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1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, and 2006. National Atlas of the United States. This polygon shapefile contains National Wilderness Preservation System areas of 640 acres or more, in the United States, Puerto Rico, and the U.S.... National Atlas of the United States.
2020. Nevada County (Calif.). Geographic Information Systems. Nevada Irrigation District boundaries and district ID numbers. This work is licensed under a Creative Commons Attribution 4.0 International Licens... Nevada County (Calif.). Geographic Information Systems.
2020. Nevada County (Calif.). Geographic Information Systems. This layer delineates the Nevada Joint High School District. The District is divided into the five Board of Trustee Areas. Most Trustee boundaries ... Nevada County (Calif.). Geographic Information Systems.
1971. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.
1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.
1978. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the lead (Pb) 3... United States. Bureau of Transportation Statistics.
2008. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the lead (Pb) 3... United States. Bureau of Transportation Statistics.
1971. Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the nitrogen di... United States. Bureau of Transportation Statistics.
1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the nitrogen di... United States. Bureau of Transportation Statistics.
1979. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3) ... United States. Bureau of Transportation Statistics.