ffcb3444-dd78-11eb-9b1a-0242c0a82008 eng utf8 dataset Seascape Belgium Marine Data & GIS Specialist Oostende 8400 BEL tim.collart@seascapebelgium.be pointOfContact Seascape Belgium Marine Data & GIS Specialist Oostende 8400 BEL tim.collart@seascapebelgium.be author 2022-02-22T14:48:44Z ISO 19115:2003 - Geographic information - Metadata ISO 19115:2003 4326 EPSG 6.11 geonode:Guyots Guyot geomorphic feature layer 2014-02-05T00:00:00Z publication mapDigital The guyot geomorphic feature layer represents the spatial extent of the guyots 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). Guyots are “an isolated (or group of) seamount (s) having a comparatively smooth flat top. Also called tablemount(s)” (IHO, 2008). In this study the seamount base layer was used to mask the SRTM30_PLUS model. The gradient of the resulting grid was calculated (ArcGIS 10->DEM Surface Tools (Jenness 2012)->Slope, Slope computation method = 4-cell method). The gradient was classified into areas >2 degrees and areas <2 degrees. The areas less than two degrees were converted into vector layers. Where these occurred at the top of seamounts and were greater than a minimum size threshold (10 km2) they were flagged as possible guyots. These possible guyots were then visually checked and either classified as a guyot or a seamount. Additionally the remaining seamounts were visually checked to see whether any with flat tops had been missed in the classification process. The geomorphic features map of Agapova et al (1979) was used in addition to the GEBCO Gazetteer of geographic names of undersea features (IHO-IOC, 2012), to ensure all previously mapped features were assessed for inclusion in our map. The guyot geomorphic feature layer represents the spatial extent of the guyots 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). The global seafloor geomorphic features map is intended to support ocean management including feature inventories, spatial planning and biodiversity conservation. completed jesse.cleary@duke.edu originator http://www.geonode.iatlantic.eu/uploaded/thumbs/layer-ffcb3444-dd78-11eb-9b1a-0242c0a82008-thumb.png Thumbnail for 'Guyot geomorphic feature layer' image/png ESRI Shapefile 1.0 Downloadable Data features Guyots seafloor, geomorphic features, habitats theme Global place license Creative Commons Attribution 4.0 International (CC BY 4.0): This is a human-readable summary of (and not a substitute for) the license. Disclaimer. You are free to: Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially. This license is acceptable for Free Cultural Works. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits. Notices: You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation. No warranties are given. 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(https://creativecommons.org/licenses/by/4.0/) no limitations on public access eng utf8 oceans -179.947219849 178.557327271 -69.0158538818 57.6414718628 No information provided https://www.geonode.iatlantic.eu WWW:LINK-1.0-http--link Online link to the 'Guyot geomorphic feature layer' description on GeoNode http://www.geonode.iatlantic.eu/uploaded/thumbs/layer-ffcb3444-dd78-11eb-9b1a-0242c0a82008-thumb.png WWW:DOWNLOAD-1.0-http--download .png Guyot geomorphic feature layer (Thumbnail Format) http://www.geonode.iatlantic.eu/geoserver/ows?layers=geonode:Guyots&crs=EPSG:4326&service=WMS&format=image/png8&access_token=uz5AggFg6sUvuYFlVSvVlqi3la0u2t&request=GetMap&height=180&width=240&version=1.1.1&bbox=-179.947219848633000,-69.015853881835900,178.557327270508000,57.641471862793000 WWW:DOWNLOAD-1.0-http--download .png Guyot geomorphic feature layer (Remote Thumbnail Format) http://www.geonode.iatlantic.eu/geoserver/ows?service=WMS&request=GetLegendGraphic&format=image/png&WIDTH=20&HEIGHT=20&LAYER=geonode:Guyots&STYLE=Guyots&legend_options=fontAntiAliasing:true;fontSize:12;forceLabels:on WWW:DOWNLOAD-1.0-http--download .png Guyot geomorphic feature layer (Legend Format) http://www.geonode.iatlantic.eu/geoserver/ows?outputFormat=gml2&service=WFS&srs=EPSG%3A4326&request=GetFeature&typename=geonode%3AGuyots&version=1.0.0 WWW:DOWNLOAD-1.0-http--download .gml Guyot geomorphic feature layer (GML 2.0 Format) http://www.geonode.iatlantic.eu/geoserver/ows?outputFormat=SHAPE-ZIP&service=WFS&srs=EPSG%3A4326&request=GetFeature&format_options=charset%3AUTF-8&typename=geonode%3AGuyots&version=1.0.0 WWW:DOWNLOAD-1.0-http--download .zip Guyot geomorphic feature layer (Zipped Shapefile Format) http://www.geonode.iatlantic.eu/geoserver/ows?srsName=EPSG%3A4326&outputFormat=json&service=WFS&srs=EPSG%3A4326&request=GetFeature&typename=geonode%3AGuyots&version=1.0.0 WWW:DOWNLOAD-1.0-http--download .json Guyot geomorphic feature layer (GeoJSON Format) http://www.geonode.iatlantic.eu/geoserver/ows?outputFormat=excel&service=WFS&srs=EPSG%3A4326&request=GetFeature&typename=geonode%3AGuyots&version=1.0.0 WWW:DOWNLOAD-1.0-http--download .excel Guyot geomorphic feature layer (Excel Format) http://www.geonode.iatlantic.eu/geoserver/ows?outputFormat=csv&service=WFS&srs=EPSG%3A4326&request=GetFeature&typename=geonode%3AGuyots&version=1.0.0 WWW:DOWNLOAD-1.0-http--download .csv Guyot geomorphic feature layer (CSV Format) http://www.geonode.iatlantic.eu/geoserver/ows?outputFormat=text%2Fxml%3B+subtype%3Dgml%2F3.1.1&service=WFS&srs=EPSG%3A4326&request=GetFeature&typename=geonode%3AGuyots&version=1.0.0 WWW:DOWNLOAD-1.0-http--download .gml Guyot geomorphic feature layer (GML 3.1.1 Format) http://www.geonode.iatlantic.eu/geoserver/ows?layers=geonode%3AGuyots&service=WMS&format=image%2Fpng&request=GetMap&height=550&width=550&bbox=-179.947219848633000%2C-69.015853881835900%2C178.557327270508000%2C57.641471862793000&srs=EPSG%3A4326 WWW:DOWNLOAD-1.0-http--download .png Guyot geomorphic feature layer (PNG Format) http://www.geonode.iatlantic.eu/geoserver/ows?layers=geonode%3AGuyots&service=WMS&format=application%2Fpdf&request=GetMap&height=550&width=550&bbox=-179.947219848633000%2C-69.015853881835900%2C178.557327270508000%2C57.641471862793000&srs=EPSG%3A4326 WWW:DOWNLOAD-1.0-http--download .pdf Guyot geomorphic feature layer (PDF Format) http://www.geonode.iatlantic.eu/geoserver/ows?layers=geonode%3AGuyots&service=WMS&format=image%2Fjpeg&request=GetMap&height=550&width=550&bbox=-179.947219848633000%2C-69.015853881835900%2C178.557327270508000%2C57.641471862793000&srs=EPSG%3A4326 WWW:DOWNLOAD-1.0-http--download .jpg Guyot geomorphic feature layer (JPEG Format) http://www.geonode.iatlantic.eu/download/275 WWW:DOWNLOAD-1.0-http--download .zip Guyot geomorphic feature layer (Original Dataset Format) http://www.geonode.iatlantic.eu/geoserver/ows OGC:WFS geonode:Guyots Service - Provides Layer: Guyot geomorphic feature layer http://www.geonode.iatlantic.eu/geoserver/ows OGC:WMS geonode:Guyots Service - Provides Layer: Guyot geomorphic feature layer dataset