1995. Bureau of Transportation Statistics, (comp.). National Transportation Analysis Regions (NTAR) divide the U.S. into 89 areas that delineate the functional geography transportation demand. Bureau of Transportation Statistics.
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1994. Vanderbilt Engineering Center for Transportation Operations and Research, Vanderbilt University. 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.
1994. Vanderbilt Engineering Center for Transportation Operations and Research, Vanderbilt University. 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.
1956. George Philip & Son, Ltd. North Decimal Degree 90.000000. South Decimal Degree -90.0000. East Decimal Degree 180.0000. West Decimal Degree -160.000... London, UK : [s.n.], 1956.
2016. Hart Energy Publishing. This point shapefile represents ports in the United States, Mexico, and Canada. Data includes official port name, entry restrictions, associated U.... Hart Energy Publishing.
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.
1995. Bureau of Transportation Statistics, (comp.). The Public-Use Airports database is a geographic point database of aircraft landing facilities in the United States and U.S. Territories. Attribute... Bureau of Transportation Statistics.
2004. Instituto Nacional de Estadística, Geografía e Informática (Mexico), Geological Survey (U.S.), and Canada Centre for Remote Sensing. This line shapefile represents roads in North America at 1:1,000,000 scale. The roads included in this layer are either those that connect major ce... Geological Survey (U.S.).
2016. Hart Energy Publishing. This line shapefile represents roads in North America (Canada, Mexico, and the United States). This layer is from Winter Quarter 2016. This layer i... Hart Energy Publishing.
1951. United States. Civil Aeronautics Board. Bureau of Air Operation. North Decimal Degree 80.000000. South Decimal Degree -80.000000. East Decimal Degr... [Washington, D.C.] : [s.n.], ca. 1951.