Rosettes and Revelations Pt.1: The Holy City - Koen Gheuens and Cary Rapaport

[Mark Knowles]

On the other hand, if waves are emanating from the rosettes, the waves would be moving away, depicted like a cloud band and the hatching lines as rays of light would further confirm this interpretation.

While some rosettes do have illustrations that can be interpreted as geographical representations, other rosettes seem to be lacking. Their patterns are quite abstract. What's important here is the text, the twice-marked band in the central rosette.

It is true that the waves are normally drawn emanating outwards from the causeways(not really the case in the bottom left rosette), but I take that as a stylistic consideration. You could make similar critical arguments about the directions of waves on other known maps.