Abstract
The analysis of an orthophoto is effective for the classification of land cover in the large forest area. However, now the making of an orthophoto needs professional techniques, special equipment and much time. Therefore, it is expensive. In this study, we examined the generating of a digital orthophoto by the simple system using a personal computer and the developed programs. The generating time on this system was about 8 hours. It was a short time although it processed a lot of data. In addition, the comparison with the contour map showed that the average of error was 4.24 m. It was high accuracy in spite of a simple system.
