In the previous photo (open view to the East) you can see how there are big long open valleys. From the air you can see that the dunes create a pattern.
Apart from being able to see long open valleys you really do not get this sense of organization on the ground..at least I don't.
Even the valleys don't seem to go on for ever. The ground is uneven enough to block the view that would go on for ever. You can also see in the photos that some smaller ridges cut them across. On the ground those are tall enough to give the impression that you are in a "basin" more than in a mile long "valley".
