AFSC/RACE/GAP/Prescott: Norton Sound Shoreline

Metadata Updated: February 2, 2017

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 Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum.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.

Access & Use Information

Downloads & Resources

Dates

Metadata Date May 18, 2016
Metadata Created Date May 31, 2016
Metadata Updated Date February 2, 2017
Reference Date(s) 2015 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NOAA CSW Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date May 18, 2016
Metadata Created Date May 31, 2016
Metadata Updated Date February 2, 2017
Reference Date(s) 2015 (publication)
Responsible Party (Point of Contact)
Contact Email
Access Constraints Access Constraints: These data are not to be used for navigation. | Use Constraints: These data are not to be used for navigation. We consider this smooth sheet bathymetry, feature, shoreline and sediment compilation a fairly complete first draft. The Mean High Water (MHW) shoreline was hand-digitized off of georeferenced smooth sheets in a GIS.
Bbox East Long -160.77
Bbox North Lat 65.62
Bbox South Lat 62.75
Bbox West Long -170
Coupled Resource
Frequency Of Update notPlanned
Guid gov.noaa.nmfs.inport:24305
Harvest Object Id 82ba4cc6-316c-4cbe-b515-72e3bac3bc8a
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence
Metadata Language eng
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1898
Temporal Extent End 2010

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