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    Mobile-web-base volunteered geographic information application and geometric accuracy analysis for traffic accidents
    (International Society for Photogrammetry and Remote Sensing, 2020) Sevinç, Hacer Kübra; Karas, Ismail Rakip; Demiral, Emrullah
    The users can contribute to geographic information through platforms such as Wikimapia and OpenStreetMap. They can also generate data by themselves with their applications in cyber worlds like Google Earth. This study is primarily designed to be a guide regarding Volunteered Geographical Information (VGI) and to evaluate the geometric accuracy of data collected from volunteers on application. The main purpose of this study is to present basic information about Volunteered Geographical Information (VGI), why users are tending to use VGI, the accuracy of the data entered by the user, to examine the examples of use in various fields, to learn about geographic information systems and to compare this phenomenon and also by developing a VGI application to examine the similarity between the actual data and the data collected from volunteer users. A mobile and web-based application have been developed to collect traffic accident data from volunteer users. The geometric accuracy analysis was performed by comparing the data collected with this application with the data obtained from the General Directorate of Security. © 2020 International Society for Photogrammetry and Remote Sensing. All rights reserved.