Product catalogue
WA Margins Reconnaissance Survey (GA-2476) (ESP) - Multibeam Acoustic Backscatter Grid
This resource contains backscatter data acquired during the WA Margins Reconnaissance survey, GA-2476 from October 2008 to January 2009 onboard the RV Sonne as part of the Energy Security Program. Almost 230,000 km² of multibeam bathymetry was acquired over the duration of the survey including all transits. Seafloor features revealed by the backscatter and swath bathymetry have shown that geomorphology of the study areas is diverse. The continental slope of the west Australian margin study areas is characterised by large areas with numerous deeply incised canyons and areas with low-angle slumps and scarps mostly on the upper part of the slope. Other geomorphic features on the continental slope include short escarpments of local extent and small volcanic peaks over the Houtman Sub-basin part of the Perth margin. New bathymetry from the Cuvier Plateau has mapped large volcanic domes, some of them with terraces, ridges, a large previously unmapped valley and two large seamounts (newly named the Cuvier Seamount and the Wallaby seamount). See GA Record 2009/38 (Geocat# 69606) for further details on processing methods.
Simple
Identification info
- Date (Publication)
- 2014-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/79138
- Cited responsible party
-
Role Organisation / Individual Name Details Author Siwabessy, J.
1
- Point of contact
-
Role Organisation / Individual Name Details Custodian EGD
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
Voice
- Topic category
-
- Geoscientific information
Extent
))
- 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
- Keywords
-
-
Marine Data
-
Backscatter Grid
-
- Theme
-
-
marine environmental baselines
-
- Theme
-
-
multibeam
-
- Theme
-
-
backscatter
-
- Theme
-
-
marine
-
- Keywords
-
-
WA
-
- Australian and New Zealand Standard Research Classification (ANZSRC)
-
-
Earth Sciences
-
- Keywords
-
-
Published_External
-
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
-
File download
Download the data (ESRI ascii)
- OnLine resource
-
File download
Download the data (tif)
- OnLine resource
-
File download
Download the data (ArcGIS-grid)
- OnLine resource
-
File download
Download the metadata (pdf)
- OnLine resource
-
File download
Download the data (KML)
- OnLine resource
-
File download
Download the data (XYZ ascii)
Resource lineage
- Statement
-
The backscatter data were processed using CMST-GA MB Process toolbox software. The fully processed backscatter strengths were corrected for transmission loss and insonification area. The process within the toolbox also involved removal of the system transmission loss, removal of the system model, calculation of the incidence angle and removal of the angular dependence. The grid values are basically the average values of the processed backscatter point data within each grid cell of predefined size, normalised to the backscatter strength at an angle of 25 degrees
- Hierarchy level
- Dataset
- Description
-
Processing software: CMST-GA MB Process
Survey Name: WA Margins Reconnaissance Survey GA-2476
Vessel: RV Sonne
Country: Germany
Operator: RF Forschungsschiffahrt GmbH
Bathymetric system used: Kongsberg EM120
Year of installation: 2008
Nominal sonar frequency: 12 kHz
Number of beams: 191 beams
Beamwidth across track: 2 degrees
Beamwidth along track : 2 degrees
Pulse length: Variable, operator selectable
Depth range: up to 6500 m
Vessel speed: 8 - 10 knots
Start date of survey: 25 October 2008
End date of survey: 19 January 2009
Institution: Geoscience Australia
Start port: Singapore
End port: Port Hedland
Survey leaders: Kriton Glenn (Leg 1), Andrew Heap (Leg 2), Michael Hughes (Leg 3)
Data acquired and processed by: Cameron Buchanan, Justy Siwabessy, Michele Spinoccia, James Daniell
Grids resolution: 200m
Number of grids: 1
This dataset consists of the following files:
- Georeferenced colour tif images in 200m resolution, shaded with sun azimuth 45 degrees
- ASCII xyz (*.txt) grids in 200m resolution in UTM49S WGS84
- ESRI ascii (*.asc) grids in 200m resolution in UTM49S WGS84
- ESRI Rasters in 200m resolution
- KMZ files
Extent
Metadata constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/f3c0935b-a1e8-3c07-e044-00144fdd4fa6
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice
Type of resource
- Resource scope
- Dataset
- Name
-
dataset
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/79138
- Date info (Revision)
- 2018-04-20T06:10:34
- Date info (Creation)
- 2014-03-04T00:00:00
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/122551