- 
    
      Minnesota Scanned Topographic Map ServiceThe Minnesota Geospatial Image Service provides versatile access to the USGS Topographic Map Series layers (DRG format) using a Web Map Service (WMS). Using this service...
      
      
        
        
        
          E' possibile inoltre accedere al registro usando le API (vedi Documentazione API). 
      
      
    
  