基于百度热力图的武汉市主城区城市人群聚集时空特征

伴随着LAD和LBS的发展及应用，用户的数字足迹为有效展现城市人口流动的轨迹和时空聚集状态提供了便利，弥补了传统城市调研和空间规划的缺陷。本文借助百度热力图，并结合ArcGIS，分析了武汉主城区人口在典型日期（工作日和休息日）流动的时空特征。结果表明：人口集聚表现出明显的波动性变化，工作日的波动性强于休息日；出行时间存在着相位差，休息日的滞后性和后延性更强。人群活动的时间节律主要受规则性和自由性活动的控制。在空间上，工作日与休息日高集聚的场所有一定差异，工作日以商业中心、交通枢纽和就业中心为主，表现出非常明显的工作指向性；休息日则指向传统的购物中心、大型交通枢纽和新兴城市综合体。因此，需要对武汉市城市总体规划中的部分“中心”进行优化。

Spatial-temporal Characteristics of Urban Population Aggregation Based on Baidu Heat Map inCentral Areas of Wuhan City

With the development and application of LAD and LBS, the digital footprint of theuser has provided convenience for effectively displaying the trajectory of urban population flowand the spatio-temporal aggregation, which makes up for the shortcomings of traditional urbanresearch and spatial planning. With the help of Baidu heat map and ArcGIS, this paper analyzesthe temporal-spatial footprint of population flow of the central city of Wuhan City. The resultsshowed that: the population agglomeration showed obvious fluctuation, but the fluctuation ofworking days was stronger than that of the rest days, and the activity track was highly consistentwith the commuting rhythm, while the rest day was more stable. There is a phase differencebetween working days and rest days; the time of population flow and accumulation is earlierthan the rest; the afternoon, the day of rest, the time of population flow and focus lag behindthe working days. Whether on weekdays or on the day off, the concentration of the morning islow, and the concentration of people in the afternoon and evening is higher, and is much higherthan that in the morning. In the spatial footprint, the working day and the rest day are gatheringtogether the spatial position approximately same, the working day mainly is the commercialcenter, the transportation hub and the employment center, displays the very obvious workdirection. Days off point to traditional shopping centre, large transportation hubs and emergingurban complexes.