Creating breakline with correct Z from a survey

[cyberflow]

Hi !

I usually receive a survey and have to create a surface with it and work it a bit by creating breaklines (for centerline, curb's and ditche's).

The surfaces is built with blocks with elevation info.

The lines are already drawn but they're a simple polyline (with one single Z elevation) put each vertice is at the same position has a block that has all the info with the elevation.

I was wondering if there's a way other then snapping a 3dpoly or a feature line ?

Its a bit of a time killer and i think that there's a quicker way to do what i do.

I'm not sure if a drap to surface with the polyline will add the Z information to the breakling ? ..

(Little printscreen to show you)

[tcorey]

That would work.

Build the surface from the blocks, then add the polylines as Proximity Breaklines. They will change no elevations, but they will force some interpolation lines to flip.

The next step is to hire a surveyor who will give you actual points and 3d polylines as breaklines, or, better yet, will provide the surface in a drawing he created with Civil 3D. 😉

[cyberflow]

Hey hi there,

Just tryed the "proximity" option on the breaklines.
Does really make has clean has a 3d poly or a feature line.

Had to redo each line in feature.

[doni49]

Please try restating your issue.

The only thing I got out of it was that you had to redo it.  That second third sentence didn't make sense.

But give this a read too.

http://docs.autodesk.com/CIV3D/2012/ENU/filesCUG/GUID-B7F746C2-40FB-43F6-9583-A0FE6E76388-853.htm

[neilyj666]

Also need to make sure that the proximity breaklInes are not converted to standard when surface is buiIt.

[_Hathaway]

The only one creating the surface should be the surveyor in charge or someone working under him IMO. Anytime you try and 'create' a surface out of data only, it's almost guaranteed to be wrong.

Why isn't the surveyor supplying you a surface?

[sboon · Accepted solution]

Tim's idea will create 3d breakline data within the surface definition, but won't change the original 2d polylines.  If you really want featurelines with the correct point elevations then you'll need to create the surface, then convert all of the polylines to featurelines.  Once that is done you can use the elevations from surface command to get the featurelines to the correct elevations - make sure that the option for inserting intermediate grade breaks is turned off.

Steve
Please use the Accept as Solution or Kudo buttons when appropriate

[cyberflow]

Well our surveyor doesn't use Civil 3d.

We use it to do the conception.

I guess it differs from company to company !

Ty everyone for replying.
Was pretty much busy lately and with a holiday too.

I used sboon solution and worked.
Was just wondering if there was a quicker way since the vertex was at the same X & Y if there was a way to take the Z of the bloc and put it to the polyline or feature.

But it seems theres only way to do it and it's manually !

Ty again 🙂 Very much appreciated !

[neilyj666]

For future reference if your surveyor uses something that is capable of producing a triangular DTM then request that this is supplied.