Is that possible that i enter the latitude & longitude of the place and the robot go there automatically using dgps. if possible please give guidelines & a way to proceed in programming.
Yes, this is very possible! We have a two blog posts that would probably help you get started:
This is on geocaching, which gives you the basics for using the GPS to navigate. http://www.dexterindustries.com/blog/2010/11/24/geocaching-for-einstein/
This is on the SARG: Simple Autonomous Robot GPS (SARG) where we have a video, some example programs, and a howto of a robot moving through a parking lot. http://www.dexterindustries.com/blog/2010/11/22/dexter-industries-simple-autonomous-robot-gps-sarg/
Hope that helps!
Here’s another picture.