Product catalogue
Southeast Margins (Otway, Gippsland Basins and Bass Strait) 3D seismic derived bathymetry compilation (20220007C)
<div>The Otway, Gippsland Basins and Bass Strait 3D seismic derived bathymetry compilation (20220007C) was produced by the University of Western Australia, Norwegian Geotechnical Institute and UniLasalle in collaboration with Geoscience Australia through the AusSeabed initiative. The compilation integrates 87 bathymetry grids derived from available and workable 3D seismic datasets into a 30 m resolution 32-bit GeoTIFF, including both reflection and navigation derived data. A detailed workflow is described in: Lebrec, U., Paumard, V., O'Leary, M. J., and Lang, S. C., 2021, Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets: Earth System Science Data, v. 13, no. 11, p. 5191-5212 https://doi.org/10.5194/essd-13-5191-2021, 2021.</div><div><br></div><div>This dataset is not to be used for navigational purposes.</div><div><br></div>
Simple
Identification info
- Date (Creation)
- 2023-06-07T14:00:00
- Date (Publication)
- 2023-09-04T07:26:31
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/148609
- Citation identifier
- Digital Object Identifier/https://dx.doi.org/10.26186/148609
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Lebrec, U.
External Contact Author Paumard, V.
External Contact Author De Reau, C.
External Contact Author O'Leary, M.
External Contact Author Lang, S.
External Contact
- Purpose
-
Bathymetry Compilation
- Status
- Completed
- Point of contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Owner Lennard, N.
Place and Communities Internal Contact Point of contact Spinoccia, M.
Place and Communities Internal Contact Resource provider Place and Communities Division
External Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
Vertical element
- Minimum value
- 12.2
- Maximum value
- 60.9
- Reference system identifier
- EPSG/EGM2008 height / vertical (EPSG: 3855)
Temporal extent
- Time period
- 1984-12-30 2018-02-24
- Maintenance and update frequency
- Not planned
Resource format
- Title
-
Product data repository: Various Formats
- Protocol
-
FILE:DATA-DIRECTORY
- Name of the resource
-
Data Store directory containing the digital product files
- Description
-
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Keywords
-
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Marine
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- Keywords
-
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Bathymetry
-
- Keywords
-
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Seismic
-
- Keywords
-
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Bathymetric Grids
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- Keywords
-
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Bathymetric Compilations
-
- Keywords
-
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AusSeabed
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- Keywords
-
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HVC_146413
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- Instrument
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Compilation
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- Instrument
-
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SeisDB
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- Instrument
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Satellite-Derived Bathymetry
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- theme.ANZRC Fields of Research.rdf
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Marine geoscience
-
- Keywords
-
-
Published_External
-
Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Addressee
-
Role Organisation / Individual Name Details User Any
- Use constraints
- License
- Use constraints
- Other restrictions
- Other constraints
-
© Commonwealth of Australia (Geoscience Australia) 2023
Resource constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Classification system
-
Australian Government Security Classification System
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
-
Southeast Margins (Otway, Gippsland Basins and Bass Strait) Seismic-Derived Bathymetry 2022 30m (zip) [112 MB]
Southeast Margins (Otway, Gippsland Basins and Bass Strait) Seismic-Derived Bathymetry 2022 30m (zip) [112 MB]
- Distribution format
-
-
zip
- File decompression technique
-
unzip
-
Resource lineage
- Statement
-
<div>AusSeabed follows the recommended processing methodology as prescribed by the AusSeabed Multibeam Guidelines. Please note that certain products are subject to routine update (e.g. resolution, coverage, temporal variation, guidelines/best practice). The client is advised to refer to the latest version of all documents and products for the mostup-to-date material. For eCat records the version is expressed in the record title whilst products incorporate date of production as per AusSeabed’s file naming convention.</div><div> </div><div>The detailed workflow is presented in Lebrec, 2023 (Lebrec, U., Paumard, V., De Reau, C., O’Leary, M.J., and Lang S.C., 2023, Seismic-derived bathymetry data asset, Australia. and the Individual processing steps performed on each survey are reported in the supplementary spreadsheet (see attached zip file). It can be summarized as follow:</div><div> </div><div>1. Data Collection. All publicly available 3D seismic surveys within the area of interest, including PSTM SGY and P190 files were sourced from Nopims and QA/QC.</div><div> </div><div>2. SGY processing. The first reflector was extracted using PaleoScan™ software from each SGY file. The resulting surfaces are in time domain.</div><div> </div><div>3. P190 Filtering. Navigation files were filtered to extract depth values at the vessel echo-sounder location. If unavailable, the vessel reference point was selected instead. Depth values within P190 files are in metres, but typically obtained using constant velocities. As such, whenever velocities are specified, depth values were converted back to time for further calibration.</div><div> </div><div>4. Time\depth conversion. All depth values are converted from time to depth using site-specific synthetic velocity profiles derived from WOA2018 salinity and temperature databases using Doris software.</div><div> </div><div>5. Gridding. Individual surveys were gridded using inverse distance weight algorithm, and exported as 32-bit floating point Geotif. The bin size is defined as the square root of the average area occupied by a point.</div><div> </div><div>6. Datum Calibration. All grids and point clouds were converted to WGS84 and reduced to EGM2008. To do so, datasets were reduced to LAT using AHO depth sounding as calibration points before being converted to EGM2008 using AusCoastVDT software. It should be noted that LAT and EGM2008 are regarded as equivalent for areas beyond AusCoastVDT coverage, that are typically in water depth of more than 400m (Fig. 2).</div><div><br></div><div><br></div>
Reference System Information
- Reference system identifier
- EPSG/WGS 84 / geographic 2D (EPSG: 4326)
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/4ceda184-daaa-4dce-8f32-8b3ea7936b96
- 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.
Place and Communities Internal Contact
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/148609
- Date info (Creation)
- 2023-08-23T01:52:20
- Date info (Revision)
- 2023-08-23T01:52:20
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
- http://pid.geoscience.gov.au/dataset/ga/122551