I think it is very difficult to find the center of very large land masses, because they look so different depending on which map projection the map you are looking at uses. read more
Afro-Eurasia, Afroeurasia, or Eurafrasia, nicknamed the World Island, is a landmass which can be subdivided into Africa and Eurasia (which can be further subdivided into Asia and Europe). These three continents form the largest contiguous landmass on Earth. The terms are portmanteaus of the names of its constituent parts. read more
Afro-Eurasia , Afroeurasia , or Eurafrasia , , nicknamed the World Island , is a supercontinent which can be subdivided into Africa and Eurasia (which can be further subdivided into Asia and Europe ). These three continents form the largest contiguous landmass on Earth . The term is a portmanteau of the names of its constituent parts. read more