Mobile Guardian: A novel positioning and monitoring system for outdoor special users based on GPS

Different to traditional vehicle positioning and navigation systems, requirements of positioning operations for individuals are always contingently, and it pays more attention to making navigation devices portable and easy to use. Based on GPS and GSM, a novel positioning and monitoring system for outdoor special users called Mobile guardian is presented in this paper. Through analyzing the structure of GPS data, location-related information such as longitude and latitude of users can be extracted from GPS data stream. The GSM module which supported AT commands is used to transmit these location data and telecommands between users and the monitoring center. And the technology for encapsulating and parsing XML spacial data is utilized for Google Earth to display the detailed geographical information on the screen. Experiments show that the system is effective and could be popularized to family monitoring.