Karlsburg and west of the Tigeria river is still Aldermark. The frontier between Aldermark and Royin, Cities of the Wastes and Andrastus (West of Aldermark), is not shown on the map, and the exact location of those kingdoms is not known either. If you need them in your campaign, it’s up to you.
The emplacement of the Gap is shown on the map, however. It’s in the south-west corner of the map page 372, the giant cliffs. The sea at the east flows in the Gap at high tide, but it’s far from enough to fill it (see page 364). Dar is south of that.
The location of Barta is known. It is east of Aldermark, and you can reach it through the pass at Skydagger keep (see page 427). So the northeast corner of the map is Barta. Presumably, Barta borders Panya.
Zemya is in the north, in the mountains. It probably borders Barta, maybe Aldermark? Yours to decide. Or wait for the 2nd and 3rd campaigns!
The exact location of Or is not known. Is it east of Barta, east of Panya (or both), south of Panya? We don’t know.
Also, the exact location of the original land of the Old Empire and of its capital is not known.