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File:Portolan grid (construction).jpg

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Description Illustration of the construction of the compass or rhumb line grid typical of portolan charts, on the anonymous Genoese nautical chart (c.1325-50) held by the Library of Congress, Washington DC.
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This is a retouched picture, which means that it has been digitally altered from its original version. The original can be viewed here: Mediterranean chart fourteenth century2.jpg: .


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This image is a derivative work of the following images:

  • File:Mediterranean_chart_fourteenth_century2.jpg licensed with Cc-pd-mark-footer, PD-old
    • 2009-01-18T02:53:17Z Durova 5486x4009 (18079272 Bytes) {{Information |Description=Anonymous nautical chart in portolan style probably drawn in Genoa. Covers Mediterranean Sea from the Balearic Islands to the Levantine coast; also covers western part of Black Sea. Oldest origi

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Date/TimeThumbnailDimensionsUserComment
current16:12, 24 June 2011Thumbnail for version as of 16:12, 24 June 20111,235 × 902 (602 KB)Walrasiad{{Information |Description=Illustration of the construction of the compass or rhumb line grid typical of portolan charts, on the anonymous Genoese nautical chart (c.1325-50) held by the Library of Congress, Washington DC. |Source=*[[:File:Mediterranean_ch
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