cbriana Posted June 12, 2008 Share Posted June 12, 2008 i am trying to get 3d polylines of some alignments that i have already defined. I created cogo points from the alignments but i was wondering if there was a way to get a 3d polyline through the points without having to click each point manually. (ie entering a point range and having autocad generate a 3d polyline for you.) I am using AutoCAD 2008 with Land Desktop Companion Thanks Quote Link to comment Share on other sites More sharing options...
rustysilo Posted June 12, 2008 Share Posted June 12, 2008 Do you mean a 3D polyline representing your vertical alignment (profile)? Quote Link to comment Share on other sites More sharing options...
cbriana Posted June 12, 2008 Author Share Posted June 12, 2008 no, not a profile. i want a 3d polyline along the alignment in the plan view that has elevations corresponding to the elevations defined in the vertical alignment Quote Link to comment Share on other sites More sharing options...
rustysilo Posted June 12, 2008 Share Posted June 12, 2008 Yeah that's what I meant. If you have a profile with a vertical alignment defined then yes you can do this. The process is as follows (assuming you have already created cogo points of the vertical alignment): 1. Open the Terrain Model Explorer 2. Create a surface 3. Expand the surface data 4. Right-click on breaklines 5. Define by Point Numbers 6. Key in the first point number, dash, last point number 7. Adore your work Quote Link to comment Share on other sites More sharing options...
cbriana Posted June 12, 2008 Author Share Posted June 12, 2008 Thank You. That was exactly what i needed. Quote Link to comment Share on other sites More sharing options...
rpduenas Posted March 6, 2009 Share Posted March 6, 2009 If i'm following your instructions, you would then have a surface created along your centerline. How would you model the cross slope of the alignment (if it were a roadway) and place an accurate boundary on the surface? Quote Link to comment Share on other sites More sharing options...
rustysilo Posted March 6, 2009 Share Posted March 6, 2009 Use stepped offsets of the 3d polyline you just created in the previous steps. That's one way to do it anyway. You could also use the roadway design tools available in the Civil Design module if you have it loaded. Much easier in Civil 3d. Quote Link to comment Share on other sites More sharing options...
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