摘要
针对传统测度方法对交通网络分布的形态特征和复杂性描述困难,以及交通网络分布影响因素的定量研究较少等问题,该文以分形理论为基础,借助ArcGIS软件,测算了湖南省全域公路交通网络的长度维数、分枝维数以及所辖14个地市州各级公路交通网络的相似维数及权维数;运用SPSS软件,研究了公路交通网络分形特征的影响因素。结果表明:湖南省公路交通网络分形特征明显,长度维数大于分枝维数,密度优于通达性;张家界市的权维数最低,其余地市州介于1.034~1.114之间,公路交通网络地区差异不大,覆盖相对均衡;区域尺度上公路交通网络权维数与地形起伏度之间存在较强的负相关关系,与GDP等社会经济指标相关性不大。相关成果可为湖南省交通网络布局优化提供决策参考。
In view of the fact that traditional measurement methods are difficult to describe the morphological properties and complexity of traffic network distribution,and there are few quantitative studies on the influence factors of traffic network distribution,based on fractal theory,this paper calculated length dimension(DL)and branching dimension(Db)of highway network of Hunan Province and measured similarity dimension and weighted similarity dimension(Dws)of highway network of the 14 cities with the support of ArcGIS software,and then SPSS statistical software was used to analyze the influencing factors of the fractal characteristics of highway network.The results showed that the distribution of highway network had remarkable fractal characteristics in Hunan Province and the DL was greater than the Db,which meant the highway density was superior than the accessibility.Zhangjiajie City had the lowest Dwsand the weighted similarity dimensions of other cities were between 1.034and 1.114,indicating that the highway network had little regional difference,in other words,it was evenly distributed.Additionally,in regional scale,the Dws of highway network was negatively correlated with relief amplitude whereas had little correlation with social and economic indicators such as GDP.Relevant results can provide decision-making references for the optimization of transportation network layout in Hunan Province.
作者
李博
杨波
陶前辉
左青
LI Bo;YANG Bo;TAO Qianhui;ZUO Qing(College of Resources and Environmental Sciences,GIS Research Center,Key Laboratory of Geospatial Big Data Mining and Application,Hunan Normal University,Changsha 410081,China)
出处
《测绘科学》
CSCD
北大核心
2019年第12期79-85,共7页
Science of Surveying and Mapping
基金
国家自然科学基金项目（41171342）
湖南省教育厅重点项目（17A127）
关键词
公路网络
分形特征
GIS
湖南省
highway network
fractal characteristics
GIS
Hunan Province
