Abstract
In the government control of rice production, the local government checks whether planting was carried out as planned. This is hard work that checks a number of fields on foot in a short term under the severe weather condition. Also, the representative in each check area is required to accompany as a guide of the field. However, it becomes difficult every year to keep enough manpower for the check work. The efficient and laborsaving way of checking out is demanded. We developed a field check system using mobile GIS. This system runs on mobile computers such as a tablet PC and a PDA. The system is easy to operate by a pen device and suitable for outdoor use. In the conventional check work, the farmers place check cards on the fields. We also use the check cards, but we changed the role of check cards. We print only a large symbol on each check card. The symbol is able to identify from the distant place. So we can move by a car and check the fields accurately and efficiently from inside a car. We investigated the efficiency of the check work using this system. In the field trial, we investigated as a pair, one is the driver of the car, and the other is the system operator. As a result, we could check out about 80 fields per an hour in the condition with scattering of the fields. Most of the fields were checked from inside the car and less than 10 percents of the fields were checked outside the car. The efficiency of the check work is about 3 times as much as the conventional way. The conventional way assumes that the investigators walk the same route by the car. Therefore, by using this system, the check work carried out with good efficiency and laborsaving.
