Set no data value — set_no_data • hydrographr

Change or set the NoData value for a raster layer. The change happens in-place, meaning that the original file is overwritten on disk.

Usage

set_no_data(data_dir, var_layer, no_data, quiet = TRUE)

Arguments

data_dir: character. Path to the directory containing all input data.
var_layer: character vector of variable layers on disk, e.g. c("sti_h16v02.tif", "slope_grad_dw_cel_h00v00.tif"). The original files will be overwritten.
no_data: numeric. The desired NoData value.
quiet: logical. If FALSE, the standard output will be printed. Default is TRUE.

References

https://gdal.org/programs/gdal_edit.html

Author

Afroditi Grigoropoulou, Marlene Schürz

Examples

# Download test data into the temporary R folder
# or define a different directory
my_directory <- tempdir()
download_test_data(my_directory)

# Define no data value
set_no_data(data_dir = paste0(my_directory, "/hydrography90m_test_data"),
            var_layer = "cti_1264942.tif",
            no_data = -9999)