Nav using GPS and the Prop: What to Expect?

http://forums.parallax.com/forums/default.aspx?f=25&p=1&m=3...
Fuente: Parallax

I'm slowly making progress on my project: the PropBot. This is a robot I built just to study the Propeller. I feel strongly about having a project as a reason to learn anything. The objective of this robot has been to make an autonomous robot that navigates around the Parallax building parking lot via four waypoints, avoiding any parked cars or square curbs along the way. Ideally, I'll sit in my office and watch the bot lap the office every two minutes or so till the battery dies...