View lidR LAScatalog Processing Engine Options settings

Question

Is it possible to view the settings for LAScatalog processing engine options settings in the current working environment? For example, what is the default setting for opt_chunk_buffer()?

For example when printing no information is given on the default settings

ctg
#> class       : LAScatalog (v1.2 format 1 and 3)
#> extent      : 195000, 330000, 5432000, 5725000 (xmin, xmax, ymin, ymax)
#> coord. ref. : +proj=tmerc +lat_0=0 +lon_0=-67.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs 
#> area        : 31399.17 km²
#> points      : 204.39 billion points
#> density     : 6.5 points/m²
#> num. files  : 31444 

Answer 1

The summary function gives many informations on the current state of the processing options.

summary(ctg)
#> class       : LAScatalog (v1.2 format 1 and 3)
#> extent      : 195000, 330000, 5432000, 5725000 (xmin, xmax, ymin, ymax)
#> coord. ref. : +proj=tmerc +lat_0=0 +lon_0=-67.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs 
#> area        : 31399.17 km²
#> points      : 204.39 billion points
#> density     : 6.5 points/m²
#> num. files  : 31444 
#> proc. opt.  : buffer: 30 | chunk: 0
#> input opt.  : select: * | filter: 
#> output opt. : in memory | w2w guaranteed | merging enabled
#> drivers     :
#>  - Raster : format = GTiff  
#>  - LAS : no parameter
#>  - Spatial : overwrite = FALSE  
#>  - SimpleFeature : quiet = TRUE  
#>  - DataFrame : no parameter

If you want to get the value for further processing you can call each function individually e.g.

opt_chunk_buffer(ctg)
#> 30

You can also access the storage location. There are 4 slots @processing_options, @chunk_options, @output_options, @input_options. Each containing a list of options (see ?LAScatalog-class)

ctg@processing_options
#> $progress
#> [1] FALSE
#> 
#> $stop_early
#> [1] TRUE
#> 
#> $wall_to_wall
#> [1] TRUE