Abstract

The TOPAS Sea Trials survey GA-2361, was acquired by Geoscience Australia after the installation of the new Sub bottom profiler (TOPAS) onboard the RV Southern Surveyor during the 9th and the 10th of December 2004. The survey loacation was offshore Brisbane. The aim of the survey was to test the new sub bottom profiler installed onboard. The bathymetry grids consists of 5,10 and 40 resolution projected in Easting and Northing WGS84, UTM56S.
Google map showing geographic bounding box with values North bound -26.61 East bound 154.78 West bound 153.07 South bound -27.45
Downloads
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays

Product Type/Sub Type

dataset - Marine Data - Bathymetry Grid

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2013

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

Marine Data
Bathymetry Grid
marine survey
marine
continental shelf
bathymetry
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-26.61
East bound
154.78
West bound
153.07
South bound
-27.45

TEMPORAL EXTENT

2004-12-09 / 2004-12-10

Lineage

The multibeam bathymetry was acquired by the following survey: - Survey Name: GA-2361 TOPAS Sea Trials - Vessel Name: RV Southern Surveyor - Institution: Geoscience Australia - Country: Australia - Operator: CSIRO - Multibeam system: Kongsberg EM300 - Year of installation: 2004 - Nominal sonar frequency: 30 kHz - Number of beams: 135 beams - Beamwidth across track: 1 degree - Beamwidth alon track: 1 degree - Pulse length: variable - Selectable depth range: 10m - 5000m - Vessel speed: 7 - 8 knots - Start Date: 09/12/2005 - End Date: 10/12/2005 - Start Port: Brisbane - End Port: Brisbane The Mentelle Basin survey, GA-0293 SS08/2005 was acquired by Geoscience Australia onboard the RV Southern Surveyor from the 9th of December to the 10th of December 2004. The Chief scientist onboard was Mr. Fred Kroh. This dataset was acquired and processed onboard by Cameron Buchanan and further processing was conducted in the office by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2. 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 artifacts. 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-56S. 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. 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 artifacts 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 in ASCII XYZ as well as geotif formats of 5,10 and 40m resolution. 10- Using CARIS Base editor 4.0 the grids were exported as ESRI ASCII grid, then imported into ARC catalogue/info to create a raster file for the entire survey.

Digital Transfer Options

onLine

DISTRIBUTION Format

misc
XYZ ascii
csar
misc
tif

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

d87bbd30-583b-4402-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2013-03-22

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays