抄録
Locations of wastelands where had been paddy fields in 1987 and 1990 were distinguished by multitemporal NDVI calculated from SPOT(HRV) data. Seasonal profile of NDVI shows characteristic pattern according to land use such as wastelands, paddy fields, conservation paddy fields, forage crop fields, soybean fields and buckwheat fields. NDVI thresholds for several periods to detect wastelands were determined. Wastelands designation by several periods NDVI data was more accurate than by single one.
