We use the SPOT images of 1980s and 1999 to make comparison, mainly composing of topographic maps digitizing and DEM , 1980s and 1999 images processing and interpretation and GIS system.

• 本项目采用1980年和1999年两期SPOT影像进行动态对比研究；主要内容分为地形图数字化及DEM生成、两期遥感影像解译、水土流失GIS系统建设三大部分.