Rosettes foldout: cardinal directions?

[Koen G]

I was thinking that even if we just consider the suns and their apparent path, the castle as south is the most logical.

Searcher touched above on the point of implied movement. If we look just at the suns, they both face the way they are moving, resulting in the circular motion we would expect of a body in orbit. No matter which direction you put on top, the sun cycles clockwise.

   

The arrows point the way the sun moves. One of the colors describes its path through the southern sky, that is, shining upon the Earth. In Searcher and Diane's view, this would be the blue path, while I argue in favor of the green path. All individual buildings (ignoring those parapets/cliffs things that surround the whole foldout) are found within the red E-S-W triangle. Castle, "temple", little houses, portals... The Sun wheels over them, then sets at the "temple". 

The direction the suns face supports this movement as well. We know the sun wheels clockwise, so the top sun must scale the horizon, which is indeed where it is looking at. And the bottom sun must move towards the weird pattern beneath it (Ocean's waves?) which is where it is facing.