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  "calculated_at": "2026-08-12T09:12:05+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/wales-2026-08-11.osm.pbf",
  "osm_snapshot": "2026-08-10T20:21:40Z",
  "elevation_provider": "Welsh Government",
  "elevation_dataset": "Welsh Government LiDAR 1m DTM (2020-2023)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Crown copyright Welsh Government",
  "elevation_catalogue_layer": "geonode:welsh_government_lidar_tile_catalogue_2020_2023",
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  "elevation_capture_dates": [
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  "notes": "Promoted automatically from triage verdict=validated. Named from nearest OSM place node (Blaen-y-Glyn); originally unnamed at (51.8458, -3.3673). EXTENDED by graph walk: +1 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting."
 },
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  "county": "Powys - Powys"
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   "source_name": "OSM incline tag -20% (editors=1, first tagged 2021-03-13)",
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   "observed_via": "osm_tag_history",
   "retrieved_at": "2026-08-10T20:21:40Z"
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}