Noun
portolan (plural portolans)
(historical, nautical) A chart of European navigable waters based on descriptions of coasts. [from 18th c.]
The golden round island at the mouth of the Senegal River is the indication (customary on portolan charts) of river mouth bars or islands - in this case, probably a reference to the Langue de Barbarie or the island of Saint-Louis ). Source: Internet
In the first book (1521), this section has a total of 132 portolan charts, while the second book (1525) has a total of 210 portolan charts. Source: Internet
Primary source portolan style chart on vellum with summary description, image with enhanced view and zoom features, text to speech capability. Source: Internet
The second section is entirely composed of portolan charts and cruise guides. Source: Internet