{ "ocl_version": "0.1.0", "name": "Shapcott Wood Hill", "slug": "shapcott-wood-hill", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 40.86532520161086, "diagnostic": true, "flags": [], "start_distance_m": 521.0, "end_distance_m": 523.0, "start_elevation_m": 174.92105567577624, "end_elevation_m": 175.73836217980846, "min_gradient_pct": -8.50272174141935 }, { "window_m": 3.0, "max_gradient_pct": 36.214963218902575, "diagnostic": true, "flags": [], "start_distance_m": 521.0, "end_distance_m": 524.0, "start_elevation_m": 174.92105567577624, "end_elevation_m": 176.00750457234332, "min_gradient_pct": -7.041016592305975 }, { "window_m": 5.0, "max_gradient_pct": 30.351896411856387, "diagnostic": false, "flags": [], "start_distance_m": 521.0, "end_distance_m": 526.0, "start_elevation_m": 174.92105567577624, "end_elevation_m": 176.43865049636906, "min_gradient_pct": -3.802363576991752 }, { "window_m": 10.0, "max_gradient_pct": 26.46285838572254, "diagnostic": false, "flags": [], "start_distance_m": 515.0, "end_distance_m": 525.0, "start_elevation_m": 173.65887567616178, "end_elevation_m": 176.30516151473404, "min_gradient_pct": -2.340234151023708 }, { "window_m": 20.0, "max_gradient_pct": 21.383460745591805, "diagnostic": false, "flags": [], "start_distance_m": 510.0, "end_distance_m": 530.0, "start_elevation_m": 172.86007661070886, "end_elevation_m": 177.13676875982722, "min_gradient_pct": -0.5206904702804138 }, { "window_m": 25.0, "max_gradient_pct": 20.12171289733317, "diagnostic": false, "flags": [], "start_distance_m": 506.0, "end_distance_m": 531.0, "start_elevation_m": 172.27316200059417, "end_elevation_m": 177.30359022492746, "min_gradient_pct": -0.3261195002061186 }, { "window_m": 50.0, "max_gradient_pct": 18.2545238374463, "diagnostic": false, "flags": [], "start_distance_m": 544.0, "end_distance_m": 594.0, "start_elevation_m": 178.54353094996912, "end_elevation_m": 187.67079286869227, "min_gradient_pct": 0.3763687457837932 }, { "window_m": 100.0, "max_gradient_pct": 17.253835984894152, "diagnostic": false, "flags": [], "start_distance_m": 510.0, "end_distance_m": 610.0, "start_elevation_m": 172.86007661070886, "end_elevation_m": 190.113912595603, "min_gradient_pct": 1.1472070436254285 } ], "shape": { "ascent_concentration": 0.502, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 155.0, "shape_class": "stepped" }, "length_m": 748.8250840146301, "start_elevation_m": 147.03501138809145, "end_elevation_m": 204.39520354154809, "endpoint_gain_m": 57.36019215345664, "overall_gradient_pct": 7.6600254689566425, "accumulated_ascent_m": 59.62787817046507, "window_maxima": { "max_5m": { "gradient_pct": 30.351896411856387, "start_distance_m": 521.0, "end_distance_m": 526.0, "midpoint_distance_m": 523.5, "start_elevation_m": 174.92105567577624, "end_elevation_m": 176.43865049636906, "start_xy": [ 281861.56838487467, 123448.54153850072 ], "end_xy": [ 281866.5590292385, 123448.2358117699 ] }, "max_10m": { "gradient_pct": 26.46285838572254, "start_distance_m": 515.0, "end_distance_m": 525.0, "midpoint_distance_m": 520.0, "start_elevation_m": 173.65887567616178, "end_elevation_m": 176.30516151473404, "start_xy": [ 281855.5796116381, 123448.90841057771 ], "end_xy": [ 281865.5609003657, 123448.29695711608 ] }, "max_20m": { "gradient_pct": 21.383460745591805, "start_distance_m": 510.0, "end_distance_m": 530.0, "midpoint_distance_m": 520.0, "start_elevation_m": 172.86007661070886, "end_elevation_m": 177.13676875982722, "start_xy": [ 281850.64241636323, 123448.49563496467 ], "end_xy": [ 281870.5515447295, 123447.99123038526 ] }, "max_25m": { "gradient_pct": 20.12171289733317, "start_distance_m": 506.0, "end_distance_m": 531.0, "midpoint_distance_m": 518.5, "start_elevation_m": 172.27316200059417, "end_elevation_m": 177.30359022492746, "start_xy": [ 281846.7300336898, 123447.66301151043 ], "end_xy": [ 281871.5496736023, 123447.93008503909 ] }, "max_50m": { "gradient_pct": 18.2545238374463, "start_distance_m": 544.0, "end_distance_m": 594.0, "midpoint_distance_m": 569.0, "start_elevation_m": 178.54353094996912, "end_elevation_m": 187.67079286869227, "start_xy": [ 281884.5253489482, 123447.13519553897 ], "end_xy": [ 281933.7378044185, 123438.620774466 ] }, "max_100m": { "gradient_pct": 17.253835984894152, "start_distance_m": 510.0, "end_distance_m": 610.0, "midpoint_distance_m": 560.0, "start_elevation_m": 172.86007661070886, "end_elevation_m": 190.113912595603, "start_xy": [ 281850.64241636323, 123448.49563496467 ], "end_xy": [ 281949.58073852846, 123436.54930115478 ] } }, "window_minima": { "min_5m": { "gradient_pct": -3.802363576991752, "start_distance_m": 335.0, "end_distance_m": 340.0, "midpoint_distance_m": 337.5, "start_elevation_m": 156.6828480991395, "end_elevation_m": 156.49272992028992, "start_xy": [ 281685.38917213306, 123411.58497752309 ], "end_xy": [ 281689.3855430944, 123414.58981015389 ] }, "min_10m": { "gradient_pct": -2.340234151023708, "start_distance_m": 329.0, "end_distance_m": 339.0, "midpoint_distance_m": 334.0, "start_elevation_m": 156.76264193705813, "end_elevation_m": 156.52861852195576, "start_xy": [ 281680.59352697944, 123407.97917836612 ], "end_xy": [ 281688.5862689021, 123413.98884362774 ] }, "min_20m": { "gradient_pct": -0.5206904702804138, "start_distance_m": 76.0, "end_distance_m": 96.0, "midpoint_distance_m": 86.0, "start_elevation_m": 148.6546792514862, "end_elevation_m": 148.5505411574301, "start_xy": [ 281445.37191231176, 123331.32790982485 ], "end_xy": [ 281460.5949385745, 123344.29939668662 ] }, "min_25m": { "gradient_pct": -0.3261195002061186, "start_distance_m": 71.0, "end_distance_m": 96.0, "midpoint_distance_m": 83.5, "start_elevation_m": 148.63207103248163, "end_elevation_m": 148.5505411574301, "start_xy": [ 281441.56615574606, 123328.08503810939 ], "end_xy": [ 281460.5949385745, 123344.29939668662 ] }, "min_50m": { "gradient_pct": 0.3763687457837932, "start_distance_m": 53.0, "end_distance_m": 103.0, "midpoint_distance_m": 78.0, "start_elevation_m": 148.42904891296513, "end_elevation_m": 148.61723328585703, "start_xy": [ 281427.9225327768, 123316.34827974933 ], "end_xy": [ 281466.0318435939, 123348.6774621622 ] }, "min_100m": { "gradient_pct": 1.1472070436254285, "start_distance_m": 29.0, "end_distance_m": 129.0, "midpoint_distance_m": 79.0, "start_elevation_m": 147.89202911919324, "end_elevation_m": 149.03923616281867, "start_xy": [ 281410.7956616019, 123299.53547857427 ], "end_xy": [ 281489.12049002683, 123360.63214350035 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 40.86532520161086, "start_distance_m": 521.0, "end_distance_m": 523.0, "midpoint_distance_m": 522.0, "start_elevation_m": 174.92105567577624, "end_elevation_m": 175.73836217980846, "start_xy": [ 281861.56838487467, 123448.54153850072 ], "end_xy": [ 281863.5646426202, 123448.4192478084 ] }, "max_3m": { "gradient_pct": 36.214963218902575, "start_distance_m": 521.0, "end_distance_m": 524.0, "midpoint_distance_m": 522.5, "start_elevation_m": 174.92105567577624, "end_elevation_m": 176.00750457234332, "start_xy": [ 281861.56838487467, 123448.54153850072 ], "end_xy": [ 281864.5627714929, 123448.35810246224 ] } }, "diagnostic_note": "Windows <=3 m are at raster-noise scale (1-sigma raster noise alone is roughly +/-7 pp at 2 m and +/-5 pp at 3 m on a 1 m DTM). Diagnostic use only: never a headline or ranking value.", "quality_summary": { "structure_suppression": { "masked_fraction": 0.036, "windows_resited": [], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.015, "obstruction_max_height_m": 4.8, "flagged_windows_m": [] }, "excluded_ranges_m": [ [ 0.0, 20.0 ], [ 470.0, 475.0 ] ], "review": [], "extent": [ "may_continue_beyond_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/england/bulk_dtm_1m/SS8020.tif" ], "calculated_at": "2026-09-05T01:25:39+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "/mnt/HC_Volume_106792346/hunt-gb/regions/region-04.osm.pbf", "osm_snapshot": "", "run_id": "hunt-england-260905", "elevation_provider": "Environment Agency", "elevation_dataset": "EA LIDAR Composite DTM 1m (2022)", "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency", "elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m", "elevation_tile_ids": [ "SS8020.tif" ], "climb_origin": "discovered", "license": "ODbL-1.0", "license_url": "https://howsteep.org/licensing" }, "area": { "place": "Pidland Bottom", "county": "Devon" } }