In most eveery map I've seen, the Atlantic Ocean is in the center, with the Americas on the left and Eurasia/Africa on the right. I think maybe it's centered on the prime meridian, which would make western Europe the center. I don't know... I've always lamented the lack of maps centered on the Pacific Ocean so that I can see how the western Americas and East Asia relate. (I know I could just use a globe, but i still want to see that map)