Brief description
The Broome Reference Surfaces bathymetry survey was acquired for the Australian Hydrographic Office (AHO) during the period 25 Sep 2020 - 26 Sep 2020. This surface was created from a contracted national reference survey between Gantheaume Point and Talboys Rock, Broome WA, collected for the purpose of calibrating multibeam echosounders. It was conducted for the Australian Hydrographic Office as part of the Hydroscheme Industry Partnership Program, acquired using Kongsberg EM 2040D, and processed using Caris HIPS & SIPS. A grid in 0.5m resolution is provided for the surveyed site within this survey area in MSL, LAT and Ellipsoid vertical datum. The dataset was then exported as a 0.5m 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.
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.
Survey metadata:
aho_id: 49391833
name: AHO Reference Surface Broome 2023
nb-of-points: 4
north: -17.88544479
south: -17.89026362
east: 122.0703717
west: 122.0652449
boundingbox-crs: EPSG:4326
start-date: 25/09/2020
end-date: 26/09/2020
survey area: Northern Approaches to Broome
platform-class: Boat
vessel: N/A
surveyor: N/A
classification: Official
abstract: This is reference surface, derived from a contracted survey conducted for the Australian Hydrographic Office for the purpose of calibrating multibeam echosounders. It was collected as part of the Hydroscheme Industry Partnership Program. The survey area lies between Gantheaume Point and Talboys Rock, Broome WA.
Lineage (Description): "This surface is a 0.5 metre Shoal Depth True Position (SDTP) surface derived from International Hydrographic Organisation (IHO) Special Order survey, with an 0.5 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.
AHO Reference Surfaces are created for use as a reference surface for calibration of MBES systems. The AHO recommends using them in their native coordinate reference system, as reprojection algorithms may introduce spatial errors. Therefore, this dataset is only available for download from AHO."
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: ITRF2014 GRS80
projection: UTM 51S
vertical-datum: Mean Sea Level (MSL) | Lowest Astronomical Tide (LAT) | Ellipsoidal Height (ELLIPS)
instrument-type: Multibeam Echosounder (MBES)
sensor-type: Kongsberg EM 2040D
sensor-frequency: 300 KHz
horizontal-positioning-method: Applanix POS MV Oceanmaster (Primary) and Applanix POS MV Wavemaster (secondary) Position was provided by Marine Star G4+ PPP GNSS.
vertical-reduction-method: The data was collected using the native GNSS coordinate system, and converted to Ellipsoidal Height (ELL) by the contractor. The data were reduced from GNSS coordinates to Lowest Astronomical Tide (LAT) using an AHO-approved tidal model based on observed tides and adjusted to Mean Sea Level (MSL) by AHO.
accepted-soundings-accuracy (unit(m)): 0.23
accepted-positional-accuracy (unit(m)): 0.5
accepted-survey-order: Special Order
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 SOR v2020.2
year of installation: 2020
number of sensor heads: 2
number of soundings: 800
beamwidth along track (degree): 1.0°
beamwidth across track (degree): max 70°
pulse length (μs): 200μs
absorption (dB/km): 108.3-132.04 dB/km
selectable depth range (m): variable
vessel speed (kt): 6-8 knots
start port: Darwin, NT
end port: Darwin, NT
sensor operating mode: Dual Swath Mode
sensor swath (degrees): 70° (140° total)
grid sounding density: 0.5
processing software: CARIS HIPS AND SIPS 11.3.9
processing methodology: Processed in accordance with HIPP SOR 2021.2 using CUBE algorithm techniques, 1 and 2m CUBE surfaces generated as the final L3 dataset.
grid resolution (m): 0.5
number of grids: 3
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, 0.5m 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 0.5m resolution, referenced to MSL, ITRF2014 GRS80 UTM Zone 51S.
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: 23 11 2023
Data time period: 2020-09-25 to 2020-09-26
text: westlimit=122.0652; southlimit=-17.89026; eastlimit=122.0704; northlimit=-17.88544; projection=WGS 84 / UTM zone 51S / projected (EPSG: 32751)
text: uplimit=-21; downlimit=-32; projection=MSL depth / vertical (EPSG: 5715)
Subjects
AusSeabed |
EARTH SCIENCES |
Earth Science | Oceans | Bathymetry/Seafloor Topography | Bathymetry |
HVC_144641 |
Oceans |
Published_External |
bathymetric grids |
bathymetry |
geoscientificInformation |
marine |
multibeam |
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Other Information
AHO Reference Surface (Broome) 2023 0.5m (zip) [90.2 MB]
uri :
https://files.ausseabed.gov.au/survey/AHO%20Reference%20Surface%20(Broome)%202023%200.5m.zip
Identifiers
- DOI : 10.26186/149074
- URI : pid.geoscience.gov.au/dataset/ga/149074
- global : 2981782b-6dc7-40f7-8d7b-17f52352867f
