2011. United States. Bureau of Transportation Statistics, United States. Department of Transportation. Research and Innovative Technology Administration, 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... U.S. Bureau of the Census (BOC).
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2013. United States. Bureau of Transportation Statistics and United States. Department of Transportation. Research and Innovative Technology Administration. The National Waterway Network is a comprehensive network database of the nation's navigable waterways. The data set covers the 48 contiguous states... U.S. Army Corps of Engineers Navigation Data Center.
2012. United States. Bureau of Transportation Statistics, United States. Department of Transportation. Research and Innovative Technology Administration, and United States. Bureau of the Census. State boundaries with political limit - boundaries extending into the ocean. The State Boundary with Detailed Shorelines database was created using... U.S. Census Bureau (BOC).
2011. United States. Bureau of Transportation Statistics, United States. Department of Transportation. Research and Innovative Technology Administration, and United States. Bureau of the Census. State boundaries with political limit - boundaries extending into the ocean. The State Boundary with Detailed Shorelines database was created using... U.S. Census Bureau (BOC).