I think it looks pretty good. The only thing I'd do is get rid of the (I think?) plains/grass icons. If you've got green landscape with nothing on it, I think most people will know that it's plains and/or grassland without cluttering it up unnecessarily. That way when you add your settlements and all the text, it won't overload the map. The only time I'd go against my own advice is if it's a very large area and there won't be hardly any text and/or special icons on it - in that case you might need to fill up some empty space to balance things out.