| 摘要 |
<p>A navigation terminal (2) loaded in a vehicle (1) is provided with a wireless communication device (18) connectable to a movable communications network (3) and a present position detection device (13) and instructs implementation of a predetermined navigation function. The gateway apparatus (4) connects the movable communications network (3) and the Internet (5) and implements protocol conversion and charging processing. A navigation server (6) acquires positional data of the vehicle (1) from the navigation terminal (2) via the Internet (5), discriminates map data to be a distribution object to the navigation terminal (2), and generates navigation information based on the instructed navigation function to provide it to the navigation terminal (2). A map search server (7) reads map data discriminated as the distribution object from a map data base (8) accumulating map data and distributes them to the navigation terminal (2) via the Internet (5).</p> |
