Abstract
The objective of this research is to develop grass-land reclamation criteria using an information technology. To develop the grass-land reclamation criteria, the terrain of grass-land was resolved into the spatial frequency by discrete Fourier transform (DFT) using the digital elevation model (DEM). The DEM was generated by the measurements before and after the grass-land reclamation. Then, the geographical features and the spatial frequency information in the same field were compared. To make a GIS map based on terrain information, absolute location of the grass-land surface is essential. To measure the elevation efficiently, a tractor-based survey system was developed. A farm tractor equipped with a real-time kinematical global positioning system (RTK-GPS) and an inertial measurement unit (IMU) was used. As a result, the spatial frequency which shows a large change was in the range of 0.02~0.05[1/m]. Moreover, smooth geographical features of grass-land was obtained by deleting the spatial frequency of 0.02~ 0.05[1/m] from the actual geographical features before the grass-land reclamation.
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