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   "data/cache/wales/dtm_1m/wg_del_1_305346_20200326dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_1_306346_20200326dtm.tif",
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  "calculated_at": "2026-08-13T02:12:23+00:00",
  "road_source": "wales-discovered-adopted-routes/discovered-lane-53-0072-3-3991.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_1_306346_20200326dtm.tif",
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  "elevation_capture_dates": [
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  "route_summit_trim_m": 1284.5,
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  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.7% over 200 m (Terrain 50), gain 52.9 m over 4333 m way. EXTENDED by graph walk: +2 segment(s) at base, +0 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 (53.0072, -3.3991)'."
 },
 "confidence": "B"
}