835bb66e7aa75dfba44cea4b8240ab6c English dataset Ben Smith Bibby HydroMap Ltd CAD/GIS Technician Ben.Smith@bibbyhydromap.com pointOfContact 2018-11-27 MEDIN Discovery metadata standard 2.3.8 urn:ogc:def:crs:EPSG::25831 2018_023_HOW03_Lot8_Sample_B01_Bathymetry_data 2018-11-16 publication 2018_023 Bibby HydroMap were commissioned in May 2018 by Orsted to carry out Geophysical and Benthic surveys at Horsea 03 Lots 5 and 8. The survey across the Lot 8 export route was completed under Bibby HydroMap's terms and conditions using MV Bibby Tethra, between 16th August and 3rd September 2018 with a 40m line spacing. The main objectives of the surveys were as follows: â?¢ Cable route engineering â?¢ Geo-hazard assessment â?¢ Consenting requirements o Identifying archaeological restrictions o Identifying protected ecological habitats â?¢ Planning of Geotechnical investigations â?¢ UXO clearance for Geotechnical investigations This dataset comprises of the bathymetry data across the survey area. Theo Gaussen Bibby HydroMap Ltd Senior Geophysicist dassh.enquiries@mba.ac.uk originator Theo Gaussen Bibby HydroMap Ltd Senior Geophysicist dassh.enquiries@mba.ac.uk custodian notPlanned Geographic Information System Marine Environmental Data and Information Network Elevation Hydrography GEMET - INSPIRE themes, version 1.0 2008-01-06 revision Bathymetry and Elevation SeaDataNet P021 parameter discovery vocabulary 2009-11-16 revision Not suitable for use in navigation otherRestrictions Not for public distribution English elevation inlandWaters 0.7557 1.1402 52.9341 53.1619 2018-08-16 2018-09-03 Theo Gaussen Bibby HydroMap Ltd Senior Geophysicist dassh.enquiries@mba.ac.uk distributor dataset Datum = VORF LAT Vessel = MV Bibby Tethra Equipment = Kongsberg EM2040-04, 400kHz, multi-detect Gridded CUBE surface created in QPS Qimera 1.7.0-1.7.3. Bathymetry survey line files manually checked for standard deviation (2 sigma), prior to undergoing CUBE filtering. Features manually inspected/cleaned and hit counts checked. Data acquired using GNSS 'accurate heights' method and reduced using VORF LAT geoid-ellipsoid separation model. XYZ exported from QPS Qimera and imported into Blue Marble Global Mapper 19 as elevation grid. 1km x 1km Tiled .TIFF, .FLT and .XYZ exported from Global Mapper, and .TIFF and .FLT imported into ESRI ArcMap 10 to create .OVR and .STX files. 0.09m average uncertainty, calculated from CUBE surface at 1m grid resolution. MBES Contacts â?? MBES targets were picking from a 0.25m surface in QPS Qimera 1.7.3 before exporting an XYZ point cloud. The point cloud was then converted to a single point per target .shp file in ESRI ArcGIS (ArcMap) MBES Trackplot- Logfile exports from QPS QINSy (GNSS position as received by QINSy). Trackplot line and point generation and annotation in ESRI ArcGIS (ArcMap)