f57v and the Catalan Atlas

[Anton]

Yes, and this codex is not unique in representing them, here's another one for example: You are not allowed to view links. Register or Login to view.

But those diagrams do not feature the "polar star" (or sun?) symbol, I saw it somewhere else...

(offtopic) BTW, the Cod. Sang. 827 (Lake Constance, early 15 c.) mentioned above is interesting in two other respects:

1) "detailed" T-O map (p. 270), it makes sense to try to match it against the VMS Rosettes
2) heavy abbreviation featuring many Voynichese-like shapes, such as k, s (both long and short), sh...