Nice work! I don't know anything about the Autorealm program you're talking about, so I don't know what abilities and limitations it may possess, but my primary suggestion would be to maybe add a pixel or two of thickness to your land boundaries. Just my personal preference, but the single pixel line makes it look kind of wispy and spidery.

Also, I notice that you seem to have removed the forests entirely. If this is just due to it being a WIP, ignore this comment, but try bringing some forests back. I love big forested regions on a map. They have a sense of mystery to them.