Great tutorial. You explained every triggers function before posting the trigger,
so the person which is going to use this tutorial, didn't just copy the tutorial,
but improves his/her JASS knowledge a bit. I don't really understand JASS, but
with your explanations, I understood at least a bit. :)
I may use this system for my world map of my pirate campaign, because I think
this is perfect for navigation.
+rep and great tutorial