No text, but a visual code

[Linda]

y drawing those houses over the abyss or that tower without a base, the artist achieves a vertical profile that suggests there is nothing below. This creates the sensation that everything is suspended in space.

I don’t think so. I would assume that all Rosettes are depicted as objects floating in the air.
If you take a closer look, the Rosettes are mainly connected by something resembling rocks; this is clearly visible at the bridge between the Northwestern and Western Rosettes. These cliffs always have clear boundaries separating them from something that looks like waves (so I assume this might be a reference to water, but let’s forget about that for now). There is no flat surface anywhere.

Thank you, I am glad to see someone else sees some of the imagery as resembling rocks, and the varying heights. You are right, the different kinds are confusing and I am not sure if it is waves or merely another type of rock, but definitely I think the blue means water is involved in the scheme of things.

I think the rocks at the moon/sun give a visual clue, transitioning from almost realistic portrayal into the abstract mnemonic blue and uncolored wavy sections.