Why the rosettes image may not be a map at all

[MarcoP]

I initially could not understand what Searcher's post had to do with the subject of the thread, but now I can see some connections (even if I don't know if they are the intended ones).

The "Marciana" diagram includes a T-O map at the top right (as well as another on the left).

The diagram from  Arundel MS 501 has the same structure as the MS Ludwig XII 8 weekday diagrams: morning on the left, midday at the top, evening at the right, night at the bottom, split into the 24 hours.