How did Piri Reis map Antartica so detailed while not knowing existed until 300+ years later?

by welchie98

I am wondering does any historian have any clue if Reis knew anything about Antartica or if there was any landmass up there?

Searocksandtrees

Hi, you may be interested in this recent answer by /u/mikedash

[How is it possible Piri Reis map depict Antarctica to be free of ice since it had ice on it for millions of years?] (https://www.reddit.com/r/AskHistorians/comments/7vhw7j/how_it_is_possible_piri_reis_map_depict)