基于GIS的武汉市道路密度空间分异特征

以武汉市行政区和街道为研究单元,以道路密度为主要指标,通过GIS的叠加分析、空间插值分析等空间分析功能,同时结合全局自相关和局部自相关分析,对武汉市道路密度的空间分布差异进行研究。结果表明,汉口道路最为稠密,武昌最低,道路集中分布在硚口区、江汉区和江岸区的东南缘。武汉市道路密度全局Moran's I=0.418 2,空间集聚特征显著;局部Moran散点图显示其道路空间差异性和集聚性明显。道路网呈现出3条主结构线:一条在汉口沿汉江、长江分布,呈片状连续分布;一条在武昌西北部沿长江沿岸呈串珠状分布;一条在武昌区南部,呈小片状间断分布。武汉道路密度与人口分布有高度的正相关关系,但与各区的GDP水平关系并不明显。

Spatial Distribution Characteristics of Road Density in Wuhan Based on GIS

By using administrative region and street area in Wuhan as the research unit,road density as the main index,by means of the ArcGIS superposition analysis and interpolate method,together with autocorrelation analysis,this paper analyzed the spatial differentiations of road density in Wuhan.The results show that Hankou’s road density is the highest,Wuchang is the lowest,and the road is together distributed on the southeast of Qiaokou、Jianghan and Jiang’an area.Moran's I and Moran Scatterplot show that the spatial distribution of road density has obvious clustering features.There have three main structure road lines: one is continuously distribute along with Hanjiang and Changjiang river;the next one’s distribution on the northwest of Wuchang administrative region is like a pearl necklace,along with Changjiang river too;the last one has a discontinuous distribution.The road density of Wuhan has a strong and positive correlation with population,but not so clear and obvious with the GDP of each administrative region.