GPS zamanye so dǝn awola suro dǝro tǝkǝna mbeji, shi dǝ men raksa bayan kǝla na kǝrmaro dasana dǝye suwondayin datǝ geoid dǝye nazayin (misallo geoid EGM-96) kǝla fasal geoid ye dinaye (WGS) ellipsoid ye dǝn.