A cana was a unit of length used in the former Crown of Aragon. The exact meaning was not consistent, but the use in Barcelona was a distance of 1.5708 metres. It is around the same value as the vara of Aragon, a seldom used Spanish and Portuguese unit of length.
- Gilbert, E.W.; Beckinsale, R.P. (1944). Spain & Portugal: Spain. Its Geographical handbook series. Naval Intelligence Division. Retrieved February 15, 2015. Quote: "Catalonia has its own units, the media cana (length) being approximately of the same value as the varas of Aragon".
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