the first link did help by giving some ideas of how to apply GPS.
however, as i'm totally new to using GPS to navigate a robot, guess i'll probably take some time to figure out how to use it.
but still, it helped. thanks.
the robot is for both urban,cross-country terrain(of course i'll start with just urban if it's easier)
obstacle are like buildings, cars..etc for urban terrain and trees, rocks, etc for cross-country.
budget wise, cos i'm army funded, is not so much of an issue cos as long as i can show some results, i can ask for an increase in budget...