NOAA/NOS and USCGS Seabed Descriptions from Hydrographic Surveys

The NOAA/NOS and USCGS Seabed Descriptions from Hydrographic Surveys database is a compilation of surficial sediment composition from multiple sources for over 200,000 seafloor sediment samples primarily around U.S. coastal areas. The descriptions were abstracted from unpublished data reports and Bottom Type "M" log sheets, and digitized from survey smooth sheets produced by the NOAA National Ocean Service (NOS) and its predecessor, the U.S. Coast and Geodetic Survey (USCGS). Prior to August 2001, many physical sediment samples were routinely sent to the Smithsonian Institution Museum of Natural History (NMNH) for archive with accompanying "M" log forms from which bottom type and other information were coded into the NMNH sediment database. In 2001, NMNH sent a copy of the database to NOAA's National Geophysical Data Center (now part of the National Centers for Environmental Information) to be incorporated into the Index to Marine and Lacustrine Geological Samples database, and for distribution to data users needing access to the bottom type information in the files. With support from NOS, NGDC digitized several thousand additional bottom type observations from historic NOS Hydrographic Survey smooth sheets and added them to the database. NOS is coding thousands more bottom type observations for entry into the database from survey Data Reports, or DRs. In 2011, NOS began adding standardized digital bottom type descriptions to the database using the International Hydrographic Organization (IHO) SF57 standard "NATSUR" (nature of surface) and "NATQUA" (nature of surface qualifier) coding scheme, transferring the data to NCEI in KML form for archive and upload to the geospatially-enabled database. Hydrographic Technical Directive (HTD)2011-6 contains the official new directive. Data are free for online search and download.

Data and Resources

Additional Info

Field Value
Last Updated June 10, 2017, 18:13
Created June 10, 2017, 18:13
access_constraints ["Cite as: National Ocean Service (2013): NOAA/NOS and USCGS Seabed Descriptions from Hydrographic Surveys. NOAA National Centers for Environmental Information. doi:10.7289/V5BG2KWG [date of access]", "Data are not to be used for navigation.", "The locations and descriptions for some surveys in this dataset that were digitized from smooth sheets are not the original values entered shipboard, they are approximations and are interpretations of the digitizer.", "Access to this dataset is unrestricted.", "While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty."]
bbox-east-long -64.43167
bbox-north-lat 72.609314
bbox-south-lat 14.27444
bbox-west-long -175.34972
contact-email geology.info@noaa.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2013-11-21"}, {"type": "revision", "value": "2013-11-21"}]
frequency-of-update irregular
graphic-preview-description NOS sediment sampling locations in the database
graphic-preview-file https://www.ngdc.noaa.gov/mgg/image/nosseds320x235.jpg
graphic-preview-type JPEG
guid gov.noaa.ngdc.mgg.geology:G10163
licence ["Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States."]
metadata-date 2015-12-31
metadata-language eng: USA
progress ongoing
resource-type dataset
responsible-party [{"name": "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-175.34972, 14.27444], [-64.43167, 14.27444], [-64.43167, 72.609314], [-175.34972, 72.609314], [-175.34972, 14.27444]]]}
spatial-data-service-type ArcGIS Map Service
spatial-reference-system urn:ogc:def:crs:EPSG:4326
spatial_harvester true
temporal-extent-begin 1837-01-01
temporal-extent-end 2013-11-21