If the continental land masses were crisscrossed by a series of tunnels or canals, the sea level in those canals would also very nearly coincide with the geoid.
A fal tikunen n idăɣan win amădal eɣlăyan tan id tijursăyen n iɣešan, iddikud n ejjărew wa maqqorăn daɣ iɣešăn win inta deɣ a izli har hin ehaz geoid