No, Columbus relied on the calculations and map of the Italian mathematician and astronomer Toscanelli (1397 – 1482).
It’s amazing how the same questions and misconceptions get rehashed over and over again on the board.
See this recent thread for a long discussion about Columbus.
There also seems to be the same outdated misconception about science and technology in medieval times.
Wikis on
European science in the Middle Ages
Western Europe would see a period of scientific decline during the Early Middle Ages. However, by the time of the High Middle Ages, the region had rallied and was on its way to once more taking the lead in scientific discovery. Scholarship and scientific discoveries of the Late Middle Ages laid the groundwork for the Scientific Revolution of the Early Modern Period.
After the Renaissance of the 12th century, medieval Europe saw a radical change in the rate of new inventions, innovations in the ways of managing traditional means of production, and economic growth.[2] The period saw major technological advances, including the adoption of gunpowder, the invention of vertical windmills, spectacles, mechanical clocks, and greatly improved water mills, building techniques (Gothic architecture, medieval castles), and agriculture in general (three-field crop rotation).