Arzt's Map

Arzt's Map was featured in the Season 3 episode Exposé (314) and was supposed to help Nikki and Paulo finding the luggage with the diamonds in it. The map brought them to The Pearl, while the luggage was in the same Waterfall Kate and Sawyer found the Halliburton Case in. Thanks to Brian, now we have a good screenshot of that map. I tried to enhance the map, but the result wasn't as good as hoped. Here it is.This is my representation of that map (sorry, but my drawing skills are not very good...)Something to note is:

• the lines in the upper part of the map seem to resemble one of the two mountain ranges (possibly the west one).
  
• the lines in the lower part seem to be waves, representing the ocean but they could be captions and notes written by Arzt. We just cannot know.
• there are two zones marked with "X". It's possible the central one is the Beach Camp, or the Cave. As for the one on the right, it could be the area around the Pearl, the area near the Waterfall or somewhere else, depending on: Arzt's real skills in determining trajectories; Nikki an Paulo's ability to travel through the Island; and the fact that the map is hardly in scale.
• I obviously flipped the image: we see the map "through" the piece of paper, as the map is drawn on the other side.
  

So, what do you think? If you have any idea, just leave a comment, as your guesses are probably better than mine!
Thanks again to Brian for the screenshot.