process_dem.RdPerform initial computations on a Digital Elevation Model This function relies on the following GRASS GIS modules : r.watershed, r.stream.distance (add-on to be installed)
process_dem(dem, th_px, gisbase, precip = NULL, to_net = FALSE)
| dem | Digital Elevation Model (SpatRaster) |
|---|---|
| th_px | Accumulation threshold in pixels to initiate a stream (integer) |
| gisbase | The directory path to GRASS binaries and libraries, containing bin and lib subdirectories among others |
| precip | precipitation raster (m/a) to be used for annual discharge computation |
| to_net | Flag to compute distance to network (`dtn`) and elevation above network (`ean`) (optional) |
A SpatRaster with the following layers: `z` (DEM), `acc` (flow accumulation), `dir` (flow direction), `dist` (distance along network), `st_id` (stream id), `sto` (Strahler orders of the stream segments), `bs_id` (sub basin id) Optionally