Create perimeter around curves

[magnus]

Hello all
I want to create a perimeter from a set of curves. It should take the shortest route possible.
I think my goal is best illustrated with pictures:
How it currently looks:

What i want (behold my skills in Paint):

What I am interested in is how you would approach this problem? and if there are some nodes that i should look into?
Thanks!

[Michael_Kirschner2]

you want to calculate something like a convex hull I guess.

[magnus]

Thanks! That’s it

[vanman]

what about if you wanted this perimeter?

[filip.kabelis]

I would extrude them all, join solids and then got top surface of that solid, then would get curves of that surface, et voila:)