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Coastal Map
Official updated NOAA Raster Navigational Charts are available for free download here.
The Coastal Map Data Layer for Geographic Information Systems (GIS) Project began with the purpose to create a digital georeferenced data layer in order to provide the coastal stewardship community and general public with non-proprietary nautical chart images for GIS derived products. Coastal maps are produced from NOS nautical charts for all near-shore geographic areas of the United States.
The nautical chart contains information critical to navigational users, yet obstructs a clear view of the topographic and hydrographic data. The charts are therefore cleaned of all navigational aides and symbols, then prepared as TIFFs (Tag(ged) Image File Format) in local Mercator projection. Federal Geographic Data Committee (FGDC) compliant metadata is available online.
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| Coastal Map | Nautical Chart | Vector Shoreline |
Vector Shoreline
Official updated Mean High Water Shoreline from NOAA Electronic Navigational Charts are available for download here.
The main purpose of the Vector Shoreline Project is to provide public access to recently charted coastline data. The project is targeted at map scales between 1:10,000 and 1:80,000 with emphasis on high spatial resolution. The derived Mean High Water and Mean Lower Low Water lines were originally processed from binary raster files that were concurrently used in NOAA nautical chart production, though the derived outlines may not always correspond to these well-defined shoreline datums. The derived shorelines are referenced to geographic coordinates and imported to the ESRI shapefile format that is used in many GIS applications. As derived from the raster nautical charts, the Mean High Water line and the Mean Lower Low Water line are respectively represented by files with "gd20" and "mar" in the name; for example, "1276gd20.shp" and "1276mar.shp". FGDC compliant metadata for the Vector Shoreline series is available online.
Merged Vector Shoreline
Created from the Vector Shoreline series, Merged Vector Shoreline is a topologically
clean Mean High Water line that has been derived and merged from NOAA Charts
published at the best scale for the conterminous U.S., Hawaii, Alaska, and U.S. territories.
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Revised Monday January 28 2008by OCS Webmaster