How to get outline from multiple curves

Hi guys,

Is there a faster way to get the outline from multiple curves? I usually split each individual curve then join each one to get the outline but this gets really time consuming. The one on the left is what I want to achieve on the other drawing.

if you have curves at the boundary you can use CurveBoolean and click outside. overlapping curves you might have to trim away or split and use SelBoundary to delete if present. if you dont have outlines that engulf the entire curves, you have to amend them, or you can help yourself with drape. for this you extrude the curves and use drape orthogonal to the surface and extract an isocurve from it, that will outline your curves somehow.