Pics comparing Piri Reis map with the Nasa animation titled "draining the oceans" continental shelves with still taken at approx 2 miles below current sea level.
Color coded indicators of alignment points
Still used
Still annoted
Piri's map northern hemisphere
Piri's map southern hemisphere
Color coded indicators of alignment points

Still used

Still annoted

Piri's map northern hemisphere

Piri's map southern hemisphere