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Articles

Community-Level Social Topic Tracking of Urban Emergency: A Case Study of COVID-19

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Pages 1926-1941 | Received 24 May 2021, Accepted 17 Jan 2022, Published online: 18 May 2022
 

Abstract

During the outbreak of COVID-19 in Wuhan, the public used Weibo to acquire information, express emotions, and seek help at a historic and unprecedented scale. This situational information is valuable for authorities to initiate emergency policies and protect people’s health. Although event detection and situation awareness during COVID-19 using social media data have been investigated in recent studies, the spatiotemporal evolution patterns of social topics during COVID-19 at the community level are still limited. To address this limitation, this study developed a methodology to explore the dynamics of social topics under the influence of COVID-19 at a community level in Wuhan using geotagged Weibo posts. The disease-related topics exhibited the spatial variations in different urban communities and reflected the dynamics of public attention. Moreover, we used the reported COVID-19 case data in Wuhan and geotagged Weibo posts in Beijing to validate the effectiveness of the proposed methodology. These findings help to track social topic evolution at the community level and gain a better understanding of the spatial variations of public attention during urban emergencies.

武汉爆发COVID-19期间, 公众通过微博获取信息、表达情感和寻求帮助的规模达到了史无前例的程度。这些信息对政府启动应急政策、保护人民健康很有价值。近期研究探讨了COVID-19期间根据社交媒体数据的事件检测和态势感知, 但很少研究COVID-19期间社区层面的社会话题的时空演变模式。为了解决这一局限, 通过具有地理标识的微博, 文本在武汉社区层面上探索了COVID-19影响下的社会话题的变化。与疾病相关的话题, 在不同城市社区具有空间差异性, 也反映了公众关注点的变化。此外, 利用武汉的COVID-19报告病例数据和北京的地理标识微博, 我们验证了该方法的有效性。这些发现, 有助于跟踪社区层面上的社会话题演变, 能更好地理解城市突发事件中公众关注点的空间变化。

Durante el brote de COVID-19 en Wuhan, la gente usó Weibo para obtener información, expresar sus emociones y buscar ayuda, a escala histórica y sin precedentes. Este tipo de información es valiosa para que las autoridades pongan en marcha políticas de emergencia y protejan la salud de la gente. Aunque en recientes estudios se ha investigado la detección de eventos y la conciencia de la situación durante el COVID-19, a partir de datos de los medios sociales, los patrones de evolución espaciotemporal de las temáticas sociales durante la pandemia, al nivel de comunidad, siguen siendo limitados. Para enfrentar esta limitación, este estudio desarrolló una metodología para explorar la dinámica de los tópicos sociales bajo la influencia del COVID-19, a nivel comunitario, en Wuhan, mediante el uso de mensajes Weibo geoetiquetados. Los temas relacionados con la enfermedad mostraron las variaciones espaciales que se presentaron en diferentes comunidades urbanas y reflejaron la dinámica de la atención pública. Aún más, usamos los datos de los casos de COVID-19 en Wuhan, y los mensajes Weibo geoetiquetados de Beijing, para validar la efectividad de la metodología propuesta. Estos hallazgos ayudan a trazar la evolución de los temas sociales a nivel comunitario y a obtener una mejor comprensión de las variaciones espaciales de la atención pública durante las emergencias urbanas.

Acknowledgments

The authors appreciate insightful comments and suggestions from anonymous reviewers and Dr. Ling Bian.

Additional information

Funding

The work is supported by the National Natural Science Foundation of China (Grant No. 42101464) and Open Research Fund Program of LIESMARS (Grant No. 21I03).

Notes on contributors

Mingxuan Dou

MINGXUAN DOU is currently a PhD Candidate in Geographic Information Systems at State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China. E-mail: [email protected]. Her research interests include urban modeling with human mobility data, urban transportation, and social sensing.

Yanyan Gu

YANYAN GU is currently doing his postdoctoral research in the Department of Urban Informatics, School of Architecture and Urban Planning, Shenzhen University, Shenzhen 518060, China. E-mail: [email protected]. His research currently focuses on complex network analysis, urban planning, and human mobility.

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