Concatenate categorical rasters

Combine two categorical rasters by concatenating their levels.

Usage

# S4 method for SpatRaster
concats(x, y, filename="", ...)

Arguments

x

SpatRaster (with a single, categorical, layer)

y

SpatRaster (with a single, categorical, layer)

filename

character. Output filename

...

additional arguments for writing files as in writeRaster

Value

SpatRaster

See also

cats

Examples

set.seed(0)
r <- rast(nrows=10, ncols=10)
values(r) <- sample(3, ncell(r), replace=TRUE)
levels(r) <- data.frame(id=1:3, cover=c("forest", "water", "urban"))

rr <- rast(r)
values(rr) <- sample(1:3, ncell(rr), replace=TRUE)
levels(rr) <- data.frame(id=c(1:3), color=c("red", "green", "blue"))

x <- concats(r, rr)
x
#> class       : SpatRaster 
#> dimensions  : 10, 10, 1  (nrow, ncol, nlyr)
#> resolution  : 36, 18  (x, y)
#> extent      : -180, 180, -90, 90  (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (CRS84) (OGC:CRS84) 
#> source(s)   : memory
#> categories  : cover_color 
#> name        : cover_color 
#> min value   :  forest_red 
#> max value   :  urban_blue 
levels(x)[[1]]
#>   ID  cover_color
#> 1  0   forest_red
#> 2  1 forest_green
#> 3  2  forest_blue
#> 4  3    water_red
#> 5  4  water_green
#> 6  5   water_blue
#> 7  6    urban_red
#> 8  7  urban_green
#> 9  8   urban_blue