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Summary
| Description |
English: The Tondo e quadro ("Circle and Square"), a visual measurement method of calculating trigonometric values for navigation, from the first page of the ten-sheet atlas by Venetian cartographer Andrea Bianco, dated 1436. Held by the Biblioteca nazionale Marciana, Venice. |
| Date | |
| Source | Atlante Bianco, Biblioteca nazionale Marciana, Venice (no.) |
| Author | Andrea Bianco |
| Other versions | Derivative works of this file: Tondo e quadro detail (Bianco, 1436).jpg |
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Licensing
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.  You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:49, 3 August 2011 | | 378 × 381 (69 KB) | Materialscientist | removed some obvious dirt and stray lines on the left and right edges |
| 09:40, 13 July 2011 |  | 378 × 381 (70 KB) | Walrasiad | {{Information |Description ={{en|1=The ''Tondo e quadro'' ("Circle and Square"), a visual measurement method of calculating trigonometric values for navigation, from the first page of the ten-sheet atlas by Venetian cartographer Andrea Bianco, dated 14 |
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