Contour plot
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.
## S4 method for signature 'SpatRaster' contour(x, maxcells=100000, filled=FALSE, ...) ## S4 method for signature 'SpatRaster' as.contour(x, maxcells=100000, ...)
x |
SpatRaster. Only the first layer is used |
maxcells |
maximum number of pixels used to create the contours |
filled |
logical. If |
... |
any argument that can be passed to |
r <- rast(system.file("ex/elev.tif", package="terra"))
plot(r)
contour(r, add=TRUE)
v <- as.contour(r)
plot(r)
lines(v)
contour(r, filled=TRUE, nlevels=5)
## if you want a SpatVector with contour lines
#template <- disaggregate(rast(r), 10)
#rr <- resample(r, template)
#rr <- floor(rr/100) * 100
#v <- as.polygons(rr)
#plot(v, 1, col=terrain.colors(7))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.