基于POI数据西安市商业集聚特征分析

A POI Data-Based Analysis of Commercial Agglomeration Characteristics of Xi’an

商业网点的空间分布特征是城市商业活动的重要体现,研究商业网点的空间分布,有利于了解该地区商业发展现状及趋势.以西安市中心城区为例,基于商业兴趣点(POI)数据和西安市路网数据,运用核密度分析法、最近邻指数法、 Getis-Ord Gi*指数法,分析西安市中心城区商业网点的空间分布特征.结果表明:西安市中心城区呈现出"一轴多核"的商业分布模式,"一轴"指的是西安城市南北中轴线长安路,"多核"包括高新区商圈、小寨商圈、龙首原商圈以及解放路商圈;以路网为单元,对西安中心城区进行网格划分,识别商业街区冷热点分布,其中商业热点分布区域与商业密度中心分布总体一致,呈现出"中心高-外围低"的商业分布模式;各商业类型发展态势不均衡,餐饮类、生活服务类、休闲娱乐类分布范围较广,住宿类、购物类、金融类以及商务类分布范围较为集中.

The spatial distribution of commercial outlets is an important manifestation of urban business activities. Studying the spatial distribution of commercial outlets in a region may help us to understand the current status and the development trend of business in it. Based on the commercial POI(point of interest) data and Xi’an road network data, and using the nuclear density analysis method, the nearest neighbor index method and the Getis-Ord Gi* index method, this paper analyzes the spatial distribution of commercial outlets in Xi’an downtown area. The results show that Xi’an downtown area presents a "one-axis multi-core" commercial distribution model. "One axis" refers to Chang’an Road, the north-south axis of Xi’an City. The "multi-core" includes: high-tech district business circle, Xiaozhai business district, Longshouyuan business circle and Jiefang Road business district. With the road network as a unit, Xi’an downtown area is divided into grids to identify the distribution of cold and hot spots in commercial districts, and the result shows that the distribution of commercial hot spots are consistent with the distribution of commercial density centers, showing a "high center-low periphery" commercial distribution pattern. The development of various business types is unbalanced, The distribution of catering, living services, and leisure and entertainment is wide, and the distribution of accommodation, shopping, finance and business is concentrated.