Brief description
The North-East Beagle Gulf and Clarence Strait bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the MV Offshore Guardian during the period 1 May 2021 – 13 Jul 2021. This was a contracted survey conducted for the Australian Hydrographic Office by Guardian Geomatics as part of the Hydroscheme Industry Partnership Program. The survey area encompases an area in North-East Beagle Gulf and Clarence Strait, Northern Territory. Bathymetry data was acquired using a Kongsberg EM2040 07 MK II, and processed using Caris Hips & Sips processing software. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.
This dataset is not to be used for navigational purposes.
Lineage
Maintenance and Update Frequency: asNeeded
Statement:
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.
This surface is a 30 metre Shoal Depth True Position (SDTP) surface derived from International Hydrographic Organisation (IHO) Order 1A, 1 and 2 metre Combined Uncertainty and Bathymetry Estimator (CUBE) surfaces supplied to the Australian Hydrographic Office (AHO), with depth, position, density and uncertainty preserved from the original surface.
Full resolution surfaces available from AHO on request under restricted licence.
Survey metadata:
aho_id: 33119168
version: 1
name: SI 1016 North-East Beagle Gulf and Clarence Strait, NT
nb-of-points: 3122
north: -11.88307806
south: -12.23107026
east: 131.2172483
west: 130.4234212
boundingbox-crs: EPSG:4326
start-date: 1-May-21
end-date: 13-Jul-21
survey area: North-East Beagle Gulf and Clarence Strait, NT
platform-class: Ship
vessel: MV Offshore Guardian
surveyor: John Mullally, CPHS1
external-reference: SI 1016
classification: Official
abstract: This is a contracted survey conducted for the Australian Hydrographic Office by Guardian Geomatics as part of the Hydroscheme Industry Partnership Program. The survey area lies within North-East Beagle Gulf and Clarence Strait, NT
Lineage (Description): This surface is a 30 metre Shoal Depth True Position (SDTP) surface derived from International Hydrographic Organisation (IHO) Order 1A, 1 and 2 metre Combined Uncertainty and Bathymetry Estimator (CUBE) surfaces supplied to the Australian Hydrographic Office (AHO), with depth, position, density and uncertainty preserved from the original surface. Full resolution surfaces available from AHO on request under restricted licence.
data-owner: Australian Hydrographic Office, Commonwealth of Australia
custodian: Geoscience Australia, Commonwealth of Australia
point-of-contact: hydro.licensing@defence.gov.au
legal-constraints: Creative Commons CC BY 4.0
geodetic-datum: WGS84
projection: Latitude/Longitude (WGS 84)
vertical-datum: Mean Sea Level (MSL)
instrument-type: Multibeam Echosounder (MBES)
sensor-type: Kongsberg EM2040 07 MK II
sensor-frequency: 300 kHz
horizontal-positioning-method: Trimble BD982 (Starpack) using Marinestar G4+ and G2+ corrections with a ROVINS IMU.
vertical-reduction-method: Reduced to Lowest Astronomical Tides (LAT) using an AHO approved tidal model based on observed tides. Final adjustment to Mean Sea Level (MSL) by AHO.
accepted-soundings-accuracy (unit(m)): 0.55
accepted-positional-accuracy (unit(m)): 1
accepted-survey-order: Order 1A
accepted-survey-order-url: https://iho.int › pubs › S-44_Edition_6.0.0_EN.pdf
usage-limitation: Not to be used for Navigation
contact-address: 8 Station St, Wollongong, NSW, Australia 2500
GCMD-keyword: EARTH SCIENCE>OCEANS>BATHYMETRY/SEAFLOOR TOPOGRAPHY
GA-keyword: AusSeabed, Bathymetry, Marine, Bathymetry Grids
name of survey contractor: Guardian Geomatics
statement_of_requirements: HIPP SOR 2021.2
year of installation: 2021
number of sensor heads: 2022
number of soundings: 2048
beamwidth along track (degree): 0.7
beamwidth across track (degree): 0.7
pulse length (μs): Auto
absorption (dB/km): N/A
selectable depth range (m): Variable
vessel speed (kt): 7
start port: Darwin, NT
end port: Darwin, NT
sensor operating mode: Ultra High Density Equidistant
sensor swath (degrees): 140
grid sounding density: 95% of nodes >5 soundings per node at survey resolution
processing software: CARIS HIPS&SIPS v11.3.17
processing methodology: Processed in accordance with HIPP SOR 2021.2 using CUBE techniques, 1 and 2m CUBE surfaces generated as the final L3 dataset
grid resolution (m): 30
number of grids: 1
Processing methodology:
This dataset was produced using CARIS HIPS & SIPS as follow:
1. Processed in accordance with HIPP SOR 2020v 1.2 using CUBE techniques, 1m and 2m CUBE surfaces generated as the final L3 product (a gridded surface derived from cleaned point data).
2. Data was provided to Geoscience Australia for publication.
3. The final processed grid was exported as a 32-bit floating point Geotiff at 30 m resolution, referenced to MSL, WGS 84 (EPSG:4326).
DATA QUALITY
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.
Errors found in this dataset should be reported to:
Corporate Data Manager
Geoscience Australia
GPO Box 378
Canberra ACT 2601, Australia
Email: Sales@ga.gov.au
Reported Errors will be rectified in subsequent data releases, if any.
Notes
PurposeAcquiring bathymetry dataset
Issued: 06 11 2023
Data time period: 2021-12-01 to 2022-01-24
text: westlimit=130.4234; southlimit=-12.23107; eastlimit=131.2172; northlimit=-11.88308; projection=WGS 84 / geographic 2D (EPSG: 4326)
text: uplimit=-2; downlimit=-65; projection=MSL depth / vertical (EPSG: 5715)
Subjects
AusSeabed |
Earth Science | Oceans | Bathymetry/Seafloor Topography | Bathymetry |
Earth Sciences |
HVC_144641 |
Oceans |
Published External |
Published_External |
bathymetric grids |
bathymetry |
geoscientificInformation |
multibeam |
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Other Information
North-East Beagle Gulf and Clarence Strait, Beagle Gulf, NT (HIPP SI 1016) Bathymetry 2021 30m (zip) [35.2 MB]
Identifiers
- DOI : 10.26186/149027
- URI : pid.geoscience.gov.au/dataset/ga/149027
- global : 850abf22-24c8-471a-af10-90222a9df311
