Portulan
A portulan (in much of languages portolan ), at the 14th century or later, was a nautical kind of Carte primarily being used for locating the ports and knowing the dangers which could surround them: currents, hollows… The portulans were coarsely drawn, the details sticking only to what had importance for navigation. The establishment of these nautical charts was based on a mode of navigation by Cabotage.
A portulan is founded on observations and statements made with the compass. To judge relevance or quality of these true charts of navigation, it is necessary to apply the magnetic Déclinaison to it… since centuries.
Oldest portulan known goes back to 1296, in a Neapolitan charter . The cartographer Angelino Dulcert carried out of them one in 1339.
Related articles
External bonds
-
portulans - virtual exposure (National library of France)
- Francesco Oliva, chart-portulan of the the Mediterranean, Messine, 1603 (BNF)
- on the English wiki
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