道路网信息层次度量方法

A hierarchical approach for measuring information content of road networks

针对目前以信息熵度量道路网信息方法存在的不合理、不准确的问题,该文提出一种基于空间认知的道路网信息层次度量方法。从地图空间信息产生的本质出发,结合空间信息认知的层次性特点,将道路网空间信息划分为3个层次:元素层次道路要素的几何形态信息、邻域层次邻接道路的空间关系信息、整体层次道路分布信息。依据各层次空间特征的多样性,分别建立3个层次空间特征的定量描述指标,计算基于各指标的几何形态信息、空间关系信息、道路分布信息。最后,通过实验分析验证了该方法的合理性。

Aiming at un-reasonability and inaccuracy of existing information entropy method for measuring the information content of road network, a hierarchical method based on spatial cognition for measuring the information content of road network was proposed. In this paper, based on the essence of map spatial information and the hierarchical features of spatial information cognition, the spatial information of road network was divided into 3 levels： the geometrical information at element level, the topological adjacency information at neighborhood level and the distribution structural information at global level. According to the diversity of the spatial features of each level, the quantitative index of 3 levels of spatial characteristics was established, and then calculated geometrical information, spatial relation information and road distribution information. Finally, the rationality of the method was verified by experiments.