updates including overhaul of the visGWDB_hydrolegend.R and enforcement that incoming LEV_SRC_CD are at 10 levels and NAs have been converted to code U; rest of changes are oriented around documentation grammar and maintenance
updates including overhaul of the visGWDB_hydrolegend.R and enforcement that incoming LEV_SRC_CD are at 10 levels and NAs have been converted to code U; rest of changes are oriented around documentation grammar and maintenance