{
  "source": "https://www.openstreetmap.org/relation/912940",
  "endpoint": "https://api.openstreetmap.org/api/0.6/relation/912940/full",
  "retrievedAt": "2026-11-04T09:08:22Z",
  "rawSha256": "fbdad1c1a2b4147d6cedb5ae4764ab33f3338eb80e19b175e947685f298d29c6",
  "artifactSha256": "764980900c2eedb3be100c93576e3fbebe15f8bdee25d8117618881bd3d6a2c5",
  "osmRelationVersion": 141,
  "crs": "WGS84 / EPSG:4326",
  "coordinateOrder": "longitude, latitude",
  "transformation": "none; exact node-reference assembly, no simplification",
  "license": "ODbL-1.0",
  "attribution": "© OpenStreetMap contributors",
  "licenseUrl": "https://www.openstreetmap.org/copyright",
  "accuracyMeters": null,
  "rings": 3,
  "verticesIncludingClosures": 12594,
  "scope": "Approximate community-mapped Beijing municipality, NOT the smaller urban basemap extent or an authoritative legal boundary",
  "cautionPolicy": "Preview UX uses a conservative 10 km mapped-edge caution band, enlarged for reported GPS uncertainty; unknown GPS accuracy is uncertain. This policy buffer is NOT a measured boundary error or positional-accuracy assertion. Near-edge positions are never asserted outside.",
  "reproduce": "python scripts/build-boundary.py RAW.osm public/map/beijing-boundary.geojson"
}