Abstract
Understanding urban dynamics and large-scale human mobility will play a vital role in building smart cities and sustainable urbanization. Existing research in this domain mainly focuses on a single data source (e.g., GPS data, CDR data, etc.). In this study, we collect big and heterogeneous data and aim to investigate and discover the relationship between spatiotemporal topics found in geo-tagged tweets and GPS traces from smartphones. We employ Latent Dirichlet Allocation-based topic modeling on geo-tagged tweets to extract and classify the topics. Then the extracted topics from tweets and temporal population distribution from GPS traces are jointly used to model urban dynamics and human crowd flow. The experimental results and validations demonstrate the efficiency of our approach and suggest that the fusion of cross-domain data for urban dynamics modeling is more practical than previously thought.
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Acknowledgements
This work was partially supported by JST, Strategic International Collaborative Research Program (SICORP); Grant in-Aid for Scientific Research B (17H01784) and Grant in-Aid for Young Scientists (26730113) of Japan’s Ministry of Education, Culture, Sports, Science, and Technology (MEXT). We specially thank ZENRIN DataCom CO., LTD for the provision of GPS data and their support, and Nightley Inc. for geo-tagged tweets.
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Satoshi Miyazawa is a PhD student of the Department of Socio-Cultural Environmental Studies at The University of Tokyo, Japan. His research interests include human mobility, LBSN, data mining, and machine learning.
Xuan Song received the BS degree in information engineering from the Jilin University, China in 2005 and PhD degree in signal and information processing from Peking University, China in 2010. From 2010 to 2012, he joined the Center for Spatial Information Science, The University of Tokyo, Japan as a postdoctoral researcher. In 2012 and 2015, he was promoted to project assistant professor and project associate professor at the same university. His research areas are mainly in artificial intelligence and data mining.
Tianqi Xia is a master student of the Department of Socio-Cultural Environmental Studies, The University of Tokyo, Japan. He received his BS degree in geographic information science from Wuhan University, China. His research interests include spatial data mining, data analysis and intelligent transportation systems.
Ryosuke Shibasaki is a professor at the Center for Spatial Information Science, The University of Tokyo, Japan. His research interests include satellite and airborne remote sensing, tracking technologies, geospatial information gathering and integration among heterogeneous systems, and common service platforms for geospatial information.
Hodaka Kaneda is an employee of ZENRIN-Datacom CO., LTD, Japan. His work is to deal with GPS data and to supply “Konzatsu-Tokei (R)” Data.
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Miyazawa, S., Song, X., Xia, T. et al. Integrating GPS trajectory and topics from Twitter stream for human mobility estimation. Front. Comput. Sci. 13, 460–470 (2019). https://doi.org/10.1007/s11704-017-6464-3
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DOI: https://doi.org/10.1007/s11704-017-6464-3