direction: Direction

In terra: Spatial Data Analysis

Direction

Description

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 signature '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

distance

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)

terra documentation built on Oct. 13, 2023, 5:08 p.m.