1801586c-e84d-4929-88e0-7a06927126ed urn:uuid eng UTF-8 dataset dataset distributor NSW Department of Climate Change, Energy, the Environment and Water 2024-02-06-050440 .079124imageupload 2024-02-06-050440.079124imageupload 2021-10-04 creation 2021-04-10 released 2021-11-18 publication ISO 19115 2016 point 7279 EPSG Geodetic Parameter Dataset 2007-07-16 revision WSG84 / UTM Zone 56S NSW Environment Multi Beam Echo Sounder Gridded Data 1801586c-e84d-4929-88e0-7a06927126ed Gridded multi-beam echousounder (MBES) bathymetry and backscatter data acquired using NSW government's (NSW Department of Climate Change Energy Environment and Water) multi-beam echosounder (MBES) systems aboard RV's Bombora, Seascan and Glaucus. Fieldwork surveys were completed as part of the SeabedNSW program funded by NSW government under State-wide Science (2022-30), Coastal Reforms (2015-2022), HabMap Program (2005-2015) or under collaboration with partner agencies or institutions (DPI, Parks Australia, NESP). Surveys are predominantly on the open coast and within NSW state waters (2017) with Applanix Wavemaster POSMV (>2011) providing positioning, height (RTK) and 3D motion solution; or Edgetech swath system w sidescan (>2021). MBES was collected in GS+ (GeoAcoustics) or Hypack with attitude and positional data acquired in POSView and post processed using POSPac either Single-Base or Precise-Point-Positioning modules for improved vessel Smoothed Best Estimate of Trajectory. Data were cube modeled in Fledermaus/Qimera software (>2010) to IHO 1B standard and cleaned-soundings exported before being gridded using bin-weighted averaging (generally 5 m grid cell size) relative to Australian Height Datum and issued in grid coordinates (UTM WGS84 Zone55 or 56; GDA2020 Zone 55 or 56). General details on vessel setup, mobilisation and processing are provided at https://www.environment.nsw.gov.au/-/media/OEH/Corporate-Site/Documents/Research/Our-science-and-research/seabed-nsw-standard-operating-procedures-multibeam-surveying-190101.pdf with survey specific details in the Survey Report and survey Rigor Statement (provided upon request). Data packages provided via the Australian Oceanographic Data Network (https://portal.aodn.org.au/) include bathymetry and backscatter in multiple formats; while those provided on AusSeabed (https://portal.ga.gov.au/persona/marine) are gridded bathymetry and backscatter data as geotif only. Data are not to be used for navigation purposes. distributor NSW Department of Climate Change, Energy, the Environment and Water 2024-02-06-050440 .079124imageupload 2024-02-06-050440.079124imageupload imageryBaseMapsEarthCover Data within the broader collection were acquired from 2005 on-wards during various major internal programs. 149.4580078125 154.5556640625 -37.69077605563387 -27.807984756239158 MARINE-Biology MARINE-Coasts MARINE-Reefs MARINE-Geology-and-Geophysics ECOLOGY-Habitat GEOSCIENCES-Geomorphology dataset 2021-10-05T00:00:00 Gridded data predominantly lies within NSW state coastal waters with some smaller subsets >3NM over the NSW inner shelf or within Victorian state waters (Cape Howe). dataset 2021-10-05T00:00:00 Grids (XYZ, TIF, SD) of bathymetry are bin-weighted averages of cleaned soundings as determined from the Cube modelling and filtering; sounding point-cloud data will be provided a later stage or upon request dataset 2021-10-05T00:00:00 Generally, spatial positioning of MB points is better than 0.1 m (XYZ) at nadir (vessel centre line from POS MV data) with positioning of features mapped by outer beams (distant from vessel; relies on precise lever arm measures and calculations of patch test offsets) better than 0.25m (XYZ) - see Total Propagated Uncertainty in Survey Report and/or rigor statement. dataset 2021-10-05T00:00:00 Generally, external positional accuracy is XYZ better than 0.2 m (2011-2017; Geoswath surveys using POS DGPS and PPP post processing for improved SBET in POSPac) and better than 0.1 m (2017-present; R2Sonic surveys using POS G2 in real-time and SBS post processing for SBET). dataset 2020-07-16T00:00:00