Hello Kaloy.
You have a posted a map,,.The most important thing about that map,Try to study if their is a scale as well as
Direction on the upper portion of the scale..That would be your guide,..That 640 which appears on your map,probably
that is a distance,.If your map is Authentic then stick to your map,.because all informations was given on the map..
Distances,Directions and Instruction,..If your on the area where treasure is located try to look for the rock formations
which is a permanent marker..That 200 deg. or 20 deg..Its just an alignment..Not all the time it is applicable on the area
because some of the alignments uses North and South directions..As well as Compass secret degrees..
Thanks..Happy Hunting Kaloy