| 摘要 |
<p>A portable terminal device for measuring the distance between two waypoints by moving between them, the portable terminal device having a start instruction section for instructing the start of measurement of a distance, an acceleration acquisition section for acquiring acceleration of the movement of the portable terminal device, a distance calculation section for calculating, based on the acceleration acquired by the acceleration acquisition section, the distance of the movement from a waypoint at which the start of the measurement is instructed by the start instruction section, and an informing section for informing the user, when the distance of the movement calculated by the distance calculation section has reached a predetermined distance, that they are at a destination waypoint away from the start point by the predetermined distance.</p> |
