Utilizing Geo-Social Media as a Proxy Data for Enhanced Flood Monitoring
Social media plays an important role in disseminating spontaneous information during natural disasters/emergencies. It is a crowdsourcing platform, capable of complementing and supplementing remote sensing data in disaster mapping. Continuous monitoring of disasters such as floods from pre-stage to...
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Published in: | Journal of the Indian Society of Remote Sensing Vol. 49; no. 9; pp. 2173 - 2186 |
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Main Authors: | , , |
Format: | Journal Article |
Language: | English |
Published: |
New Delhi
Springer India
01-09-2021
Springer Nature B.V |
Subjects: | |
Online Access: | Get full text |
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Summary: | Social media plays an important role in disseminating spontaneous information during natural disasters/emergencies. It is a crowdsourcing platform, capable of complementing and supplementing remote sensing data in disaster mapping. Continuous monitoring of disasters such as floods from pre-stage to post stage is essential and geo-social media can attain it. The present research proposes a robust architecture to develop a social media-based near-real time flood monitoring system. In addition, our research article also emphasizes the efficient methods to process, analyse and explore multiple data dimensions of social media. A prototype model was prepared and tested on the tweets of Chennai floods 2015 to demonstrate social media potential in disaster monitoring. We implemented Natural Language Processing and Supervised Machine Learning in data processing and analysis segments of the framework by assembling various open source python libraries to develop the prototype. Initially, we built the required tweet corpus and performed pre-processing steps on it. Later, the collected tweets were geocoded with the place names available in the tweets and classified them into various flood topic related classes using Naive Bayes classifier. Subsequently, the tweets showcasing the flood condition were determined to generate a point map and a point density map to identify the flood hotspots. We verified our results with openly available 2015 Chennai flood map that is generated using remote sensing images and found positive outcome. A prototype web portal was developed to publish the results from above model as web maps. Furthermore, the portal would prove to be useful as a source for disseminating information to the public. The results prove that the proposed framework is evidently supportive in establishing a near real time monitoring system during emergencies. |
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ISSN: | 0255-660X 0974-3006 |
DOI: | 10.1007/s12524-021-01376-9 |