Abstract
Volunteered Geographical Information (VGI) and social media can provide information about real-time perceptions, attitudes and behaviours in urban green space (UGS). This paper reviews the use of VGI and social media data in research examining UGS. The current state of the art is described through the analysis of 177 papers to (1) summarise the characteristics and usage of data from different platforms, (2) provide an overview of the research topics using such data sources, and (3) characterise the research approaches based on data pre-processing, data quality assessment and improvement, data analysis and modelling. A number of important limitations and priorities for future research are identified. The limitations include issues of data acquisition and representativeness, data quality, as well as differences across social media platforms in different study areas such as urban and rural areas. The research priorities include a focus on investigating factors related to physical activities in UGS areas, urban park use and accessibility, the use of data from multiple sources and, where appropriate, making more effective use of personal information. In addition, analysis approaches can be extended to examine the network suggested by social media posts that are shared, re-posted or reacted to and by being combined with textual, image and geographical data to extract more representative information for UGS analysis.
Highlights
IntroductionUrban green space (UGS) refers to urban land covered by vegetation [1]
This demonstrates that scholars have increasingly studied urban green space (UGS) by using social media data in recent years, or that social media has become more popular
Researchers should carefully clean the collected datasets before analysing them. Social media data such as Tweets can be posted by bots or spammers instead of actual Twitter users, and this may cause data bias and over representativeness, and the sentiments of Tweets can be overestimated by Tweets that were posted by retailers, job advertisements and shopping malls
Summary
Urban green space (UGS) refers to urban land covered by vegetation [1] It is an essential component of urban environmental systems and plays a critical role in sustaining urban natural environments as well as the social systems that use these spaces [2].An increasing number of studies have examined the various benefits of UGS to humans via the interactions between humans and UGS [3]. These include studies of the ecosystem services of UGS [4], the events and physical activities that occur in UGS areas [5,6], the benefits to mental health [2,7], and the accessibility of UGS [8,9]. Researchers have investigated the interactions between UGS and humans and their impacts on visitors’ perception, as well as the benefits to residents’
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