Full description
The Rottnest Reference Surface was created from a bathymetry survey acquired for the Australian Hydrographic Office (AHO) on 11 December 2022. This surface was created from a contracted national reference survey adjacent to Rottnest Island, 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, using a Kongsberg EM2040P and processed using Caris HIPS & SIPS. Separate grids in 0.5m and 2m resolution are provided for the two surveyed sites within this survey area in MSL, LAT and Ellipsoid vertical datums. The datasets were exported as 0.5m and 2m resolution, 32-bit floating point GeoTIFF grids.
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.
Survey metadata:
aho_id: 49399637
name: AHO Reference Surface Rottnest, WA
nb-of-points: 4
north: -31.961126
south: -32.101048
east: 115.637137
west: 115.307799
boundingbox-crs: EPSG:4326
start-date: 11-Dec-22
end-date: 11-Dec-22
survey area: Cape Leeuwin, WA
platform-class: Ship
vessel: N/A
surveyor: N/A
classification: Official
abstract: This is a reference surface derived from a contracted survey conducted for the Australian Hydrographic Office for the purpose of calibrating multibeam echosounders as part of the Hydroscheme Industry Partnership Program. The survey area lies adjacent to Rottnest Island, WA
Lineage (Description): This surface is a 0.5 metre Shoal Depth True Position (SDTP) surface derived from International Hydrographic Organisation (IHO) Special Order, 1 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. The AHO recommends using these surfaces in their native coordinate reference system, as reprojection algorithms may introduce spatial errors. 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: [email protected]
legal-constraints: Creative Commons CC BY 4.0
geodetic-datum: WGS84
projection: UTM 50S
vertical-datum: Ellipsoidal height (ELLIPS) | Mean Sea Level (MSL) | Lowest Astronomical Tide (LAT)
instrument-type: Multibeam Echosounder (MBES)
sensor-type: Kongsberg EM2040P
sensor-frequency: 300 kHz
horizontal-positioning-method: iXblue ROVINS Inertial Navigation System - Interfaced to Veripos LD8 GNSS Receiver (Apex service PPP)
vertical-reduction-method: The data was collected using the GPS coordinate system, and converted to Ellipsoidal Height (ELL) by the contractor. The data were reduced from GPS 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)): 0.76
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: MMA
statement_of_requirements: HIPP SOR 2022.3
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): 150
absorption (dB/km): N/A
selectable depth range (m): N/A
vessel speed (kt): 8
start port: Fremantle, WA
end port: Fremantle, WA
sensor operating mode: Equidistant dynamic dual ping mode.
sensor swath (degrees): 65-70
grid sounding density: 95% of nodes >5 soundings per node at survey resolution
processing software: Teledyne Caris HIPS
processing methodology: Processed in accordance with HIPP SOR 2022.3 using CUBE techniques, 1 CUBE surfaces generated as the final L3 dataset
grid resolution (m): 0.5m, 2m
number of grids: 4
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/Transverse Mercator.
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: [email protected]
Reported Errors will be rectified in subsequent data releases, if any.
Notes
PurposeAcquiring bathymetry dataset
Issued: 22 04 2024
Data time period: 2022-12-11 to 2022-12-11
text: westlimit=115.3078; southlimit=-32.10105; eastlimit=115.6371; northlimit=-31.96113; projection=WGS 84 / UTM zone 50S / projected (EPSG: 32750)
text: uplimit=-119; downlimit=-22; 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 |
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Other Information
AHO Reference Surface (Rottnest) 2023 0.5-2m (zip) [74.3 MB]
Identifiers
- DOI : 10.26186/149392
- URL : pid.geoscience.gov.au/dataset/ga/149392
- global : fc6a30f8-81fc-406a-9b1d-e8e283bfb0f2
