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Diagnostic use only: never a headline or ranking value.", "quality_summary": { "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.38, "obstruction_max_height_m": 32.17, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "structure_suppression": { "masked_fraction": 0.007, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0, 50.0, 100.0 ], "windows_unresolved": [] }, "no_bench_suppression": { "masked_fraction": 0.161, "windows_resited": [ 5.0, 10.0, 20.0, 25.0, 50.0, 100.0 ], "windows_unresolved": [] }, "excluded_ranges_m": [ [ 330.0, 410.0 ], [ 420.0, 610.0 ], [ 659.0, 664.0 ], [ 695.0, 701.0 ], [ 740.0, 800.0 ], [ 900.0, 930.0 ], [ 1030.0, 1110.0 ], [ 1230.0, 1310.0 ], [ 1560.0, 1590.0 ], [ 1660.0, 1710.0 ], [ 2042.0, 2047.0 ], [ 2096.0, 2101.0 ], [ 2580.0, 2750.0 ], [ 2980.0, 3140.0 ], [ 4620.0, 4626.0 ] ], "review": [], "extent": [ "may_start_earlier", "descends_at_end" ] }, "provenance": { "analysis_version": "0.1.0", "sample_interval_m": 1.0, "interpolation": "bilinear", "smoothing": "none", "gradient_windows_m": [ 5.0, 10.0, 20.0, 25.0, 50.0, 100.0 ], "diagnostic_windows_m": [ 2.0, 3.0 ], "elevation_crs": "EPSG:27700", "elevation_resolution_m": 1.0, "elevation_tiles": [ "data/cache/wales/dtm_1m/wg_del_1_319339_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_319340_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_319341_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_319342_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_319343_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_320339_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_320340_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_320341_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_320342_20200326dtm.tif", "data/cache/wales/dtm_1m/wg_del_1_320343_20200326dtm.tif" ], "calculated_at": "2026-08-12T09:09:31+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", "elevation_tile_ids": [ "wg_del_1_319339_20200326dtm.tif", "wg_del_1_319340_20200326dtm.tif", "wg_del_1_319341_20200326dtm.tif", "wg_del_1_319342_20200326dtm.tif", "wg_del_1_319343_20200326dtm.tif", "wg_del_1_320339_20200326dtm.tif", "wg_del_1_320340_20200326dtm.tif", "wg_del_1_320341_20200326dtm.tif", "wg_del_1_320342_20200326dtm.tif", "wg_del_1_320343_20200326dtm.tif" ], "elevation_capture_dates": [ "26-03-2020" ], "climb_origin": "discovered", "notes": "Coarse pass: max 15.8% over 200 m (Terrain 50), gain 272.6 m over 5970 m way. EXTENDED by graph walk: +1 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-52-9701-3-1801, willow-street ADOPTED (notable slice 2026-08-11): big-gain. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (52.9659, -3.1943)'.", "renamed": "2026-08-13: 'Barber's Hill' adopted over auto-name 'Berwyn to Blaen-Bache Dingle' \u2014 1950 National HC venue evidence; human decision" }, "area": { "place": "The Dingle", "county": "Sir Ddinbych - Denbighshire" }, "reported_claims": [], "confidence": "B", "shape": { "ascent_concentration": 0.41, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 247.0, "shape_class": "sustained" } }