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    • 7. 发明授权
    • Vehicle navigation system providing for determination of a point on the border of a map stored in memory on the basis of a destination remote from the area covered by the map
    • 车辆导航系统,用于根据远离地图覆盖区域的目的地确定存储在存储器中的地图边界上的一个点
    • US06169956A
    • 2001-01-02
    • US09032026
    • 1998-02-27
    • Kyomi MorimotoTakaharu FukayaSatoshi OgawaPeter CoenenOle Diels
    • Kyomi MorimotoTakaharu FukayaSatoshi OgawaPeter CoenenOle Diels
    • G01C2134
    • G08G1/096827G01C21/34G08G1/096861G08G1/096866G08G1/096872G09B29/106
    • A vehicle navigation system includes a present position detector, an input device for inputting information required for route searching, inclusive of information identifying a starting point and a destination, an output device for outputting route guidance, an information memory containing map data for route guidance within a geographical area, and border line data for a border line defining a perimeter for the geographical area. A central processing unit determines whether or not the detected present position or starting point and the destination are within the geographical area stored in the information memory, determines a crossing point on the border line responsive to a determination that the present position or the starting point and the destination are not both in the geographical area and determines a travel route from the present position or starting point to the destination, which travel route passes through the crossing point. The information memory may be an element additionally containing data identifying locations outside of the geographical area in the form of remote location data which is correlated with respective border points. This system allows the user to be guided to a proper border crossing point even when the destination is outside of the geographical area covered by the map data stored in the information memory element, e.g. a CD-ROM.
    • 车辆导航系统包括:当前位置检测器,用于输入路线搜索所需的信息的输入装置,包括识别起点和目的地的信息,输出路线引导的输出装置,包含用于路线引导的地图数据的信息存储器 一个地理区域,以及界定地理区域周界的边界线的边界线数据。 中央处理单元确定检测到的当前位置或起始点和目的地是否在存储在信息存储器中的地理区域内,响应于确定当前位置或起始点和 目的地不在地理区域中,并且确定从当前位置或起点到目的地的行进路线,该行驶路线经过交叉点。 信息存储器可以是另外包含以与各个边界点相关联的远程位置数据的形式识别位于地理区域之外的位置的数据的元件。 即使当目的地在存储在信息存储元件中的地图数据覆盖的地理区域之外时,该系统也允许用户被引导到适当的边界交叉点。 一张CD-ROM。