IMPROVED NAVIGATION DEVICE AND METHOD

摘要

A method of operating a PND or navigation system is described, together with a PND or navigation system for performing such methods. The PND or navigation system includes memory storing map data consisting of base map data files, a display, GPS signal reception and processing means, such together forming a basis for navigation, route guidance, and map information display. The method is characterized by the steps of correlating the current location with said map data to derive map-specific parameters for that location and comparing said map-specific parameters with a motion-specific parameter, a vehicle-specific parameter, or the current location to determine whether the current location, motion or vehicle-related characteristic is permissible or appropriate therefor, and in the event that the current location, motion, or vehicle-related characteristic and derived map-specific parameter are seemingly at odds with one another, performing at least one secondary action. The secondary action may be the issuing of an approve/reject prompt to the user, or the automatic creation, modification or deletion of a new or pre-existing correction.