Road map display system with indications of a vehicle position a

Details Road map display system with indications of a vehicle position a Road map display system with indications of a vehicle position a

1982-04-29

1985-09-24

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340721, 340750, 340995, 364449, G09G 108

Patent

active

045435723

ABSTRACT:
A road map display system comprises a map memory for storing map image data, a sensor for detecting the travelling distance and travelling direction and outputting a signal representative of the angular offset between the direction of travel and an axis of a map coordinate system, an arithmetic means for calculating the map coordinates of a point halfway between the vehicle position and the destination, a coordinate transforming means which transforms the map image data to a display coordinate system, the origin of which lies halfway between the vehicle and the destination and the y-axis of which lies parallel to the direction of travel, a display memory in which the map data and symbols representing the destination and the position and the direction of travel of the vehicle are stored in terms of the display coordinate system, and a display means displaying the information stored in the display memory on the display screen.

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