"Location-Based Services provides a comprehensive sweep through an exciting new area of computing. It's a detailed and powerful primer for understanding the deployment of LBS. - Xavier Lopez, Director, Spatial, Location, and Network Technologies, Oracle Corporation"Location-Based Services gives a comprehensive panorama of a multi-disciplinary field. It is an excellent source of information for practitioners and researchers who are facing the numerous technological challenges raised by location-based services.- Serge Abiteboul, Senior Researcher, INRIA and Scientific Advisor, XylemeLocation-based services (LBS) are a new concept integrating a user's geographic location with the general notion of services, such as dialing an emergency number from a cell phone or using a navigation system in a car. Incorporating both mobile communication and spatial data, these applications represent a novel challenge both conceptually and technically. The purpose of this book is to describe, in an accessible fashion, the various concepts underlying mobile location-based services. These range from general application-related ideas to technical aspects. Each chapter starts with a high level of abstraction and drills down to the technical details. Contributors examine each application from all necessary perspectives, namely, requirements, services, data, and scalability. An illustrative example begins early in the book and runs throughout, serving as a reference.

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