terra (version 0.3-7)

contour: Contour plot

Description

Contour lines of a SpatRaster. Use add=TRUE to add the lines to the current plot. See contour for details.

if filled=TRUE, a new filled contour plot is made. See filled.contour for details.

as.contour returns the contour lines as a SpatVector.

Usage

# S4 method for SpatRaster
contour(x, maxcells=100000, filled=FALSE, ...)
# S4 method for SpatRaster
as.contour(x, maxcells=100000, ...)

Arguments

x

SpatRaster. Only the first layer is used

maxcells

maximum number of pixels used to create the contours

filled

logical. If TRUE, a filled.contour plot is made

...

any argument that can be passed to contour or filled.contour (graphics package)

See Also

plot

Examples

# NOT RUN {
r <- rast(system.file("exdata/test.tif", package="terra"))
plot(r)
contour(r, add=TRUE)

v <- as.contour(r)
plot(r)
lines(v)

contour(r, filled=TRUE, nlevels=5)
# }