Brief description
The Clarence Strait to Dundas Strait bathymetry survey was acquired for the Australian Hydrographic Office (AHO) during the period 4 Jul 2023 – 9 Sep 2023. This was a contracted survey conducted for the Australian Hydrographic Office as part of the Hydroscheme Industry Partnership Program. The survey area encompasses an area in Clarence Strait to Dundas Strait. Bathymetry data was acquired using Kongsberg EM2040-07 and Kongsberg EM2040-P, and processed using QIMERA and BeamworX AutoClean 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 (https://australian-multibeam-guidelines.github.io/). 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 most up-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: 41227868
name: AHO_SI1027_30m_MSL_WGS84
nb-of-points: 1457
north: -11.538411
south: -12.063656
east: 131.673707
west: 131.200744
boundingbox-crs: EPSG:4326
start-date: 4-Jul-23
end-date: 9-Sep-23
survey area: Clarence Strait to Dundas Strait, NT
platform-class: Ship
vessel: N/A
surveyor: N/A
classification: Offical
abstract: This is a contracted survey conducted for the Australian Hydrographic Office by Precision Hydrogrpahic Services as part of the Hydroscheme Industry Partnership Program. The survey area is Clarence Strait to Dundas 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: EM 2040-07|EM2040-P
sensor-frequency: 300 KHz
horizontal-positioning-method: Reduced to LAT using an AHO approved Hydorid model based on observed tides , adjsuted to MSL using AHO MSL-LAT model.
vertical-reduction-method: Reduced to LAT using an AHO approved tidal model based on observed tides and then shifted to MSL using AHO LAT-MSL separation model.
accepted-soundings-accuracy (unit(m)): 0.4
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: N/A
statement_of_requirements: HIPP Statement of Requirements 2022.2
year of installation: 2022
number of sensor heads: 1
number of soundings: 1024
beamwidth along track (degree): 1.3
beamwidth across track (degree): 1.3
pulse length (μs): 37
absorption (dB/km): Automatic
selectable depth range (m): Shallow Depth Mode
vessel speed (kt): 6 - 8
start port: Darwin, NT
end port: Darwin, NT
sensor operating mode: Ultra High Denisty
sensor swath (degrees): 126
grid sounding density: 95% of nodes >5 soundings per node at survey resolution
processing software: QPS Qimear 2.4.9|BeamworX AutoClean 2022.1.1
processing methodology: Processed in accordance with HIPP SOR 2022.2 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
PurposeTo derive bathymetry 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
Created: 07 09 2024
Issued: 13 09 2024
Data time period: 2023-07-04 to 2023-09-09
text: westlimit=131.2007; southlimit=-12.06366; eastlimit=131.6737; northlimit=-11.53841; projection=WGS 84 / geographic 2D (EPSG: 4326)
text: uplimit=-5; downlimit=-71; projection=MSL depth / vertical (EPSG: 5715)
Subjects
AusSeabed |
EARTH SCIENCES |
Earth Science | Oceans | Bathymetry/Seafloor Topography | Bathymetry |
HVC_144641 |
Multibeam |
Oceans |
Published_External |
bathymetric grids |
bathymetry |
geoscientificInformation |
multibeam |
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Other Information
Clarence Strait to Dundas Strait (HIPP SI 1027) Bathymetry 2022 30m (zip) [39.5 MB]
Identifiers
- DOI : 10.26186/149883
- URI : pid.geoscience.gov.au/dataset/ga/149883
- global : 14b9537f-cf62-4211-b123-f6ab97d8d218
