Integration of the Geographical Information System (GIS) of Aras Elektrik Dağıtım A.Ş. (DisCo) with DIgSILENT PowerFactory has been completed. This integration not only enables power system analyses with the update GIS model of the grid but also contributes automatic identification of the missing / incorrect data and semiautomatic correction in the GIS Systen which is critical for other analyses as well.