I have updated the map to have town names.

-Ecrin is the larger Orthian village. It's basically an anthill in the dessert.
-Blencalgo is the smaller Orthian village. It's above ground among red stones, built around a rather large oasis.
-Seameet is the terrestrial part of the Hydrenian colony. The rest of it is just off shore.
-Doncaster is [i]the[/i] Aerian village. It's carved into the mountain side just above a small valley with a wide river.
-Nobody has ever been to Sharnwick, so what's there is unknown.

Aerians and Hydrenians don't like to split their cultures, where as the Orthians had a small civil war in the town of Blencalgo, so a large chunk of the population left.