The database could use a few updates for the 
Milwaukee, Wisconsin area.  (Some virtual channels, etc., are missing).
Callsign  Real  Virtual  Network
WISN-----34---12.1----ABC
WVTV-----18---18.1----CW
WMVT-----35---36.1----PBS
WIWN------5---68.1----WeatherNation
WYTU-LD--17---63.1----Telemundo
WBME-----24---41.1----MeTV
WMVS-----36---10.11---PBS
Thanks much for providing the database,  maps, etc.  It's very helpful.