Translate cover code into percentage cover values for Turboveg database observations.
tv.coverperc(db, obs, RelScale, tv_home, tvscale, ...)data.frame of observations with additional column COVER_PERC
the name of the Turboveg database
dataframe of observations, containing Cover Codes, coded in tvscale.dbf of Turboveg installation
Dataframe of CoverScale codes per releve, if empty it is read from the database
Path to Turboveg installation
Cover scale
Further options