Examples for 'terra::gridDistance'

### ** Examples

# global lon/lat raster
r <- rast(ncol=10,nrow=10, vals=1)
r[48] <- 0
r[66:68] <- NA
d <- gridDistance(r)
plot(d)

# planar
crs(r) <- "+proj=utm +zone=15 +ellps=GRS80 +datum=NAD83 +units=m +no_defs"
d <- gridDistance(r)
plot(d)

# distance to cells that are not NA 
rr <- classify(r, cbind(1, NA))
dd <- gridDistance(rr, NA)