A navigation device (2) receives a differential map data from a map delivery server (3) via a communication line (4). The map delivery server (3) checks whether there is a new intersection on a navigation route searched by the navigation device (2) after u...

The in-vehicle information apparatus 1 according to the present invention for presenting, to a user, information which includes a returning route is composed of the following: a home position holding unit 102 for holding beforehand a position of the user's...

A communication navigation system is provided with a communication navigation terminal (5) and a communication center apparatus (3) with a communication network (1, 2) for connecting them. The communication navigation terminal is provided with a route navi...

A communication navigation system is provided with a communication center apparatus (3) and a communication terminal apparatus (4, 5), both of which transmit and receive information by two-way communication through a communication network (1, 2). The commu...

A navigation system (S) is provided that allows an appropriate destination point to be set when a vehicle begins to travel without an operator setting a destination point. A navigation system (S) is provided with a system control section (19) and, if a veh...

A server (20) in an information base (21) determines a route (server route) from a place of departure to a destination, transmitted from a client terminal (10) of a navigation unit (10) via communication, using information in a server database. On the othe...

The central data unit (5) calculates at least one alternative route (10b, 10c, 10d). This is transmitted entire or in sections, to the vehicle-based navigation system (2) An Independent claim is included for corresponding equipment.