{
  "scene_id": "submitted_public_plaza_001",
  "reference_frame": "gate_reference.jpg",
  "industrial_twin_requirements": {
    "building": {
      "required": true,
      "elements": [
        "city_wall",
        "archway",
        "gate_tower",
        "double_roof",
        "roof_ridge",
        "roof_eaves",
        "upper_balcony",
        "wall_texture_blocks"
      ],
      "demo_status": "photo-textured semantic layer + low-poly geometry proxy"
    },
    "pedestrians": {
      "required": true,
      "elements": [
        "crowd_cluster_left",
        "crowd_cluster_center",
        "gate_entrance_queue",
        "moving_pedestrian_proxies"
      ],
      "demo_status": "segmented proxy layer with dynamic-obstacle semantics"
    },
    "objects": {
      "required": true,
      "elements": [
        "bollards",
        "stone_pavement",
        "tree_right",
        "planter_edge",
        "curb_boundary",
        "roadside_boundary"
      ],
      "demo_status": "semantic object layer + collision/navigation summary"
    },
    "3d_space": {
      "required": true,
      "elements": [
        "walkable_plaza_surface",
        "gate_approach_corridor",
        "archway_passage",
        "restricted_vehicle_zone",
        "crowd_high_cost_zone",
        "robot_route_spline"
      ],
      "demo_status": "perspective grid + route/cost overlays + simulator export skeleton"
    }
  },
  "demo_limits": [
    "This is a photo-textured industrial demo, not final metric photogrammetry.",
    "The uploaded video is only 9.14 seconds; high-fidelity reconstruction should use 30 seconds to 5 minutes of slow camera motion.",
    "Scale must be calibrated with a known marker or manual measurement in a paid pilot."
  ]
}