completed
- Point of contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Spinoccia, M.
Resource provider Place, Space and Communities Division
- Spatial representation type
Spatial resolution
- Level of detail
-
4m
- Topic category
-
- Geoscientific information
Extent
))
Temporal extent
- Time period
- 2020-01-31 2020-02-06
- Maintenance and update frequency
- As needed
Resource format
- Title
-
Product data repository: Various Formats
- Website
-
Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
-
-
EARTH SCIENCES
-
- Theme
-
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Marine
-
- Keywords
-
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Backscatter
-
- Instrument
-
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Multibeam
-
- Product
-
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Bathymetric grids
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- Project
-
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AusSeabed
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- Keywords
-
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Marine Biodiversity Hub
-
- Keywords
-
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Published_External
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Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Download the geotifs [13.7 MB]
Download the geotifs [13.7 MB]
- Distribution format
-
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tif
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- OnLine resource
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Download the metadata [950 KB]
Download the metadata [950 KB]
- Distribution format
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txt, pdf
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Resource lineage
- Statement
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While AusSeabed aims to publish data to the level of adherence based on the requirements stated in the AusSeabed multibeam guidelines (version 1), we will also publish interim products (version 0) that are currently available, but have not yet been standardised (version 1). Users should be aware that V1 products will always supersede V0 products. This is a V1 product for GA4848
Processing:
1. Multibeam data were collected using a Kongsberg EM2040C multibeam echosounder system, mounted in the moon pool of the MV Bluefin. Motion referencing and navigation data were collected with an Applanix Position and Orientation system and a C-Nav GPS system, respectively. Multibeam data were acquired using Kongsberg’s Seabed Information System (SIS) software.
2. These data were processed using the multibeam backscatter CMST-GA MB Process v15.04.04.0 (x64) toolbox software co-developed by the Centre for Marine Science and Technology (CMST) at Curtin University of Technology and GA (described in Gavrilov et al., 2005; Parnum and Gavrilov 2011).
3. The process involved removal of the system transmission loss, removal of the system model, calculation of the incidence angle, correction of the beam pattern, calculation of the angular backscatter response within a sliding window of 100 pings with a 50% overlap in a 1° bin, removal of the angular dependence, and restoration to the backscatter strength at an angle of 40°. The final processed backscatter data were then gridded to 1 m horizontal resolution and exported for display and analysis.
In GA, further process was conducted by Justy Siwabessy to fine tune beam pattern correction.
4. The processed data was finally exported as grids in the optimum resolution the data can provide.
Metadata:
The multibeam bathymetry was acquired by the following survey:
- Survey Name: Elizabeth and Middleton Reef Backscatter survey (GA4848)
- Vessel Name: TV Bluefin
- Institution: Geoscience Australia,Institute for Marine & Antarctic Studies (University of Tasmania), NSW Department of Primary Industries, University of Sydney (Australian Centre for Field Robotics) and Parks Australia (Marine Park managers, Commonwealth Government).
- Country: Australia
- Operator: Australian Maritime College
- Multibeam system: Kongsberg EM 2040C HD
- Year of installation: 2020
- Nominal sonar frequency: 300 kHz
- Number of heads: 1
- Number of beams/soundings: 400 soundings
- Beamwidth along track: 1.3 degree
- Beamwidth across track:1.3 degree
- Pulse length: variable
- Selectable depth range: variable
- Vessel speed: 5 - 7 knots
- Start Date: 31/01/2020
- End Date: 06/02/2020
- Start Port: Launceston
- End Port: Launceston
- Processing software: CMST-GA MB Process v15.04.04.0
- Grid resolution:4 m
- Number of grids: 2
- Use Limitation: This dataset is not to be used for navigational purposes.
- This dataset is published with the permission of the CEO, Geoscience Australia
For V1
- Vertical Datum: MSL and Ellipsoid
- Horizontal Datum: WGS 84 / UTM zone 57S (EPSG:32757)
Reference System Information
- Reference system identifier
- EPSG/WGS 84 / UTM zone 57S (EPSG:32757)
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/8d951802-8eeb-4628-972d-cace60ae15ee
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Spinoccia, M.
Type of resource
- Resource scope
- Dataset
- Name
-
Elizabeth and Middleton Reef multibeam sonar backscatter survey (GA4848)
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/144416
- Date info (Creation)
- 2020-09-02T06:12:14
- Date info (Revision)
- 2020-09-02T06:12:14
Metadata standard
- Title
-
AU/NZS ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-3
- Title
-
Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
-
Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/144285