As usual, you have your 'facts' completely wrong....
"If this was not so, then Christopher Columbus would not have had such a hard time convincing people that the Earth is round.
It is sometimes claimed that the reason Columbus had difficulty obtaining support for his plan was that Europeans believed that the earth was flat. This claim can be traced to Washington Irving's 1828 novel, The Life and Voyages of Christopher Columbus. Irving's claim has no historical basis. In fact, what was at issue was not the shape, but the circumference of the earth.
The fact that the Earth is spherical was evident to most people of Columbus' time, especially to sailors, explorers and navigators. Indeed, Eratosthenes (276-194 BCE) had already, in ancient Alexandrian times, accurately calculated the Earth's circumference. Most scholars accepted Ptolemy's claim that the terrestrial landmass (for Europeans of the time, comprising Eurasia and Africa) occupied 180 degrees of the terrestrial sphere, leaving 180 degrees of water.
From Wikipedia: http://en.wikipedia.org/wiki/Christopher_Columbus
You just regurgitate BS... some of it your own making, the rest BS is what others fed you. Thanks for playing....