Just when the world thought we had enough data--proliferated via the Web--we now have the enormous amount of dynamic data that will be generated by GPS systems and RFID tags. Driven by trends in consumer electronics (the use of GPS-equipped devices such as PDAs, GPS in automobiles, and in mobile phones) as well as the trend in companies and retail stores to track their products (using RFID tags), this book focuses on data management techniques for the huge volumes of changing data these systems will generate.