Function to create thumbnail images for Sentinel-2 products. BOA and TOA multiband images are rendered as false colour JPEG images; SCL maps are rendered as 8-bit PNG; other singleband images (like spectral indices) are rendered as JPEG images with a standard colour palette. Output images are georeferenced.
s2_thumbnails(infiles, prod_type = NA, rgb_type = "SwirNirR", dim = 1024, scaleRange = NA, outdir = NA, tmpdir = NA, rmtmp = TRUE, overwrite = FALSE)
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 sen2r naming convention (safe_shortname).
(optional) Output product (see safe_shortname for the list of accepted products). If not provided, it is retrieved from the file name.
(optional) For BOA and TOA products, this value determine the type of false colours to be used for the thumbnails:
Integer value, with the maximum greater dimension in pixels (width or
height) of the output images (default: 1024 px).
If this is lower than the corresponding dimension of the maps, maps are
rescaled before producing the thumbnails; otherwise the original dimensions
To keep the original size in any case, set
(optional) Range of valid values. If not specified
(default), it is automatically retrieved from the product type.
Default ranges for BOA and TOA products are 0 to 8000
(optional) Full name of the existing output directory where the files should be created. Default is a subdirectory (named "thumbnails") of the parent directory of each input file.
(optional) Path where intermediate files (VRT) will be created.
Default is a temporary directory.
(optional) Logical: should temporary files be removed? (Default: TRUE)
(optional) Logical value: should existing thumbnails be overwritten? (default: TRUE)
A vector with the names of the created images.
License: GPL 3.0