摘要
根据围岩蚀变在TM图像上具有的光谱特征,利用比值增强、主成分分析及比值增强后主成分分析等方法,对四川省稻城地区围岩蚀变信息进行提取和分析。通过多层次的筛选和评估,提取异常区,制作遥感异常图。
Abundant spectral and continuous spatial information of the satellite TM data is being applied extensively. On the basis of analyzing spectral characteristics of TM image data and according to spectral characteristics of rocks and ores as well as the theory of extracting information from remote sensing data, this paper utilized such methods as band ratio, principal component analysis and principal component analysis after ratio strengthening to extract mineralization -alteration information. Through screening and evaluation, the prospecting target can be delineated and the remote sensing map can be drawn.
出处
《国土资源遥感》
CSCD
2008年第4期92-95,共4页
Remote Sensing for Land & Resources
关键词
遥感
围岩蚀变
比值
主成分分析
信息筛选评估
Remote sensing
Wall- rock alteration
Ratio method
Principle analysis
Screening and evaluation
