An apparatus for correcting distance error in a navigation syste

Details An apparatus for correcting distance error in a navigation syste An apparatus for correcting distance error in a navigation syste

1988-12-27

1990-06-26

Chin, Gary

Boots, shoes, and leggings

364457, 340990, 340995, G06F 1550

Patent

active

049377523

ABSTRACT:
In a navigation system, during navigation between guidance intersections A and B, a next named intersection C is displayed along with the distance remaining until the named intersection B is reached. After the vehicle has entered the distance error correction range, illumination color of the display of the next named intersection C is changed into, for example, red. If a corresponding portion of the display screen is touched at the time of passage though the intersection, a distance error is corrected. The invention thus makes it possible to readily correct distance errors with accuracy. Even during navigation along a straight road, distance correction can be performed at specific intersections. The invention also makes it possible to track the present position with accuracy by increasing the frequency of distance error correction.

REFERENCES:
patent: 4688176 (1987-08-01), Hirata
patent: 4774671 (1988-09-01), Itoh et al.
patent: 4792907 (1988-12-01), Ikeda et al.
patent: 4796189 (1989-01-01), Nakayama et al.
patent: 4812845 (1989-03-01), Yamada et al.
patent: 4814989 (1989-03-01), Dobereiner et al.

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