采用GIS/RS技术,利用1988、1996、2001、2006年TM图像,借助FRAGSTATS3.3软件,计算西宁城市景观最大斑块指数LPI、景观形状指数LSI等8个常用指标,认为西宁城市建设用地景观PLAND指数与水体、农业用地PLAND指数呈逆向变化,城市景观复杂程度在加大;在西宁城市景观格局演化过程中,地形地貌等自然条件基础奠定了城市景观格局轮廓,城市人口增加和城市的生产生活活动对景观格局演化有重要影响,而区域和城市的各种规划法规和国家区域发展政策对城市景观格局具有引导和修正作用。
By using GIS/RS technology,TM images in 1988,1996,2001,2006 and with FRAGSTATS3.3 software,this article computes eight commonly used indicators in Xining such as landscape Largest Patch Index(LPI),landscape shape index(LSI).It is concluded that in the process of landscape pattern changing,the topography and other natural conditions makes a foundation;the urban population increasing,urban production and living activities promote the evolution of the landscape pattern;a variety of regional and town planning regulations and the national region development policies guide and amend the landscape pattern.