<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 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>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.</div><div>Full resolution surfaces available from AHO on request under restricted licence.</div><div><br></div><div>Survey metadata:</div><div>aho_id: 33119168</div><div>version: 1</div><div>name: SI 1016 North-East Beagle Gulf and Clarence Strait, NT&nbsp;</div><div>nb-of-points: 3122</div><div>north: -11.88307806</div><div>south: -12.23107026</div><div>east: 131.2172483</div><div>west: 130.4234212</div><div>boundingbox-crs: EPSG:4326</div><div>start-date: 1-May-21</div><div>end-date: 13-Jul-21</div><div>survey area: North-East Beagle Gulf and Clarence Strait, NT</div><div>platform-class: Ship</div><div>vessel: MV Offshore Guardian</div><div>surveyor: John Mullally, CPHS1</div><div>external-reference: SI 1016</div><div>classification: Official</div><div>abstract: This is a contracted survey conducted for the Australian Hydrographic Office by Guardian Geomatics as part of the Hydroscheme Industry Partnership Program. The survey area lies within North-East Beagle Gulf and Clarence Strait, NT</div><div>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.&nbsp;Full resolution surfaces available from AHO on request under restricted licence.</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: Latitude/Longitude (WGS 84)</div><div>vertical-datum: Mean Sea Level (MSL)</div><div>instrument-type: Multibeam Echosounder (MBES)</div><div>sensor-type: Kongsberg EM2040 07 MK II</div><div>sensor-frequency: 300 kHz</div><div>horizontal-positioning-method: Trimble BD982 (Starpack) using Marinestar G4+ and G2+ corrections with a ROVINS IMU.</div><div>vertical-reduction-method: Reduced to Lowest Astronomical Tides (LAT) using an AHO approved tidal model based on observed tides. Final adjustment to Mean Sea Level (MSL) by AHO.</div><div>accepted-soundings-accuracy (unit(m)): 0.55</div><div>accepted-positional-accuracy (unit(m)): 1</div><div>accepted-survey-order: Order 1A</div><div>accepted-survey-order-url: hydro.licensing@defence.gov <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 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>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.</div><div>Full resolution surfaces available from AHO on request under restricted licence.</div><div><br></div><div>Survey metadata:</div><div>aho_id: 33119168</div><div>version: 1</div><div>name: SI 1016 North-East Beagle Gulf and Clarence Strait, NT&nbsp;</div><div>nb-of-points: 3122</div><div>north: -11.88307806</div><div>south: -12.23107026</div><div>east: 131.2172483</div><div>west: 130.4234212</div><div>boundingbox-crs: EPSG:4326</div><div>start-date: 1-May-21</div><div>end-date: 13-Jul-21</div><div>survey area: North-East Beagle Gulf and Clarence Strait, NT</div><div>platform-class: Ship</div><div>vessel: MV Offshore Guardian</div><div>surveyor: John Mullally, CPHS1</div><div>external-reference: SI 1016</div><div>classification: Official</div><div>abstract: This is a contracted survey conducted for the Australian Hydrographic Office by Guardian Geomatics as part of the Hydroscheme Industry Partnership Program. The survey area lies within North-East Beagle Gulf and Clarence Strait, NT</div><div>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.&nbsp;Full resolution surfaces available from AHO on request under restricted licence.</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: Latitude/Longitude (WGS 84)</div><div>vertical-datum: Mean Sea Level (MSL)</div><div>instrument-type: Multibeam Echosounder (MBES)</div><div>sensor-type: Kongsberg EM2040 07 MK II</div><div>sensor-frequency: 300 kHz</div><div>horizontal-positioning-method: Trimble BD982 (Starpack) using Marinestar G4+ and G2+ corrections with a ROVINS IMU.</div><div>vertical-reduction-method: Reduced to Lowest Astronomical Tides (LAT) using an AHO approved tidal model based on observed tides. Final adjustment to Mean Sea Level (MSL) by AHO.</div><div>accepted-soundings-accuracy (unit(m)): 0.55</div><div>accepted-positional-accuracy (unit(m)): 1</div><div>accepted-survey-order: Order 1A</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: Guardian Geomatics</div><div>statement_of_requirements: HIPP SOR 2021.2</div><div>year of installation: 2021</div><div>number of sensor heads: 2022</div><div>number of soundings: 2048</div><div>beamwidth along track (degree): 0.7</div><div>beamwidth across track (degree): 0.7</div><div>pulse length (μs): Auto</div><div>absorption (dB/km): N/A</div><div>selectable depth range (m): Variable</div><div>vessel speed (kt): 7</div><div>start port: Darwin, NT</div><div>end port: Darwin, NT</div><div>sensor operating mode: Ultra High Density Equidistant&nbsp;</div><div>sensor swath (degrees): 140</div><div>grid sounding density: 95% of nodes >5 soundings per node at survey resolution</div><div>processing software: CARIS HIPS&SIPS v11.3.17</div><div>processing methodology: Processed in accordance with HIPP SOR 2021.2 using CUBE techniques, 1 and 2m CUBE surfaces generated as the final L3 dataset</div><div>grid resolution (m): 30</div><div>number of grids: 1</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, 1m and 2m 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 30 m resolution, referenced to MSL, WGS 84 (EPSG:4326).</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 › 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: Guardian Geomatics</div><div>statement_of_requirements: HIPP SOR 2021.2</div><div>year of installation: 2021</div><div>number of sensor heads: 2022</div><div>number of soundings: 2048</div><div>beamwidth along track (degree): 0.7</div><div>beamwidth across track (degree): 0.7</div><div>pulse length (μs): Auto</div><div>absorption (dB/km): N/A</div><div>selectable depth range (m): Variable</div><div>vessel speed (kt): 7</div><div>start port: Darwin, NT</div><div>end port: Darwin, NT</div><div>sensor operating mode: Ultra High Density Equidistant&nbsp;</div><div>sensor swath (degrees): 140</div><div>grid sounding density: 95% of nodes >5 soundings per node at survey resolution</div><div>processing software: CARIS HIPS&SIPS v11.3.17</div><div>processing methodology: Processed in accordance with HIPP SOR 2021.2 using CUBE techniques, 1 and 2m CUBE surfaces generated as the final L3 dataset</div><div>grid resolution (m): 30</div><div>number of grids: 1</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, 1m and 2m 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 30 m resolution, referenced to MSL, WGS 84 (EPSG:4326).</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>