lasmerge with large tiled file

[Gregor Schmucki]

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.

Attached there are the files of two tiles, which will be used as input in lasmerge: https://wetransfer.com/downloads/0355d9894656622bb327c9cffd5f222420210716105646/727e854e80355e9a1d1b23c5ac1ab28020210716111359/a225b9

Many thanks for your help.

All the Best,
Gregor

[Martin Isenburg]

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]

many thanks for your fast answer!
I implemented the task now in a python script, which works out nicely.

many thanks,
Gregor