抚州地区TM影像的水土流失信息自动提取专家模式研究

Automatically Extracting the Loss Area of Water and Soil from Landsat TM Image in Fuzhou Area of JiangXi

从遥感信息分析入手 ,分析了抚州地区水土流失区在LandsatTM1,TM2 ,TM3,TM4,TM5 ,TM6 ,TM7各个波段上与其它背景地物的可分性。利用水土流失区光谱特征与其它地物的差异性 ,建立条件表达式 ,并建立简单模型 ,即可把该区的水土流失区提取出来。该区土地利用率不是很高 ,水土流失比较严重 ,而且面积大。由于居民地光谱特征与水土流失区比较接近 ,所以区分居民地与水土流失区成为研究的重点。研究表明 ,通过建立简单的模型 ,可以将水土流失区提取出来 ,并能达到很好的效果。

The difference between soil and water loss area and other background object is analyzed in Fuzhou area by the remote sensing of Landsat TM1,TM2,TM3,TM4,TM5,TM6,TM7. The soil and water loss parts is extracted from this area by the difference of spectrum feature of soil and water loss area and other ground object, the conditional expression and the simple model. Utilization ratio of land of this area is low, Soil and water loss is very severe and its area is large. Because the spectral signature of residential area and soil and water loss area is close, it becomes the emphasis to distinguish soil and water loss area and residential area. The study indicates the soil and water loss area can be extracted by established simple model.