DYNAMIC NAVIGATION SYSTEM

摘要

A method for navigation includes storing map data on a server (206), the map data including vector information delineating roads (1632) in a map (1730). A portion of the vector information corresponding to an area in which a user of a mobile client device (202) is traveling is downloaded from the server to the client device. Approximate position coordinates of the user are found using a location providing device (208) associated with the client device and are corrected in the client device, using the downloaded vector information, so as to determine a location of the user on one of the roads in the map. A navigation aid is provided to the user of the client device based on the determined location.