Flip or reverse a raster — flip • terra

Flip the values of a SpatRaster by inverting the order of the rows (vertical=TRUE) or the columns (vertical=FALSE).

rev is the same as a horizontal *and* a vertical flip.

# S4 method for SpatRaster
flip(x, direction="vertical", filename="", ...)

# S4 method for SpatVector
flip(x, direction="vertical")

# S4 method for SpatRaster
rev(x)

Arguments

x: SpatRaster or SpatVector
direction: character. Should (partially) match "vertical" to flip by rows, or "horizontal" to flip by columns
filename: character. Output filename
...: additional arguments for writing files as in writeRaster

Value

SpatRaster

See also

trans, rotate

Examples

r <- rast(nrow=18, ncol=36)
m <- matrix(1:ncell(r), nrow=18)
values(r) <- as.vector(t(m))
rx <- flip(r, direction="h")

values(r) <- as.vector(m)
ry <- flip(r, direction="v")

v <- rev(r)