| 摘要 |
PROBLEM TO BE SOLVED: To highly accurately obtain position information even in a position where a GPS signal does not reach, without installation costs and operation costs for a dedicated device and without correction of the position information due to movement of a device.SOLUTION: A GPS positioning part 151 performs a GPS positioning and stores position information, and a storage part 140 stores the position information. Then, a position information transmission part 105 transmits the position information in accordance with a control of a position information transmission control part 153. The position information transmission part 105 stops the transmission of the position information, when there is a possibility that the position information transmission part 105 has moved by a predetermined distance or more. |
