North Perth Basin Bathymetry Survey (SS2011_v05/GA-0332)  

Authors / CoAuthors

Jones, A. | Wilson, O.

Abstract

This resource includes bathymetry data acquired by Geoscience Australia bathymetry survey during the period of 21 September and 17 October 2011 onboard the RV Southern Surveyor using a Kongsberg Maritime EM300 multibeam sonar. The SS2011-V05/ GA-0332/20110018S bathymetry survey was led by Dr. Andrew Jones (Geoscience Australia). The primary objectives of the survey were to map the spatial distribution of seepage sites and characterise the nature of the seepage at these sites (gas vs oil, macroseepage vs microseepage; palaeo vs modern day seepage) on the basis of: acoustic signatures in the water column, shallow subsurface and on the seabed; geochemical signatures in rock and sediment samples and the water column; and biological signatures on the seabed. This dataset contains a 32 and 15m-resolution, 32-bit floating point GeoTIFF grid files of the bathymetry in the study area, derived from the processed EM300 bathymetry data, using CARIS HIPS and SIPS software. Those grids were projected to WGS84 UTM 49S and 50S. Vertical Datum: MSL This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.

Product Type

dataset

eCat Id

73437

Contact for the resource

Digital Object Identifier

http://dx.doi.org/10.4225/25/53D9B0F06A6FA

Keywords

• Marine DataBathymetry Grid

( Theme )

• bathymetry

( Theme )

• marine

• AU-WA

Australian and New Zealand Standard Research Classification (ANZSRC)

• Marine Geoscience

• Published_External

• HVC_144641

• AusSeabed

theme.ANZRC Fields of Research.rdf

• EARTH SCIENCES

Publication Date

2012-01-01T00:00:00

Creation Date

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

Purpose

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Lineage

While AusSeabed aims to publish data based on the requirements stated in the AusSeabed multibeam guidelines (version 1, https://australian-multibeam-guidelines.github.io), we will also publish interim products (version 0) that are currently available, but have not yet been standardised (version 1). <br> Users should be aware that V1 products will always supersede V0 products. This is version V0.<br> This dataset was produced using CARIS HIPS & SIPS and the AusSeabed-recommended processing methodology as follows.<br> <br> Survey metadata:<br> This resource includes bathymetry data acquired during the North Perth Basin bathymetry survey acquired by Geoscience Australia during the period of 21 September to 17 October 2011 onboard the RV Southern Survey using a Kongsberg EM300 multibeam sonar. North Perth Basin bathymetry survey was led by Dr. Andrew Jones (Geoscience Australia).<br> <br> The primary objectives of the survey were to map the spatial distribution of seepage sites and characterise the nature of the seepage in the North Perth Basin.<br> <br> Metadata:<br> <br> The multibeam bathymetry was acquired by the following survey:<br> - Chief Scientist: Andrew Jones<br> - Acquisitiont/Processing: Olivia Wilson/ Michele Spinoccia<br> - Survey Name: North Perth Basin Bathymetry Survey (SS2011_v05/20110018S)<br> - Vessel Name: RV Southern Surveyor<br> - Institution: Geoscience Australia<br> - Country: Australia<br> - Operator: CSIRO<br> - Multibeam system: Kongsberg EM300<br> - Year of installation: 2004<br> - Nominal sonar frequency: 30 kHz<br> - Number of beams: 135 beams<br> - Beamwidth along track: 1 degree<br> - Beamwidth across track: 1 degree<br> - Pulse length: variable<br> - Selectable depth range: 10m - 5000m<br> - Vessel speed: 7 - 8 knots<br> - Start Date: 21/09/2011<br> - End Date: 17/10/2011<br> - Start Port: Geraldton<br> - End Port: Fremantle<br> - Min Depth: -10.29m<br> - Max Depth: 1202.1m<br> - Grid resolution: 32 and 15m<br> - Number of grids: 2<br> - Total surface coverage: 3346.60 km2 (port to port)<br> - Vertical Datum: MSL<br> - Horizontal Datum: WGS84 <br> - Projection: UTM-49S and 50S<br> - Use Limitation: This dataset is not to be used for navigational purposes.<br> <br> <br> Processing methodology:<br> <br> The North Perth Basin Bathymetry Survey, SS2011-v05/ GA-0332/ 20110018S was acquired by Geoscience Australia onboard the RV Southern Surveyor from the 21st of September to the 17th of Octber 2011. <br> The Chief scientist onboard was Dr. Andrew Jones.<br> This dataset was acquired onboard by Olivia Wilson and further processing was conducted in the office by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2.<br> 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.<br> 2. A new project was then created and the vessel configuration file was attached to the project file. <br> 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. <br> 4. The motion sensor, DGPS and heading data were then cleaned using a filter that averaged adjacent data to remove artefacts. <br> 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.<br> 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-49S and 50S.<br> 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 artifacts and noisy data not removed by the filtering process were removed manually using Swath and subset editors modules of the Caris HIPS/SIPS software.<br> 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.<br> In GA the tide was applied to the grid to correct for tidal variations and velocity corrections were performed to correct for different artifacts and mismatches. <br> 9. The processed data was finally exported as grids soundings or false colored images for presentation and reporting and as final processed data in geotif formats of 32 and 15m resolution.<br> <br> AVAILABILITY Copies of this publication can be obtained from: Commonwealth of Australia (Geoscience Australia) clientservices@ga.gov.au Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378, Canberra, ACT, 2601, Australia Call 1800 800 173,02 6249 9960<br> <br> DATA QUALITY <br> This dataset has been subject to independent post-production validation and testing. Tests have been performed for data completeness, correct spatial representation, attribute accuracy, logical consistency, metadata completeness and correctness, and where appropriate for compliance with Geoscience Australia's data dictionaries. <br> Errors found in this dataset should be reported to: Corporate Data Manager Geoscience Australia GPO Box 378 Canberra ACT 2601, Australia <br> Email: Sales@ga.gov.au Reported Errors will be rectified in subsequent data releases, if any.<br> <br> DISCLAIMER <br> This material is copyright Commonwealth of Australia. Other than the Coat of Arms and departmental logo, you may reproduce, distribute, adapt and otherwise freely deal with this material for all purposes (retaining this notice) without charge on the condition that you include the acknowledgement "copyright Commonwealth of Australia (year of publication) and (title of the source)" on all uses. You may not sub-licence this material or use it in a misleading context. While every effort has been made to ensure accuracy, the Commonwealth does not accept any responsibility for the accuracy, completeness or currency of this material, and will not be liable for any loss or damage arising from use of, or reliance on, the material. Nothing in this licence affects the operation of any applicable exception or limitation contained in the Copyright Act 1968. This dataset is not to be used for any navigation purposes. Further information may be obtained by contacting copyright@ga.gov.au<br> <br> COPYRIGHT (C) Commonwealth of Australia (Geoscience Australia) 2022.<br>

Parent Information

Extents

[-32.10, -27.00, 112.20, 115.50]

Reference System

WGS 84 / UTM zone 49S (EPSG:32749) WGS 84 / UTM zone 50S (EPSG:32750) MSL depth (EPSG:5715)

Spatial Resolution

Service Information

Associations

Downloads and Links

North Perth Basin 2011 15-32m [28.6 MB]  

Source Information

Source data not available.