5f49de0fd7d5c542e74c6aa8107081c1 English dataset Koen Vanstaen Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory +44 (0)1502 562244 +44 (0)1502 513865 Pakefield Road Lowestoft NR33 OHT koen.vanstaen@cefas.co.uk pointOfContact 2021-05-27 MEDIN Discovery metadata standard 2.3.8 urn:ogc:def:crs:EPSG::4326 2009 Center for Environment, Fisheries and Aquaculture Science: Areas surveyed with multibeam to map the seabed habitat 2009-04-06 publication NETGAIN0029 Cefas collects multibeam bathymetry and backscatter data as part of seabed and habitat mapping surveys. These surveys are predominantly conducted as part of environmental assessments of human activities or in the context of the identification and assessment of areas of conservation interest. Cefas has the capability to collect multibeam data from its Research Vessel Cefas Endeavour, but data may also be collected by sub-contractors. Polygon areas represent approximate extents of survey data gathered. In some areas only data corridors were collected, rather than data for the entire polygon. Data are generally acquired for seabed characterisation and habitat mapping purposes. Surveys may not meet all requirements of the IHO Order 1 Standard. Surveys are generally reduced to Mean Sea Level (MSL). Koen Vanstaen Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory +44 (0)1502 562244 +44 (0)1502 513865 Pakefield Road Lowestoft NR33 OHT koen.vanstaen@cefas.co.uk originator Koen Vanstaen Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory +44 (0)1502 562244 +44 (0)1502 513865 Pakefield Road Lowestoft NR33 OHT koen.vanstaen@cefas.co.uk custodian asNeeded Geographic Information System Marine Environmental Data and Information Network Oceanographic geographical features GEMET - INSPIRE themes, version 1.0 2008-01-06 revision Acoustic backscatter in the water column SeaDataNet P021 parameter discovery vocabulary 2009-11-16 revision Copyright otherRestrictions Available to download in various formats from the The Maritime and Coastguard Agency (MCA) website. The dataset should be acknowledged to Cefas. English oceans Charting Progress 2 Sea Areas 2009-06-18 creation Eastern Channel Charting Progress 2 Sea Areas 2009-06-18 creation Western Channel and Celtic Sea Charting Progress 2 Sea Areas 2009-06-18 creation Irish Sea Charting Progress 2 Sea Areas 2009-06-18 creation Southern North Sea -5.8552 2.1881 49.8986 55.0730 2009-01-01 2009-04-06 Netgain (2011) Final Recommendations Submission to Natural England & JNCC. Report to Natural England. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory Data Manager +44 (0)1502 562244 +44 (0)1502 513865 Pakefield Road Lowestoft NR33 OHT data.manager@cefas.co.uk distributor dataset The polygons represent the approximate extents of areas where survey data was obtained by Cefas or a sub-contractor which undertook the survey. Polygons were created from the bathymetric products created by Cefas or the survey sub-contractor and digitised by Cefas. Cefas staff populated an attribute table (developed and provided by MCA) with the following attributes: HI_Name - Hydrographic Instruction name. Combination of the name of the survey area and the unique Cefas Cruise Code. Often, the survey area name relates to a dreged material disposal site, a licensed aggregate extraction site, a windfarm development area or a major nearby natural feature. HI_Number - A unique HI reference number which is used internally by the MCA and UK Hydrographic Office (UKHO). HI numbers are not used by Cefas and left blank. Contract - The Cefas contract code under which this work was undertaken. Contractor - The organisation which undertook the work. Standard - The overall standard to which the survey data was gathered. Start_Date - The day which the contractor started offshore operations on the polygon area. End_Date - The day which the contractor completed offshore operations on the polygon area. FY_Comissi - The financial year (April 1st to March 31st) in which the survey work was first comissioned. Status - Flag to indicate whether the survey has been completed (Surveyed) or is planned for the future (Planned) Area_KmSq - The total area of the polygon (in WGS UTM -3 deg)