Chapter 10 aerial drawing

Among the replicas of ancient maps discovered in Constantinople in the early eighteenth century, there are two pieces of parchment map fragments made of African antelope skin. It is estimated that these fragments should be part of an ancient map. There are no longitude and latitude lines in this picture, only a few small circular patterns, and many radiating straight lines radiate around, with sailboats, elephants, deer, people, etc. painted. It probably depicts the Atlantic Ocean, North and South America and part of the European continent. There's nothing surprising about this, and the plotting is precise at best.But on the contrary, compared with the superb drawing technology mentioned above, this map has obvious flaws.Because the shape of the land is skewed, especially the coastline, what is the reason for this?

Finally, an even more astonishing discovery emerged. This map was actually similar to the military map drawn by the Orthodox method used by the Air Force during World War II. Because it was viewed from a high altitude, the land and coastline were all skewed.Comparing this kind of high-altitude mapping with ancient maps, it is almost completely consistent. Some scholars compared the ancient maps with the photos of the earth taken by satellites, and not only found that they were exactly the same, but also showed the difference in visual distance caused by the fact that the earth is a sphere.

We know that there were no flying tools before the 18th century, so why did cartographers go to high altitudes to map?Did a more advanced civilization exist before, or did aliens visit?