Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
             (Supercluster) Virgo Supercluster
               (Cluster) Local Group
                 (Galaxy) Milky Way Galaxy veter.
                   (Spiral arm) Orion Arm
                     (Region) Local Bubble
                       Local Interstellar Cloud
                         (Planetary system) Solar System
                           (Planet-satellite system) Earth System
                             (Planet) Earth veter.
                               "spheres" (Earth)
                                 (Sphere) Hydrosphere (Earth) - layer of water
                                   (Drainage basin) Pacific Ocean Basin
                                     (Drainage basin) Umpqua River Basin (United States: Oregon: Douglas County)
                                       0.434009N1241218W (Stream) Umpqua River (United States: Oregon: Douglas County)
                                       1t.434413N1240443W (Stream) Smith River (United States: Oregon: Douglas County)
                                       2t.433801N1233402W (Stream) Elk Creek (United States: Oregon: Douglas County: Elkton)