The cannibals in the picture on the left are called Essedones. They are located in Scythia, an area north and north-east of the Black Sea. The caption on the map says that they feast on the flesh of their dead parents.
Mappae mundi present a very Eurocentric view. Their makers implied that Europeans were the only civilized people by filling other parts of the world with monsters and savages. This influenced European attitudes to people from other countries. When Europeans went to Asia, Africa, and the Americas they were all too ready to dismiss the peoples and cultures they encountered as primitive or evil.