1786. Rumsey, David, 1944- and Pownall, Thomas. This layer is a georeferenced image of a map of North America orignally created by T. Pownall in 1786. The original map appears in "A general atlas... Cartography Associates.
    
  
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      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a point coverage representing aeronautical facilities located throughout DCW (Digital Chart of the World) geographic coverage as ... National Imagery and Mapping Agency.
    
  
    
      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a polyline coverage representing cultural landmarks located throughout DCW (Digital Chart of the World) geographic coverage as of... National Imagery and Mapping Agency.
    
  
    
      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a point coverage representing a wide variety of cultural landmark features located throughout DCW (Digital Chart of the World) ge... National Imagery and Mapping Agency.
    
  
    
      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a polygon coverage representing a wide variety of cultural landmark features located throughout DCW (Digital Chart of the World) ... National Imagery and Mapping Agency.
    
  
    
      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a polyline coverage representing data quality features throughout DCW (Digital Chart of the World) geographic coverage as of 1992... National Imagery and Mapping Agency.
    
  
    
      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a polygon coverage representing data quality features throughout DCW (Digital Chart of the World) geographic coverage as of 1992.... National Imagery and Mapping Agency.
    
  
    
      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a line coverage representing varous drainage feature types located throughout DCW (Digital Chart of the World) geographic coverag... National Imagery and Mapping Agency.
    
  
    
      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a point coverage representing hydrographic drainage features located throughout DCW (Digital Chart of the World) geographic cover... National Imagery and Mapping Agency.
    
  
    
      1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a polygon coverage representing drainage features located throughout DCW (Digital Chart of the World) geographic coverage as of 1... National Imagery and Mapping Agency.