sources function

Data sources of a SpatRaster

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. methods

## 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)

Arguments

• x: SpatRaster, SpatRasterCollection, SpatVector or SpatVectorProxy
• nlyr: logical. If TRUE for each source, the number of layers is returned
• bands: logical. If TRUE for each source, the "bands" used, that is, the layer number in the source file, are returned
• bylayer: logical. If TRUE a value is returned for each layer instead of for each source

Returns

A vector of filenames, or "" when there is no filename, if nlyr and bands are both FALSE. Otherwise a data.frame

See Also

toMemory

Examples

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)