🔬 Science 1h ago · Frank Jacobs

A medieval map mystery may finally be solved

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A medieval map mystery may finally be solved
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“We’ll just have to think our way back, step by step.” That’s what the Dutch geodesist Roelof Nicolai said in 2014 in a Strange Maps article. Nicolai had just spent his PhD years discovering that portolan charts — those gorgeous, wind-rose-covered coastline maps that suddenly appeared in Mediterranean ports in the second half of the 13th century — were geometrically too accurate to have been made the way everyone assumed. Something else was going on.
Twelve years on, we might have an answer. Tom

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