Also about the possible placement of the continents, Ondu is mentioned in thePlaneswalker's Guide as being in the South-Western quadrant of Zendikar, so in your analogy, it would be South America, not North.
Thanks for this: Zendikar is my favorite plane and I am particularly fond of its geography, since I always liked to play D&D campaigns set in it.
Speaking of geography, just one correction: Zulaport has always been in Beyeen, as per the Planeswalker's Guide. In The Teeth of Akoum, as mentioned, is just inaccurate.
"Zulaport
A transient community of mages, explorers, and artisans, of mixed races and origins, lives on the coast of Beyeen in a town called Zulaport. The economy of Zulaport is believed to be controlled to a powerful vampire named Indorel, who uses a network of goblin, human, and ogre thugs to ensure herself a cut of all the trade that happens around Beyeen."
Speaking of geography, just one correction: Zulaport has always been in Beyeen, as per the Planeswalker's Guide. In The Teeth of Akoum, as mentioned, is just inaccurate.
"Zulaport
A transient community of mages, explorers, and artisans, of mixed races and origins, lives on the coast of Beyeen in a town called Zulaport. The economy of Zulaport is believed to be controlled to a powerful vampire named Indorel, who uses a network of goblin, human, and ogre thugs to ensure herself a cut of all the trade that happens around Beyeen."