AutoCAD Civil 3D

[#1]

Hello all,

So I am attempting to create a simple grading daylight. I began with a 3D Polyline that has only 2 verticies. When I "Convert Feature Lines from Objects," it creates a feature line with 4 verticies. The 1st and last have the initial elevations from the 3D Poly, but the 2 new verticies seem to be pulling elevations off the surface below where I am working.

My questions are: 1) why are new verticies added? 2) can this be prevented?

I know that I can overwrite the slopes in elevation editor, but this seems like an unnecesarry extra step.

Thank you for your input

[#2]

When you Create Feature Line from Objects, be sure you turn off the option to Assign Elevations.

[#3]

Or if you need to assign elevations uncheck  in the Assign Elevations dialog box.

Allen

[#4]

Thank you for your comments. I will see when I run into it again if I can give a more concrete example as both of your suggestions I believe I was already doing.