通过对香格里拉县3个时段遥感卫星影像的解译,得到1974、1989、2000年3期森林景观分类数据.借助GIS的空间分析功能,从海拔、坡度和坡向等自然因素分析了地形因素对景观变化的影响;在人文驱动方面,利用成本距离分析方法研究了居民点、道路、农地对森林景观变化的影响,并对成本距离与景观空间变化关系进行了函数拟合.结果表明,香格里拉县森林变化呈先增加后减少的趋势;森林变化在海拔3 200～4 200m、坡度<30°地段最为活跃;森林在阴坡上的变化明显大于阳坡;森林变化与距居民点、道路、农地的距离具有较高的相关性,通过数学拟合达到了较高的拟合精度.%Through interpreting the remote sensing satellite images of three stages in Shangri-La County,three stages categorical data of forest landscape in 1974,1989 and 2000 were obtained. Based on spatial analysis function of GIS,from the aspects of elevation,gradient and slope direction,etc. ,the control function of topographic factors on landscape change was analyzed. In the driving force of humanity,the cost distance analysis was used to study the effect of residential area,road,agricultural land on forest landscape changes,and function fitting was carried out for the relationship between cost distance and landscape spatial change. The results indicated that the variation of forest in Shangri-La County showed the trend of first increasing and then decreasing; the changes of forest was obvious in the elevation of 3 200-4 200 m and gradient ＜30°; the changes of forest in sunny slope was greater than that of cloudy slope; there are greater correlations between changes of forest and residential area,road,agricultural land,finally,based on mathematics fitting,fit precision attained a higher level.
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