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Surface Cross-Section problem

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pinbot:
Hello Lars and friends!
As a land surveyour I use many CADTools commands and simply love it! ;)
I'm trying to set workflow for bridge rehabilitation projects, and have few questions and problems.

Right now my workflow looks something like this:

1. I survey road with total station in intervals 5-10m which include; left and right bridge edge, curb, travelway, left, right and middle line
2. In Autocad I connect all this points with 3dpolylines
3. I make CADTools surface from mentioned 3dpolylines, and use them as breaklines.
Then I inspect surface to correct any inconsistencies, and save surface again.
4. I use middle line as alignment, and create longitudinal profile by using Profile 3d polyline
5. I make Surface Cross-Section and now things complicates little bit.
When I look at surface in plan view, it looks as it should, but when I make surface profile, it interpolates crossections, and I get something really weird (screenshot below), so they are useless. I added Reference lines (RED polyline) to profiles, so you can see how profile should look like, and surface (YELLOW polyline).
Am I missing something, or doing something wrong?
Would it be possible to crossection just 3dpolylines, to completely avoid surface?

Lars:
Hi,

I think you get a better triangulation if you survey lines along the bridge not cross the bridge.

As for now you can try to clean up the input data. Use the CadTools Simplify command with a tolerance of zero to remove vertices that isn’t contributing to accuracy and only will generate extra triangles.

When triangulating use all lines as breaklines and remember that breaklines is not allowed to cross.

As for the curb lines, triangulating points (vertex) with same coordinates but different elevation is not allowed. You have to supply lines that is will try to create vertical triangles. However you can offset one of the lines horizontally a very small distance to avoid that scenario.

pinbot:
Thank you for all suggestions, but simplify process didn't work. I get same scattered crossections :'(

I survey along the bridge stopping at every station, and survey characteristic points left and right, and I get pretty nice bridge/road 3d model, but problem is that I can't make usable crossections  :(
Since I generally have 30+ sections, I do alot of manual work. I'm trying to simplify some steps, and maybe you could help with little bit of CT modifications.
If it would be possible to drape crosslines/polylines to surveyed (and connected) longitudinal 3dpolylines, instead to a surface (which scatter sections), I would get precise crossections.
I could then use ''Surface Cross-Sections'', or maybe you could modify ''Profile 3d polyline'' a bit, so you can select multiple 3d polylines and profile them. Modification of ''Profile 3d polyline'' would be great, because it has height, distances, slopes and height differences, which is very very usable. I red whole forum, and I saw that I'm not the only one who would benefit from such modifications, so I hope you can spare little bit of your free time to help.

Thanks in advance!

Lars:
I'll check if there is something wrong in the code for creating cross section.
What version do you use (Build)

/Lars

pinbot:
Version 730
Merry Christmas! :)

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