Striking, example of Porcacchi's fascinating sea chart of the World, which first appeared in Porcacchi's pocket-size Isolario, L'Isole Piu Famose Del Mondo (Venice 1572).
A highly distorted, miniature sea chart of the world, the map's marvelous dark blue coloring obscures some rhumb lines emanating from sixteen points used by ancient mariners. This nautical map displays most of the world, but extends only just beyond India in the east. The Northwest Passage is clearly shown. Also of note is the massive unknown southern continent, titled "Terra Incognita". There is considerable accompanying text in three columns of Latin above and below the map and on the verso.