Patent ID: 6581004
Filing Date: 2003-06-17
Classification: G01C

Abstract:
A route navigation system which performs a route navigation for a user of a client terminal from a place of departure to a destination, comprising:a server that includes a server database and determines a server route, which is a route from the place of departure to the destination, along with guiding points using information in the server database; and the client terminal that includes a client terminal database, communicates with the server and determines a client route, which is a route from the place of departure to the destination, along with guiding points using information in the client terminal database; wherein at least one of the server and the client terminal determines identicalness, which is whether or not a route between adjoining guiding points of the server route and a route between adjoining guiding points of the client route are identical by comparing at least positions of the guiding points of the server route and positions of the guiding points of the client route, and the client terminal, according to a result of the identicalness determination, selectively uses information concerning the server route in the server database and information concerning the client route in the client terminal database in performing the route navigation.