{
 "ocl_version": "0.1.0",
 "name": "Norland Town Road",
 "slug": "norland-town-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.292451197077014,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 227.0,
   "end_distance_m": 229.0,
   "start_elevation_m": 113.49794860836343,
   "end_elevation_m": 113.98379763230497,
   "min_gradient_pct": -94.05498642914907,
   "suppressed_max_gradient_pct": 120.24012675599991,
   "suppressed_location_m": [
    171.0,
    173.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.779448242655594,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 226.0,
   "end_distance_m": 229.0,
   "start_elevation_m": 113.2704141850253,
   "end_elevation_m": 113.98379763230497,
   "min_gradient_pct": -90.92186809708143,
   "suppressed_max_gradient_pct": 116.23930137445437,
   "suppressed_location_m": [
    171.0,
    174.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.322574340007577,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 223.0,
   "end_distance_m": 228.0,
   "start_elevation_m": 112.63684317761076,
   "end_elevation_m": 113.75297189461114,
   "min_gradient_pct": -84.38862276351244,
   "suppressed_max_gradient_pct": 104.86844057724909,
   "suppressed_location_m": [
    169.0,
    174.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.429351516168964,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 223.0,
   "end_distance_m": 233.0,
   "start_elevation_m": 112.63684317761076,
   "end_elevation_m": 114.77977832922765,
   "min_gradient_pct": -75.70915577618337,
   "suppressed_max_gradient_pct": 98.08865997659552,
   "suppressed_location_m": [
    169.0,
    179.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.397485285788974,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 222.0,
   "end_distance_m": 242.0,
   "start_elevation_m": 112.42171152382399,
   "end_elevation_m": 116.50120858098178,
   "min_gradient_pct": -57.251951888361965,
   "suppressed_max_gradient_pct": 91.69181838314628,
   "suppressed_location_m": [
    159.0,
    179.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.01388601199386,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 222.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 112.42171152382399,
   "end_elevation_m": 117.42518302682245,
   "min_gradient_pct": -45.242142006194115,
   "suppressed_max_gradient_pct": 83.1673115691737,
   "suppressed_location_m": [
    155.0,
    180.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.329336044631447,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 222.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 112.42171152382399,
   "end_elevation_m": 122.08637954613971,
   "min_gradient_pct": -12.997280457088236,
   "suppressed_max_gradient_pct": 52.226266285035365,
   "suppressed_location_m": [
    154.0,
    204.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.535724995108623,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 222.0,
   "end_distance_m": 322.0,
   "start_elevation_m": 112.42171152382399,
   "end_elevation_m": 129.9574365189326,
   "min_gradient_pct": 1.6039954778470076,
   "suppressed_max_gradient_pct": 36.15108646101473,
   "suppressed_location_m": [
    154.0,
    254.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.462,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 218.0,
  "shape_class": "stepped"
 },
 "length_m": 1749.8987474060832,
 "start_elevation_m": 75.34856343078555,
 "end_elevation_m": 229.2768116489413,
 "endpoint_gain_m": 153.92824821815577,
 "overall_gradient_pct": 8.796408846301953,
 "accumulated_ascent_m": 166.3711099381135,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.322574340007577,
   "start_distance_m": 223.0,
   "end_distance_m": 228.0,
   "midpoint_distance_m": 225.5,
   "start_elevation_m": 112.63684317761076,
   "end_elevation_m": 113.75297189461114,
   "start_xy": [
    406865.7046997354,
    423455.77724771015
   ],
   "end_xy": [
    406863.68522524164,
    423451.203220735
   ]
  },
  "max_10m": {
   "gradient_pct": 21.429351516168964,
   "start_distance_m": 223.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 228.0,
   "start_elevation_m": 112.63684317761076,
   "end_elevation_m": 114.77977832922765,
   "start_xy": [
    406865.7046997354,
    423455.77724771015
   ],
   "end_xy": [
    406861.6657507479,
    423446.62919375993
   ]
  },
  "max_20m": {
   "gradient_pct": 20.397485285788974,
   "start_distance_m": 222.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 232.0,
   "start_elevation_m": 112.42171152382399,
   "end_elevation_m": 116.50120858098178,
   "start_xy": [
    406866.1085946341,
    423456.69205310516
   ],
   "end_xy": [
    406858.0306966592,
    423438.3959452047
   ]
  },
  "max_25m": {
   "gradient_pct": 20.01388601199386,
   "start_distance_m": 222.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 234.5,
   "start_elevation_m": 112.42171152382399,
   "end_elevation_m": 117.42518302682245,
   "start_xy": [
    406866.1085946341,
    423456.69205310516
   ],
   "end_xy": [
    406856.0112221654,
    423433.8219182296
   ]
  },
  "max_50m": {
   "gradient_pct": 19.329336044631447,
   "start_distance_m": 222.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 247.0,
   "start_elevation_m": 112.42171152382399,
   "end_elevation_m": 122.08637954613971,
   "start_xy": [
    406866.1085946341,
    423456.69205310516
   ],
   "end_xy": [
    406845.91384969675,
    423410.951783354
   ]
  },
  "max_100m": {
   "gradient_pct": 17.535724995108623,
   "start_distance_m": 222.0,
   "end_distance_m": 322.0,
   "midpoint_distance_m": 272.0,
   "start_elevation_m": 112.42171152382399,
   "end_elevation_m": 129.9574365189326,
   "start_xy": [
    406866.1085946341,
    423456.69205310516
   ],
   "end_xy": [
    406832.94419637107,
    423363.04394501477
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -84.38862276351244,
   "start_distance_m": 132.0,
   "end_distance_m": 137.0,
   "midpoint_distance_m": 134.5,
   "start_elevation_m": 93.65187933950574,
   "end_elevation_m": 89.43244820133012,
   "start_xy": [
    406905.2092291898,
    423537.7166681528
   ],
   "end_xy": [
    406902.9357768227,
    423533.2634205362
   ]
  },
  "min_10m": {
   "gradient_pct": -75.70915577618337,
   "start_distance_m": 132.0,
   "end_distance_m": 142.0,
   "midpoint_distance_m": 137.0,
   "start_elevation_m": 93.65187933950574,
   "end_elevation_m": 86.0809637618874,
   "start_xy": [
    406905.2092291898,
    423537.7166681528
   ],
   "end_xy": [
    406900.6623244556,
    423528.8101729196
   ]
  },
  "min_20m": {
   "gradient_pct": -57.251951888361965,
   "start_distance_m": 131.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 141.0,
   "start_elevation_m": 94.00337167208993,
   "end_elevation_m": 82.55298129441753,
   "start_xy": [
    406905.66391966323,
    423538.60731767607
   ],
   "end_xy": [
    406896.57011019485,
    423520.79432720976
   ]
  },
  "min_25m": {
   "gradient_pct": -45.242142006194115,
   "start_distance_m": 129.0,
   "end_distance_m": 154.0,
   "midpoint_distance_m": 141.5,
   "start_elevation_m": 93.8935617268344,
   "end_elevation_m": 82.58302622528588,
   "start_xy": [
    406906.57330061006,
    423540.3886167227
   ],
   "end_xy": [
    406895.2060387746,
    423518.1223786398
   ]
  },
  "min_50m": {
   "gradient_pct": -12.997280457088236,
   "start_distance_m": 104.0,
   "end_distance_m": 154.0,
   "midpoint_distance_m": 129.0,
   "start_elevation_m": 89.08166645383,
   "end_elevation_m": 82.58302622528588,
   "start_xy": [
    406918.271462045,
    423562.47765076027
   ],
   "end_xy": [
    406895.2060387746,
    423518.1223786398
   ]
  },
  "min_100m": {
   "gradient_pct": 1.6039954778470076,
   "start_distance_m": 1649.0,
   "end_distance_m": 1749.0,
   "midpoint_distance_m": 1699.0,
   "start_elevation_m": 227.6854781562972,
   "end_elevation_m": 229.2894736341442,
   "start_xy": [
    406656.6413857419,
    422655.2804403283
   ],
   "end_xy": [
    406573.59354205336,
    422599.57839252154
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.292451197077014,
   "start_distance_m": 227.0,
   "end_distance_m": 229.0,
   "midpoint_distance_m": 228.0,
   "start_elevation_m": 113.49794860836343,
   "end_elevation_m": 113.98379763230497,
   "start_xy": [
    406864.0891201404,
    423452.1180261301
   ],
   "end_xy": [
    406863.28133034287,
    423450.28841534
   ]
  },
  "max_3m": {
   "gradient_pct": 23.779448242655594,
   "start_distance_m": 226.0,
   "end_distance_m": 229.0,
   "midpoint_distance_m": 227.5,
   "start_elevation_m": 113.2704141850253,
   "end_elevation_m": 113.98379763230497,
   "start_xy": [
    406864.49301503913,
    423453.0328315251
   ],
   "end_xy": [
    406863.28133034287,
    423450.28841534
   ]
  }
 },
 "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": 0.065,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.03,
   "obstruction_max_height_m": 16.26,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    108.0,
    221.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "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/SE0520.tif"
  ],
  "calculated_at": "2026-09-05T02:03:10+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-09.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": [
   "SE0520.tif"
  ],
  "climb_origin": "discovered",
  "mask_basin_extension_m": 30.0,
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Norland Town",
  "county": ""
 }
}