基于分形理论的黔东南城镇体系空间结构研究

The research about the spatial structure of Qiandongnan's urban system based on fractal theory

应用分形理论、借助GIS软件,测算了16个主要城镇的聚集维数、网格维数、关联维数,定量分析了黔东南州城镇体系的空间结构特征。结果表明:黔东南州的城镇体系空间结构主要表现为以州首府凯里市为中心、沿交通干线自组织演化;黔东南州城镇空间布局不均衡,发展重心向西北部倾斜;主要城市之间公路交通网络通达性较好,城镇体系各要素关联度较高,但关联效率有待提高;新交通线路的开通将打破黔东南州城镇体系原有的空间格局,有利于形成更加均衡和合理的城镇空间结构。

This paper put the fractal theory into the study on the Spatial Structure of Qiandongnan＇s Urban System by means of extraction data from GIS software and calculating three fractal dimension of sixtenn chief cities in study areas ——aggregation dimension,grid dimension and correlation dimension. The results show： The spatial structure of Qiandongnan＇s urban system built and carry on self organization evolution around the city of Kaili along the main lines of communication; The Spatial arrangement of Qiandongnan＇s urban system is not balance and the core of developing is lean to northwestward of Qiandongnan; It has been proved that the major cities and towns are in close contact and has excellent transport network accessibility,and each element of urban system closely connected,but the connected efficiency of each cith need increase; New access route will break out the primary structur of Qiandongnan＇s urban system and help for the balance and resonable develop of Spatial Structure.