{
  "title": "Vienna",
  "era": "Photographed three-mast career, before 1890",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 191.4,
    "beamFeet": 33.8,
    "depthOfHoldFeet": 14.1,
    "beamInferred": false,
    "holdDepthUnknown": false,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -29.16936,
    "hullSternX": 29.16936,
    "deckY": 5.9,
    "waterlineY": 4.1,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -29.236966976285334,
      0.0050000000000000044,
      -5.2361200000000006
    ],
    "max": [
      29.463359999999998,
      32.90385667434522,
      5.2361200000000006
    ]
  },
  "triangleCount": 50986,
  "trianglesByGroup": {
    "hull": 12668,
    "bulwarks": 9620,
    "fittings": 3164,
    "deck": 8466,
    "propulsion": 206,
    "anchors": 636,
    "deckhouses": 5048,
    "pilothouse": 32,
    "pilothouse_roof": 8,
    "steering": 412,
    "stern_gallery": 1282,
    "machinery": 392,
    "standing_rigging": 3408,
    "spars": 3132,
    "cargo_hatches": 120,
    "hatch_covers": 336,
    "ship_boat": 1816,
    "ventilators": 240
  },
  "drawCalls": 51,
  "mastCount": 3,
  "supportsSails": false,
  "visibilityNodes": {
    "hatches": "hatch_covers"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "The photograph guides three masts, the forward pilothouse and single aft funnel. Records describe a later two-mast rig; this is an earlier career form. Original 191.4 ft dimensions are selected; an 1886 record gives 194.4 ft. Exact hull lines, deck layout and colors remain interpreted.",
  "sources": [
    {
      "title": "Historical photograph: Vienna",
      "url": "https://commons.wikimedia.org/wiki/File:Vienna_%28steamer%29.jpg"
    },
    {
      "title": "Great Lakes Vessel History: Vienna",
      "url": "https://www.greatlakesvesselhistory.com/histories-by-name/v/vienna"
    },
    {
      "title": "Vienna historical summary and bibliography",
      "url": "https://en.wikipedia.org/wiki/SS_Vienna_%281873%29"
    }
  ],
  "revisedDate": "2026-09-08",
  "revisionNote": "Added sourced documentary features and repaired metadata and research-note formatting; this collection cleanup is not a new full historical or geometry audit.",
  "documentedFeatures": [
    "Wooden freighter built by Quayle and Martin at Cleveland in 1873, US25875. [Great Lakes Vessel History: Vienna](https://www.greatlakesvesselhistory.com/histories-by-name/v/vienna)",
    "Original dimensions 191.4×33.8×14.1 ft; a second deck was added in 1876 and length remeasured at 194.4 ft in 1886. [Great Lakes Vessel History: Vienna](https://www.greatlakesvesselhistory.com/histories-by-name/v/vienna)"
  ]
}