[pdal] large .las files change wheigth

[Cesar Ortega]

Dear sirs.
The last days, we made a little pipeline to change some metadata from one
17gb .las file.
It worked correctly, but the file now occupies 12 gb. It seems the file has
all the points, returns, intensity.., but weighs much less.

We tried it with more files (2gb,30gg, 5gb...) and always weights much less
after the pipeline.

The pipeline is very simple, only modifies the day of year and saves the
result with another name.

Could someone tell us why it happens, and if it has any effect on the
quality of the file result?

Many thanks
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