{
  "title": "Northern Bund walk and Huangpu Park memorial approach",
  "coordinate_contract": "x=359-nativeNorth; z=-1128-nativeEast; metres",
  "source_paths": [
    909213000,
    906417852,
    177931018,
    679361566,
    679361567,
    27498117
  ],
  "park_footprint": "https://www.openstreetmap.org/way/178411796",
  "monument_location": {
    "source": "center of mapped concentric memorial footpaths",
    "local_xz": [
      -417,
      -86
    ],
    "wgs84_lonlat": [
      121.4869501,
      31.244271
    ]
  },
  "monument_geometry": "Three photograph-informed leaning granite blades using the mapped projected orientations, outer anchors and height=24 tags. The overhead polygons are not assumed to be ground-contact outlines: inferred ground contacts occupy the outer30% of each radial span, leaving open gaps beneath the blades. Both edges lean inward to narrow flat tips. Ground contacts, angular base and inner recessed strips are approximations. Not a survey or measured reproduction. Published height conflict (24 m / 50 m / 60 m) remains unresolved.",
  "semantic_context_replacements": [
    "osm-way-524424597",
    "osm-way-524424600",
    "osm-way-524424604",
    "osm-way-160033736"
  ],
  "waterfront_platform": {
    "id": "osm-way-160033736",
    "source_tags": {
      "building": "yes"
    },
    "source_height": "No height or level tag. The former 12 m office-like block was a baseline default, not source evidence.",
    "representation": "Exact mapped footprint retained as a low waterfront platform at the common upper-walk datum; inference from waterfront planning, not a verified identification of the individual service space."
  },
  "source_facts": [
    {
      "url": "https://english.shanghai.gov.cn/en-ScenicSpots/20231222/3c838927c4f047498c47a9c0943caf45.html",
      "fact": "Monument is in Huangpu Park at the Huangpu / Suzhou confluence, 500 Zhongshan East No.1 Road."
    },
    {
      "url": "https://english.shanghai.gov.cn/cmsres/ac/ac79b11bea04488aa2d716ef1263c631/434b2ca13ebd51eb6ff2a2a084cb76be.jpg",
      "fact": "Municipal page photograph informed the continuously leaning tapered blade profile and narrow upper gaps; photograph is referenced only, not bundled or used as a texture."
    },
    {
      "url": "https://sghimages.shobserver.com/img/catch/2026/04/05/c41842f1-add7-4e54-ab11-065e13930d90.jpg",
      "fact": "Jiefang photograph informed the angular granite base and inscription beam. Perspective photographs do not establish metric height; image is not bundled."
    },
    {
      "url": "https://www.meet-in-shanghai.net/cn/news/the-lighting-renovation-of-the-peoples-heroes-memorial-tower-was-completed-937794/",
      "fact": "2021 lighting renovation uses red wash and gold accents; runtime illumination is an original restrained interpretation."
    },
    {
      "url": "https://www.openstreetmap.org/way/524424597",
      "fact": "All three mapped memorial arm footprints 524424597, 524424600 and 524424604 have height=24. The generic building=yes tag previously caused office-like extrusion; these are now semantic memorial replacements."
    },
    {
      "url": "https://ghzyj.sh.gov.cn/ghgs/20191231/0032-174998.html",
      "fact": "The official 2008 waterfront design describes continuous walks on platform tops and ramps, with service spaces below. Used as evidence for a disclosed low-platform interpretation of heightless waterfront footprint160033736."
    },
    {
      "url": "https://shhongse.fudan.edu.cn/info/1097/2086.htm",
      "fact": "Conflicting 60 m height; no surveyed dimension established."
    }
  ],
  "limits": [
    "Only the upper approach and annular plaza are walkable; lower level -1 paths are excluded.",
    "Path furniture, planting locations, paving widths, bridge superstructure and all ground elevations are inferred.",
    "Mapped water polygons and geographic building positions are unchanged.",
    "The source park outline and source footpath bends control placement; no straight northern extension is invented."
  ],
  "attribution": "Map geometry © OpenStreetMap contributors, ODbL 1.0. https://www.openstreetmap.org/copyright"
}