Isetshenziselwa ukuhlola, ukuhlola nokulinganisa ukusebenza kokudluliselwa okuguquguqukayo kwendwangu emanzini acwebezelayo. Isekelwe ekuboneni ukumelana namanzi, ukumelana namanzi kanye nokumuncwa kwamanzi okubonakaliswa yisakhiwo sendwangu, okuhlanganisa i-geometry kanye nesakhiwo sangaphakathi sendwangu kanye nezici eziyinhloko zokukhanga kwemicu yendwangu kanye nemicu.