研究丽江玉龙雪山在1974年、1989年、2002年3个时段的动态变化.数据源是.1974年的MSS影像、1989年的TM影像和2002年的ETM影像.首先运用Arcgis软件的矢量化功能分别对3个时段的冰雪信息进行提取,并对每个时段所提取的冰雪信息进行空间分析.最后用Arcgis计算工具计算出各个时段冰雪的面积,从而分析其在1974年、1989年、2002年3个时段以来的动态变化趋势,并分析影响其变化的原因,以及对丽江生态环境、气候、旅游资源的影响.%The dynamic changes of Yulong jokul in the phases of 1974, 1989 and 2002 are studied.The data sources are the MSS image in 1974, the TM images in 1989 and ETM image in 2002.First of all, using the function of vector in Arcgis software to extract ice and snow information in the three stages respectively, and do simple spatial analysis to the extracted ice and snow information at each stage; Finally, using Arcgis calculation tools to calculate the various stages of ice and snow to get the dynamic changes trend in times of 1974, 1989 and 2002.And to analyze the impact of the changes in the causes of the ecological environment as well as climate and tourism resources.
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