| 摘要 |
According to a navigation apparatus of the present invention, controlling means performs map-matching in which the present position detected by the position detecting means is checked against a road on a map. When a road on which the present position lies is found, the controlling means causes the display means to display a name of the road. When a road on which the present position lies is not found, the controlling means causes the display means to display the area information indicative of the present position. The controlling means performs map-matching in which the present position detected by the position detecting means is checked against a road in a map. When the map-matching fails to find a name of the road corresponding to the present position, the controlling means causes the display means to display the area information. When the external power supply detecting means determines that electric power is being supplied from the external power source, the controlling means performs the map-matching. When said external power supply detecting means determines that electric power is not being supplied from the external power source, the controlling means does not perform the map-matching. <IMAGE> |
