For elv: produces a single-layer raster with bad coordinates masked to NA. For all other variables: produces 12 layers (one per month), named <varname>_<month>.

For elv: produces a single-layer raster with bad coordinates masked to NA. For all other variables: produces 12 layers (one per month), named <varname>_<month>.

Usage

.dt_to_rast(dt, varname)

Arguments

dt

A tidy data.table with columns: lat, lon, value, and (for non-elv variables) month.

varname

Character scalar: variable identifier (e.g., "tmp", "pre", "elv").

Value

A terra::rast - one layer for elv, 12 layers for all others.