Abstract: Provided is an apparatus and method for switching a navigation mode between a vehicle navigation mode and a personal navigation mode in a navigation device supporting vehicle navigation and personal navigation. Switching between the vehicle navigation mode and the personal navigation mode is performed according to whether the navigation device is mounted in a navigation device holder, whether a GPS speed provided by a GPS receiver is higher than a predetermined speed, and whether a step is detected using an output of an accelerometer. Since mode switching between the vehicle navigation mode and the personal navigation mode is automatically performed, a user does not need to manually perform mode switching.

Abstract: A navigation system including a map data server and a navigation terminal. The map data server stores map data produced for the map information of a specific region. When an external manager modifies the map data, the server produces and transmits map modification command information corresponding to the modified map data. The navigation terminal stores map data corresponding to the map data stored in the map data server, receives and analyzes the map modification command information, and modifies the previously stored map data according to the analyzed result. Therefore, map data can be updated using the small amount of map modification command data.