Application Study on the Extraction of Mineralized Alteration in High and Cold Mountain Area

Accurate extraction of mineralized alteration from remote sensing image has an important theoretical and realistic significance.In this paper,using ETM+ multispectral data,the author develops an improved spectral angle mapper——Quantitative Spectral Angle Mapper to extract mineralized alteration in high and cold mountain area of west Tianshan,Xinjiang.The test shows that Quantitative Spectral Angle Mapper can extract effectively mineralized alteration and the method has a certain theoretical reference value.