sel {terra}

R Documentation

Spatial selection

Description

Geometrically subset SpatRaster or SpatVector (to be done) by drawing on a plot (map).

Usage

## S4 method for signature 'SpatRaster'
sel(x, ...)

## S4 method for signature 'SpatVector'
sel(x, use="rec", draw=TRUE, col="cyan", ...)

Arguments

x	SpatRaster or SpatVector
use	character indicating what to draw. One of "rec" (rectangle) or "pol" (polygon)
draw	logial. If TRUE the selection is drawn on the map
col	color to be used for drawing if draw=TRUE
...	additional graphics arguments for drawing

Value

SpatRaster or SpatVector

See Also

crop and intersect to make an intersection and click and text to see cell values or geometry attributes

Examples

Run examples

## Not run: 
# select a subset of a SpatRaster
r <- rast(nrows=10, ncols=10)
values(r) <- 1:ncell(r)
plot(r)
s <- sel(r) # now click on the map twice

# plot the selection on a new canvas:
x11()
plot(s)

# vector
f <- system.file("ex/lux.shp", package="terra")
v <- vect(f)
plot(v)
x <- sel(v) # now click on the map twice
x

## End(Not run)

---