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Showing content from https://github.com/r-lidar/lidR/issues/563 below:

error in retile_catalog when using flight lines · Issue #563 · r-lidar/lidR · GitHub

Hi,

I am trying to retile flight transects using catalog_retile, but the following error arises:

newctg2 = catalog_retile(ctg2)
#>  |====================================================================| 100%
#>  missing value where TRUE/FALSE needed
#>  Warning message:
#>  An error occured during the automatic merge of 'catalog_apply'. Merging is impossible. A list has been returned.

It worked when I used only one flight transect tho. It also worked when I used a dataset of tiles.

Here is the code I used (which is basically the original example from the retile a LAScatalog documentation):

library(lidR)

# catalog with 2 flight lines
ctg = readLAScatalog("Test_2flight_lines")
plot(ctg)

# Create a new set of 500 x 500 m .las files
opt_chunk_buffer(ctg) <- 0
opt_chunk_size(ctg) <- 500                       
opt_filter(ctg) <- ""                              
opt_laz_compression(ctg) <- TRUE
opt_chunk_alignment(ctg) <- c(0,0) 
opt_output_files(ctg) <- paste0(tempdir(), "/retile_{XLEFT}_{YBOTTOM}") 

# preview the chunk pattern
plot(ctg, chunk = TRUE)

newctg = catalog_retile(ctg)
plot(newctg)

🔗 link to the data

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