| 摘要 |
PROBLEM TO BE SOLVED: To provide an intersection drawing system which allows a user to accurately recognize route information which are likely to be hidden in a route display, when an intersection as the object is displayed three-dimensionally. SOLUTION: A map data and a route data of an intersection as the object are handled by an altitude-generation means 7, a road modeling means 8 and a prospective conversion means 9 to generate a data for a three-dimensional display. The presence of a road is adjusted by a hidden route judging means 10 as located closer to a view point on the same visual axis than a path. This road undergoes a drawing processing, so as to keep the path from being hidden by a route display means 12. |
