| @Meirjin: I agree that it would be good to mention the formula used in the notes, but I don't think using p^2 favours larger countries unfairly --- it makes it scale-invariant, so that two countries that are the same shape but different sizes will get the same p^2/A. So (speaking as a math geek) I think p^2/A is an excellent way to rank them. The only difficulty is that perimeter of a complex shape depends somewhat on what scale it's measured at; but that's beyond what we Sporclers can control, that's something professional geographers have to deal with :-) |