{
  "name": "Viaduc de Garabit",
  "description": "Federated IFC4X3_ADD2 model of the Garabit viaduct (G. Eiffel, 1880-1884), generated with xeoIFC garabit-gen",
  "crs": {
    "horizontal": "EPSG:2154 (RGF93 v1 / Lambert-93)",
    "vertical": "EPSG:5720 (NGF-IGN69)",
    "conversion": "IfcMapConversionScaled"
  },
  "origin": {
    "easting": 714000.0,
    "northing": 6430700.0,
    "height": 800.0,
    "scale": 0.9992761862
  },
  "sources": [
    "G. Eiffel, Memoire presente a l'appui du projet definitif du viaduc de Garabit (1889), plates 1-19: public domain",
    "IGN LiDAR HD 2025, RGE ALTI, BD TOPO: Licence Ouverte 2.0 (attribution IGN)",
    "SNCF Reseau, Viaduc de Garabit, AFGC 2024 (facts only)"
  ],
  "licence": "CC BY 4.0 (proposed; attribution chain in SOURCES.md)",
  "files": [
    {
      "url": "garabit-00-railway.ifczip",
      "load": true,
      "description": "Alignment (IfcAlignment, clothoids, cant), track and 1500 V DC catenary",
      "bytes": 255475,
      "sha256": "062999362beb70dead4a6eb24f136a91b94efa9da143867068a07a024cad0999"
    },
    {
      "url": "garabit-10-masonry.ifczip",
      "load": true,
      "description": "Approach viaducts, abutments, pier bases, foundations, dressed stones",
      "bytes": 699462,
      "sha256": "95101ca538c3eb27ba6abec0a47ed73f9d771b247488995a8d32b59972919041"
    },
    {
      "url": "garabit-20-arch.ifczip",
      "load": true,
      "description": "Crescent arch, bracing, hinges, palees, central-deck supports",
      "bytes": 2866187,
      "sha256": "003b2f9b1cef96c4565b1c0cc6ea0e1f24d4943489bef01301c28c9f9985d8ac"
    },
    {
      "url": "garabit-21-piers.ifczip",
      "load": true,
      "description": "Iron piers 1-5 with crowns, feet and tie rods",
      "bytes": 2341867,
      "sha256": "c971f6f50b0336a0c73da55034db4491ceb3acb2a4816a20a1381f7487f2b8e1"
    },
    {
      "url": "garabit-22-deck.ifczip",
      "load": true,
      "description": "Three lattice box-girder decks, floor, bracing, walkway, bearings",
      "bytes": 1756680,
      "sha256": "58512d6599da737f9715afe2d7481f1b03e342df609ad007c97dbfe37d73081d"
    },
    {
      "url": "garabit-40-rivets-piers.ifczip",
      "load": true,
      "description": "Rivets and riveted connections of the iron piers",
      "bytes": 5286323,
      "sha256": "dc26b5c085fafcaff5e7c971a3109e08d299b5705ea32701e55d09dcb87162ed"
    },
    {
      "url": "garabit-41-rivets-arch.ifczip",
      "load": true,
      "description": "Rivets and riveted connections of the arch",
      "bytes": 7255849,
      "sha256": "27e1a9347ead4f81a4fc9001edab4cfa305148a78a790182b5840d1ea8c29777"
    },
    {
      "url": "garabit-42-rivets-deck.ifczip",
      "load": true,
      "description": "Rivets and riveted connections of the decks",
      "bytes": 7835908,
      "sha256": "3c5b46798d50a36a975d2501842d02571a695ba324b4dbcba144058e00da7931"
    }
  ]
}