Gps and navigation using lego mindstroms 2.0 NXT

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.

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.

Hope that helps!

Here’s another picture.