Hello Everyone,
We are making an Automated Lawn Mower, and we have a question as how can we make the bot move by giving X,Y co-ordinates or make it to go and come from any measured point to a reference point.
What are the components needed along with an Arduino board. Please Help.
Thank a ton !!! 
Impressive.
How far do you need to move the lawn?
Very funny AWOL lol
Just a typo, I bet. Hope.
It seems that this is a pretty complex project. Have you (sunnynanade), worked on other projects using the arduino for very long?
How large is the area to cover?
How large is the "mower"?
What kind of traction does it have?
Do you want it to return to a docking station for recharge when battery gets low?
Do you have deep pockets for this project? (budget).
Differential GPS?
As I understand it Differential GPS will not work everywhere.
Where is the OP located ?
IP address says India.
Thanks a lot for your replies AWOL and jack wp.
The are is an rectangular open garden sized 50ft x 35ft.
Yes the project seems complex and hence we are trying to figure out what all can we do taking into consideration 10 months span and our pockets. 
The size of the mower, its traction, wheels, no of motors and motor capacity for moving and grass cutting are to be calculated.
Yes the mower should be able to return to the charging station when its battery gets low.
Am from India and teaching in an Engineering college.
Thanks a lot again and awaiting your valued replies.
Please note it is spelled MOWER not MOVER.
I assume you are referring to a device that cuts grass rather than a device that lifts the complete sod for laying in another person's garden. Both sorts of device are available
...R
For that size lawn, maybe use 4 lasers/LED (one at each corner) and the mower (robot) can scan for them, and determine its position. Each laser could send a unique pulse. The problem with sunlight will need to be addressed.
If it was on solid ground (concrete) it may be practicle to measure the distance and direction the robot has moved, from the charging station (home), but in grass, and without good traction, I would not suspect this as a solution.
Maybe a combination of the two systems?
I'd go with two or more modulated IR beacons at the edges of the garden, with a rotating turret on the mower that would have IR detectors to locate the beacons. Search the forum for IR using the search box in the upper right of this page for previous discussions.