Bortigiadas  Bortigiadas (Gallurese: "Bultigghjata", ) is a "comune" (municipality) in the Province of Sassari in the Italian region Sardinia, located about north of Cagliari and about west of Olbia. Bortigiadas borders the following municipalities: Aggius, Perfugas, Santa Maria Coghinas, Tempio Pausania, Viddalba.