When there exists a plurality of route guiding servers designating a predetermined area as a service provision area, a terminal device (20) is capable of selecting a route guiding server suitable for processing to request. A route guiding server (30A) having received a process request from the terminal device (20) judges the area subjected to the process request and route searching servers (30B1 etc.) designating the area as a service provision area. When there exists a plurality of route guiding servers in an identical area, the route guiding server (30A) acquires detailed information relating to server-held data held by each route searching server (30B1 etc.), sets numerical values expressing ranking according to the degree of fullness, the quantity of information, and the date of the latest update of the server-held data as evaluation values, calculates the evaluation value of each route searching server (30B1 etc.) from the total of the evaluation values, and transmits server information containing the evaluation value. The terminal device (20) selects one of the route searching servers (30B1 etc.) according to the server information received from the route guiding server (30A).
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机译：当存在多个将预定区域指定为服务提供区域的路线引导服务器时，终端设备（ 20 ）能够选择适合于处理以请求的路线引导服务器。接收到来自终端设备（ 20 ）的处理请求的路线引导服务器（ 30 A）判断接受该处理请求的区域和路线搜索服务器（ 30 B 1 等）将该区域指定为服务提供区域。当在同一区域中存在多个路由向导服务器时，路由向导服务器（ 30 A）获取与每个路由搜索服务器（ 30 < / B> B 1 等），设置根据饱满程度，信息量和服务器保存数据的最新更新日期来表示排名的数值作为评估值，从评估值的总和中计算每个路径搜索服务器的评估值（ 30 B 1 等），并发送包含评估值的服务器信息。终端设备（ 20 ）根据从路由接收的服务器信息选择路由搜索服务器之一（ 30 B 1 等）引导服务器（ 30 A）。
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