The Study of Band´s Choice for the Extraction Grassland Desertification Information Based on TM Data

Through a lot of ground to investigate, collect a large number of semi-fixed, fixed and mobile sand-like region of the corresponding point of the value of the spectrum, the formation of its spectral characteristics of the curve, in combination with TM remote sensing image is reflected in the spectral features characteristic of the sand The type of inter-band gray, as well as changes in the value of the index of the best areas such as a comprehensive analysis found that for Sandy Land of Inner Mongolia region of Inner Mongolia Desertification extract information, select the TM data TM5, TM4 and TM3 band combination with some Desertification performance of the combination of image information (such as principal component transform, ratio images, etc.), through the supervision of classification, can well meet the needs to extract desertification information.