{ "ocl_version": "0.1.0", "name": "Discovered lane (53.9200, -2.4283)", "slug": "discovered-lane-53-9200-2-4283", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 37.369044761797454, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 868.0, "end_distance_m": 870.0, "start_elevation_m": 338.5816404192967, "end_elevation_m": 339.32902131453267, "min_gradient_pct": -14.087727522598925, "suppressed_max_gradient_pct": 46.59605320005653, "suppressed_location_m": [ 785.0, 787.0 ] }, { "window_m": 3.0, "max_gradient_pct": 36.88420545035456, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 867.0, "end_distance_m": 870.0, "start_elevation_m": 338.22249515102203, "end_elevation_m": 339.32902131453267, "min_gradient_pct": -11.354001788233367, "suppressed_max_gradient_pct": 39.15948684349549, "suppressed_location_m": [ 785.0, 788.0 ] }, { "window_m": 5.0, "max_gradient_pct": 34.095548728979566, "diagnostic": false, "flags": [], "start_distance_m": 867.0, "end_distance_m": 872.0, "start_elevation_m": 338.22249515102203, "end_elevation_m": 339.927272587471, "min_gradient_pct": -3.565052207818553 }, { "window_m": 10.0, "max_gradient_pct": 30.168924735984888, "diagnostic": false, "flags": [], "start_distance_m": 866.0, "end_distance_m": 876.0, "start_elevation_m": 337.95095136536565, "end_elevation_m": 340.96784383896414, "min_gradient_pct": 2.09495766169141 }, { "window_m": 20.0, "max_gradient_pct": 27.8398668720871, "diagnostic": false, "flags": [], "start_distance_m": 865.0, "end_distance_m": 885.0, "start_elevation_m": 337.7579157130996, "end_elevation_m": 343.325889087517, "min_gradient_pct": 4.221724816316339 }, { "window_m": 25.0, "max_gradient_pct": 25.883519242810735, "diagnostic": false, "flags": [], "start_distance_m": 865.0, "end_distance_m": 890.0, "start_elevation_m": 337.7579157130996, "end_elevation_m": 344.22879552380226, "min_gradient_pct": 4.3897713272965575 }, { "window_m": 50.0, "max_gradient_pct": 21.781786763884725, "diagnostic": false, "flags": [], "start_distance_m": 844.0, "end_distance_m": 894.0, "start_elevation_m": 334.1850190895916, "end_elevation_m": 345.07591247153397, "min_gradient_pct": 4.844260728082531 }, { "window_m": 100.0, "max_gradient_pct": 18.616199235799513, "diagnostic": false, "flags": [], "start_distance_m": 836.0, "end_distance_m": 936.0, "start_elevation_m": 332.66935008800635, "end_elevation_m": 351.28554932380587, "min_gradient_pct": 6.770746023667471 } ], "shape": { "ascent_concentration": 0.369, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 128.0, "shape_class": "sustained" }, "length_m": 1056.2747958000618, "start_elevation_m": 248.61576647033553, "end_elevation_m": 371.55598001952984, "endpoint_gain_m": 122.94021354919431, "overall_gradient_pct": 11.639036928460914, "accumulated_ascent_m": 123.56734925169928, "window_maxima": { "max_5m": { "gradient_pct": 34.095548728979566, "start_distance_m": 867.0, "end_distance_m": 872.0, "midpoint_distance_m": 869.5, "start_elevation_m": 338.22249515102203, "end_elevation_m": 339.927272587471, "start_xy": [ 371723.1388915561, 447308.8886921376 ], "end_xy": [ 371718.1389848801, 447308.91924097564 ] }, "max_10m": { "gradient_pct": 30.168924735984888, "start_distance_m": 866.0, "end_distance_m": 876.0, "midpoint_distance_m": 871.0, "start_elevation_m": 337.95095136536565, "end_elevation_m": 340.96784383896414, "start_xy": [ 371724.1388728913, 447308.88258237 ], "end_xy": [ 371714.13905953936, 447308.9436800461 ] }, "max_20m": { "gradient_pct": 27.8398668720871, "start_distance_m": 865.0, "end_distance_m": 885.0, "midpoint_distance_m": 875.0, "start_elevation_m": 337.7579157130996, "end_elevation_m": 343.325889087517, "start_xy": [ 371725.1388542265, 447308.87647260237 ], "end_xy": [ 371705.1392275226, 447308.99866795464 ] }, "max_25m": { "gradient_pct": 25.883519242810735, "start_distance_m": 865.0, "end_distance_m": 890.0, "midpoint_distance_m": 877.5, "start_elevation_m": 337.7579157130996, "end_elevation_m": 344.22879552380226, "start_xy": [ 371725.1388542265, 447308.87647260237 ], "end_xy": [ 371700.13932084665, 447309.02921679267 ] }, "max_50m": { "gradient_pct": 21.781786763884725, "start_distance_m": 844.0, "end_distance_m": 894.0, "midpoint_distance_m": 869.0, "start_elevation_m": 334.1850190895916, "end_elevation_m": 345.07591247153397, "start_xy": [ 371740.60412103886, 447298.23499643884 ], "end_xy": [ 371696.13939550583, 447309.0536558631 ] }, "max_100m": { "gradient_pct": 18.616199235799513, "start_distance_m": 836.0, "end_distance_m": 936.0, "midpoint_distance_m": 886.0, "start_elevation_m": 332.66935008800635, "end_elevation_m": 351.28554932380587, "start_xy": [ 371745.1725411513, 447291.6676881869 ], "end_xy": [ 371658.1426007133, 447325.54880866036 ] } }, "window_minima": { "min_5m": { "gradient_pct": -3.565052207818553, "start_distance_m": 780.0, "end_distance_m": 785.0, "midpoint_distance_m": 782.5, "start_elevation_m": 325.42348442014634, "end_elevation_m": 325.2452318097554, "start_xy": [ 371794.7360994469, 447276.66861846845 ], "end_xy": [ 371790.5675642662, 447279.4296535003 ] }, "min_10m": { "gradient_pct": 2.09495766169141, "start_distance_m": 899.0, "end_distance_m": 909.0, "midpoint_distance_m": 904.0, "start_elevation_m": 345.9614509346184, "end_elevation_m": 346.17094670078757, "start_xy": [ 371691.1853862495, 447309.2955952366 ], "end_xy": [ 371682.06060789403, 447313.3868566512 ] }, "min_20m": { "gradient_pct": 4.221724816316339, "start_distance_m": 413.0, "end_distance_m": 433.0, "midpoint_distance_m": 423.0, "start_elevation_m": 285.11686829983444, "end_elevation_m": 285.9612132630977, "start_xy": [ 371970.5667330095, 447020.0565019854 ], "end_xy": [ 371970.327169118, 447040.0550671625 ] }, "min_25m": { "gradient_pct": 4.3897713272965575, "start_distance_m": 413.0, "end_distance_m": 438.0, "midpoint_distance_m": 425.5, "start_elevation_m": 285.11686829983444, "end_elevation_m": 286.2143111316586, "start_xy": [ 371970.5667330095, 447020.0565019854 ], "end_xy": [ 371970.2672781451, 447045.05470845674 ] }, "min_50m": { "gradient_pct": 4.844260728082531, "start_distance_m": 390.0, "end_distance_m": 440.0, "midpoint_distance_m": 415.0, "start_elevation_m": 283.9081607770841, "end_elevation_m": 286.3302911411254, "start_xy": [ 371970.8422314847, 446997.05815203174 ], "end_xy": [ 371970.24332175596, 447047.05456497445 ] }, "min_100m": { "gradient_pct": 6.770746023667471, "start_distance_m": 362.0, "end_distance_m": 462.0, "midpoint_distance_m": 412.0, "start_elevation_m": 281.38508300234037, "end_elevation_m": 288.15582902600784, "start_xy": [ 371971.17762093287, 446969.0601607838 ], "end_xy": [ 371969.93124923314, 447069.0523327135 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 37.369044761797454, "start_distance_m": 868.0, "end_distance_m": 870.0, "midpoint_distance_m": 869.0, "start_elevation_m": 338.5816404192967, "end_elevation_m": 339.32902131453267, "start_xy": [ 371722.13891022094, 447308.8948019052 ], "end_xy": [ 371720.13894755056, 447308.90702144045 ] }, "max_3m": { "gradient_pct": 36.88420545035456, "start_distance_m": 867.0, "end_distance_m": 870.0, "midpoint_distance_m": 868.5, "start_elevation_m": 338.22249515102203, "end_elevation_m": 339.32902131453267, "start_xy": [ 371723.1388915561, 447308.8886921376 ], "end_xy": [ 371720.13894755056, 447308.90702144045 ] } }, "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": 0.006, "windows_resited": [ 2.0, 3.0 ], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.0, "obstruction_max_height_m": 0.7, "flagged_windows_m": [] }, "excluded_ranges_m": [ [ 784.0, 789.0 ] ], "review": [], "extent": [ "may_start_earlier", "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/SD7045.tif" ], "calculated_at": "2026-09-05T02:27:52+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "/mnt/HC_Volume_106794610/hunt-gb/regions/region-13.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": [ "SD7045.tif" ], "climb_origin": "discovered", "license": "ODbL-1.0", "license_url": "https://howsteep.org/licensing" }, "area": { "place": "Cuttock Clough", "county": "Lancashire" } }