A quadrant system where the prime vertical are formed by great circles passing through the north and south points of the horizon and through a set of points space at 30?° steps along the prime vertical beginning at the zenith and proceeding eastward through the east point of the horizon. The cusps are located at the intersections of these house circles with the ecliptic. This system is ill-defined at extreme (polar) latitudes.
Comments: Campanus House System