1. A method for determining a position of a navigation device of a navigation system within a vehicle based on a plurality of positioning procedures, the method comprising the steps of: receiving a positioning information signal from a positioning information source; determining an approximate position of the navigation device based on the received positioning information signal, the approximate position being located within a routing area comprising a plurality of geographical areas, where one of the plurality of geographical areas comprises a default geographical area positioned outside of the others of the plurality of geographical areas; determining the geographical area in which the navigation device is located based on the approximate position of the navigation device; selecting one of the plurality of positioning procedures based on the determined geographical area, each positioning procedure associated with one of a plurality of predefined parameter sets; and determining the position of the navigation device within the vehicle according to the selected positioning procedure and the associated predefined parameter set, the associated predefined parameter set comprising road information corresponding to a road on which the vehicle is driving within the determined geographical area.