Study on changes of land use and land cover based on RS and GIS technology

Based on RS and GIS technology, the land use and land cover are classified to six types,and their changes and distribution from 1985 to 1990 and from 1990 to 1995 in mountainous area,Northen Thailand are analyzed. The results show that forest area is declined dramatically,but area of farmland,grassland, bareland and town increased. The change tendency is from forest to farmland,grassland and town. Most of the changes occur in flat area.