{
  "mapSnapshot": "2026-09-05T14:38:21Z",
  "coordinateSystem": "WGS84; model metres use origin 6.9583E,50.9385N, x east/z south",
  "assets": [
    {
      "name": "Köln Hauptbahnhof",
      "sourceId": "way/461757215",
      "x": -3.0450000000000017,
      "z": -546.1949999999999,
      "longitude": 6.9582566,
      "latitude": 50.9434065,
      "sources": [
        "https://www.openstreetmap.org/way/461757215",
        "https://www.bahnhof.de/koeln-hbf",
        "https://ahnp.ub.uni-heidelberg.de/journals/icomoshefte/article/view/22612/16373"
      ],
      "detail": "Mapped shed footprint and orientation retained. Procedural barrel roof, steel ribs and purlins, end-screen mullions, platforms, simulated trains, benches, hanging platform signs and entrance glazing. ICOMOS conservation illustrations inform structural detail; small architecture and signage layouts are interpretive, not a measured station survey."
    },
    {
      "name": "Hauptbahnhof entrance",
      "sourceId": "way/176438283",
      "x": -1.0675610342377695,
      "z": -434.41822783259664,
      "longitude": 6.95828478147082,
      "latitude": 50.94240242748682,
      "sources": [
        "https://www.openstreetmap.org/way/176438283",
        "https://www.bahnhof.de/downloads/station-plans/3320.pdf"
      ],
      "detail": "Reception hall footprint and southwest-facing frontage fitted to the mapped Empfangshalle. Height, glazing, canopy, doors and clock are authored estimates, not a measured architectural survey."
    },
    {
      "name": "Groß St. Martin",
      "sourceId": "way/25270980",
      "x": 232.84499999999997,
      "z": -8.265,
      "longitude": 6.9616193,
      "latitude": 50.9385742,
      "sources": [
        "https://www.openstreetmap.org/way/25270980"
      ],
      "detail": "Simplified procedural architecture; anchor is the mapped footprint center."
    },
    {
      "name": "Historisches Rathaus",
      "sourceId": "way/16186002",
      "x": 67.61,
      "z": 54.025,
      "longitude": 6.9592638,
      "latitude": 50.9380147,
      "sources": [
        "https://www.openstreetmap.org/way/16186002"
      ],
      "detail": "Simplified procedural architecture; anchor is the mapped footprint center."
    },
    {
      "name": "Kranhaus Süd",
      "sourceId": "relation/184725",
      "x": 571.875,
      "z": 1393.6,
      "longitude": 6.9664523,
      "latitude": 50.9259811,
      "sources": [
        "https://www.openstreetmap.org/relation/184725"
      ],
      "detail": "Simplified procedural architecture; anchor is the mapped footprint center."
    },
    {
      "name": "Kranhaus Mitte",
      "sourceId": "relation/184729",
      "x": 532.135,
      "z": 1234.63,
      "longitude": 6.9658858,
      "latitude": 50.9274092,
      "sources": [
        "https://www.openstreetmap.org/relation/184729"
      ],
      "detail": "Simplified procedural architecture; anchor is the mapped footprint center."
    },
    {
      "name": "Pandion Vista",
      "sourceId": "relation/3138412",
      "x": 493.845,
      "z": 1075.2150000000001,
      "longitude": 6.96534,
      "latitude": 50.9288412,
      "sources": [
        "https://www.openstreetmap.org/relation/3138412"
      ],
      "detail": "Simplified procedural architecture; anchor is the mapped footprint center."
    },
    {
      "name": "Hohenzollernbrücke",
      "sourceId": "way/485954506,way/872741573",
      "x": 519.4100000000001,
      "z": -327.0225,
      "longitude": 6.9657044,
      "latitude": 50.9414377,
      "sources": [
        "https://www.openstreetmap.org/way/485954506",
        "https://www.openstreetmap.org/way/872741573",
        "https://click-rhein.lvr.de/detail/spot/19181",
        "https://www.stadt-koeln.de/leben-in-koeln/verkehr/bruecken/hohenzollernbruecke"
      ],
      "detail": "Three parallel twin-track lattice arch bridges. Span lengths 118.88, 167.75, 122.56 metres from LVR. Six tracks, piers, cantilevered paths, fences and overhead wiring. Deck elevation and approach slopes are playable approximations, not surveyed terrain. Added masonry courses, steel bearings and hanger plates; detail dimensions are interpretive."
    },
    {
      "name": "Kölner Dom",
      "sourceId": "way/4532022,way/645732604",
      "x": -13,
      "z": -311.696,
      "longitude": 6.9583,
      "latitude": 50.9413,
      "sources": [
        "https://www.koelner-dom.de/erleben/der-dom-in-zahlen",
        "https://whc.unesco.org/en/list/292",
        "https://www.openstreetmap.org/way/4532022"
      ],
      "detail": "Detailed procedural Gothic replacement at the existing local anchor (-13m adjustment from WGS84 reference); approximate footprint and ornament. Official tower heights 157.18m north and 157.22m south, crossing tower109.12m. Pointed windows, tracery, curved flying buttresses, radiating choir chapels, openwork spires and portals use instanced geometry. Primary source major dimensions inform proportions; this is not a laser scan or exact stone-by-stone reconstruction."
    }
  ]
}