Description Usage Arguments Value Note Author(s)
Internal function to create JPEG or PNG images from a singleband raster file. This function is used by s2_thumbnails, and it will be exported when it would be more generalised.
1 2 | raster2rgb(in_rast, out_file = NULL, palette = "generic_ndsi_2",
minval = -1, maxval = 1, tmpdir = NA)
|
in_rast |
Path of the input multiband raster. |
out_file |
(optional) Path of the output RGB JPEG image; if NULL (default), a RasterLayer will be returned. |
palette |
Path of the palette file to be used (cpt or txt), or character value of a builtin palette ("SCL", "NDVI", the default "generic_ndsi" or "generic_ndsi_2"). |
minval |
(to be implemented) the value corresponding to the minimum value of the palette (for now, only -1 is used). A quantile will be also accepted. |
maxval |
(to be implemented) the value corresponding to the maximum value of the palette (for now, only 1 is used). A quantile will be also accepted. |
tmpdir |
(optional) Path where intermediate files (VRT) will be created. Default is a temporary directory. |
The path of the output image; alternatively, the output image
as RasterLayer (if out_rast = NULL
).
License: GPL 3.0
Luigi Ranghetti, phD (2018) ranghetti.l@irea.cnr.it
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