Product catalogue
KN145L4 Perth Canyon Bathymetry 1994 (1179/19940008S)
The KN145L4 bathymetry survey was acquired by the Woods Hole Oceanographic Institution onboard the Woods Hole Oceanographic Institution (WHOI) Research Vessel Knorr from the 19 November to 22 November 1994 using the SeaBeam 2112 sonar system. The bathymetry dataset was acquired while the Research Vessel Knorr was surveying the Perth Canyon in Australia.
This dataset contains the 128-210m resolution, 32-bit geotiffs of the KN145L4 survey produced from the processed SeaBeam system using the CARIS HIPS and SIPS software.
Appropriate acknowledgment must be given to both the Dr. (Purdy, G. M.) ( http://www.marine-geo.org/tools/search/entry.php?id=KN145L4#datasets) and to the Marine Geoscience Data System (www.marine-geo.org).
Not to be used for navigational purposes
Simple
Identification info
- Date (Creation)
- 2025-11-13
- Date (Publication)
- 2025-12-07
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/150795
Identifier
- Cited responsible party
-
Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Author Purdy, M.
External Contact
- Purpose
-
To derive seabed information for the purpose of supporting the sustainable use of our marine environment and jurisdiction; strengthening our resilience to natural hazards and enabling location-based decisions and actions through best practice digital mapping, Earth observations and precise positioning.
- Status
- Point of contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Resource provider Place and Communities Division
External Contact Point of contact Pham, Q.
Internal Contact Custodian Commonwealth of Australia (Geoscience Australia)
Voice Owner Woods Hole Oceanographic Institution
Voice Principal investigator Purdy, M.
External Contact Collaborator Woods Hole Oceanographic Institution
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
Temporal element
- Time period
- 1994-11-19 1994-11-22
Vertical element
- Minimum value
- -4600.66
- Maximum value
- 255
Identifier
- Code
- 3855
- Codespace
-
EPSG
- Version
-
12
- Description
-
EGM2008 geoid height (EPSG:3855)
- Maintenance and update frequency
- As needed
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
- Project
-
-
AusSeabed
-
Resourcing Australia's Prosperity
-
Australia-wide geoscience data
-
Offshore Mapping
-
- Keywords
-
-
Marine
-
- Keywords
-
-
Bathymetry
-
- Platform
-
-
RV Knorr
-
- Instrument
-
-
multi-beam echosounders
-
- Keywords
-
-
Indian Ocean
-
- theme.ANZRC Fields of Research.rdf
-
-
EARTH SCIENCES
-
- Keywords
-
-
Published_External
-
Resource constraints
- Title
-
Creative Commons - Attribution 4.0 International
- Alternate title
-
CC BY
- Edition
-
4.0
- Addressee
-
Role Organisation / Individual Name Details User Any
- Use constraints
- License
- Use constraints
- Other restrictions
- Other constraints
-
(c) Woods Hole Oceanographic Institution 2025
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
- OnLine resource
-
Perth Canyon Bathymetry 210m 1994
Perth Canyon Bathymetry 210m 1994
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
Resource lineage
- Statement
-
The KN145L4, was acquired by the Columbia University onboard the Woods Hole Oceanographic Institution onboard the Woods Hole Oceanographic Institution (WHOI) Research Vessel Knorr during the period of the 19 November to 22 November 1994.
The Chief Scientist onboard during the transit was Dr. Mike Purdy.
This dataset was acquired and processed onboard by Woods Hole Oceanographic Institution (WHOI) and further processing was conducted in Geoscience Australia 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 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-UTMXXS.
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 colored images for presentation and reporting and as final processed data in 32bit geotiff format at the optimum resolution the data can provide.
Reference System Information
Identifier
- Code
- 4326
- Codespace
-
EPSG
- Version
-
12
- Description
-
WGS 84 (EPSG:4326)
- Hierarchy level
- Collection hardware
Platform
Identifier
- Code
- RV Knorr
Instrument
Identifier
- Code
- Seabeam 2112
- Type
-
multi-beam echosounders
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/d22bc244-8c3c-4a68-a782-7971ab7816ff
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Owner Pham, Q.
Internal Contact Point of contact Pham, Q.
Internal Contact
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with uuid
- Citation identifier
- eCatId/150795
- Metadata linkage
-
https://ecat.ga.gov.au/geonetwork/srv/api/records/d22bc244-8c3c-4a68-a782-7971ab7816ff
- Date info (Creation)
- 2026-03-25T05:24:50.053Z
- Date info (Creation)
- 2026-03-25T00:20:52.822Z
- Date info (Creation)
- 2025-12-15T22:43:45.858Z
- Date info (Creation)
- 2025-12-03T08:36:23.89Z
- Date info (Revision)
- 2026-06-21T22:27:11.638Z
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