Route guidance apparatus and method

Details Route guidance apparatus and method Route guidance apparatus and method

2005-08-23

2005-08-23

Beaulieu, Yonel (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S201000, C701S211000

Reexamination Certificate

active

06934627

ABSTRACT:
When a moving body (e.g., a car) is entering a roundabout, a navigation machine extracts link data of the roundabout from road map data. The navigation machine detects a route entering the roundabout (i.e., a route the moving body is currently taking), a center of the roundabout, and an exiting route based on the link data to determine an angle of the exiting route with respect to the entering route. A direction mark having the exiting route angle is prepared as a heading direction guidance image. The navigation machine can show an appropriate route (direction) at the roundabout without increasing the amount of stored image data.

REFERENCES:
patent: 5654892 (1997-08-01), Fujii et al.
patent: 6108604 (2000-08-01), Fukaya et al.
patent: 6151552 (2000-11-01), Koizumi et al.
patent: 0 877 348 (1998-11-01), None
patent: 0 877 348 (1998-11-01), None

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