[pdal] wrong classflags after crop

[Csaba Sandor]

Dear List,

I'm trying to crop a point cloud in laz format with a polygon in pdal 1.8.0.

In the result I get some "withheld" and "keypoint" classified points which
were not classified as such in the original laz.

Any idea on why can this happen?

Tried to search for solution but I'm a very beginner in the pointcloud
world and maybe I'm missing the proper keywords.

This is my pipeline:

{
  "pipeline":[
    {
      "type":"readers.las",
      "filename":"43-233_dfm_2018.laz",
      "spatialreference":"epsg:23700"
    },
    {
      "type":"filters.crop",
      "polygon":"Polygon ((...))"
    },
    {
      "type":"writers.las",
      "filename":"cut_43-233_dfm_2018.laz",
      "forward": "major_version, minor_version, dataformat_id,
filesource_id, global_encoding, project_id, system_id, software_id,
creation_doy, creation_year, scale_x, scale_y, scale_z, offset_x, offset_y,
offset_z"

    }
  ]
}

Original and cropped file:
https://nas.fototerkep.hu:8000/share.cgi?ssid=0YEW1W4

Thank you very much for any hint!
Csaba


Sándor Csaba
Tel: +3630/9605853
Fax: +3617002542
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