[pdal] Entwine/EPT build failures

[Andrew Bell]

The first error (about legacy flags) is due to an issue in the LASzip API
code.  You can see this issue https://github.com/PDAL/PDAL/issues/2320 for
details.  You can build the 1.8-maintenance branch of PDAL to eliminate the
error.

The file signature error is what it says.  LAS files have a signature at
the beginning of the file.  If the signature isn't found, your LAS file is
corrupt.

I'm not sure why you'd get a "too many files" open error.  I think this is
an issue in entwine.

On Mon, Feb 18, 2019 at 9:49 AM jrmorreale_ml at enoreth.net <
jrmorreale_ml at enoreth.net> wrote:

> Hi,
>
> I am trying to build an EPT with entwine 2.0 (conda) on a classified lidar
> cloud (1220 tiles, 22billion points) but I did not succeed in getting a
> usable result.
>
> The command used is :
> entwine build --srs "EPSG:2154" --threads "4" --dataType "laszip" -i
> input_dir -o output_dir
>
> The errors are
> * Exception in pool task: writers.las: legacy flags and extended flags are
> not identical
> * During input_xx.laz: readers.las: File signature is not 'LASF', is this
> an LAS/LAZ file?
> * Unable to open stream for 'input_xx.laz' with error 'Too many open files'
>
> The last error is only shown when trying to work on the 1220 files at
> once. The attempts have been made on the original terrascan tiles and on
> pdal translated laz tiles, the generated ept-data output is empty laz files.
>
> pdal info --all of 1 laz tiles
> https://gist.github.com/Jean-Roc/bb045bd1e01edbadf7f49e97df0d2568
>
> pdal info all on the same tile but on the original las file from terrascan
> https://gist.github.com/Jean-Roc/50145b3b7a0b2b432f0b2956807eb181
>
> las sample
> https://dl.lillemetropole.fr/file.php?h=Rc3bb7eeace8c2923b565e2b7ba7f2370
>
> laz sample
> https://dl.lillemetropole.fr/file.php?h=R9e3f147ea2f928b9f4437697faad3e51
>
> log of entwine build on 5 tiles (run 5)
> https://gist.github.com/Jean-Roc/ce231d6770fdaafa5bba307d79c0e992
>
> log of entwine build with on 1220 tiles
> https://gist.github.com/Jean-Roc/29fcffa60886168e73d0e7146e897801
>
> Could you point to the mistake(s) I've made ? My aim is to publish our
> data online, the latest usgs example is a great incentive.
>
> Regards,
> Jean-Roc Morreale _______________________________________________
> pdal mailing list
> pdal at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/pdal



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