GEDTM30 global 1-arc-second (~30m) Digital Terrain Model (DTM)
gedtm30(varname = "legendtm_rf_30m", vsi = TRUE)
for 'gedtm30_sources' dataframe of details about the files, for 'gedtm30' one of the variables source urls
gedtm30("hillshade_edtm")
#> Error in gedtm30("hillshade_edtm"): unused argument ("hillshade_edtm")