Change values in a file
update.Rd
Change the contents of a file that is the data source of a SpatRaster. BE CAREFUL as you are overwriting values in an existing file.
Examples
s <- rast(system.file("ex/logo.tif", package="terra"))
fname <- paste0(tempfile(), ".tif")
x <- writeRaster(s, fname)
names(x) <- c("A", "B", "C")
ext(x) <- ext(x) + 1
crs(x) <- "+proj=utm +zone=1"
update(x, names=TRUE, crs=TRUE, extent=TRUE)
rast(fname)
#> class : SpatRaster
#> dimensions : 77, 101, 3 (nrow, ncol, nlyr)
#> resolution : 1.019802, 1.025974 (x, y)
#> extent : -1, 102, -1, 78 (xmin, xmax, ymin, ymax)
#> coord. ref. : WGS 84 / UTM zone 1N (EPSG:32601)
#> source : file3ba2f7cbb8a.tif
#> colors RGB : 1, 2, 3
#> names : red, green, blue
#> min values : 0, 0, 0
#> max values : 255, 255, 255