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《Scientia Geographica Sinica》 2002-01
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Study on Graphic Information Characteristics of Land Use Spatial Pattern and Its Change

LIU Xiang nan 1, XU Hong mei 2, HUANG Fang 1 (1. College of Urban and Environmental Sciences, Northeast Normal University, Changchun, Jilin 130024; 2.The Institute of Resource Science, Beijing Normal University/The Open Research Lab. of Envir  
Land use is a number of heterogeneous spatial pattern drived by complex force. Land use change displays not only quantity and quality change, but also spatial pattern change. In this article we discuss the method to describe spatial pattern of land use quantitatively. Furthermore, we select Qianguo County of Jilin Province as study area which lies in agro husb ecotone in north China and analyze spatial pattern change of land use change in this area based on geography graphic information theory and combined statistic analysis and spatial analysis of GIS. The results indicate that fractal dimension and circularity can reflect graphic information of land use patches from both the patch shape and coherence. The fractal dimension and circularity vary in different land use types and change with patch area. The fractal dimension of residence is the smallest while grassland largest, patch area have little influence on the fractal dimension of forest and residence which are almost unchanged during the study period, and the fractal dimension of grassland and farmland change significantly and this change is relative with patch area. The circularity of residence is largest among all the land use types while grassland smallest, and the circularity of grassland and farmland change small as patch areas become large. The circularity of residence is almost unchanged, but the circularity of forest, grassland and farmland decreased in different extent. The curve of variable distance buffer analyzing method can declare clearly the spatial distribution of patches by measuring the connectivity and concentration of patches. The VDM curve of farmland close to the left side of the scale and only has one peak, which show the patches of farmland close to each other. The VDM curve of both forest and grassland close to the left side also, by the patches of grassland closer than forest, and the VDM curve of residence has several peaks which mediate, and the patches of residence are disperse.
【Fund】: 国家自然科学基金 ( 4 990 10 17);; 霍英东教育基金 ( 710 2 9);; 教育部高等院校骨干教师资助项目
【CateGory Index】: F301
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