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I am assuming this is illegal: You set up two or three radio transmitters, on different frequencies (maybe not radio, but something that wouldn't interfere with the OI stuff) and have the bot able to read each on, and compute a distance based on signal strength. Having told the bot where the transmitters would be, then the robot would know its location with absolutely no error due to wheel slippage or inaccurate sensors . . .
However, I am assuming that the transmitters would be illegal,
what he is asking is can you have something on the robot that reads some existing feild without creating or modifying it.
Hell, thats what a compass does, I know there was a team that read the earth's magnetic feild last year or something.
So maybe, yes, but I wouldn't push your luck and create a feild of somesort over the playing feild. I doubt GPS is feasible, but you could probably use a compass.
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