This paper proposes designing of the Global Positioning System (GPS) in a very simple and efficient way for navigation, positioning and tracking. This system is designed to provide information about location based services along with the emergency services. The presented GPS based hand held terminal is designed using hardware components like Microcontroller 89C52 and GM 48 GPS Receiver. We can carry this handy device anywhere there is no need to connect it to PC all the time for tracking. The main feature of this Navigation System is its ease of use along with the compact size and visual display of results using PC and LCD display. Subsequently a small computer interface can be added to the system to provide download of location details and superimposing the results on to a GIS mapping system to provide On-Line tracking.

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Context-aware services Emergency based services Location based services