Authors / CoAuthors
Spinoccia, M.
Abstract
The Austrea1 bathymetry survey, GA-0222 was acquired by Geoscience Australia onboard the IFREMER N/O L'Atalante from the 17th of December 1999 to the 11th of January 2000 using a Simrad EM12 Dual sonar system. The main objectives of the shipboard program are to collect seabed and sub- bottom data in specific areas off southeast Australia for marine research (geological and biological), assessment of resource potential, regional marine zone planning and management, and to support Australia's claims under UNCLOS and to map the deep water part of a marine protected area in the Great Australian Bight (GAB). This dataset contains a 100m resolution 32-bit geotiff of the Austrea1 survey, produced from the processed EM12D bathymetry data of the survey area using the CARIS HIPS and SIPS software. This dataset is published with the permission of the CEO, Geoscience Australia. Not to be used for navigational purposes.
Product Type
dataset
eCat Id
144240
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
Resource provider
Keywords
- theme.ANZRC Fields of Research.rdf
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- EARTH SCIENCES
- ( {1} )
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- HVC_144641
- ( {1} )
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- Marine
- ( {1} )
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- Multibeam
- ( {1} )
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- AusSeabed
- ( {1} )
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- Bathymetry
- ( {1} )
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- Bathymetric grids
- ( {1} )
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- Published_External
Publication Date
2020-10-07T03:44:09
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Marine Geology
Lineage
The Austrea1 bathymetry survey, GA-0222 was acquired by Geoscience Australia onboard the N/O L'Atalante from the 17th of December 1999 to the 11th of January 2000. The Chief scientist onboard was Mr. Peter Hill. This dataset was acquired and processed onboard by the N/O L'Atalante and further processing was conducted in the office by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2. For any metadata questions, please download the Metadata.txt file with the dataset. Processing: 1. First a vessel configuration file was created where the co-ordinates of the motion sensor and DGPS antenna and patch test offsets were recorded. 2. A new project was then created and the vessel configuration file was attached to the project file. 3. The raw swath sonar data, in raw.all format, for each line was then imported into the project and the vessel information assigned to the data. 4. The motion sensor, DGPS and heading data were then cleaned using a filter that averaged adjacent data to remove artefacts. 5. Different sound velocity profiles data for each block were attached to the corresponding raw swath sonar data files to correct the depths for changes in the speed of sound through the water column. 6. Then a new blank field area was defined that specified the geographic area of study and the co-ordinate system used. The co-ordinates for the study areas were WGS84 UTM-58S to UTM52S. 7. The data was cleaned by applying several filters that removed any remaining spikes in the bathymetry data using user defined threshold values. A visual inspection of the data for each line was then undertaken where artefacts and noisy data not removed by the filtering process were removed manually using Swath and subset editors modules of the Caris HIPS/SIPS software. 8. All the data for each bathymetric, motion sensor, DGPS, heading, tide and sound velocity profile data were merged to produce the final processed data file. A weighted grid of the processed data was then created for each Block. In GA the tide was applied to the grid to correct for tidal variations and velocity corrections were performed to correct for different artefacts and mismatches. 9. The processed data was finally exported as grids soundings or false coloured images for presentation and reporting and as final processed data in 32 bit Geotiffs format at the optimum resolution the data can provide.
Parent Information
Extents
[-44.70, -22.30, 130.30, 166.40]
Reference System
Spatial Resolution
100m
Service Information
Associations
Downloads and Links
Austrea 1 UTM52 Bathymetry 1999 100m (tif) [6.65 MB]
Austrea 1 UTM53 Bathymetry 1999 100m (tif) [8.1 MB]
Austrea 1 UTM54 Bathymetry 1999 100m (tif) [5.89 MB]
Austrea 1 UTM55 Bathymetry 1999 100m (tif) [9.78 MB]
Austrea 1 UTM56 Bathymetry 1999 100m (tif) [8.31 MB]
Austrea 1 UTM57 Bathymetry 1999 100m (tif) [5.05 MB]
Austrea 1 UTM58 Bathymetry 1999 100m (tif) [4.07 MB]
Download the GeoTiffs (tiff) [47.4 MB]
Source Information