Global Positioning Systems / Location Based Services Using GPS systems to improve the safe operation of vehicles Robert Lorimer Strategies for Merging GPS and Terrestrial Geodetic Network Iraj Jazireeyan Navigating with RFIDs Ramesh Srinivasaraghavan GIS as a tool for Mobile Tracing and Routing Dr. Rajiv Gupta An Efficient Algorithm Based on Kalman Filters to Improve Positional Accuracies of GPS Reciever Divy Jain Personal Navigation Technologies J Keshu Kumar