StatisticsError('must have at least two data points') about pdal-parallelizer HOT 3 CLOSED

Amazing!

Thank you @ClementAlba for the comprehensive response and rapid fix.

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Hi @ash-datasight,

At the end of a process, pdal-parallelizer looks at your output directory to remove empty files (those with 0 dots), and to do this, it creates deciles based on the size of the output files to speed up the process.

Here you are trying to process a single cloud while not specifying any value for the tile_size option, so the default value of 256 by 256 meters is used here for the size of the tiles. According to the documentation (https://pdal-parallelizer.readthedocs.io/en/latest/cli.html#processing-pipelines-with-pdal-parallelizer-cli):

-ts, -tile_size

Tile size [default=(256,256)] (single file only)

I assume your points cloud's dimensions are smaller than this value, so at the end of the execution, there is only one file in your output directory and that's why the error occurs: it's impossible to build deciles with a single file.

Solution:

Try reducing the size of the tiles by giving a value to the -ts option. For example:

pdal-parallelizer process-pipelines -c /work/test/data_1/pdal-parallelizer.json -it single -ts 10 10

This command will split your point cloud into 10 by 10 meters tiles.

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I will work on this. See #48

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