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Track: Database Design and Automation
Michael Rink
NOAA Coastal Services Center (CSC)
2234 S Hobson Avenue
Charleston, SC 29405
Telephone: 803-974-6295
Fax: 803-974-6232
E-mail: mrink@csc.noaa.gov
Using ArcScan to Vectorize National Oceanic and Atmospheric Administration (NOAA) Raster Shoreline Maps of North Carolina, South Carolina, and Georgia
Defining Issue: In creating an ocean planning Geographic Information System (GIS database), the need for highly detailed shoreline data is imperative. NOAA shoreline charts at 1:10,000 scale or better can deliver the accuracy necessary for localized planning. GIS Solution: The NOAA CSC has developed a partnership with the Charleston area AmeriCorps office to convert raster ride-controlled photography by-products to a high-resolution vector shoreline. Methodology: During construction of the NOAA paper nautical charts, high-resolution shoreline is collected from tide-controlled photography. This product (called a T-sheet) has historically only been produced in a paper format and is only available as a raster archive. Under the direction of CSC GIS personnel, the AmeriCorps volunteers will identify and use ArcScan to vectorize the shoreline. Each volunteer is responsible for the completion of at least eight maps over a two-month period. The end product will be a complete coverage of over 150 individual
shoreline charts for the three-state area at 1:10,000 scale or better. Software: The work will be conducted on IBM-compatible PCs using the X-terminal emulator eXceed to connect to a Sun workstation running ArcScan and ARCEDIT. The purpose of the paper is to discuss the methods used to create a high-resolution vector shoreline coverage suitable for use in coastal resource management by using AmeriCorps volunteers with no experience in GIS.
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