Having had a look for comedic maps of Devon on the Internet I find them somewhat lacking. So I have just knocked up this one, I am am failry happy with the picture but it is not a great shape for a logo. Something that fits within a square is better.
Most google of face book logo fit within a sqaure area typoically recommended at 600 x600 pixels for example. So an oblong logo is sub optimal- back to the drawing board.