Fig. 1.
Study area (Szczecin co-ordinates 53.430° N, 14.529° E): VW West Pomeranian Voivodship (województwo zachodniopomorskie), VP Pomeranian Voivodship (województwo pomorskie)
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.