| 摘要 |
<p>Route searching (35) to the destination is performed by use of a road data (26) having each crossing data and road data and by inputting the destination to generate navigation data (27) and a course to the destination is directed while the present position is being traced (37). A course guide to the end crossing of the present position road is output by use of data on travelling guide from each crossing to the destination obtained via route searching (35) from the road network data (26). At a crossing, the present position is traced on a travelling direction road which has been recognized by a present position trace means (37) and the end crossing of that road is recognized. Recognition of a travelling direction is made at the end crossing of a road between crossings and the road in the travelling direction is used as the present position road to output a guide to the next end crossing and this procedure is repeated at each crossing up to the destination and course guiding is thus performed. In route searching, a travelling road to the destination is set for each crossing. Therefore, course guiding to the destination from the end crossing of a travelling road can be conducted by recognizing a crossing and its travelling road.</p> |
