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[摘要]：本文利用ArcGIS软件数字化淮海经济区扫描地图，取得了各等级公路的矢量数据。基于分形理论，利用回转半径法分别测算淮海经济区及其四个具有代表性的城市公路交通网络的半径文数、分枝文数及其对应的相关系数，分析淮海经济区全域与其四个核心城市的半径文数与分枝文数的空间分布特征。考虑到不同等级道路对于研究结果的影响，分别计算淮海经济区全域及其四个核心区不同等级道路长度占道路总长的百分比。研究表明淮海经济区全域及其核心区道交通网络不同程度上表现了分形特征。淮海经济区交通网络密度、结构低于国家路网规划的水平，核心城市之间存在着差异，并且交通网络发展水平都比较低，仍有巨大的发展空间。40752
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[毕业论文关键词]：交通网络；分形理论；半径文数；分枝文数；道路等级；淮海经济区
[Abstracts]：By using the ArcGIS software to digitize Huaihai economic zone scanning map, the vector data of grade highway is obtained in this paper. Based on fractal theory , length-radius dimension , branches-radius dimension and corresponding correlation coefficient of transportation network of Huaihai economic zone and main four representative cities are calculated with the method of radius of gyration. By combing length-radius dimension with branches-radius dimension , the paper analysed the space distribution characteristics of transportation network of study area.Considering the influence of road level differences to the results of the research, the paper calculated respectively the percentage of different level roads in the domain and its four core cities. Studies have shown that the transportation network of Huaihai economic zone and its four core cities displayed fractal features to some extents. The level of transportation netwok density and its structure of Huaihai economic zone is below the level that the nation has planned . There are differences between the four core cities and the development level of their transportation network is low. Therefore, there still exists huge development space in the future.