I think it's just not aligned, they didn't get the scale perfect. That pointy bit over the ocean and the bit hanging down from it are actually pretty close to right, just need to be moved over and twisted a bit.
Since the Middle Ages, and when Norway was first mapped in the 17th century, Telemark had only been a white spot on the map, that is to say, no so-called learned person had traveled through the region, and the area was mostly unknown to people in the cities and along Coast. The Telemark farmers had a reputation for being quarrelsome and 'bloodthirsty' and would not go out of their way to kill both priest and bailiff if it suited them. The hand ax was in frequent use and the knife was loosely in the sheath!
Holy shit my brain had a tough time with realizing that the normal map thing where the light part is land and the dark part is water isn't what's happening here 😅
I think what @i_love_FFT@lemmy.ml means is that on the Ottoman map you kinda get France, and then directly on the coastline right north of France you get Jutland. It's sorta like if you took Europe and did a ripple cut to remove the Netherlands out of it.
It's the Mercator projection. The map behind it is just a normal map we're used to seeing since it matches up fairly well it must be the same projection.
What's really interesting is the mild longitudinal shifts while latitudes are really good. No doubt this was in large part because we can use the direction of the sun and stars to get North or South, but for east or west you were much more dependent on precision timekeeping.