Image: Portolan windrose (plain)
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Description: Detail of a plain unadorned 32-point wind rose (or compass rose) on an anonymous Genoese portolan chart, c.1325-50 (held by the Library of Congress, Washington DC). As is standard on portolan charts, the rhumb lines emanating from the center are color-coded: black for the eight primary winds (N, NE, E, SE, S, SW, W, NW),green for the eight half-winds (NNE, ENE, etc.) and red for the sixteen quarter-winds.
Title: Portolan windrose (plain)
Credit: Mediterranean_chart_fourteenth_century2.jpg
Author: Mediterranean_chart_fourteenth_century2.jpg: anonymous, probably Genoan derivative work: Walrasiad (talk)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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