raster (version 1.8-3)

distance: Distance

Description

The function calculates the distance for all cells that are NA, to the nearest cell that is not NA. The distance unit is in meters if the RasterLayer is not projected (+proj=longlat) and in map units (typically also meters) when it is projected.

Usage

distance(x, ...)

Arguments

x

a RasterLayer object

...

additional arguments. See Details.

Value

• A RasterLayer object

Details

The following additional arguments can be passed, to replace default values for this function rll{ filename Filename for the output RasterLayer format Character. Output file type. See writeRaster datatype Character. Output data type. See dataType overwrite Logical. If TRUE, "filename" will be overwritten if it exists progress Character. "text", "window", or "" (the default, no progress bar) }

See Also

distanceFromPoints, gridDistance, pointDistance For more advanced distances see the gdistance package (on R-Forge). For great-circle distances (and more) between points in longitude/latitude coordinates, see the geosphere package.

Examples

r <- raster(ncol=36,nrow=18)
r[] <- NA
r[500] <- 1
dist <- distance(r) 
#plot(dist / 1000)