| 摘要 |
PROBLEM TO BE SOLVED: To provide a route searching device which is shortened in searching time as a whole by making second searching time shorter than first searching time. SOLUTION: This route searching device is provided with a first searching means 1001 which searches a minimum-cost route along which the parameter accompanying the route becomes the minimum among the parameters accompanying the routes from a starting point to a destination, a weighting means 1006 which weights the parameter of each road section constituting the first shortest route, and an area limiting means 1007a which finds a specific map area as a limited area based on the calculated data of the first searching means 1001. This device is also provided with a second searching means 1007 which searches a route only in the limited area found by means of the area limiting means 1007a by regarding the area as an object to be searched. The second searching time of this device is shortened by limiting the searching extent by utilizing the information obtained at the first searching time. COPYRIGHT: (C)2004,JPO |
