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United States. Bureau of Transportation Statistics
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Shapefile
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oceans
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transportation
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1. United States Major Ports, 2013
2013. United States. Bureau of Transportation Statistics. The ports are politically defined by port limits or Corps projects, excluding non-Corps projects not authorized for publication. The determination ... Research and Innovative Technology Administration/Bureau of Transportation Statistics.
2. United States Hydrographic Lines, 2013
2011. United States. Bureau of Transportation Statistics and United States. Bureau of the Census. The hydro polygon/arc coverages were created using TIGER/LINE 2000 shapefile data gathered from ESRI's Geography Network. The individual county hyd...