Posted on 06/12/2015 10:43:35 AM PDT by Red Badger
Henricus Martellus, a German cartographer working in Florence in the late 15th century, produced a highly detailed map of the known world. According to experts, there is strong evidence that Christopher Columbus studied this map and that it influenced his thinking before his fateful voyage.
Martellus' map arrived at Yale in 1962, the gift of an anonymous donor. Scholars at the time hailed the map's importance and argued that it could provide a missing link to the cartographic record at the dawn of the Age of Discovery. However, five centuries of fading and scuffing had rendered much of the map's text and other details illegible or invisible, limiting its research value.
A team of researchers and imaging specialists is recovering the lost information through a multispectral-imaging project. Their work is yielding discoveries about how the world was viewed over 500 years ago.
Last August the five-member team visited the Beinecke Rare Book & Manuscript Library, where for years the Martellus map hung from a wall outside the reading room. (It was recently moved to the Yale University Art Gallery for storage while the library is under renovation.) The team, funded by a grant from the National Endowment for the Humanities, photographed the map in 12 reflective colors, including several frequencies beyond the range of visible light. Those images were processed and analyzed with high-tech software.
"We've recovered more information than we dared to hope for," says Chet Van Duzer, a map historian who is leading the project.
The map, which dates to about 1491 and depicts the Earth's surface from the Atlantic in the west to Japan in the east, is dotted with descriptions in Latin of various regions and peoples. A text box visible over northern Asia describes the people of "Balor" who live without wine or wheat and subsist on deer meat.
Van Duzer says the new images reveal many such descriptions. For instance, text uncovered in southern Asia describe the "Panotii" people as having ears so large that they could use them as sleeping bags.
Newly revealed text in eastern Asian is borrowed from "The Travels of Marco Polo." From the discrepancies in wording, Van Duzer has determined that Martellus used a manuscript version of the travelogue, not the sole printed edition in Latin that existed at the time.
Perhaps the most interesting revelations, say the researchers, concern southern Africa. By studying visible river systems and legible place names, Van Duzer had previously determined that Martellus based his depiction of the region on the Egyptus Novelo map, which survives in three manuscripts of Ptolemy's "Geography." The Egyptus Novelo used geographical data from native Africans, not European explorations. It is thought that the map was based on information shared by three Ethiopian delegates to the Council of Florence in 1441.
The new images show that the Martellus map's depiction of southern Africa extends further east than the known versions of the Egyptus Novelo do, suggesting that the German cartographer was working from a more complete version of the map that showed the eastern reaches of the continent.
"It's a seminal and tremendously important document of African mapping by the people of Africa, in this case preserved by a western source," says Van Duzer.
The new images also have helped Van Duzer to determine how the Martellus map influenced later cartographers. The map is similar to a world map drawn by German cartographer Martin Waldseemüller in 1507, which was the first map to apply the name "America" to the New World. The multispectral images show many of the same texts on Martellus' map in the same locations as on the 1507 map, confirming that the Martellus map was an essential source for Waldseemüller, says Van Duzer. At the same time, he notes, the cartographers' works are not identical: Waldseemüller borrowed most of his place names in coastal Africa from a different map.
"It puts you in the mapmaker's workshop," says Van Duzer. "It's easy to imagine Waldseemüller at his desk consulting various sources."
Waldseemüller was not alone in contemplating Martellus' work. Van Duzer says it is nearly certain that Columbus examined the Martellus map, or a map very similar to it.
Writings by Columbus's son Ferdinand indicate that the explorer had expected to find Japan where Martellus depicted it, and with the same orientation, far off the Asian coast, and with its main axis running north and south. No other surviving maps from the period show Japan with that configuration, says Van Duzer.
In addition, the journal of one of Columbus's crewmembers, who believed the expedition was sailing along island chains in southern Asia, describes the region much as it is depicted in the Martellus map.
Revealing the map's faded details provides a more complete picture of Columbus's perception of geography, notes the historian.
"It's always interesting to learn how people conceived the world at that period in history," says Van Duzer. "The late 15th century was a time when people's image of the world was changing so rapidly. Even within Martellus's own career, what he was showing of the world expanded dramatically."
The discoveries are the result of painstaking effort. The multispectral images are processed using special software that finds the precise combination of spectral bands to enhance the visibility of text. The work involves a lot of experimentation.
The map's text was written in a variety of pigments, which complicates the task of recovering lost letters because individual pigments respond differently to light.
"We're still finding things," says Professor Roger Easton of the Chester F. Carlson Center for Imaging Science at Rochester Institute of Technology. "We're focusing on these difficult cartouches and text blocks. One day last week we pulled out 11 characters. The next day, we got several words."
Easton estimates the team has uncovered about 80% of recoverable text. Some of the text is entirely invisible before processing. The team is currently at work uncovering details in the region around Java.
Once the project is completed, the new images will be made available to scholars and the public on the Beinecke Library's website.
Very cool. Having done a little navigation myself I am simply astounded at that feat of seamanship - these guys had no means of determining longitude and they still managed to end up pretty much where they intended. Once might be accident, twice luck, but four times is just amazing.
They used a knotted rope to determine their speed at any given moment and so were able to roughly calculate distance gone.....................
A tidal wave or earthquake would make this island disappear again.
The Ferengi are pure capitalists..........................
Nah.
.
He believed, or so it is said, that one could sail west to get to India rather than go around Africa, and it would be quicker. He grossly underestimated the diameter of the Earth...............
Heh, I was getting ready to ping you.... Glad I don’t have to!
;-)
He had the right latitude for India, but had no clue how big the Earth was. His intent was to find a quick way to get to India, so he did what Climatologists do today, he declared it to be India.......................
My compliments to your brother and his colleagues, this branch of science is immensely interesting. Lost works of antiquity are coming back into focus thanks to their work and that’s truly priceless.
Great post! I’m a Cartologophile too (if that’s a word)!
It must be, my spellchecker passed it!...................
Very interesting. Thanks for posting.
I'm particularly impressed with Wm Bligh's awesome trek taking the small boat he was kicked onto after the mutiny of The Bounty.
from wiki: The mutineers provided Bligh and eighteen loyal crewmen with a 23-foot (7 m) launch (so heavily loaded that the gunwales were only a few inches above the water). They were allowed four cutlasses, food and water for perhaps a week, a quadrant and a compass, but no charts, or Marine chronometer. Most of these were obtained by the clerk, Mr. Samuel, who acted with great calm and resolution, despite threats from the mutineers.
The launch could not hold all the loyal crew members, so four were detained on the Bounty for their useful skills; they were later released in Tahiti.
Tahiti was upwind from Bligh's initial position, and was the obvious destination of the mutineers. Many of the loyalists claimed to have heard the mutineers cry "Huzzah for Otaheite!" as the Bounty pulled away.
Timor was the nearest European outpost, 3,618 miles away. Bligh and his crew first made for Tofua, only a few leagues distant, to obtain supplies. However, they were attacked by hostile natives and John Norton, a quartermaster, was killed.[4] Fleeing from Tofua, Bligh did not dare to stop at the next islands (the Fiji islands), as he had no weapons for defence and expected hostile receptions. He did, however, make use of a small notebook to sketch a rough map of his discoveries.
Thus, he undertook the seemingly impossible 3,618 nautical miles (6,701 km; 4,164 mi) voyage to Timor, the nearest European settlement. In this remarkable act of seamanship, Bligh succeeded in reaching Timor after a 47-day voyage, the only casualty being the crewman killed on Tofua.
Does anyone here know the nature of the “bedrock” undergirding these structures?
S’il vous plait?
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