Map data storage device, map data updating method, and computer program

    公开(公告)号:US09869558B2

    公开(公告)日:2018-01-16

    申请号:US14786221

    申请日:2014-05-09

    IPC分类号: G01C21/32

    CPC分类号: G01C21/32

    摘要: A map data storage device, a map data updating method, and a computer program that can shorten the time required for a map data updating process. In the case where map data stored in a navigation-side local DB of a navigation apparatus are to be updated, the navigation apparatus updates the map data stored in the navigation-side local DB on the basis of map updating data received from a map distribution center, and prepares a data reference index that associates a PID (universal identification information) included in the map data with a record number (internal identification information) included in the map data on the basis of the updated map data. After that, in the case where an application is executed by the navigation apparatus, the prepared data reference index is referenced to access the map data stored in the navigation-side local DB.

    Navigation device and navigation method

    公开(公告)号:US10302437B2

    公开(公告)日:2019-05-28

    申请号:US15070701

    申请日:2016-03-15

    IPC分类号: G01C21/30 G01C21/32

    摘要: In a case where a specific position is designated in first road network data, first link group identification data containing a link, on which the specific position is present, is acquired, and a corresponding link group, which is a link group indicated by second link group identification data, corresponding to the first link group identification data, is extracted from second road network data. A corresponding position on a link contained in the corresponding link group, which corresponds to the specific position, is determined, and second information is acquired from second map data based on the corresponding position.