terra: sources – R documentation

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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 actualy have values.

Usage

## S4 method for signature 'SpatRaster'
sources(x)

## S4 method for signature 'SpatRaster'
hasValues(x)

Arguments

`x`	SpatRaster

Value

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

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)

terra

Spatial Data Analysis

v1.2-10

GPL (>= 3)

Authors

Robert J. Hijmans [cre, aut] (<https://orcid.org/0000-0001-5872-2872>), Roger Bivand [ctb] (<https://orcid.org/0000-0003-2392-6140>), Karl Forner [ctb], Jeroen Ooms [ctb] (<https://orcid.org/0000-0002-4035-0289>), Edzer Pebesma [ctb] (<https://orcid.org/0000-0001-8049-7069>)

Initial release

2021-05-12