Columbus and Version of the Secret Map

Though America was discovered by Christopher Columbus 530 years ago, that discovery has a lot of obscurities, which make people to think. According to most scientific works, Columbus thought that, he had discovered East Asia. I tried to prove that, the Genoese seaman had got acquainted with the map of Nasiraddin Tusi when he was in Spain before his travel to the western part of the Atlantic Ocean and was aware of the existence of unknown territory there. Yes, Tusi had described America...
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Though America was discovered by Christopher Columbus 530 years ago, that discovery has a lot of obscurities, which make people to think. According to most scientific works, Columbus thought that, he had discovered East Asia. I tried to prove that, the Genoese seaman had got acquainted with the map of Nasiraddin Tusi when he was in Spain before his travel to the western part of the Atlantic Ocean and was aware of the existence of unknown territory there. Yes, Tusi had described America in his map together with its coordinates 220 years before Columbus's transatlantic travel. It is one of the most phenomenal discoveries of the world and Columbus is the author of this discovery.

The oretically, half of Floridian peninsula, Anthills, Mexico and South America became properties of Portugal. After "Aeterna Regis" came into force, historians began to note that, America had been discovered by Portuguese seamen before 1481 and this fact had been kept secret till the convenient time. This thought was defended by all annalists of XVI century - Bartolome de las Casas, Francisco Lopez de Gomara and Gonzalo Fernandez de Oviedo y Valdes, even Peruvian annalist Garcilaso de la Vega (son of the Ink prince and the hidalgo of Estremadura) mentioned name of Alonso Sanchez de Huelva as the seaman, who discovered the continent. Besides it, Jorje Blon, Francisco de Gomara Alonso and others noted that Huelva had met Christopher Columbus.

The French physician Jan Ferrell (1497-1558), who was interested in astronomy, wrote that, the length of the Earth's outline was 39816 km and its radius was 6337 km. It means that, Toscanelli had made a mistake. According to his calculations, the length of the Earth's outline was 29000 km. So, Columbus didn't accept report of the Florentine scientist and took into account measurements determined by the Greek scientist Eratosthenes and geographic coordinates determined by Nasiraddin Tusi.

Of course, my hypothesis is serious enough. As N. Tusi's map was kept in the library of Florentine, "Zij-i Ilkhani" also might be kept there. How could Columbus find that work then?

Columbus got acquainted with the map made by the Florentine scientist Toscanelli in 1474 when he was in Italy. I want to mention that, the distance between Canaries and Bahamas is about 950 liq. According to Columbus's calculations, the most convenient way to Cipango (Japan) was 800 liq towards East Asia in the west of Canaries. It seems that, Columbus didn't take Toscanelli's map into consideration after he made his own calculations. He didn't need the Florentine scientist's calculations.