Extract Cut Boundary from volume Triangulation Surface

[neilyj666]

I want to extract the cut limits from a volume surface i.e. the "0" level as an enclosed shape so I can do some GIS type analysis but it is proving very frustrating.

I have tried exploding the surface and shrinkwrapping the resulting solids but this causes a shift in X/Y for some reason.  I've also tried extracting the zero contour and surface boundary to create the areas but this also fails due to not closed boundary errors

There must surely be an easy way to do this so please hit me up with some suggestions   

Thanks

Neil

[tcorey]

If I was doing this, I would create a user contour at 0, then extract from surface: User Contours and Surface Border.

That will give you polylines you can manipulate into a closed entity. You will need to join the polylines into a single object.

[neilyj666]

At the moment I am doing just this although I used the minimum dist between surfaces rather than the zero contour.

It is extremely frustrating that the surface analysis shows the area I want but it cannot be extracted easily and I have to manipulate polylines to get the closed boundaries

[neilyj666]

I went back to the first method and FLATTENed the solids and the shrinkwrap boundaries were created as expected