Download BRGM "BD Charm 50" harmonised geology ZIP files

Downloads BRGM ZIP archives for one french department. Files are stored in a persistent cache directory (R_user_dir("Rsequoia2", "cache")).

Usage

download_brgm(
  dep,
  key = "carhab",
  cache = NULL,
  verbose = FALSE,
  overwrite = FALSE
)

Arguments

dep

character or numeric; Department code (see get_cog()).

key

character Source use to download geology from BRGM. Must be one of:

• "carhab" : geological data used to created the CarHab dataset ;

• "bdcharm50" : geological maps, vectorized and harmonised at 1:50,000 scale.

cache

character; Storage directory. Defaults to the user cache directory (see tools::R_user_dir()).

verbose

logical If TRUE, display messages.

overwrite

logical If TRUE, overwrite zipfile.

Value

Character vector of directories where ZIPs are stored.

Details

Existing ZIP files are never re-downloaded.