AFSC/RACE/GAP/Prescott: Norton Sound Sediments

Description

We assembled approximately 230,000 National Ocean Service (NOS) bathymetric soundings from 39 lead-line and single-beam echosounder hydrographic surveys conducted from 1896 to 2005 in Norton Sound, Alaska. These bathymetry data are available from the National Geophysical Data Center (NGDC: http://www.ngdc.noaa.gov), which archives and distributes data that were originally collected by the NOS and others. While various bathymetry data have been downloaded previously from NGDC, compiled, and used for a variety of projects, our effort differed in that we compared and corrected the digital bathymetry by studying the original analog source documents - digital versions of the original survey maps, called smooth sheets. Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum. We incorporated 3 multibeam surveys, and added an additional 6,992 single-beam soundings from the 2010 Northern Bering Sea bottom trawl survey to fill in where smooth sheet data was lacking. We proofed and digitized 312 cartographic features, comprised mostly of rocks and islets and also digitized 4,305 verbal sediment descriptors, and digitized or adapted 2,142 km of mainland and 837 km of island shoreline.

Resources

Name Format Description Link
0 https://www.ncei.noaa.gov
57 Norton_Sound_sediments.zip http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/Norton_Sound_sediments.zip
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/24306
57 Online Resource http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/Norton_Sound_sediments.zip
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/24306.pdf
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
57 Norton_Sound_sediments.zip https://www.afsc.noaa.gov/RACE/groundfish/bathymetry/Norton_Sound_sediments.zip
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/24306
57 Online Resource https://www.afsc.noaa.gov/RACE/groundfish/bathymetry/Norton_Sound_sediments.zip
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/24306.pdf
0 https://www.ncei.noaa.gov
0 Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords

Tags

  • alaska fisheries science center
  • alaska
  • north pacific ocean
  • norton sound
  • noaa
  • point
  • u.s. department of commerce
  • national marine fisheries service
  • doc/noaa/nmfs/afsc
  • sediment
  • groundfish assessment program

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