Location based information systems : developing real time tracking applications The book provides a comprehensive introduction to developing location based information systems based on GPS enabled cellular phones. It describes all of the components needed to develop a location based information system and provides readers with the opportunity to build an example application. Chapters cover obtaining a users location storing and retrieving data communicating over a network Java ME Web services and visualizing data. In the theoretical chapters the authors address location provider architectures the hardware and software architecture of a mobile phone the Java ME platform and other important programming aspects for mobile phones