raster (version 2.0-41)

buffer: buffer

Description

Calculate a buffer around all cells that are not NA. Note that the distance unit of the buffer width parameter is meters if the RasterLayer is not projected (+proj=longlat), and in map units (typically also meters) when it is projected.

Usage

## S3 method for class 'RasterLayer':
buffer(x, width=0, filename='', doEdge=FALSE, ...)

Arguments

x

RasterLayer object

width

Numeric. Number > 0. Unit is meter if x has a longitude/latitude CRS, or mapunits in other cases

filename

Character. Filename for the output RasterLayer (optional)

doEdge

Logical. If TRUE, the edge function is called first. This may be efficient in cases where you compute a buffer around very large areas. Calling edge determines the edge cells that matter for dista

...

Additional arguments as for writeRaster

Value

• RasterLayer

See Also

distance, gridDistance, pointDistance

Examples

r <- raster(ncol=36,nrow=18)
r[] <- NA
r[500] <- 1
b <- buffer(r, width=5000000) 
#plot(b)