Trench geomorphic feature layer

The trench geomorphic feature layer represents the spatial extent of the trenches 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). Trenches are ???a long narrow, characteristically very deep and asymmetrical depression of the sea floor, with relatively steep sides??? (IHO, 2008). Trenches are generally distinguished from troughs by their ???V??? shape in cross section (in contrast with flat-bottomed troughs). In this study trenches were mapped by selecting closed bathymetric contours that defined basins contained within the trench feature, and then joining the basin segments together by hand digitizing along more elevated sections. In this way, bridge features were also identified (as coinciding with infilled sections of trenches; see section on ???bridges???).

Dataset extent

Map data © OpenStreetMap contributors
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Geonetwork Links
Field Value
GN_Metadata_Show http://geonetwork.d4science.org/geonetwork/srv/en/metadata.show?uuid=geo_fea_trenches
GN_Metadata_Source http://geonetwork.d4science.org/geonetwork/srv/en/xml.metadata.get?uuid=geo_fea_trenches
GN_URL http://geonetwork.d4science.org/geonetwork
Additional Info
Field Value
access_constraints ["no limitations"]
bbox-east-long 180.0
bbox-north-lat 55.526452
bbox-south-lat -61.062679
bbox-west-long -180.0
contact-email Miles.Macmillan-Lawler@grida.no
coupled-resource
[]
dataset-reference-date
[{"type": "creation", "value": "2013-06-05"}, {"type": "publication", "value": "2014-02-14"}]
frequency-of-update irregular
GUID geo_fea_trenches
licence ["The global seafloor geomorphic feature map is available for download from bluehabitats.org"]
metadata-date 2014-02-05
metadata-language eng
point_of_contact Miles Macmillan-Lawler, Miles.Macmillan-Lawler@grida.no
resource-type dataset
responsible-party
[{"name": "GRID-Arendal", "roles": ["custodian"]}]
spatial
{"type": "Polygon", "coordinates": [[[-180.0, -61.062679], [180.0, -61.062679], [180.0, 55.526452], [-180.0, 55.526452], [-180.0, -61.062679]]]}
spatial-reference-system http://www.opengis.net/def/crs/EPSG/0/4326
spatial_harvester true
system:type Dataset
topic_category oceans
Management Info
Field Value
Author GRID-Arendal
Maintainer iMarine Catalogue Manager
Last Updated 5 April 2018, 19:26 (CEST)
Created 5 April 2018, 19:26 (CEST)