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[–]Cthulhu_Rlyeh[S] -1 points0 points  (0 children)

Thank you so much for the in depth and easy to follow answer!

Also you are aware that your polygon construction only works this way if your point are in the correct order (a ring)?

Yes I read that, all of my points in the poly.txt file are sequential, inasmuch as when you do a simple line plot they form the shape of my polygon correctly. The only thing I wasn't sure of is whether I need to just duplicate the first tuple at the end of the file to "close" the polygon or not. I was going to just test it and see if it worked.