Patent ID: 9714836
Date: 2017-07-25
CPC Classifications: G01C,G01S

Claim:
1. A vehicle position identifying system that identifies a position of a vehicle using an absolute position coordinate based on radio navigation and a relative position coordinate based on at least vehicle speed, the vehicle position identifying system comprising: a history information acquiring unit that acquires traveling history information including the absolute position coordinate and the vehicle speed from the vehicle; a section-for-reference generating unit that sets, for the acquired traveling history information, a section for reference in which a traveling area is common; a first distance calculating unit that reads two absolute position coordinates concerning a same vehicle that are transmitted at different points in the section for reference, and calculates a distance between the two absolute position coordinates as a first distance on the basis of road map information; a second distance calculating unit that reads the two absolute position coordinates and calculates the distance between the two absolute position coordinates as a second distance on the basis of the vehicle speed included in the traveling history information; and a position identifying unit that selectively performs, according to an absolute value of a difference between the first distance and the second distance, one of identification of the vehicle position using the absolute position coordinate based on the radio navigation, identification of the vehicle position using a vehicle speed integrated value, and identification of the vehicle position using both of the absolute position coordinate based on the radio navigation and the vehicle speed integrated value.