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2012. United States. Bureau of Transportation Statistics and Institute for Water Resources (U.S.). Navigation Data Center. This point shapefile depicts physical information on commercial facilities at the principal United States coastal, Great Lakes and inland ports. Th... United States. Bureau of Transportation Statistics.
2011. Vanderbilt Engineering Center for Transportation Operations and Research, United States. Bureau of Transportation Statistics, and Waterborne Commerce Statistics Center (U.S.). The National Waterway Network is comprised of a link database and a node database. Links are line strings, which consist of beginning and end point... United States. Bureau of Transportation Statistics.
2011. Vanderbilt Engineering Center for Transportation Operations and Research, Waterborne Commerce Statistics Center (U.S.), and United States. Bureau of Transportation Statistics. The National Waterway Network is comprised of a link database and a node database. Links are line strings, which consist of beginning and end point... United States. Bureau of Transportation Statistics.