Rapsfeld auf Usedom, Mecklenburg-Vorpommern, Eastern Germany. Usedom is an island in the Ostsee (Baltic Sea). Since 1945, it is split between Germany and Poland. About 80% of the island belongs to the German district of Vorpommern-Greifswald. The eastern part and the largest city, Świnoujście (German: Swinemünde), are part of the Polish West Pomeranian Voivodeship.