Along the Baltic sea trough Germany and Poland

Hi!

I consider to bicycle from Norway, via boat to Denmark to Germany, and along the Baltic sea to Poland / Gdansk, boat to Sweden and bicycle back to Norway.

I have decided where to bicycle in Denmark and Norway, but is a bit uncertain about the rest. I know it is a route along the baltic sea in Germany, I consider to buy maps from ADFC that covers the baltic sea. After that I don't know. Do you have any suggestions where to ride in Poland?

Thanks,

Erling