I only pinged you to the HAB reply because you'd been pinged to the earlier information.
Those 16th c maps don't show what they're purported (by some) to show, which is an ice-free Antarctica. None of the maps of the early "Age of Sail" can compare with modern maps, even for coastlines that were near to the homes of the mapmakers, much less the "here be dragons" ends of the Earth.
I'd agree that the permanent glaciation of Antarctica as we know it today is a bit more than two million years old, and arose as a consequence of the Eltanin impact. That is, perhaps coincidentally, about when our ancestors started their long hard climb.
I don't agree that it was ever Atlantis.
About Atlantis R Temple wrote that there never was such a place rather it was a ruse by the Atlantic “civilization” (the megalith builders) to mislead others into venturing out into the Atlantic on a fools quest to protect their trade routes from Libya and up along the Atlantic coast from Mauritania to Britain