着重论述了从卫星遥感资料中提取雪盖信息的一些方法.结果表明,利用积雪阈值参数从NOAA/AVHRR图象中提取雪盖信息方法和利用积雪指数(NDSI)从陆地卫星TM图象中提取雪盖面积的技术,以及利用NOAA/AVHRR和TM信息复合的技术,可提高信息获取的精度,具有实用价值.

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.