<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>The multibeam bathymetry was acquired by the following survey:</div><div>- Survey Name: Wallaby-Zenith Fracture Zone</div><div>- Vessel Name: RV DSSV Pressure Drop</div><div>- Institution: The University of Western Australia</div><div>- Country: Australia</div><div>- Operator: Caladan Oceanic, LLC</div><div>- Multibeam system: EM124</div><div>- Year of installation: 2019</div><div>- Nominal sonar frequency: 12 kHz</div><div>- Number of heads: 1</div><div>- Number of soundings: 1600</div><div>- Beamwidth along track: 0.5 degree</div><div>- Beamwidth across track: 1 degree</div><div>- Pulse length: variable</div><div>- Selectable depth range: variable</div><div>- Vessel speed: Unknown</div><div>- Start Date: 08/03/2021</div><div>- End Date: 02/06/2021</div><div>- Start Port: Dampier</div><div>- End Port: Fremantle</div><div>- Grid resolution: 64m, 128m</div><div>- Number of grids: 2</div><div>- Use Limitation: This dataset is not to be used for navigational purposes.</div><div>- This dataset is published with the permission of the CEO, Geoscience Australia</div><div>- Vertical Datum: EGM2008</div><div>- Horizontal Datum: WGS84 (EPSG:4326)</div><div><br></div><div><br></div><div>Processing methodology:</div><div>The bathymetric dataset was processed using QPS Qimera v2.5 as follow:</div><div>1. QPD generation</div><div>2. Raytracing with earest in distance withing time</div><div>3. Tide correction</div><div>4. TPU application</div><div>5. Data cleaning</div><div>6. QC</div><div>7. Surface Processing </div><div>8. Cube surface generation</div><div>9. Surface finalisation</div><div>10. Export surface as a 32-bit floating Geotiff, referenced to EGM2008, WGS 84 (EPSG:4326).</div><div>11. GSF Export</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><div><br></div> Sales@ga.gov <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>The multibeam bathymetry was acquired by the following survey:</div><div>- Survey Name: Wallaby-Zenith Fracture Zone</div><div>- Vessel Name: RV DSSV Pressure Drop</div><div>- Institution: The University of Western Australia</div><div>- Country: Australia</div><div>- Operator: Caladan Oceanic, LLC</div><div>- Multibeam system: EM124</div><div>- Year of installation: 2019</div><div>- Nominal sonar frequency: 12 kHz</div><div>- Number of heads: 1</div><div>- Number of soundings: 1600</div><div>- Beamwidth along track: 0.5 degree</div><div>- Beamwidth across track: 1 degree</div><div>- Pulse length: variable</div><div>- Selectable depth range: variable</div><div>- Vessel speed: Unknown</div><div>- Start Date: 08/03/2021</div><div>- End Date: 02/06/2021</div><div>- Start Port: Dampier</div><div>- End Port: Fremantle</div><div>- Grid resolution: 64m, 128m</div><div>- Number of grids: 2</div><div>- Use Limitation: This dataset is not to be used for navigational purposes.</div><div>- This dataset is published with the permission of the CEO, Geoscience Australia</div><div>- Vertical Datum: EGM2008</div><div>- Horizontal Datum: WGS84 (EPSG:4326)</div><div><br></div><div><br></div><div>Processing methodology:</div><div>The bathymetric dataset was processed using QPS Qimera v2.5 as follow:</div><div>1. QPD generation</div><div>2. Raytracing with earest in distance withing time</div><div>3. Tide correction</div><div>4. TPU application</div><div>5. Data cleaning</div><div>6. QC</div><div>7. Surface Processing </div><div>8. Cube surface generation</div><div>9. Surface finalisation</div><div>10. Export surface as a 32-bit floating Geotiff, referenced to EGM2008, WGS 84 (EPSG:4326).</div><div>11. GSF Export</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><div><br></div>