I've just seen a post about a Da Vinci map of the new world engraved on an ostrich egg. How did we discern such gigantic detail from such a miniscule level. It just blows my mind. Because the only thing I can think is that they walked along the coast and traced it. But then how the hell is that translated onto a three dimensional sphere!?!?

I am completely in awe of our old map makers. How did the fathom the structure of our earth? If anyone can help me understand, thank you. Peace ✌

Edit: the ostrich egg globe

https://www.reddit.com/r/ArtefactPorn/comments/lauj1n/the_da_vinci_globe_dated_1504_is_the_oldest_known/?utm_medium=android_app&utm_source=share