Nice project tomosawison. I like what you've created so far. I have one suggestion. You've written that you wish to convey a feeling that the map has been created somewhere in the 1000-1300 a.d.. I think that it would be nice to recreate historically accurate coastlines to make the map more authentic. As far as I know Hel Peninsula wasn't a peninsula at all during the period you are interested in, but rather a string of islands. It might be a good idea to include this fact in your final map. Just a suggestion of course. Good luck with your project!