Patent ID: 8200432
Filing Date: 2012-06-12
Classification: G01C

Abstract:
1. A route guidance system configured from a first route search server, said route guidance system comprising: a map database that has a predetermined area as a serviceable area and that stores map data of the area; a route search network database for storing road network data and transportation network data of the area; and a terminal connected to said first route search server via a network; wherein the first route search server has a candidate connection extractor for extracting point information of at least one candidate connection enabling arriving at a different area outside of the serviceable area, and a route searcher for searching for an optimum route as a candidate route between a departure place or a destination and the candidate connection; in a case in which a route search request is received from said terminal such that a point inside said serviceable area is the departure place and a point inside the different area outside of said serviceable area is the destination, said first route search server searches for an optimum candidate route from the departure place to said candidate connection, transmits point information of said destination and point information of said candidate connection to a second route search server constituting a second route guidance system whose serviceable area is said different area, and requests that the second route search server search for an optimum candidate route from said candidate connection to the destination; and said second route search server provides said first route search server with link data of said candidate route leading to said destination; either said first route search server or said second route search server has a candidate route combiner for combining required times of said respective searched candidate routes on the basis of said candidate connection, and a recommended route determiner for designating as a recommended route the candidate route having the shortest required time on the basis of the required times of the candidate routes combined by said candidate route combiner; and said first route search server transmits to said terminal the data of the recommended route from the departure place to the destination, including the link data of the candidate route provided from said second route search server, on the basis of the recommended route determined by said recommended route determiner.