Internal functions used to compute spectral indices and
thumbnails through raster
or stars
features.
calcindex_raster( x, sel_formula, out_file, NAflag = -32768, sel_format = "GTiff", compress = "LZW", datatype = "Int32", bigtiff = FALSE, overwrite = FALSE, minrows = NULL ) calcindex_stars( x, sel_formula, out_file, NAflag = -32768, sel_format = "GTiff", compress = "LZW", datatype = "Int16", bigtiff = FALSE, overwrite = FALSE )
x | Input file path, or |
---|---|
sel_formula | Formula used to compute output raster (specific formats are used - documentation will be improved). |
out_file | Output file path. |
NAflag | (optional) |
sel_format | (optional) Format of the output file (in a format recognised by GDAL). Default "GTiff". |
compress | (optional) In the case a GTiff format is present, the compression indicated with this parameter is used. |
datatype | (optional) Numeric datatype of the output rasters
(see |
bigtiff | (optional) Logical: if TRUE, the creation of a BigTIFF is forced (default is FALSE). This option is used only in the case a GTiff format was chosen. |
overwrite | Logical value: should existing output files be overwritten? (default: FALSE) |
minrows | (optional) parameter passed to |
NULL (the function is called for its side effects)
License: GPL 3.0
L. Ranghetti, M. Boschetti, F. Nutini, L. Busetto (2020). "sen2r": An R toolbox for automatically downloading and preprocessing Sentinel-2 satellite data. Computers & Geosciences, 139, 104473. DOI: 10.1016/j.cageo.2020.104473, URL: http://sen2r.ranghetti.info/.