Class Hierarchy

mindmap
	root((Emitpy))
		Airport
		  Ramps
		  Taxiways
		  Service roads
		  Service points
		      Parkings
		      Destinations
		      Depots
		Airspace
		  Terminals
		  Fixes
		      Navaids
		      Waypoints
		  CIFP
		      SID
		      STAR
		      APPCH
		      RWY
		  Airways
		      High
		      Low