Jerry is correct. Rappan Athuk and the Borderland Provinces are all located on our Sinnar Coast region map as are Lost City of Barakus, Cults of the Sundered Kingdoms, all of the old Hawkmoon modules from Necromancer Games, a bunch of the adventures in Quests of Doom Vol. 1 and 2, Trouble at Durbenford (more or less), The Mires of Mourning, and many other titles from Frog God Games and Necromancer Games.
Tsar, on the other hand, is about midway up the Gulf of Akados region map which is heavily featured in Sword of Air. The Gulf of Akados region includes not only Slumbering Tsar and the many disparate locations of Sword of Air but also covers Bard's Gate, the Stoneheart Mountains (including the upcoming Mountains of Madness), Stoneheart Valley (which includes the old NG classics The Wizard's Amulet, The Crucible of Freya, and Tomb of Abysthor), the old Grey Citadel modules from NG and FGG, and the southernmost extremes of the areas covered in the recently completed Northlands Saga Kickstarter.
The Sinnar Coast and Gulf of Akados do align together with the Gulf of Akados map's southern edge meeting up with the Sinnar Coast map's northern edge (though they are slightly offset to cover more landmass and less open water of the gulf).
Both the
Sinnar Coast poster map and the
Gulf of Akados poster map are available for sale on the Frog God Games website, and I believe we still have vellum copies of one and maybe both of them as well. Both poster maps are also available as add-ons to the
Borderland Provinces Kickstarter.