Report NoData value — report_no

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.

Usage

report_no_data(data_dir, var_layer, n_cores = NULL)

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.

References

https://gdal.org/programs/gdalinfo.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)

# 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)