AHO Reference Surfaces Lombadina Point 0.5m 2023 (20230013R)  

Authors / CoAuthors

Australian Hydrographic Office | Commonwealth of Australia (Australian Hydrographic Office)

Abstract

<div>The Lombadina Point Reference Surfaces bathymetry survey was acquired for the Australian Hydrographic Office (AHO) on 28 Nov 2022. This surface was created from a contracted national reference survey at Lombadia Point WA, collected for the purpose of calibrating multibeam echosounders.&nbsp;It was conducted for the Australian Hydrographic Office as part of the Hydroscheme Industry Partnership Program, acquired using Kongsberg EM2040P MKII, and processed using QPS Qimera and 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.</div><div>This dataset is not to be used for navigational purposes.</div> Temporarily removed from External publication 9/01/2024 on request of N. Lennard.

Product Type

dataset

eCat Id

149073

Contact for the resource

Digital Object Identifier

https://dx.doi.org/10.26186/149073

Keywords

theme.ANZRC Fields of Research.rdf

• EARTH SCIENCES

GCMD Keywords

• Earth Science | Oceans | Bathymetry/Seafloor Topography | Bathymetry

( {1} )

• bathymetry

( {1} )

• multibeam

( {1} )

• bathymetric grids

( {1} )

• AusSeabed

( {1} )

• HVC_144641

( {1} )

• Oceans

( {1} )

• Published_External

( {1} )

• marine

Publication Date

2023-11-23T03:22:12

Creation Date

Security Constraints

Australian Government Security Classification System    

Classification - unclassified

Legal Constraints

Use - license otherRestrictions

Status

completed

Purpose

Acquiring bathymetry dataset

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Lineage

<div>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 <br>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.</div><div><br></div><div>Survey metadata:</div><div>aho_id: 49391835</div><div>name: AHO Reference Surface Lombadina Point 2023</div><div>nb-of-points: 1366</div><div>north: -16.49417762</div><div>south: -16.50056008</div><div>east: 122.748499</div><div>west: 122.7418835</div><div>boundingbox-crs: EPSG:4326</div><div>start-date: 28-Nov-22</div><div>end-date: 28-Nov-22</div><div>survey area: Lombadina Point, WA</div><div>platform-class: Ship</div><div>vessel: N/A</div><div>surveyor: N/A</div><div>external-reference: N/A</div><div>classification: Official</div><div>abstract: This surface was created from a contracted national reference survey at Lombadina Point 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.</div><div>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.&nbsp;&nbsp;</div><div>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. This dataset is only available for download from AHO."</div><div>data-owner: Australian Hydrographic Office, Commonwealth of Australia</div><div>custodian: Geoscience Australia, Commonwealth of Australia</div><div>point-of-contact: hydro.licensing@defence.gov.au</div><div>legal-constraints: Creative Commons CC BY 4.0</div><div>geodetic-datum: WGS84</div><div>projection: UTM 51S</div><div>vertical-datum: Mean Sea Level (MSL) | Lowest Astronomical Tide (LAT) | Ellipsoidal Height (ELLIPS)&nbsp;</div><div>instrument-type: Multibeam Echosounder (MBES)</div><div>sensor-type: Kongsberg EM2040P MKII</div><div>sensor-frequency: 300 kHz</div><div>horizontal-positioning-method: Septentrio AsterX‐U Marine GNSS</div><div>vertical-reduction-method: The data was collected using a 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.</div><div>accepted-soundings-accuracy (unit(m)): 0.21</div><div>accepted-positional-accuracy (unit(m)): 0.5</div><div>accepted-survey-order: Special Order</div><div>accepted-survey-order-url: https://iho.int › pubs › S-44_Edition_6.0.0_EN.pdf</div><div>usage-limitation: Not to be used for Navigation</div><div>contact-address: 8 Station St, Wollongong, NSW, Australia 2500</div><div>GCMD-keyword: EARTH SCIENCE>OCEANS>BATHYMETRY/SEAFLOOR TOPOGRAPHY</div><div>GA-keyword: AusSeabed, Bathymetry, Marine, Bathymetry Grids</div><div>name of survey contractor: N/A</div><div>statement_of_requirements: HIPP SOR 2020 v1.2</div><div>year of installation: 2022</div><div>number of sensor heads: 2</div><div>number of soundings: 400-800</div><div>beamwidth along track (degree): 1.3</div><div>beamwidth across track (degree): 140</div><div>pulse length (μs): 14 μs</div><div>absorption (dB/km): N/A</div><div>selectable depth range (m): 2-150</div><div>vessel speed (kt): 5-7 kt</div><div>start port: Lombadina Point WA</div><div>end port: Lombadina Point WA</div><div>sensor operating mode: Dual head - High Density Equidistant&nbsp;</div><div>sensor swath (degrees): 140</div><div>grid sounding density: 0.5</div><div>processing software: QPS Qimera and CARIS HIPS</div><div>processing methodology: Processed in accordance with HIPP SOR 2020 v1.2 using CUBE techniques, 0.5m CUBE surface generated as the final L3 dataset</div><div>grid resolution (m): 0.5</div><div>number of grids: 3</div><div><br></div><div><br></div><div>Processing methodology:</div><div>This dataset was produced using CARIS HIPS & SIPS as follow:</div><div>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).</div><div>2. Data was provided to Geoscience Australia for publication.</div><div>3. The final processed grid was exported as a 32-bit floating point Geotiff at 0.5m resolution, referenced to MSL, WGS 84 (EPSG:32751).</div><div><br></div><div>DATA QUALITY</div><div><br></div><div>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.</div><div>Errors found in this dataset should be reported to:</div><div>Corporate Data Manager</div><div>Geoscience Australia</div><div>GPO Box 378</div><div>Canberra ACT 2601, Australia</div><div>Email: Sales@ga.gov.au</div><div>Reported Errors will be rectified in subsequent data releases, if any.</div>

Parent Information

Extents

[-16.50056, -16.49418, 122.7419, 122.7485]

Reference System

WGS 84 / UTM zone 51S / projected (EPSG: 32751)

Spatial Resolution

Service Information

Associations

Downloads and Links

Source Information