2005. EROS Data Center. The grayscale North America shaded relief data were derived from the GTOPO30 elevation data. GTOPO30 is a global digital elevation model (DEM) with... National Atlas of the United States.
    
  
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      2011. National Atlas of the United States. This polygon shapefile portrays the hazardous waste generated, shipped, and received by state and other areas within the United States, Puerto Rico... National Atlas of the United States.
    
  
    
      1981. United States. Soil Conservation Service. Shows land use.; "Base map prepared by the Geological Survey in cooperation with the Soil Conservation Service." Includes vicinity map.; On verso: ... The Service (Columbia, S.C.).
    
  
    
      1981. United States. Soil Conservation Service. Shows land use.; Includes vicinity map.; On verso: text.; "January 1981 base 4-R-36707." 46 x 56 centimeters. The Service (Columbia, S.C.).
    
  
    
      1981. United States. Soil Conservation Service. Shows land use.; "Base map prepared by the Geological Survey in cooperation with the Soil Conservation Service."; Includes vicinity map.; Text on v... The Service (Columbia, S.C.).
    
  
    
      1981. United States. Soil Conservation Service. Shows land use.; Includes vicinity map.; Text on verso.; "March 1980 base 4-R-37399." 89 x 69 centimeters Scale 1:100,000. The Service (Columbia, S.C.).
    
  
    
      1981. United States. Soil Conservation Service. Shows land use.; Includes vicinity map.; On verso: text.; "May 1981 base 4-R-37628." 48 x 48 centimeters Scale 1:100,000. The Service (Columbia, S.C.).
    
  
    
      1980. United States. Soil Conservation Service. Shows land use.; "Base map prepared by the Geological Survey in cooperation with the Soil Conservation Service."; Includes vicinity map.; On verso:... The Service (Columbia, S.C.).
    
  
    
      1980. United States. Soil Conservation Service. Shows land use.; "Base map prepared by the Geological Survey in cooperation with the Soil Conservation Service."; Includes vicinity map. 71 x 51 ce... USDA-SCS (Fort Worth, Tex.).
    
  
    
      1980. United States. Soil Conservation Service. Shows land use.; Includes vicinity map.; On verso: text.; "July 1980 base 4-R-37462." 71 x 56 centimeters. The Service (Columbia, S.C.).