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Location of navigation channels, port infrastructure, precautionary, pilot, and depth areas and contour lines are from large scale RNC.kap files, NOAA_RNC MapService, and ENC Direct to GIS.Delineation boundaries include port infrastructure with an inland buffer of 500 meters for ports that have less than 10,000,000 tons of total mass cargo transported through the port per year and an inland buffer of 1000 meters for ports with greater than 10,000,000 tons of total mass cargo transported through the port per year.3. AIS data points found in http://www.marinecadastre.gov/ (which passage has the highest traffic for the most vessels) from May 2010 in UTM zones 15, 16, 17, and 18.4. Coast Pilot (Textual description of each port and its features)5. 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