THE METHODS FOR EXTRACTION OF ALTERATION ANOMALIES FROM THE ETM~+(TM) DATA AND THEIR APPLICATION: METHOD SELECTION AND TECHNOLOGICAL FLOW CHART

This is the second paper among the serial articles on the new parameter for the prediction of the mineral resources: alteration RS anomalies. The RM (Ratio Method),SAM (Spectral Angle Mapper)and PCA (Principle Component Analysis) were compared with each other by the analysis of their principles and by the model test. PCA was selected as the main method and SAM as the supplementary one. The essential concepts of the error theory were quoted. The standard deviation σ was used as the measure for anomaly slicing. The flow chart "De-interfered Anomalous Principal Component Thresholding Technique" was given. A practical application example for Qulong-Jiama anomaly group in Tibet was given in comparison with the hyperspectral results.