A GML-based Mobile Device Trace Monitoring System Eun-Ha Song 1 , Sung-Kook Han 1 , Laurence T. Yang 2 , Minyi Guo 3 , Young-Sik Jeong 1 1 Department of Computer Engineering, Wonkwang University 344-2 Shinyong-Dong, Iksan, 570-749, Korea {ehsong, skhan, ysjeong}@wonkwang.ac.kr 2 Department of Computer Science, St. Francis Xavier University Antigonish, NS, B2G 2W5, Canada lyang@stfx.ca 3 School of Computer Science and Engineering, Aizu University Aizu-Wakamatsu, Fukushima-ken 965-8580 Japan minyi@u-aizu.ac.jp Abstract. Recently, the demands on information services have been increasing significantly. This is mainly due to the popularization of computer and mobile telecommunication devices and the rapid improvements on wireless communi- cation technology. Specially, information services and their corresponding management for mobile devices, such as Location Based Service (LBS) and Telematics, become more and more important. However, the standard for geo- graphical space data has not been finalized. Many commercial monitoring sys- tems are using their own independent geographical information without making them compatible to others. Much efforts and resources have been wasted on managing and operating those different monitoring systems’ geographical In- formation System (GIS) databases. Accordingly, a standard format called GML, based on the most commonly used geographical data format such as DXF, DWG and SHP, has been emerged. In this paper, our work on GML’s visuali- zation in Trace Monitoring Systems (TMS) is described fully. The details on how to trace and manage data moving among different mobile terminals are presented as well. 1 Introduction Geographical Information Systems (GIS) has become one of the key technology to improve and shape our future living environment, even our social life. It is an ad- vanced information system by systematically computerizing all geographical informa- tion such as the configuration of the ground, buildings, roads, rivers, bridges, geo- logical structure, nature of the soil, and the environment of sea. It can use these com- puterized data for efficiently managing national land, environment, disasters, business activities, our daily life and so on. Furthermore, the realization of wireless connec- tivity is bringing fundamental changes to telecommunications and computing and profoundly affects the way we compute, communicate, and interact. It provides fully distributed and ubiquitous mobile computing and communications, thus bringing an