Tomomichi Hayakawa

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Volunteered Geographic Information (VGI) has been receiving attention in the GIS community. The Open Street Map Project (OSM), which is one good example of VGI, includes the participation of worldwide users. OSM is creating a world geographic database that can be edited by anyone. Its activities have high social significance. We are researching the(More)
This paper shows that OpenStreetMap (OSM) played a useful role during the Great East Japan Earthquake of 2011. OSM, which provides free geographical information, is sometimes referred to as a map version of Wikipedia. Its data additions, updates, and corrections are made available by its participants. We compare the data before and after the Great East(More)
The government policies "Government 2.0", which are aimed at harness collaborative technologies to create an open-source computing platform in which government, citizens, and innovative companies can improve transparency and efficiency have been adopted in several countries. One of the their goals is sharing local problems and information's between citizens(More)
In the rivers area, it has become frequent problems with illegal dumping, flood, inundation, and damage. We need the support and understanding of the problems quickly. Future measures also require. River basin is a wide range. Only the river administrator is difficult to perform adequate monitor and response. River Information Management System was(More)
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