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1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, and 2008. Environmental Systems Research Institute (Redlands, Calif.) and United States. Bureau of Transportation Statistics. This line shapefile represents rural and urban interstate highways. U.S. National Transportation Atlas Interstate Highways is part of the National ... Environmental Systems Research Institute (Redlands, Calif.).
2003. Napa County Conservation, Development Planning. Napa County Viewshed Roads per the Viewshed Protection Ordinance. Napa County (Calif.). County Of Napa.