Ii-dimensions zisenokusetyenziswa kumlinganiselo wendawo emi kuyo (ebizwa ngokuba yi-position) loo nto kuthethwa ngayo ngexesha kusenziwa ngalo umlinganiselo-position. Umgama (i-distance) oya kwi-position usuka kwindawo oqala kuyo lo mlinganiselo (ndawo leyo eyaziwa ngokuba si-starting place) umlinganiselo walo mgama usenokwenziwa kubungakanani bayo ngobude, ngobubanzi (ubukhulu ngokwasemacaleni kwanangobude ukubheka phezulu. Le migama ke isetyenziswa ukuze kwenziwe umlinganiselo we-position.