GeoNodeFeatureCatalogue Generic Feature Catalogue Generic Feature Catalogue 1.0 2016-01-11 Organization Name pointOfContact geonode:Plateaus The plateau geomorphic feature layer represents the spatial extent of the plateaus of the worlds oceans based on interpretation of the SRTM30 plus v7 global bathymetry model. The layer is one of the 25 layers that make up the global seafloor geomorphic features map (Harris et.al. 2014). Plateaus are “flat or nearly flat elevations of considerable areal extent, dropping off abruptly on one or more sides” (IHO, 2008). Plateaus were digitised by hand based on 100 m contours. In areas where plateaus abut the margin, the foot of slope was allowed to flow offshore to encompass the plateau feature, where a clear seaward dipping gradient was apparent. In other locations marginal plateaus are distinctly separate from the continental slope and form isolated, raised platforms. The geomorphic features map of Agapova et al (1979) and the GEBCO Gazetteer of geographic names of undersea features were used to ensure all named features were included. false Plateau geomorphic feature layer fid 1 1 xsd:int the_geom 1 1 gml:MultiPolygonPropertyType Geomorphic 1 1 xsd:string area_km2 1 1 xsd:double