Patent ID: 8473195
Filing Date: 2013-06-25
Classification: G01C,G01S

Abstract:
1. A positioning device for obtaining position data of a plurality of points on a movement route, comprising: a positioning unit that can measure a present position without requiring any past position data serving as a reference; a movement measuring unit for measuring a relative positional change; a position calculating unit for calculating position data of the plurality of points on the movement route based on position data of a first reference point and positional change data obtained through measurement of the movement measuring unit; and a correcting unit for correcting the position data of at least one of the plurality of points calculated by the position calculating unit based on difference information representing a difference between a position represented by the position data calculated by the position calculating unit and a position represented by a positioning result of the positioning unit with respect to any second reference point on the movement route; wherein the correcting unit executes a correcting calculation containing a correcting term based on a total route length measured by the movement measuring unit from the first reference point to the second reference point, a first route length measured by the movement measuring unit from the first reference point to a point at which position data of a correction target is obtained, and the difference information at the second reference point; and wherein a ratio of the first route length to the total route length is set as a coefficient, a displacement amount represented by the difference information is multiplied by the coefficient, and a product of the displacement amount and the coefficient is added to the position data of the correction target.