Why the rosettes image may not be a map at all

[Sam G]

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 lines in the center of the large circle forming a hexagon are also arguably similar to the hexagonal "tent" in the central rosette of the VMS diagram.