National Geodetic Survey's Vector Shoreline

IDENTIFICATION INFORMATION
DATA QUALITY INFORMATION
SPATIAL DATA ORGANIZATION INFORMATION
SPATIAL REFERENCE INFORMATION
ENTITY AND ATTRIBUTE INFORMATION
DISTRIBUTION INFORMATION
METADATA REFERENCE INFORMATION

These vector data represent shoreline and associated data originating from current remote sensing production. The vector data files are seamless within the surveyed project area.

In 1807, Thomas Jefferson created an organization named the Survey of the Coast "...to cause a survey to be taken of coasts of the United States, in which shall be designated the islands and shoals and places of anchorage..." The data were created by the National Ocean Service, National Geodetic Survey as part of its ongoing mission to provide base maps of the coastline. The data are made available through a web-based delivery system.

These data provide an accurate high-resolution shoreline compiled from imagery of SOUTH SHORE OF LONG ISLAND SOUND, NY This vector shoreline data is based on an office interpretation of imagery that may be suitable as a geographic information system (GIS) data layer. This metadata describes information for both the line and point shapefiles. The NGS attribution scheme 'Coastal Cartographic Object Attribute Source Table (C-COAST)' was developed to conform the attribution of various sources of shoreline data into one attribution catalog. C-COAST is not a recognized standard, but was influenced by the International Hydrographic Organization's S-57 Object-Attribute standard so the data would be more accurately translated into S-57.

The shoreline and associated data layers were originally intended to support NOAA Nautical Chart production. These datasets have been cleaned and reformatted to support the efforts of supplying accurate shoreline data layers for a coastal GIS database. These datasets may be beneficial for performing change analysis for erosion and accretion studies, land use planning, determination of boundary extent, and other types of decision making.

Metadata may be viewed and saved after a shoreline project is selected or is automatically created during the download option. Metadata includes only those features selected to be displayed on the map within the Navigator View. It is the user's responsibility to save the metadata from the displayed pop-up window.
Preview HTTP://www.ngs.noaa.gov/RSD/shoredata/NGS_Shoreline_Products.htm
Moreinfo HTTP://www.ngs.noaa.gov/RSD/shoredata/NGS_Shoreline_Products.htm

Theme_Keyword: Shoreline map
Theme_Keyword: Coastal base map
Theme_Keyword: Coastal zone map
Theme_Keyword: Shoreline
Theme_Keyword: Coastal Mapping Program
Theme_Keyword: Shoreline Mapping Program
Theme_Keyword: Shoreline data
Theme_Keyword: GC
Theme_Keyword: Geographic Cell
Theme_Keyword: NY0401
Theme_Keyword: Coast and Geodetic Survey
Theme_Keyword: Tide-controlled Photography
Theme_Keyword: GC10618

These data were generated for use by NGS during the course of its development of potential final products to fulfill its statutory mission. Although NGS is making these data available to others who may find the data of value, NGS does not warrant, endorse, or recommend the use of these data for any given purpose. The user assumes the entire risk related to the use of these data. These data are not for navigational purposes. NGS is providing these data "as is," and NGS disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will NGS be liable to you or to any third party for any direct, indirect, incidental, consequential, special, or exemplary damages or lost profits resulting from any use or misuse of these data.

U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, National Geodetic Survey, Remote Sensing Division

Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcInfo 8.1.0.415

The attribute accuracy was verified on the softcopy workstation by overlaying the vectors over the imagery and by creating checkplots of the attributed linework. The attributes were translated into NGS's Coastal Cartographic Object Attribute Source Table (C-COAST) for data consistency. The C-COAST attributes were given symbology and visually inspected to verify attribute accuracy.

All data are clipped to the neatline representing a surveyed project boundary. Line segments which did not close were snapped by the nodes to create consistently tied strings without node dangles.

The shoreline and associated data are a representation based on an office interpretation of imagery at the time of survey 20041028 to 20050321. To maintain shoreline continuity, a line with 'Shoreline/Alongshore Feature Boundary' attribution was added to the 'Shoreline' class. This feature is an artificial line that separates double-lined alongshore features from the shoreline. The 'Shoreline/Alongshore Feature Boundary' indicates to the user that a man-made alongshore feature is coincident to the shoreline in the data file. The rectangular geographic boundary limits is for data management purposes and does not infer complete surveyed coverage.

Compiled to meet 1 - 3 meters horizontal accuracy at 95% confidence level. This predicted accuracy of compiled well-defined points is a deductive estimate based on statistics of image rectification process

U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, National Geodetic Survey

NY0401

NY0401

Compilation derived from interpreted imagery

Softcopy compilation was from interpreted imagery based on standard digital photogrammetric procedures. All features were attributed during compilation. The exported shapefile attribution was translated to conform with the NGS 'Coastal Cartographic Object Attribute Source Table (C-COAST)' attribution scheme.

U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, National Geodetic Survey, Remote Sensing Division

Information relating to the field survey and compiled activities are described in the project's Descriptive Reports.

http://www.csc.noaa.gov/products/shorelines

Vector NGS Shoreline data

Not intended for navigational purposes

Web access at http://www.ngs.noaa.gov/newsys_ims/shoreline/index.cfm/