[pdal] Question on filters.assign

[Andrew Bell]

On Thu, Jan 4, 2024 at 8:29 PM lefsky--- via pdal <pdal at lists.osgeo.org>
wrote:

{  "pipeline":[
>     {"filename":"tile_66_136_sub_01.laz"},
>     { "type":"filters.hag_dem","raster":"tile_66_136_dtm.tif"},
> { "type": "filters.assign","value": ["PassiveZ=Z",
>             "Z=((PassiveZ-8153)/20)+HeightAboveGround"]},
> {       "type":"writers.las",
>         "filename":"tile_66_136_sub_01_hagscale.laz",
>         "compression":"laszip",
>         "extra_dims":"all"}
> ]}
>
>
You didn't say the version you're using but I'm assuming it's not the
current master branch.

The ability to create a dimension with the assign filter was just added.
Until that hits a release, you have to use filters.ferry to create the
dimension. (I hope that) the lack of error display for this case has also
been recently fixed.

Try:

{
  "type": "filters.ferry",
  "dimensions: "Z => PassiveZ"
}

before your assign filter.

-- 
Andrew Bell
andrew.bell.ia at gmail.com
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