Pirate+Map

This is my Pirate Map. When I made this Pirate Map, I wanted it to look good, but also be hard to solve without being impossible. And I succeded. I chose an island design. And made some mathematical clues. As you can see, it worked out in the end. Some of the mathematics that had to be solved before finding my treasure were:
 * square roots
 * angles
 * algebra
 * fibonacci numbers
 * percentages