turtlesim is probably not the right choice, since it doesn't do any of the
things you'd want -- collision detection, sensing, etc.  turtlesim is really
just a tool developed for learning ROS.  Something like Stage (
http://www.ros.org/wiki/stage) is a better choice.

Josh

On Tue, Jun 15, 2010 at 4:22 AM, Narasimhan Rajagopal <
narasimhan1990@yahoo.co.in> wrote:

> hi. my project is to create a simple maze and make an autonomous robot
> solve it.
> i'm planning to adapt the turtle sim as my base package.
>
> how to create a custom map(or arena) rather than the default plain one?
>
>
>
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