Patent ID: 6581005
Filing Date: 2003-06-17
Classification: G01C

Abstract:
A vehicle position calculation apparatus comprising:a vehicle position measuring section measuring a vehicle position; a position correcting shape memory section storing road shape data including position correction shapes composed of a group of line segments representing a center of a road and a two-dimensional closed regional shape correlated with a predetermined location on a map; and a vehicle position correcting section correcting the vehicle position on the map to be in alignment with a point on corresponding one of the position correction shapes stored in the position correcting shape memory section, wherein the vehicle position correcting section includes: a correction reference determination unit determining whether to correct the vehicle position based on a reference of any one of the position correcting shapes stored in the position correcting shape memory section, on the basis of a close proximity or inclusive relationship between the vehicle position and the any one of the position correcting shapes; a line segment conformity position correcting unit correcting the vehicle position so as to allow the vehicle position to be aligned onto a point of the line segment which the correction reference determination unit determines as the reference; and a regional conformity position correcting unit correcting the vehicle position so as to allow the vehicle position to be aligned onto a point inside the closed regional shape or on a point of a contoured line segment of the closed regional shape which the correction reference determination unit determines as the reference.