Well when I read Been There's idea of flat earth, I couldn't help but think of this scripture. Mainly because I know he gives thought to UFO's and because the flat earth diagram is shaped like a domed one, I figured he believes we are living in one.
This scripture sounds like something almost as wide as the United States coming down from heaven...a cube shaped city which was measured for size and in great detail. It has an outside area where the nations are.