Vehicular navigation system providing direction data

Details Vehicular navigation system providing direction data Vehicular navigation system providing direction data

1995-09-06

1999-08-17

Nguyen, Tan Q.

Data processing: vehicles, navigation, and relative location

Navigation

Determination of travel data based on the start point and...

701209, 701211, 340990, G01C 2100, G06F16500

Patent

active

059387181

ABSTRACT:
In order to provide a driver with guidance for a direction of travel without confusing the driver even in a case where the angular difference between an approach road and a departing road at a branch point is very small or even when a branch point has a complicated shape, a navigation system is provided with present-position sensor for calculating present position of the vehicle; an input for entering information necessary for calculating a route; an output for giving notification of information for carrying out route guidance; an information storage device in which all data necessary to carry out route guidance has been stored; route calculator for calculating a route based upon the information entered by the input; route storage for temporarily storing the route calculated by the route calculator; and a guidance control unit for outputting guidance information relating to the route to the output. The information storage device stores branch-point data and road data connected to branch points and has direction data indicative of a departing road with respect to an approach road connected thereto by a branch point. The guidance control unit outputs the guidance information to the output based upon the direction data.

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