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  "calculated_at": "2026-08-13T02:09:54+00:00",
  "road_source": "wales-discovered-adopted-routes/discovered-lane-51-9554-3-8700.geojson",
  "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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  "route_summit_trim_m": 1416.6,
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  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.8% over 200 m (Terrain 50), gain 22.9 m over 3413 m way. EXTENDED by graph walk: +0 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (notable slice 2026-08-11): qualified-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (51.9554, -3.8700)'."
 },
 "confidence": "B"
}