ext function

Create, get or set a SpatExtent

Get 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. methods

## S4 method for signature 'SpatRaster'
ext(x, cells=NULL)

## S4 method for signature 'SpatVector'
ext(x)

## S4 method for signature 'numeric'
ext(x, ..., xy=FALSE)

## S4 replacement method for signature 'SpatRaster,SpatExtent'
ext(x)<-value

## S4 replacement method for signature 'SpatRaster,numeric'
ext(x)<-value

Arguments

• x: SpatRaster, SpatVector, numeric vector of length four (xmin, xmax, ymin, ymax), or missing (in which case the output is the global extent in lon-lat coordinates)
• cells: positive integer (cell) numbers to subset the extent to area covered by these cells
• value: 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
• xy: 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)

Returns

A SpatExtent object.

Examples

ext()

r <- rast()
e <- ext(r)
as.vector(e)
as.character(e)

ext(r) <- c(0, 2.5, 0, 1.5)
r
er <- ext(r)

round(er)
# go "in"
floor(er)
# go "out"
ceiling(er)

ext(r) <- e