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 )
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 sen2r naming convention (safe_shortname). |
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prod_type | (optional) Output product (see safe_shortname for the list of accepted products). If not provided, it is retrieved from the file name. |
rgb_type | (optional) For BOA and TOA products, this value determine the type of false colours to be used for the thumbnails:
|
dim | 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
are maintained.
To keep the original size in any case, set |
scaleRange | (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
( |
outdir | (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. |
tmpdir | (optional) Path where intermediate files (VRT) will be created.
Default is a temporary directory.
If |
rmtmp | (optional) Logical: should temporary files be removed? (Default: TRUE) |
overwrite | (optional) Logical value: should existing thumbnails be overwritten? (default: TRUE) |
A vector with the names of the created images.
License: GPL 3.0