How to Extract two edge curve from polysurface?

Hi All,

I am trying to create some elements from the edge of the Curve on the edge. how can i extract the two curve on the two side of the brep.

please find the GH below.

thanks
extact boarder.gh (10.5 KB)

Hi , on my phone right now but :
Surface •->• debrep (edges) •-> cull index ?:thinking:


extact boarder_2024Apr8a.gh (12.6 KB)

1 Like

Thank you Joseph!