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2014. National Atlas of the United States. This line shapefile includes Global Map data showing the counties and equivalent entities of the United States, Puerto Rico, and the U.S. Virgin Is... National Atlas of the United States.
2014. National Atlas of the United States. This line shapefile includes Global Map data showing railroads in the conterminous United States and Alaska. The data are a modified version of the... National Atlas of the United States.
2014. National Atlas of the United States. This line shapefile includes Global Map data showing streams in the United States, Puerto Rico, and the U.S. Virgin Islands. The data are a modifie... National Atlas of the United States.
2012. Miller, David, John A. Volpe National Transportation Systems Center (U.S.), and United States. Bureau of Transportation Statistics. This polyline shapefile depicts FMCSA Hazardous Material Routes that were developed using the 2004 First Edition Topologically Integrated Geographi... United States. Bureau of Transportation Statistics.
2011. United States. Federal Highway Administration. Office of Highway Policy Information and United States. Bureau of Transportation Statistics. The Federal Highway Administration (FHWA) has the responsibility to assure that adequate highway transportation information is available to support... United States. Bureau of Transportation Statistics.
2011. United States. Bureau of Transportation Statistics and United States. Federal Highway Administration. This polyline shapefile depicts the National Highway Planning Network, a comprehensive network database of the United States' major highway system.... United States. Bureau of Transportation Statistics.
2011. United States. Bureau of the Census. Geography Division and United States. Bureau of Transportation Statistics. This polyline shapefile depicts hydro coverages that were created using TIGER/Line 2000 shapefile data gathered from ESRI's Geography Network. The ... United States. Bureau of Transportation Statistics.
2010. National Geophysical Data Center. This map layer shows isogonic lines (lines of constant declination of the Earth's magnetic field), derived from the International Geomagnetic Refer... National Atlas of the United States.
2010. National Geophysical Data Center. This line shapefile shows lines of equal horizontal intensity of the Earth's magnetic field, derived from the International Geomagnetic Reference F... National Atlas of the United States.
2010. National Geophysical Data Center. This shapefile shows isoclinic lines (lines of constant inclination of the Earth's magnetic field), derived from the International Geomagnetic Refe... National Atlas of the United States.