A method for the localization of a certain route section from a first digitized map in a second digitized map. An origin root point is established with regard to a route section in the first map, and the coordinates of this origin root point are determined. Starting from the origin root point, an origin tree structure is generated from a plurality of branches. A reference root point is established in the second map in the vicinity of the coordinates of the origin root point, and in a similar way, a reference tree structure is generated, starting from the reference root point, from a plurality of branches on which tree points are situated in such a way that they correspond in each case to a point of a traffic route in the second map.