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Draping Center points on surface model

  • June 24, 2018
  • 6 replies
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Hello all

Im trying to Drape 2D FME points, (Which are centre points of trees extracted from LAS data) and trying to drape these points on a Surface model.

At the moments all the points are level under by surface. I cant seem to be able to drape

I have tried using the SurfaceDrapper but my points stay the same level.

Any ideas

Thanks in advance

Best answer by redgeographics

That's odd. Any chance you can share some of your data here so we can have a closer look?

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    6 replies

    redgeographics
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    • redgeographicsCelebrity
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    • June 24, 2018

    That's odd. Any chance you can share some of your data here so we can have a closer look?

    FME rocks! \m/
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    • mortonprice
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    • 10 replies
    • June 25, 2018

    That's odd. Any chance you can share some of your data here so we can have a closer look?

    fme-surfacedraper-workflow.png

     

     

    Attached is the workflow

     

    The surface models is an FBX file, Not sure it thats the problem. However i can drape a textured image onto this FBX file. just not the points

     

     

    redgeographics
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    • redgeographicsCelebrity
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    • June 25, 2018
    fme-surfacedraper-workflow.png

     

     

    Attached is the workflow

     

    The surface models is an FBX file, Not sure it thats the problem. However i can drape a textured image onto this FBX file. just not the points

     

     

    I can't really see anything wrong with your process. Some things I would check:

     

    1. Inspect the FBX file in Data Inspector, see if it's really 3D
    2. Are both input datasets in the same coordinate system? Same vertical units?
    3. Check the points that you're draping, do they already have a z-coordinate from the LAS? If so, remove it by using a 2DForcer.
    The data that comes out of it is 3D if I understand you correctly, is that right?

     

     

    FME rocks! \m/
    M
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    • mortonprice
    • Author
    • 10 replies
    • June 25, 2018
    I can't really see anything wrong with your process. Some things I would check:

     

    1. Inspect the FBX file in Data Inspector, see if it's really 3D
    2. Are both input datasets in the same coordinate system? Same vertical units?
    3. Check the points that you're draping, do they already have a z-coordinate from the LAS? If so, remove it by using a 2DForcer.
    The data that comes out of it is 3D if I understand you correctly, is that right?

     

     

    2D Forcer did the trick, Thank you so much :)

     

     

    redgeographics
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    • June 25, 2018
    2D Forcer did the trick, Thank you so much :)

     

     

    You're welcome! It still kinda odd though, the SurfaceDraper has a parameter that controls what to do with existing Z-values (it can either replace them or offset the new with the old values)

     

     

    FME rocks! \m/
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    • mortonprice
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    • 10 replies
    • June 25, 2018

    @redgeographics it was set to replace Z-values. Im so new to this i couldnt tell you want is and isnt strange. But that you again for your help

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