For example, residential water. Underground water wells, schools, or ancient WAT archaeological sights/attractions and historical places that is based on the phase (Separation Distance Safety), defined.
Such as shelter, water wells, underground temples, schools or archaeological / historical sites. And historic landmarks are within a safe distance (Safety Separation Distance) to set.
Such as housing, water wells underground temples, schools, or archaeological / historical And the historic locations according to a safe distance away (Safety Separation Distance) limit.