Research on the Methods of Obtaining Satellite Snowcover Information
雪盖卫星遥感信息的提取方法探讨

The methods of obtaining satellite snowcover information were described and discussed in this paper. The threshold value of snow was used for extracting snowcover information from NOAA/AVHRR images,and the Normalized Difference Snow Index (NDSI)was used for acquiring snowcover image from Landsat TM data. In order to derive more detail snowcover information, the matching technique of NOAA/AVHRR and TM images was also involved in the research. The results showed that the accuracy can be improved when the methods were used in the extraction of snowcover information from satellite images.