The way of square

The map here to the left shows the city of Trixnix/Prixnix, thinking of it as square.  The 12 portions surrounding it are the walls, where 3 are turned to the north, 3 are turned to the east, 3 are turned to the south, and 3 are turned to the west.

When in revelation it says the New Jerusalem is a square by the measurement of 12 in each direction, we must think manner and not matter. We must not think volume, as width x length x height. Rather, we must think of reach, as in any direction of width, depth and height.