more than six years of R & D in the location-based information system (LBIS) as well as their participation in defining the Java ME Location API 2.0, Location-Based Information Systems: Developing Real-Time Tracking Application provides information and examples for creating real-time LBIS based on GPS-enabled cell phones. Each chapter presents an example of real-time tracking system that can generally be easily adapted to target each application domain and can incorporate other sensor data to create a system of "participatory sensing" or "human-centric sensing." This book covers all the components needed to develop LBIS. Exploring this novel technology, Location Based Information Systems describes the technical components needed to create location-based services with an emphasis on property rights, freely available solutions that work in different technologies and platforms.