Direction — direction • terra

The direction (azimuth) to or from the nearest cell that is not NA. The direction is expressed in radians, unless you use argument degrees=TRUE.

Usage

# S4 method for class 'SpatRaster'
direction(x, from=FALSE, degrees=FALSE, filename="", ...)

Arguments

x: SpatRaster
filename: Character. Output filename (optional)
degrees: Logical. If FALSE (the default) the unit of direction is radians.
from: Logical. Default is FALSE. If TRUE, the direction from (instead of to) the nearest cell that is not NA is returned
...: Additional arguments as for writeRaster

Value

SpatRaster

See also

Examples

r <- rast(ncol=36,nrow=18, crs="+proj=merc")
values(r) <- NA
r[306] <- 1
b <- direction(r, degrees=TRUE) 
plot(b)


crs(r) <- "+proj=longlat"
b <- direction(r) 
plot(b)