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Research on function combination and spatial structure of construction land in Guangzhou railway station and railway eastern station area

CAO Xiao-shu1,ZHANG Kai2,MA Lin-bing1,YAN Xiao-pei1(1.School of Geography and Planning,Sun Yat-sen University,Guangzhou 510275,China;2.Evergreen Real Estate Consultants Limited,Guangzhou 510080,China)  
With the comparability index and the evenness concept,this paper analyses the function combination and spatial structure characteristics of construction land in Guangzhou railway station and railway eastern station areas.The results indicate that,in railway station area,plots of the first function category occupy 33.33% of the total,in which the public service function plots predominate;plots of the second function category occupy 47.62%,of which the plots with residential,travel industrial and commercial functions predominate;and plots of the third function category occupy 19.05% of the total.The function combination of railway station area presents a mixture of two categories and dominated land use and complexity of more than two categories dominated construction land use,being 66.67% according to plot statistics.In railway eastern station area,plots of the first function category reach 20% of the total,in which the residential function plots predominate;plots of the second function category occupy 65%,in which the plots with official and residential mixed function predominate;and plots of the third function category occupy 15% of the total.The construction land function in Guangzhou railway station and railway eastern station areas mainly combine with residential function,leading to a higher transport flow than the normal residential area.Construction land of all categories in railway station area is distributed spatially as group structure in sheets.It could be divided into two parts according to the fragmentation degree of grid plots,one is northwestern part which is relatively fragmentized,and the another is southeastern part which is relatively integrated.The external traffic land in railway eastern station area is rather compact.In this area,the grid plots in the middle are relatively integrated,and the ones in its periphery are relatively fragmentized.Various categories of construction land in these two railway station areas are distributed spatially as group structure,but very different in evenness.According to the evenness of all kinds of construction land in railway station area,the list is:G(0.65)R(0.55)T(0.48)C(0.40)U(0.39);and in railway eastern station area,it is:G(0.74)R(0.56)C(0.46)T(0.27).In these two areas,the spatial distribution of green land and residential land is relatively compact(evenness0.50),and the distribution of other kinds of land is relatively fragmentized(evenness0.50).The average evenness of various kinds of land in eastern station area is larger than it is in theother area.Thus,the spatial structure of construction land in railway eastern station is better.
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