Comparison and Analysis on Methods of Snow Cover Mapping by Using Satellite Remote Sensing Data
卫星遥感盖制图方法对比与分析

The three kinds of methods, such as training sites Supervised Classification (SC), Digital Numbers (DNs) statistics and Normalized Difference Snow Index ( NDSI) have been used to map snow cover distribution and then to calculate snow cover area. In this study, the remote sensing data sets from Landsat TM, Moderate Resolution Imaging Spectroradiometer(MODIS) and NOAA/AVHRR were selected to utilize for mapping snow cover since these images are most current remote sensing data to be