I have an alignment that is 1877ft long. I created a surface profile along the entire thing. Then I used the Create Featureline From Alignment command to generate a featureline. The resulting featureline that is listed in Toolspace is 0.04ft long and does not show up ANYWHERE in my drawing. Just to confirm this last part, I created a new featureline style with a NEW layer assigned to that style (so there wouldn't be anything else on the layer). Then I used the filter command to search for everything on that layer. It didn't find anything.
What would cause this?
I'm using C3D 2012.
Ok. I've found the featureline in my drawing but I'm still puzzled as to what's going on. The alignment was originally created from a closed polyline.
The featureline goes from just shy of the END of the alignment (station 18+69.996) to the begining of the alignment (station 0+00).
What I'm trying to accomplish: I want a featureline that is "draped" to the existing surface and I want it to be dynamically linked. If the horizontal position changes, I want the elevations to update automatcally.
I know that I can create a featureline and use the "Elevations From Surface" tool. But that's not dynamic (as best I can tell) and it only gets the elevations at the vertices. I'd like for it to truly follow the ground line.
open the closed pline a tiny bit before creating the alignment (although I done it with closed and did not have the issue you describe)
Alignment>> surface profile, FL from alignment>> pick the surface profile.
This work excidedly well for parking lot grading using a control surface
You will have issues if the surface does not completlet cove the alignment. Same with layout profiles; not even 0.01 ft shy.
When I zoomed in really, really extremely close, I found that the ends were actually overlapping and this pline was NOT closed (but the original one from which this was offset WAS and IS closed).
So I fixed the overlap and closed it then recreated everything (alignment, profile and FL). It's working now.