| 摘要 |
PROBLEM TO BE SOLVED: To reduce the data amounts of running trajectory data to be recorded while making it possible to acquire an accurate road shape from the running trajectory data. SOLUTION: In the data capture timing for each of its own vehicle travel of a predetermined distance (for example, 10m), a control part 4 acquires the data of the location and traveling direction of its own vehicle from its own vehicle location detecting part 2, and predicts the location of its own vehicle in the next data capture timing, and determines whether or not the deviation of a distance between its own vehicle location data acquired in the data capture timing and the predicted location of its own vehicle is not less than a threshold (for example, 1% of the traveling distance). Then, when it is determined that the deviation of the distance is not less than the threshold, the data of the location of its own vehicle at that time are recorded in a recording part 6 as running trajectory data. The location of its own vehicle to be predicted in the next data capture timing is calculated, on the basis of the location and traveling direction of its own vehicle in the previously (latest) recorded point, by extending the distance assuming that the traveling direction is maintained. COPYRIGHT: (C)2006,JPO&NCIPI |
