Abstract：Abstract Satellite remote sensing can detect earth.surfacial features from space. The environmental factors impact on TM data spectral signatures used to differentiate the alteration from surrounding rocks, is evaluated in Dong mao area.The method studied includs three aspects(1) TM data mask; (2) PCA, (3)PC component bilinear scatter map (MPS). TM data mask is used to mask out those pixels representing loess and clouds. PCA can increases the seperation between specture features more than one TM bands and then it follows that fewer bands to be used achieve higher degree of accuracy for ident ifying the altered rock spectrum signature. The Pc Component Scattering map is used to Analysis of PC component weighings and then the classification map is made according to the analytical result. This process can be monitored by the interactive mode between geologist and computer.This method is proved to be very effective in the study. The method is also successfully applied in recognating alteration in high altitude area in Northen Canada
马建文, 张齐道. 利用TM数据提取含金蚀变带的方法研究─以冀北东卯地区为例[J]. 国土资源遥感, 1994, 6(2): 41-45.
Ma JianWen, Zhang Qidao. STUDY ON THE METHOD OF IDENTIFYING HYDROTHERMALLY ALTERED ROCKS USING TM DATA. REMOTE SENSING FOR LAND & RESOURCES, 1994, 6(2): 41-45.
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1994, Vol. 6 
