[pdal] About litree filter output: "PDAL: All points collinear"

[Ulises Ibarra]

Hello everyone:
I have a question about the use of filters.litree. When I run:

$ pdal pipeline ./litree_prueba.json

where de ./litree_prueba.json:

[
       "./input.las"
    {
        "type":"filters.hag_delaunay"
    },
    {
        "type":"filters.sort",
        "dimension":"HeightAboveGround",
        "order":"DESC"
    },
    {
        "type":"filters.litree",
        "min_points":50,
        "min_height":3.0,
        "radius":50.0
    },
    {
        "type":"writers.las",
        "filename":"./output.as",
        "minor_version":4,
        "extra_dims":"all"
    }
]

I get de following output:
"PDAL: All points collinear"

And the file "output.las" was never created.

Could you guide me on what I'm doing wrong, please?

Thank you

Ulises
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/pdal/attachments/20221216/66f2fecb/attachment.htm>