Study on a Social Media GIS to Support the Utilization of Disaster Information : For Disaster Reduction Measures from Normal Times to Disaster Outbreak Times

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  • 災害情報の活用支援を目的としたソーシャルメディアGISに関する研究 : 平常時から災害発生時における減災対策のために
  • サイガイ ジョウホウ ノ カツヨウ シエン オ モクテキ ト シタ ソーシャル メディア GIS ニ カンスル ケンキュウ : ヘイジョウジ カラ サイガイ ハッセイジ ニ オケル ゲン サイ タイサク ノ タメニ

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Abstract

This study aims to design, develop, operate and evaluate a social media GIS (Geographical Information Systems) specially tailored to mash-up the information that regional residents and local governments provide to support information utilization from normal times to disaster outbreak times in order to promote disaster reduction. The conclusions of this study are summarized in the following three points. (1) Social media GIS, an information system which integrates Web-GIS and SNS in addition to an information classification function into a single system, was conducted in Chofu City, Tokyo. The social media GIS used a design which showed information as semitransparent circles depending on its present location data and contents. This made it propose an information utilization system based on the assumption of disaster outbreak times when information overload happens as well as normal times. (2) The social media GIS was operated for regional residents who are more than 18 years old for seven weeks. Although about 52% of the users were in their twenties, about 36% were aged forty or above. Users submitted and inspected disaster information using both PCs and mobile information terminals. (3) The system was evaluated based on the results of a questionnaire survey to users, an access survey using log data during operation and an analysis of the submitted information. The questionnaire survey showed the usefulness of the system in terms of its operability especially regarding specific functions, and the possibility to provide disaster information mainly for mobile information terminals. Additionally, since it also showed effects of use, we expected that systems will be used according to their purpose. The access survey showed that users continuously accessed the system and 181 pieces of disaster information were distributed throughout the whole city of Chofu.

Journal

  • Socio-Informatics

    Socio-Informatics 3 (1), 17-30, 2014

    The Society of Socio-Informatics

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