lasmerge with large tiled file

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Gregor Schmucki

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Jul 16, 2021, 11:57:16 AMJul 16
to LAStools - efficient tools for LiDAR processing

hello,

I'm working with a large UAV photogrammetric dataset.
To speed up the calculation time, I have tiled my dataset and tried to run it on tiles.

Unfortunately an error was raised while running lasmerge:
lasmerge64 -i *_vegindex_2G-RB_green_c_height_ground_a.laz *_vegindex_2G-RB_green_c_height.laz -o* _merge.laz

My aim is to merge each tile seperatly and not to merge all tiles together to one file.
In a following step, I'm removing all dublicates in each tile with lasduplicate.


Many thanks for your help.

All the Best,
Gregor

Martin Isenburg

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Jul 16, 2021, 1:00:08 PMJul 16
to LAStools - efficient command line tools for LIDAR processing
Hello,

The way lasmerge works is that it will take a number of files as input and produce a single output file. The way you use the wildcard * above, seemingly hoping that each two input files with a certain name will be merged into one output file with the renaming handling implicitly is not going to happen. You will have to run as many individual lasmerge calls as you have pairs of files.

Regards,

Martin

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Gregor Schmucki

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Jul 16, 2021, 6:30:19 PMJul 16
to LAStools - efficient tools for LiDAR processing
many thanks for your fast answer!
I implemented the task now in a python script, which works out nicely.

many thanks,
Gregor
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