Brief description
The Howard Channel bathymetry survey was acquired for the Australian Hydrographic Office (AHO) during the period 9 Aug 2023 – 13 Sep 2023. This was a contracted survey conducted for the Australian Hydrographic Office by EGS Australia as part of the Hydroscheme Industry Partnership Program. The survey area encompasses an area in Howard Channel. Bathymetry data was acquired using a Kongsberg EM2040C, and processed using CARIS HIPS and SIPS, and QIMERA 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: 53312441
name: AHO_SI1046_30m_MSL_WGS84
nb-of-points: 841
north: -11.980651
south: -12.187354
east: 131.257607
west: 130.846358
boundingbox-crs: EPSG:4326
start-date: 9-Aug-23
end-date: 13-Sep-23
survey area: Howard Channel, NT
platform-class: Ship | Boat
vessel: N/A
surveyor: N/A
classification: Official
abstract: This is a contracted survey conducted for the Australian Hydrographic Office by EGS as part of the Hydroscheme Industry Partnership Program. The survey area is Howard Channel, 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: EM2040D|EM2040C
sensor-type: Kongsberg
sensor-frequency: 300kHz
horizontal-positioning-method: V5 Applanix POS MV with Trimble RTX
vertical-reduction-method: Reduced to LAT using an AHO approved tidal model based on observed tides. Final adjustment to MSL by AHO
accepted-soundings-accuracy (unit(m)): 0.4
accepted-positional-accuracy (unit(m)): 2.5
accepted-survey-order: Order 1a
accepted-survey-order-url: https://iho.int › pubs › S-44_Edition_6.1.0_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: EGS Australia
statement_of_requirements: HIPP Statement of Requirements 2023.2
year of installation: 2023
number of sensor heads: Dual Head
number of soundings: 512
beamwidth along track (degree): 0.7° (EM2040D) |1° (EM2040C)
beamwidth across track (degree): 0.7° (EM2040D) |1° (EM2040C)
pulse length (μs): 200
absorption (dB/km): N/A
selectable depth range (m): max 550
Vessel speed (kt): 7 to 9
start port: Darwin, NT
end port: Darwin, NT
sensor operating mode: Dual Swath Mode
sensor swath (degrees): 70° <30m WD, 60° >30m WD
grid sounding density: 95% of nodes >5 soundings per node at survey resolution
processing software: CARIS HIPS&SIPS v 11.4.31|QPS QIMERA v 2.5.4
processing methodology: Processed in accordance with HIPP SOR 2023.2 using SDTP techniques, 1m CUBE, 1m SDTP and 2m SDTP 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: 08 09 2024
Issued: 13 09 2024
Data time period: 2023-08-09 to 2023-09-13
text: westlimit=130.8464; southlimit=-12.18735; eastlimit=131.2576; northlimit=-11.98065; projection=WGS 84 / geographic 2D (EPSG: 4326)
text: uplimit=-1; downlimit=-74; 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 |
User Contributed Tags
Login to tag this record with meaningful keywords to make it easier to discover
Other Information
Howard Channel (HIPP SI 1046) Bathymetry 2023 30m (zip) [12.9 MB]
Identifiers
- DOI : 10.26186/149889
- URI : pid.geoscience.gov.au/dataset/ga/149889
- global : 87f8cfe8-d8ff-47d2-8ac6-77bf85eb54b4
