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what is wrong for this CAD line for earthwork report ??

  • 1.  what is wrong for this CAD line for earthwork report ??

    Posted 04-07-2023 05:03
      |   view attached

    Hi
    I have this line and I need to make an eartwork report in this area. But there is only ZEROES in the report. What is wrong???



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    Luboš Bejček
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    Attachment(s)

    dwg
    N3.dwg   103 KB 1 version


  • 2.  RE: what is wrong for this CAD line for earthwork report ??

    Posted 04-10-2023 20:32

    Line has zero length segments and it overlaps itself.

    CAD -> Data -> Detect Crossing Geometry
    ANZ Edit -> Check Deflections
    Data Prep -> Project Cleanup



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    Marian
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    Original Message


  • 3.  RE: what is wrong for this CAD line for earthwork report ??

    Posted 04-10-2023 21:28

    Earthworks report requires lines with "clean" geometry.

    Your line has zero length segments and it overlaps itself. 20% can be safely removed.

    CAD -> Data -> Detect Crossing Geometry
    Data Prep -> Project Cleanup
    ANZ Edit -> Check Deflections









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    WorksOS SWC
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    Original Message


  • 4.  RE: what is wrong for this CAD line for earthwork report ??

    Posted 04-11-2023 02:43
    Edited by Luboš Bejček 04-11-2023 03:06

    Thank you.

    This is the first time I´ve met this problem. It is a pitty I have not licenced the Clean up in Data prep so as ANZ.

    I edited this line to get out the wrong geometry and made another two lines from it. Now the geometry check in CAD doesnt show any flags/problems so it should be clean....but the earthwork report is still only zeroes

    I cant find a way how to add an attachment in this reply...
    https://drive.google.com/drive/folders/1jhER5u4UIvuaeVxyHAMskTA6AzIeBY2v?usp=share_link



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    Luboš Bejček
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    Original Message


  • 5.  RE: what is wrong for this CAD line for earthwork report ??

    Posted 04-11-2023 14:10
      |   view attached

    There were still too small line segments.
    I've run both through Project Cleanup and now the earthworks report computes.



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    Ronny Schneider
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    Attachment(s)

    zip
    Z3 strandy fixed.zip   19 KB 1 version
    Original Message


  • 6.  RE: what is wrong for this CAD line for earthwork report ??

    Posted 04-12-2023 00:19

    So ....generaly....the problem could be zero lenght segments and too small segments.....  what is the smallest lenght for TBC that alow compute the report?......

    What can you advice to us that dont have Project Clean up?.... 



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    Luboš Bejček
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    Original Message


  • 7.  RE: what is wrong for this CAD line for earthwork report ??

    Posted 04-12-2023 04:01

    Definitely no sub-mm segments. I believe from 1-2 mm upwards it should be ok.

    In order to compute the volumes the surface needs to be cutoff along the boundary. Hence the triangulation needs to be recomputed. And if you have extremely small line segments that leads to extremely thin triangles. From my point of view it should still be able to compute the volume prisms, even if they have volumes near zero. Why the whole earthworks report fails and results in overall Zero is a question for the Trimble developers. It might just be that they test the boundary for that kind of stuff and just skip the whole computation without giving you a proper error message. Wouldn't be the first time, i.e. exports/imports not working without proper feedback to the user.

    I believe that kind of issue can even arise with the Surface Edge Boundary that you can get from a surface itself.




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    Ronny Schneider
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    Original Message


  • 8.  RE: what is wrong for this CAD line for earthwork report ??

    Posted 04-12-2023 20:02

    If you don't have any custom macros or your TBC licence is one of the low tier ones you can convert the string to alignment, then create a corridor, then generate a dummy template (eg. Centre line and 1m offset) and then set the corridor setting to generate cross-section every 1m. 


    you will get a surface, explode it and remove that dummy string. 


    you will be left with a string that is a generalisation of your original strings, but this time with vertices every 1.0m



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    Marian
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    Original Message


  • 9.  RE: what is wrong for this CAD line for earthwork report ??

    Posted 04-13-2023 08:40

    An easy way to see the problem segments is to turn on "Large deflections" in the Project Settings/Display Options/Marking settings. Just zoom way in where you see the line marking.



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    Gary Lantaff
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    Original Message