This function reports the defined NoData value of a raster layer. The NoData value of a raster layer represents the absence of data. In computations the NoData value can be treated in different ways. Either the NoData value will be reported or the Nodata value will be ignored and a value is computed from the available values of a specified location.
Arguments
- data_dir
character. Path to the directory containing all input data.
- var_layer
character vector of variable raster layers on disk, e.g. "slope_grad_dw_cel_h00v00.tif".
- n_cores
numeric. Number of cores used for parallelization, in case multiple .tif files are provided to var_layer.
Examples
# Download test data into the temporary R folder
# or define a different directory
my_directory <- tempdir()
download_test_data(my_directory)
# Report the NoData value
report_no_data(data_dir = paste0(my_directory, "/hydrography90m_test_data"),
var_layer = c("subcatchment_1264942.tif", "flow_1264942.tif",
"spi_1264942.tif"),
n_core = 2)