Thank you, that page was chock-full of everything except information. On a side note, why is it always that maps of phenomena that respect no political boundar

Thank you, that page was chock-full of everything except information. On a side note, why is it always that maps of phenomena that respect no political boundaries, tend to be cut off at the borders? It's absurd to me, and it happens so often. Even if you're an American, and only care about American Americanism, you'd still benefit from seeing how things play out beyond these arbitrary borderlines.