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 "diagnostic_note": "Windows <=3 m are at raster-noise scale (roughly +/-2 pp on a 1 m DTM). Diagnostic use only: never a headline or ranking value.",
 "quality_summary": {
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   "data/cache/wales/dtm_1m/wg_del_7_316358_20210211dtm.tif",
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  "calculated_at": "2026-08-12T23:11:55+00:00",
  "road_source": "trunk-adopted-routes/discovered-lane-53-1190-3-2553.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",
  "elevation_tile_ids": [
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   "wg_del_7_315359_20210211dtm.tif",
   "wg_del_7_316358_20210211dtm.tif",
   "wg_del_7_316359_20210211dtm.tif"
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  "elevation_capture_dates": [
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  "climb_origin": "discovered",
  "notes": "Coarse pass: max 7.4% over 200 m (Terrain 50), gain 116.0 m over 2013 m way. EXTENDED by graph walk: +2 segment(s) at base, +4 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (trunk sweep, Peter's on-sight verdict 2026-08-12): clean table, adopt-all. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (53.1190, -3.2553)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (53.1190, -3.2553)'"
 },
 "area": {
  "place": "Llanbedr-Dyffryn-Clwyd",
  "county": "Sir Ddinbych - Denbighshire"
 }
}