ext.RdGet a SpatExtent of a SpatRaster, SpatVector, or other spatial objects. Or create a SpatExtent from a vector (length=4; order=xmin, xmax, ymin, ymax)
You can set the extent of a SpatRaster, but you cannot set the extent of a SpatVector (see rescale for that). See set.ext to set the extent in place.
# S4 method for SpatRaster
ext(x, cells=NULL)
# S4 method for SpatVector
ext(x)
# S4 method for numeric
ext(x, ..., xy=FALSE)
# S4 method for SpatRaster,SpatExtent
ext(x)<-value
# S4 method for SpatRaster,numeric
ext(x)<-valueSpatRaster
positive integer (cell) numbers to subset the extent to area covered by these cells
SpatExtent, or numeric vector of length four (xmin, xmax, ymin, ymax)
if x is a single numeric value, additional numeric values for xmax, ymin, and ymax
logical. Set this to TRUE to indicate that coordinates are in (xmin, ymin, xmax, ymax) order, instead of in the terra standard order of (xmin, xmax, ymin, ymax)
A SpatExtent object.
r <- rast()
e <- ext(r)
as.vector(e)
#> xmin xmax ymin ymax
#> -180 180 -90 90
as.character(e)
#> [1] "ext(-180, 180, -90, 90)"
ext(r) <- c(0, 2.5, 0, 1.5)
r
#> class : SpatRaster
#> dimensions : 180, 360, 1 (nrow, ncol, nlyr)
#> resolution : 0.006944444, 0.008333333 (x, y)
#> extent : 0, 2.5, 0, 1.5 (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84
er <- ext(r)
round(er)
#> SpatExtent : 0, 3, 0, 2 (xmin, xmax, ymin, ymax)
# go "in"
floor(er)
#> SpatExtent : 0, 3, 0, 2 (xmin, xmax, ymin, ymax)
# go "out"
ceiling(er)
#> SpatExtent : 0, 2, 0, 1 (xmin, xmax, ymin, ymax)
ext(r) <- e