The shoreline was created from data captured (digitized from scanned images of the master separates of the NOS Charts) from over 270 National Ocean Service Navigation Charts and spans some 80,000 nautical miles at an average map scale of 1:70,000.
This product, created by the Strategic Environmental Assessments (SEA) Division of NOAA's Office of Ocean Resources Conservation and Assessment, comprises over 75,000 nautical miles of coastline (nearly 2.5 million vertices), representing the entire conterminous United States of America. Alaska, the Hawaiian Islands, Puerto Rico, and all other interests and territories of the United States are not included in the collection.
The data set is designed for a broad target audience ranging from governmental agencies, universities and other research institutions, to the private sector, and students, as well as any other concern requiring a general purpose digital shoreline layer for GIS and cartographic projects.
National Oceanic and Atmospheri, National Ocean Service (NOS), Office of , 1994, NOS80K: National Ocean Service Coastline of the Northeastern United States: NOAA/NOS/ORCA/SEA, Silver Spring, MD.This is part of the following larger work.
Poppe, L.J., McMullen, K.Y., Ackerman, S.D., Blackwood, D.S., Irwin, B.J., Schaer, J.D., and Forrest, M.R., 2011, Sea-Floor Geology and Character of Eastern Rhode Island Sound West of Gay Head, Massachusetts: Open-File Report 2011-1004, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
Please credit National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey, and the Strategic Environmental Assessments (SEA) Division of the Office of Ocean Resources Conservation and Assessment (ORCA) as the originator of the dataset.
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Because the ALLUS80K provides a higher detail of coastal inlets and waterways, this data layer was added to the GIS as a basemap for overlaying the surficial sediment data archived in this report. This data layer is a subset of the complete ALLUS80k coastline and shapefile and has been clipped to a portion of the east coast.
Person who carried out this activity:
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Data sources produced in this process:
Poppe, L.J., Paskevich, V.F., Williams, S.J., Hastings, M.E., Kelley, J.T., Belknap, D.F., Ward, L.G., FitzGerald, D.M., and Larsen, P.F., 2003, Surficial Sediment Data from the Gulf of Maine, Georges Bank, and Vicinity: a GIS Compilation: Open-File Report 03-001, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.
According to NOAA, the data supplied here are a compilation of information collected from some 270+ current or pre-release National Ocean Service (NOS) Navigation Charts. In compiling this product we made no attempt to ascertain the congruency between the charted data, and the real world. Our objective was to simply capture the representative coastline as provided to us via the NOS Chart. Every effort was made to capture the shoreline on these charts as faithfully as our skills and technology allowed, and there is every indication that we were successful. In doing so, however, we automatically conveyed the character (all aspects, both good and bad) of those data to our digital product. Because this character may or may not be in agreement with the real world, the user is advised to exercise caution in making any assumptions about the fallibility, or infallibility, of the spatial information supplied here; especially when circumstances warrant a high degree of absolute positional accuracy.
Spatial data were derived directly from NOS Navigation Charts, which meet or exceed National Map Accuracy standards (hard copy); the digital data supplied in this compilation should, when plotted at scale, should meet or exceed these same cartographic standards.
This data layer is a subset of the complete ALLUS80k coastline and shapefile and has been clipped to a portion of the east coast.
No additional checks for consistency were performed on this data.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- These data are not to be used for navigation purposes. Mariners should refer to the appropriate nautical chart.
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution.
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Downloadable Data: Medium Resolution Digital Vector U.S. Shoreline [OL 72 18.7 -66.5 -168]
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor the National Oceanic and Atmospheric Administration (NOAA), nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS or NOAA in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
|Data format:||The three files (nos80k.dbf, nos80k.shp, nos80k.shx) that comprise the ESRI shapefile, 'prj' and 'avl' files, browse graphic and four versions of the metadata. in format ESRI Shapefile (version ArcView 3.2) ESRI polygon shapefile Size: 8.5 mb|
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These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com. The user must have software capable of uncompressing archived zip files, such as Winzip or Pkware.
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