This document discusses location based augmented reality services. It begins by defining augmented reality as a technology that provides a greater view of objects by overlaying digital information on the real world. It then discusses using augmented reality and GPS together to create location based augmented reality services. These services could provide information to users about nearby locations and objects based on their current position. The document provides several examples of potential location based augmented reality applications and services including virtual guides, advertising, and alarms or notifications triggered by a user's location. It also discusses some of the technical aspects involved in creating such services like tracking user position and generating augmented views of real world locations and objects.