The invention relates to an information input system for a navigation device for road vehicles, it being possible to assign to a map, in particular to a map containing a representation of streets, map markings which represent optically readable information and can be acquired by a reading device and can be fed to a data processing unit of the navigation device. A mark 6 can be assigned to a start or an end point on the map, and optically readable localisation markings 2 and 3 can be acquired by the reading device in the assigned state of the mark 6 to the start or end point. <IMAGE>
