Patent ID: 6424911
Filing Date: 2002-07-23
Classification: G01C,G05D

Abstract:
An intersection display method for generating and displaying an intersection shape by use of map data including a road network, the method being for use in a map display unit for displaying a map for guidance, and the method comprising:reading from the map data an intersection node representing an intersection and intersection-connected links representing roads connected to the intersection node, included in the road network; generating width-imparted intersection-connected links for each intersection-connected link, respectively, by specifying a road width of each of the intersection-connected links, respectively, based on information associated with each of the intersection-connected links, respectively, and drawing side lines representing edges of the road on right and left sides of each of the intersection-connected links, respectively, based on the specified road width of each of the intersection-connected links, respectively; sorting positions of the width-imparted intersection-connected links based on bearings at which the intersection-connected links are connected to the intersection node; generating an intersection shape at the intersection node such that all cross points between the side lines of the sorted width-imparted intersection-connected links are contained within the generated intersection shape; and displaying the intersection shape together with other information for guidance notification.