Good Day
I have a surface that includes a natural stream channel and I intend on placing a concrete channel corridor within the natural channel and have some fill between the two channels. Is there a way to automatically identify the top-of-bank in order to set the fill to extend to it regardless of the slope?
I'm thinking the solution would entail somehow extracting from the surface a polyline that traces the top-of-bank and then setting it as a target in my channel subassembly?
Please see the attached illustration for further clarity.
All assistance is appreciated.
Ntuthuko
You're absolutely correct. Once you have the top of bank 3d polyline, you will use that as a target in the corridor.
Getting the 3d polyline from random points is the issue. Creating a slope analysis style might help you identify where the slope breaks, thus providing a visual to help you trace the polyline yourself.
I don't know of a way to get Civil 3D to automatically extract the top of bank, unless you have survey data. What are the underlying data for the surface?
Didn't the surveyor shoot the top bank? That SOP here as well as a an auto generated feature line for a break line.