SOLVED Lidar scale issue on track import Blender.

Discussion in 'Tracks' started by Portland12345, Oct 18, 2019.

  1. Portland12345

    Portland12345 New Member

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    Hi.

    I can't seem to get the correct scale out of lidar captured data into blender once its converted to mesh with cloud compare and have no clue where I am doing step wrong.


    So let me explain in screenshots.


    Here is the data source


    Downloaded the las file

    [​IMG]

    Click yes to all on cloud compare import

    [​IMG]

    Intensity, cut out the mesh I want, and convert to xy plane...

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    save it as stl file with binary as option

    [​IMG]


    import stl file with this

    [​IMG]


    and than this happens

    google maps distance 140.02 m

    [​IMG]


    the imported stl file distance 439.05 meters

    [​IMG]
     
  2. Portland12345

    Portland12345 New Member

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    Somewhere I seem to be missing crucial step.
     
  3. Maian

    Maian New Member

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    That seems to be a unit mistake - looks like it imported with values of 'feet' but Blender read it as meters. Looks like that distance is roughly 440 feet, which converts to ~135 meters.
     
    Last edited: Oct 20, 2019
    MGMetroDave and Portland12345 like this.
  4. Portland12345

    Portland12345 New Member

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    OMG you genius!

    of course.

    the data from us national map is in imperial.


    changing the scale to 0.3048 in blender to make it meters works!

    not sure if this can be done in cloud compare to make sure accuracy is even better.
     
    Maian likes this.
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