Quantitative Measurement of Spatial Pattern of Non-agricultural Land in Urban Fringe

The plain of Fangshan District in Beijing is taken as an area for case study.The present study tends to undertake quantitative measurement of the spatial pattern for non-agricultural land from two aspects.One is the quantitative description of non-agricultural land patches.Three index(fractal dimension,shape index,and circularity) were used to describe spatial graphics of non-agricultural land patches.It is shown that the values of those indexs are always distributed within a limited range by statistics of frequency.The other is quantitative analysis on the spatial distribution of non-agricultural land by variable clumping method(VCM)supported by GIS.