A vehicle navigation apparatus displays a map on a display screen by using detailed map information. The apparatus displays map information at a plurality of scale, or zoom, levels. The apparatus selectively displays or does not display any given road based on both display scale and the importance, or...http://www.google.fr/patents/US6587787?utm_source=gb-gplus-shareBrevet US6587787 - Vehicle navigation system apparatus and method providing enhanced information regarding geographic entities
Vehicle navigation system apparatus and method providing enhanced ...
