文章编号： 1672-5328（2020）05-0045-09

路启1，阚长城2，魏星1，阴炳成1
(1. 天津市城市规划设计研究院，天津300201；2. 百度时代网络技术(北京)有限公司，北京100085)

摘要： 为了明确天津市双城格局下的城市通勤圈范围，利用百度LBS数据识别出用户的居住地、就 业地，并计算其通勤出行范围。在此基础上，采用就业人口比例法和热力图等值线法识别天津市双 城通勤圈范围。验证了天津市双中心的城市布局中确实存在两个独立的通勤圈且在覆盖范围、集聚 度等方面存在明显差异，双城结构下的通勤圈与单中心城市也存在显著差异。利用外环线和综合通 勤圈将天津市划分为三个层次分区，通过人口、就业岗位、建设用地、通勤交通需求、交通基础设 施等方面比较可知，三个层次分区存在明显差异性。该识别结果加深了对天津市域空间结构的认 识，为在市域范围内分层次、分区域制定有针对性的规划政策提供依据。

关键词： 大数据；通勤圈；双城结构；LBS数据；通勤距离

中图分类号： U491

文献标识码：A

Commuting Circle in Twin Cities of Tianjin Based on Location-Based Service Data

Lu Qi1, Kan Changcheng2,Wei Xing1, Yin Bingcheng1
(1.Tianjin Urban Planning & Design Institute, Tianjin 300201, China; 2.Baidu.com Times Technology (Beijing) Co., Ltd., Beijing 100085, China)

Abstract： To elucidate the scope of commuting circle in twin cities of Tianjin, this paper utilizes Baidu Location-Based Service (LBS) data to identify users' residence location and place of employment and calculate their commuting range. On this basis, the employment-to-population ratio and heat map isoline methods are used to show commuting circle in twin cities of Tianjin. The results show that there are two independent commuting circles in the dual-center urban layout of Tianjin, and there are obvious differences in coverage, agglomeration, etc. There are also significant differences between the twin cities commuting circle and that of single-center cities. Dividing Tianjin into three special zoning levels by the outer ring road and comprehensive commuting circle, the paper compares population, employment, land use development, commuting travel demand, and transportation infrastructures, and concludes that there are distinctions in the three levels of zones. The findings are helpful in better understanding of the spatial structure of Tianjin metropolitan area and making targeted planning policies at different levels and areas within the city.

Keywords： big data; commuting circle; twin city structure; Location-Based Service (LBS) data; commuting distance