CEFAS0c33c81e-43d1-4b57-9740-8d2d6833c15b English dataset Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk pointOfContact 2025-09-23T01:26:46 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Predictor variables and groundtruth samples for north-west European continental shelf quantitative sediment analysis 2019-04-11 publication 2025-09-23 revision 2019-04-09 creation CEFAS19766 https://data.cefas.co.uk Input data used to model sediment grain size for the north-west European continental shelf. Data includes: Sediment groundtruth observations with measured fractions of mud, sand and gravel, also converted to two additive log-ratios. These total 45761 samples. Also included are the eight predictor variables that were used to model sediment grain size. These were: Bathymetry, Bathymetric position index at a 50-pixel radii, Bathymetric position index at a 434-pixel radii, Distance from coast, Current speed at the seabed, Wave peak orbital velocity at the seabed, and suspended inorganic particulate matter for summer and winter as two separate variables. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk originator Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk custodian Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk distributor European Commission info@publications.europa.eu owner notPlanned Bathymetry and Elevation Sediment grain size parameters SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Currents Waves Suspended particulate material SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Sediment GEMET, version 1.0 2008-06-01 publication Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Sediment Water column SeaVoX Vertical Co-ordinate Coverages 2010-05-18 revision Marine Environmental Data and Information Network MEDIN metadata record availability 2012-01-11 publication data.gov.uk MEDIN metadata record availability 2012-01-11 publication otherRestrictions noLimitations otherRestrictions Public data - no limitations to reuse English environment -13.00 11.00 48.00 63.00 1990-01-01 2019-01-01 Binary Unknown https://data.cefas.co.uk/view/19766 Cefas Data Portal download The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: Binary download. dataset INSPIRE Data Specification on Habitats and Biotopes – Technical Guidelines 2013-12-10 publication false See the referenced specification Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication true See the referenced specification Groundtruth observations were downloaded from a number of European government agencies and academic literature. A thorough filtering of samples was performed to delete samples collected prior to 1990 and samples where rounded sediment fractions were recorded (suggesting the values had been estimated and not quantitatively measured). Where sediment samples were located within the same pixel the mean of the sediment fractions was also calculated to produce an average value representative of that pixel. Predictor variables were downloaded from various sources. Bathymetry data and associated derivatives were downloaded from EMODnet bathymetry ( `https://emodnet.ec.europa.eu/en/bathymetry`_). Current speed and Orbital velocity of waves at the seafloor were modelled by Cefas staff. Suspended inorganic particulate matter layers were derived from data downloaded from Copernicus online portal (`http://marine.copernicus.eu/`_). .. _`https://emodnet.ec.europa.eu/en/bathymetry`: https://emodnet.ec.europa.eu/en/bathymetry .. _`http://marine.copernicus.eu/`: http://marine.copernicus.eu/ MEDIN 3.1.1