赣中红壤区TM图像的居民地信息自动提取专家模式研究

从遥感信息分析入手,分析了抚州地区居民地在Landsat TM1 TM2 TM3 TM4 TM5 TM6 TM7各个波段上与其它背景地物的可分性。通过对各地物光谱曲线特征进行分析,利用居民地光谱特征与其它地物的差异性,建立条件表达式,即可把该区的居民地提取出来。通过验证,其点位精度达到81%,面积精度达到75%。该研究表明,通过简单模型的建立,可将以水泥顶房屋和瓦顶房屋为主的居民地提取出来。

THE EXTRACTION OF RESIDENTIAL AREA ON LANDSAT TM IMAGERY FROM RED EARTH REGION IN CENTRAL JIANGXI

Rapid and accurate collection of the information of residential area is very important in evaluating the damage caused to building and property. The difference between residential area and other areas in Fuzhou region is analyzed by the remote sensing image of landsant TM1, TM2, TM3, TM4, TM5, TM6 and TM7.As the bare lands appear everywhere and are very extensive, the differentiation of the bare lands from the residential area should naturally be emphasized. The residential area can be extracted with a model of the spectral characteristic curves on the basis of knowledge acquired, with the positioning accuracy and the area accuracy as high as 81% and 75% respectively. In a word, the residential area can be extracted from Landsat TM with a simple model.