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Who discovered the Great Salt Lake?
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[QUOTE]Originally posted by glassman: [QB] old maps are cool. considering how they had to guess how far they had gone east and west it's pretty amazing how close they were. there's another old map that still has afficionado's scratching their heads too. [b]In 1929, a group of historians found an amazing map drawn on a gazelle skin. Research showed that it was a genuine document drawn in 1513 by Piri Reis, a famous admiral of the Turkish fleet in the sixteenth century. His passion was cartography. His high rank within the Turkish navy allowed him to have a privileged access to the Imperial Library of Constantinople. The Turkish admiral admits in a series of notes on the map that he compiled and copied the data from a large number of source maps, some of which dated back to the fourth century BC or earlier. The most puzzling however is not so much how Piri Reis managed to draw such an accurate map of the Antarctic region 300 years before it was discovered, but that the map shows the coastline under the ice. Geological evidence confirms that the latest date Queen Maud Land could have been charted in an ice-free state is 4000 BC.[/b] http://www.world-mysteries.com/sar_1.htm the implication of the existence of the Piri Reis map is that we are missing a huge chunk of history. [b]Piri Reis used several different sources, collected here and there along his journeys. He himself has written notes on the map that give us a picture of the work he had been doing on the map. He says he had been not responsible for the original surveying and cartography. His role was merely that of a compiler who used a large number of source-maps. He says then that some of the source-maps had been drawn by contemporary sailors, while others were instead charts of great antiquity, dating back up to the 4th century BC or earlier.[/b] the US Navy confirmed that the map was more accurate than their own in 1953, and that it used plane geometry, containing latitudes and longitudes at right angles in a modern grid, but it is obviously copied from an earlier map that was projected using spherical trigonometry, and that much of the map showed features under a mile of ice. getting accurate longitudes was impossible until this: [b]The British Longitude Act of 1714, in the reign of Queen Anne, promised a prize of 20,000 english pounds for a solution to the longitude problem to anyone that could provide longitude to an accuracy of 1/2 degree. It was an immense amount of money at the time, the equivalent of millions of dollars today. As Dava Sobel explains, "to know one's longitude at sea, one needs to know what time it is aboard ship and also the time at the home port or another place of known longitude-at that very same moment. The two clock times enable the navigator to convert the hour difference into geographical separation. By the time the Royal Commission was disbanded in 1828, it had paid out in excess of 100,000 pounds on determining a method of finding 'longitude', tax payers money for once well spent, British vessels were enabled to navigate the oceans of the world, first by lunar distance and then by ships chronometer, supporting the founding of an empire and a world power. [/b] http://www.sailtexas.com/long.html hmmmmmm.... there's that conundrum again, "tax payers money for once well spent" [/QB][/QUOTE]
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