{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Bradford Butman", "hasEmail": "mailto:bbutman@usgs.gov"}, "description": "The Hudson Shelf Valley is the submerged seaward extension of the ancestral Hudson River drainage system and is the largest physiographic feature on the Middle Atlantic continental shelf. The valley begins offshore of New York and New Jersey at about 30-meter (m) water depth, runs southerly and then southeasterly across the Continental Shelf, and terminates on the outer shelf at about 85-m water depth landward of the head of the Hudson Canyon. Portions of the 150-kilometer-long valley were surveyed in 1996, 1998, and 2000 using a Simrad EM1000 multibeam echosounder mounted on the Canadian Coast Guard ship Frederick G. Creed. The purpose of the multibeam echosounder surveys was to map the bathymetry and backscatter intensity of the sea floor of the valley, providing a framework for geologic, oceanographic, and geochemical studies. The data from the three surveys are combined to produce grids of bathymetry and backscatter intensity at 12-m resolution that cover the entire valley and the head of the Hudson Canyon. The mapping was done by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers with support from the Canadian Hydrographic Service and the University of New Brunswick.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F7C53J1Z", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.589a201ee4b0efcedb71a59f.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_589a201ee4b0efcedb71a59f", "keyword": ["imageryBaseMapsEarthCover", "University of New Brunswick (UNB)", "multibeam sonar", "geospatial datasets", "WHCMSC field activity 1996-043-FA", "Hudson Shelf Valley", "Hudson Canyon", "elevation", "Middle Atlantic Bight", "USGS:589a201ee4b0efcedb71a59f", "sea-floor characteristics", "Woods Hole Coastal and Marine Science Center (WHCMSC)", "marine geophysics", "North Atlantic Ocean", "Canadian Coast Guard ship Frederick G. Creed", "Coastal and Marine Geology Program (CMGP)", "oceans", "geoscientificInformation", "New York", "USGS Open-File Report 03-372", "New York Bight", "WHCMSC field activity 2000-015-FA", "sea floor mapping", "Simrad EM1000", "bathymetry", "New Jersey", "U.S. Geological Survey (USGS)", "Esri binary grid", "mid-Atlantic Bight", "WHCMSC field activity 1998-015-FA", "multibeam", "Canadian Hydrographic Service (CHS)"], "modified": "2021-11-11T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-73.901667, 39.333333, -71.999938, 40.433325", "theme": ["geospatial"], "title": "Bathymetry of the Hudson Shelf Valley (12-m resolution Esri binary grid and 32-bit GeoTIFF, Mercator, WGS 84)"}