ext: Create, get or set a SpatExtent

In rspatial/terra: Spatial Data Analysis

Create, get or set a SpatExtent

Description

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.

Usage

## 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)

Value

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

rspatial/terra documentation built on Feb. 9, 2025, 4:06 p.m.