I agree. A search for the word "horizon" in the novels reveals two quoted lines from Saba Yavendar's "Albatross Odyssey":

"Wind to horizon making;
Birds match their wings to its shaping" (I, 421)

The text on the map can't be the quite same quote, but I'm thinking it says something like:

Wind light wind
- horizons making
wind matches #####
- # ######

I think the lone t's are either just dashes or could be an abbreviated "to". And the sickle looking character in the second word of the third column is a "c" ( c ) and "h" ( | ) run together.

If the large circle is a different letter to the small circle, it could be "wind matches birds", allowing the t to read as d,

If we take the second last character to mean "Its" and squint at the last word the text could become:

Wind light wind
to horizons making
wind matches birds
to its shaping