03-03-2025, 07:27 AM
Just came across this drawing of the Cortona Chart Black Sea and noticed similarities with f82r!
![[Image: f082r_crd.jpg]](https://voynich.nu/q13/f082r_crd.jpg)
![[Image: COR0002.jpg]](https://www.cartographyunchained.com/wp-content/uploads/2018/03/COR0002.jpg)
![[Image: COR0010.jpg]](https://www.cartographyunchained.com/wp-content/uploads/2018/03/COR0010.jpg)
![[Image: 42489_2023_154_Fig7_HTML.png]](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs42489-023-00154-6/MediaObjects/42489_2023_154_Fig7_HTML.png)
Ignore the Sea of Azov at the top of the drawing, as it is not in the vms drawing on f82r.
I think that is a pretty good comparison. It includes the tilt and everything.
The lower drawing goes on to compare the true geographical form of the Black Sea and Azov.
Also, it is now thought that all the early portolans had a common ancestor. It would seem that the vms Black Sea follows this tradition, of the Cortona Chart in particular.
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Abstract
Anonymous Carte Pisane (c. 1275) and Cortona chart (c. 1300), as well as Pietro Vesconte's charts, made in 1311 and 1313, which represent some of the earliest known portolan charts, were cartometrically analysed to examine the geometric similarities between their coastal renderings. The research results show that not only the majority of their territorial coverage was drawn very similarly to each other but also that certain parts of the coastline are nearly identical between all the examined charts. Also, the magnitude and orientation of displacement vectors of residuals revealed that the Mediterranean and Black Sea areas on charts contain seven subsections which are on average, twice as accurate in comparison to the same area treated as a whole. The fundamental conclusion is that there is a high probability that the coastline renderings on the earliest known portolan charts are, actually, more or less skilfully made copies of the same source material used as a graphic template. The hypothetical source might have been an atlas whose origins date back to before the Middle Ages, containing charts whose extents were, perhaps, similar to the extents of detected subsections, which medieval cartographers were not able to assemble correctly due to their ignorance of map projections.
![[Image: Blog_Portolans_II_480x480.jpg?v=1702661880]](https://cdn.shopify.com/s/files/1/0390/9705/files/Blog_Portolans_II_480x480.jpg?v=1702661880)
Ignore the Sea of Azov at the top of the drawing, as it is not in the vms drawing on f82r.
I think that is a pretty good comparison. It includes the tilt and everything.
The lower drawing goes on to compare the true geographical form of the Black Sea and Azov.
Also, it is now thought that all the early portolans had a common ancestor. It would seem that the vms Black Sea follows this tradition, of the Cortona Chart in particular.
You are not allowed to view links. Register or Login to view.
Abstract
Anonymous Carte Pisane (c. 1275) and Cortona chart (c. 1300), as well as Pietro Vesconte's charts, made in 1311 and 1313, which represent some of the earliest known portolan charts, were cartometrically analysed to examine the geometric similarities between their coastal renderings. The research results show that not only the majority of their territorial coverage was drawn very similarly to each other but also that certain parts of the coastline are nearly identical between all the examined charts. Also, the magnitude and orientation of displacement vectors of residuals revealed that the Mediterranean and Black Sea areas on charts contain seven subsections which are on average, twice as accurate in comparison to the same area treated as a whole. The fundamental conclusion is that there is a high probability that the coastline renderings on the earliest known portolan charts are, actually, more or less skilfully made copies of the same source material used as a graphic template. The hypothetical source might have been an atlas whose origins date back to before the Middle Ages, containing charts whose extents were, perhaps, similar to the extents of detected subsections, which medieval cartographers were not able to assemble correctly due to their ignorance of map projections.