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 updating a map data. The navigation device (2) acquires a differential map data containing the intersection from the map delivery server (3). Then, an update map data selection section (230) determines whether the intersection can be updated in time. An update order determination section (240) updates the differential map data which can be updated in time in ascending order of time required to reach the intersection.


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    Title :

    NAVIGATION DEVICE, NAVIGATION METHOD AND NAVIGATION SYSTEM


    Additional title:

    NAVIGATIONSGERÄT, NAVIGATIONSVERFAHREN UND NAVIGATIONSSYSTEM
    DISPOSITIF DE NAVIGATION, PROCÉDÉ DE NAVIGATION ET SYSTÈME DE NAVIGATION


    Contributors:

    Publication date :

    2016-10-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01C Messen von Entfernungen, Höhen, Neigungen oder Richtungen , MEASURING DISTANCES, LEVELS OR BEARINGS / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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