my map is here in the picture : http://grasshopper3d.googlegroups.com/web/Snap10.png?hl=en&gsc=06IJiQsAAACjR5A0eN-P0w4V8Kou3vQQ
strange thing is : I introduce 1105 curves . choose them by length and use the boolean twice( up and down) down is right. up is wrong: there is so so so many result . way!??
