Gran Master Maps
After the cruch of the Meteor Heinz, the tectonic plates moved and the Planet Earth shapes like that...
See the differences between before Meteor Heinz and after Meteor Heinz...
That's how the Earth is divided: Gran Land at west of the Strait of Pacific and New America at the east... the Atlantic Ocean is now the biggest one and at the center is the Knocheninsel (Island of the Bones) that is the place where the hybrids are.
Curiosity: The Atlantis is a small island because the "true" country called Atlantis is a big island under the Atlantic ocean.