[pdal] large .las files change wheigth

[Andrew Bell]

I suspect you are writing the output file with a different point data
format (dataformat_id option) than the input file. PDAL uses PDRF 3 by
default, but you can set the value as you wish or forward the value from
the input. Please see the documentation:
https://pdal.io/stages/writers.las.html

On Wed, Aug 26, 2020 at 3:57 AM Cesar Ortega <cesar.ortega.chies at gmail.com>
wrote:

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