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  "calculated_at": "2026-08-13T02:12:39+00:00",
  "road_source": "wales-discovered-adopted-routes/discovered-lane-53-2001-3-8105.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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   "wg_del_12_279368_20210302dtm.tif",
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   "wg_del_29_278367_20220319dtm.tif",
   "wg_del_29_278368_20220319dtm.tif",
   "wg_del_29_278369_20220319dtm.tif"
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  "elevation_capture_dates": [
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   "07-03-2021",
   "19-03-2022"
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  "notes": "Coarse pass: max 14.6% over 200 m (Terrain 50), gain 39.7 m over 1245 m way. EXTENDED by graph walk: +5 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 2 overlapping proposal(s): discovered-lane-53-1959-3-8168, discovered-lane-53-1984-3-8225 ADOPTED (notable slice 2026-08-11): qualified-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (53.2001, -3.8105)'."
 },
 "confidence": "B"
}