s2_merge: Merge S2 tiles with the same date and orbit
In pobsteta/theia2r: An R toolbox to find, download and preprocess Sentinel-2 data

Description Usage Arguments Value Note Author(s)

The function merge the input Sentinel-2 files with the same date, orbit number, product type and file format. Outputs are a set of products in the same format of corresponding input files.

s2_merge(infiles, outdir = ".", subdirs = NA, tmpdir = NA,
  rmtmp = TRUE, format = NA, compress = "DEFLATE",
  vrt_rel_paths = NA, out_crs = "", parallel = FALSE,
  overwrite = FALSE, .log_message = NA, .log_output = NA)

`infiles`	A vector of input filenames. Input files are paths of products already converted from SAFE format to a format managed by GDAL (use s2_translate to do it); their names must be in the theia2r naming convention (safe_shortname).
`outdir`	(optional) Full name of the output directory where the files should be created (default: current directory). `outdir` can bot be an existing or non-existing directory (in the second case, its parent directory must exists). If it is a relative path, it is expanded from the common parent directory of `infiles`.
`subdirs`	(optional) Logical: if TRUE, differet output products are placed in separated `outfile` subdirectories; if FALSE, they are placed in `outfile` directory; if NA (default), subdirectories are created only if `infiles` relate to more than a single product.
`tmpdir`	(optional) Path where intermediate files (VRT) will be created. Default is a temporary directory.
`rmtmp`	(optional) Logical: should temporary files be removed? (Default: TRUE). This parameter takes effect only if the output files are not VRT (in this case temporary files cannot be deleted, because rasters of source bands are included within them).
`format`	(optional) Format of the output file (in a format recognised by GDAL). Default is to maintain each input format.
`compress`	(optional) In the case a GTiff format is present, the compression indicated with this parameter is used.
`vrt_rel_paths`	(optional) Logical: if TRUE (default on Linux), the paths present in the VRT output file are relative to the VRT position; if FALSE (default on Windows), they are absolute. This takes effect only with `format = "VRT"`.
`out_crs`	(optional) proj4string (character) of the output CRS (default: the CRS of the first input file). The tiles with CRS different from `out_crs` will be reprojected (and a warning returned).
`parallel`	(optional) Logical: if TRUE, the function is run using parallel processing, to speed-up the computation for large rasters. The number of cores is automatically determined; specifying it is also possible (e.g. `parallel = 4`). If FALSE (default), single core processing is used.
`overwrite`	Logical value: should existing output files be overwritten? (default: FALSE)
`.log_message`	(optional) Internal parameter (it is used when the function is called by `theia2r()`).
`.log_output`	(optional) Internal parameter (it is used when the function is called by `theia2r()`).