| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigator by which the processing time can be stortened by a method in which a database device in which data used to express the position and the shape of a road and to express a connection state is provided at every different scale factor is provided and a control device is provided. SOLUTION: A map database device 8 is composed of, e.g. a CD-ROM device or the like. Data, for map display, which is composed of information regarding the shape of a road and the kind of the road and route search data which is composed of turning-point information and crossing information which are not related directly to the shape of the road are stored. When recommended- route data which is obtained by a search by means of the route search data at a first prescribed scale factor is displayed so as to be overlapped with a road map displayed on a monitor by means of the data, for map display, at a second scale factor larger than the first scale factor, a control device reads out shape data on the recommended-route data obtained by a search by means of the route search data at the first scale factor, and it displays the shape data so as to be overlapped with the road map on the monitor. |
