Abstract
Urban vitality provides an important basis for evaluating urban development and spatial balance. In the era of big data, the quantitative analysis of urban vitality has become a research hotspot in the field of urban sustainability and planning research. However, time variation characteristics are often neglected, which leads to one-sidedness in the pattern analysis of urban vitality. In this paper, a method for extracting vitality areas and integrating spatiotemporal features clustering is proposed. The method is used to divide urban space into multiple vitality areas scientifically. The spatial and temporal distribution patterns of urban vitality areas are found, and the driving factors of various vitality patterns are analyzed by combining points of interest (POI)-based land use characteristics. To illustrate this method, this paper takes Nanjing city as an example. One week’s worth of mobile phone data indicated that Nanjing has 10 and 8 vitality areas on weekdays and weekends, respectively. The spatial and temporal distribution patterns of the vitality areas and their correlation with land use were analyzed, which proved that POI density and entropy have strong correlations with urban vitality.
Highlights
The concept of “urban vitality”, which can be considered to be “the intensity of people’s concentration”, was proposed by Jane Jacobs in “The Death and Life of Great American Cities” [1] and is often regarded as the raw power and energy within a city [2]
Limited by data and methods, most of the current research has analyzed and evaluated the “space vitality” of a city with the method of static statistics of the number of people in a fixed period, or they have analyzed the dynamic changes of spatial vitality based on a time snapshot sequence
There has been a lack of an effective method to solve the problem of spatiotemporal pattern analysis of urban vitality
Summary
The concept of “urban vitality”, which can be considered to be “the intensity of people’s concentration”, was proposed by Jane Jacobs in “The Death and Life of Great American Cities” [1] and is often regarded as the raw power and energy within a city [2]. Urbanization has been growing rapidly in developing countries, and many metropolises have stepped into the concentrated outbreak period of “urban disease” [5,6]. The rapid expansion of population and the serious shortage of urban infrastructure capacity have brought traffic congestion, environmental pollution, disorder, low efficiency of operation, and other problems. These problems seriously restrict the sustainable development of cities. The study of urban spatial and temporal vitality patterns provides a new way to alleviate the problem of blind urban expansion and unbalanced resource allocation
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