Web based multi participant spatial data entry in crime mapping

Aydın, Yunus Emre
Geographic Information Systems (GIS) development in crime analyses encourages sustainable platforms within various types of users and decision makers. Since patterns of crime incidents are pinpointed and analyzed in crime mapping, accurate data acquisition must be considered as a key concept to construct a successful GIS application. Ankara City Police Department utilizes a semi-automated geocoding interface in which crime incidents including offenders and victims are pinpointed. However, this system has some accuracy errors during geocoding, because in this process point based data are located in the center of street line segments, and this may cause position errors up to 200 meters. Therefore, additional data editing must be done to reach a reasonable accuracy. In this context, real time data editing provides opportunity to gain time instead of expanding the GIS database within received hardcopy files from each police station. As the crime incidents occur daily, online editing must be used to maintain such an accurate and efficient spatial database. In this study, for effective and accurate geocoding, a Web based data acquisition method is proposed. This online entry system enables real-time editing for GIS repository. In this way this study aims to provide a fast and reliable data acquisition system by constructing a multi participant platform enabling online data entry from each police station.


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Citation Formats
Y. E. Aydın, “Web based multi participant spatial data entry in crime mapping,” M.S. - Master of Science, Middle East Technical University, 2006.