just a question

i just  got a new couch and its much bigger then my last one and closer to the floor is there a way to have it remap my house  

Interested in knowing this answer

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All I would do is let the robo do a regular cleaning. It will notice an extra space and it would re map it self.

Yes, you can remap it or like another user suggested just put in on clean and it will just adjust to the new furniture. I move furniture around and only once had to remap because it just kept missing a small area of the room. Most of the time it's fine. Don't forget to back up your maps even though they are saved. You can also remap it and save it as another floor or area so you don't lose your original map