A system for providing a travel guide transmits place information indicating a place to a computer in response to a travel guide being requested for the place. The system receives from the computer visit time information about the place generated based on ...

The device has a map storing unit and a control information storing unit to store information associated with the map information received by a communication unit (12). An information center (20) transmits latest control information to the device in respon...

A communication navigation system is provided with a communication center apparatus (3x) and a communication terminal apparatus (5x, 5y) (5x, 5y) for transmitting/receiving information via a communication network (1x). The communication center apparatus in...

A navigation system with decryption functions. The navigation system may receive from a portable data storage medium an encrypted authentication key, an encrypted first portion of a geographic database, and an unencrypted second portion of the geographic d...

A map and other information distribution system for distributing map information and information other than map information is disclosed. The map and other information distribution system comprises an information center including a database storing map inf...

A hybrid recording medium includes a read-only area in which a file is previously recorded, and a write area capable of updating and recording the file, characterized in that volume configuration information 21 and VTOC 22 about a file system are recorded ...

A data architecture for a motor vehicle that continuously provides updated data about paths along roads onto which the motor vehicle can travel from a current position of the motor vehicle as the motor vehicle travels along the roads. The data architecture...