| 摘要 |
PROBLEM TO BE SOLVED: To obtain a car navigation system in which map display and course guide can be carried out even after a CD-ROM is ejected from the car navigation system. SOLUTION: Map display and course guide can be carried out even after a map information storing means 13, e.g. a map CD-ROM, storing map information including a map display data, a road matching data and a course search/ guide data is ejected from car navigation system by providing means 18 for storing a part of map information in a partial map information storing means 17 before the map information storing means 13 is separated from the car navigation system by a separating operation means 16. |
