terra (version 1.4-22)

sources: Data sources of a SpatRaster

Description

Get the data sources of a SpatRaster and the number of layers by source. 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.

Usage

# S4 method for SpatRaster
sources(x, bands=FALSE)
# S4 method for SpatRaster
hasValues(x)
# S4 method for SpatRaster
inMemory(x, bylayer=FALSE)

Arguments

x

SpatRaster

bands

logical. If TRUE for each source, the "bands" used, that is, the layers in the source file, are returned

bylayer

logical. If TRUE a value is retured for each layer instead of for each source

Value

sources returns a data.frame with the source names (if any) and the number of layers by source

Examples

# NOT RUN {
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)
# }