路网空间下郑州市兴趣点分析与可视化研究

在网络核密度算法的基础上,结合郑州市道路网特点设计了基于网络栅格剖分的网络核密度计算模型,得出路网空间下郑州市不同类型兴趣点(POI)网络核密度的分布结果,并借助三维可视化方法对计算结果进行直观表达,揭示了郑州市POI空间分布的内在规律.结果表明:(1)网络栅格剖分核密度算法在路网空间下对POI进行空间密度分析,更好地反映了与交通强相关POI的分布规律;(2)三环内外的POI网络核密度结果有着显著的差别,三环可作为当前郑州市中心城区的边界线;(3)不同类型的POI在分布格局和聚集形态整体上差别较大,体现出行业之间巨大的差异性.

Research on POI Analysis and Visualization of Zhengzhou City under Road Network Space

Based on the network kernel density estimation algorithm and the characteristics of Zhengzhou city road network,the network kernel density estimation calculation model was designed based on network grid partitioning,which obtained the distribution results of kernel density of different types of POI networks in Zhengzhou City under the road network space. The three-dimensional visualization method was used to visually express the calculation results,revealing the inherent law of POI spatial distribution in Zhengzhou City. The results showed that:( 1) the network grid segmentation kernel density estimation algorithm better reflected the distribution law of POI related to traffic by spatial density analysis of POI in road network space;( 2) there were significant differences in the kernel density results of POI networks inside and outside the 3 rd ring. The 3 rd ring could be used as the boundary line of the current downtown area of Zhengzhou;( 3) the distribution patterns and aggregation patterns of different types of POIs varied greatly,reflecting the huge differences between industries.