distance {raster} | R Documentation |
Calculate 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.
## S4 method for signature 'RasterLayer' distance(x, filename='', doEdge=TRUE, ...)
x |
RasterLayer object |
filename |
Character. Filename for the output RasterLayer (optional) |
doEdge |
Logical. If |
... |
Additional arguments as for |
RasterLayer
distanceFromPoints
, gridDistance
, pointDistance
See the gdistance
package for more advanced distances, and the geosphere
package for great-circle distances (and more) between points in longitude/latitude coordinates.
r <- raster(ncol=36,nrow=18) r[] <- NA r[500] <- 1 dist <- distance(r) #plot(dist / 1000)