In this research,the TM image is used in the PCA transformation in order to reduce the correlation among the features.The new image is synthesized by the first,second,third principal components in the way of RGB after PCA.It is obvious that new image is better in expressing the ground information.With the reference knowledge the samples were purified and a more precise classification signature was built.Then,the classification was supervised and areas of each type were computed.Through evaluating classifica...
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