Well, since it is a different world, there's no reason that they can't have a different aesthetic about their maps compared with the real world in the same tech level, so don't worry about it being "authentic" in that way. I would, however, rough up the text a little: there's no way the font would be printing that perfectly. Of course, as long as it's on separate layers, that can be done near the end. Expect to hear from the River Police about your various lakes with multiple outlets, although I suppose they could be inaccuracies in the map. I don't much care for the large font. I really like the way you've represented the terrain; it is simple, stylish, and clear.