Patent ID: 8793090

Claim:
A track information generating device comprising: a self-contained navigation track acquisition unit that acquires a self-contained navigation track that is a track of a vehicle indicated by a plurality of time-series pieces of self-contained navigation information obtained from a speed sensor and a direction sensor on the vehicle; a matching track acquisition unit that acquires a matching track that is a track of the vehicle indicated by a plurality of time-series pieces of information determined through a map matching process in which a road, of which a shape indicated by map information most coincides with the self-contained navigation track, is determined as a road on which the vehicle is traveling, and that acquires a degree of reliability of the matching track; a GPS track acquisition unit that acquires a GPS track that is a track of the vehicle indicated by a plurality of time-series pieces of GPS information obtained from a GPS sensor on the vehicle; and a self-contained navigation information correcting unit that: compares the self-contained navigation track with the GPS track to determine a degree of reliability of the GPS track by increasing the degree of reliability of the GPS track as a degree of coincidence between a shape of the self-contained navigation track and a shape of the GPS track increases; and sets one of the GPS track and the matching track, having a higher degree of reliability, as a correction target track to correct the self-contained navigation information by reducing a difference between the self-contained navigation track and the correction target track.