sources | R Documentation |
Get the data sources of a SpatRaster or SpatVector or related object. Sources are either files (or similar resources) or "", meaning that they are in memory. You can use hasValues
to check if in-memory layers actually have cell values.
## S4 method for signature 'SpatRaster' sources(x, nlyr=FALSE, bands=FALSE) ## S4 method for signature 'SpatVector' sources(x) ## S4 method for signature 'SpatRaster' hasValues(x) ## S4 method for signature 'SpatRaster' inMemory(x, bylayer=FALSE)
x |
SpatRaster, SpatRasterCollection, SpatVector or SpatVectorProxy |
nlyr |
logical. If |
bands |
logical. If |
bylayer |
logical. If |
A vector of filenames, or ""
when there is no filename, if nlyr
and bands
are both FALSE
. Otherwise a data.frame
f <- system.file("ex/elev.tif", package="terra") r <- rast(f) s <- rast(r) values(s) <- 1:ncell(s) rs <- c(r,r,s,r) sources(rs) hasValues(r) x <- rast() hasValues(x)
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