Columbus knew in advance where the New World was

When Columbus presented his project to the Lisbon Small Academy he didn''t consider one thing. At the Mathematical Junta and at the University of Salamanca scientists relied on Tuscanelli''s geographic calculations. That meant a distance of 12000 kilometres between western Europe and eastern Asia. No ship could have survived such a heavy transition. In Portugal it was the opinion of Toscanelli and in Spain after the intervention of influential nobles of the Royal Court believed the report of Columbus about the length of the route 5710 kilometers.In my hypothesis Paolo Toscanelli as a professional cosmographer might have been aware of some scientific works especially on astronomy including Nasiraddin Tusi''s Zij Ilhani.Some scientists emphasize (mainly Azerbaijani Tajik and Iranian scientists) that when Toscanelli was creating his map he used some data from Nasiraddin Tusi. But in most cases they note that he referred to Claudius Ptolemy''s data.