{
  "buildings_and_roof_features": {
    "structures": [
      "building",
      "house",
      "apartment",
      "townhouse",
      "shed",
      "garage"
    ],
    "roof_elements": [
      "rooftop",
      "chimney",
      "rooftop_ac_unit",
      "solar_panel",
      "skylight",
      "rooftop_water_tank"
    ],
    "extensions": [
      "balcony",
      "awning"
    ]
  },
  "transportation": {
    "vehicles": [
      "car",
      "truck",
      "van",
      "bus",
      "motorcycle",
      "bicycle",
      "trailer",
      "forklift",
      "boat",
      "ship"
    ],
    "road_surface_components": [
      "road",
      "street",
      "alley",
      "driveway",
      "parking_lot",
      "parking_space",
      "sidewalk",
      "crosswalk",
      "curb",
      "median",
      "road_shoulder",
      "asphalt_patch",
      "lane_marking",
      "arrow_marking",
      "stop_line"
    ],
    "traffic_signs": [
      "stop_sign",
      "yield_sign",
      "speed_limit_sign",
      "one_way_sign",
      "no_entry_sign",
      "pedestrian_crossing_sign",
      "warning_sign",
      "roundabout_sign",
      "detour_sign",
      "construction_sign",
      "directional_sign",
      "parking_sign"
    ],
    "traffic_infrastructure": [
      "traffic_light",
      "traffic_signal",
      "traffic_island",
      "bollard",
      "guardrail",
      "crash_barrier",
      "traffic_cone"
    ],
    "rail_air_port": [
      "railway_track",
      "railroad_switch",
      "railway_crossing",
      "train_platform",
      "runway",
      "taxiway",
      "helipad",
      "dock",
      "pier",
      "jetty"
    ]
  },
  "water_features": [
    "river",
    "stream",
    "creek",
    "pond",
    "lake",
    "pool",
    "fountain",
    "drainage_ditch",
    "stormwater_drain",
    "canal",
    "wetland_patch",
    "water_channel",
    "culvert"
  ],
  "vegetation": {
    "plants": [
      "tree",
      "shrub",
      "bush",
      "hedge",
      "grass",
      "lawn",
      "flower_bed",
      "garden"
    ],
    "agriculture": [
      "crop_row",
      "vineyard_row",
      "orchard_tree",
      "hedge_line",
      "stump"
    ]
  },
  "industrial_and_utilities": [
    "power_pole",
    "powerline",
    "transmission_tower",
    "transformer_box",
    "utility_cabinet",
    "gas_tank",
    "storage_container",
    "dumpster",
    "warehouse_loading_bay",
    "conveyor_belt",
    "crane",
    "industrial_vent",
    "cooling_tower"
  ],
  "recreation_and_urban_amenities": [
    "playground",
    "slide",
    "swing",
    "basketball_court",
    "tennis_court",
    "soccer_goal",
    "baseball_diamond",
    "skate_park",
    "bench",
    "picnic_table",
    "bike_rack",
    "drinking_fountain"
  ],
  "construction_site_features": [
    "construction_vehicle",
    "excavator",
    "bulldozer",
    "dirt_pile",
    "materials_stack",
    "concrete_mixer",
    "rebar",
    "foundation_pit",
    "scaffolding",
    "temporary_fencing",
    "crane"
  ],
  "agricultural_and_rural": [
    "barn",
    "silo",
    "hay_bale",
    "irrigation_pipe",
    "greenhouse",
    "field_plot",
    "tractor",
    "farm_shed",
    "pivot_irrigation_circle",
    "water_trough"
  ],
  "misc_objects": [
    "mailbox",
    "fence",
    "wall",
    "gate",
    "signboard",
    "billboard",
    "lamp_post",
    "trash_can",
    "recycling_bin",
    "shipping_container",
    "canopy",
    "pergola"
  ]
}