{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (54.9526, -1.9962)",
 "slug": "discovered-lane-54-9526-1-9962",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.82001592105175,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 162.0,
   "end_distance_m": 164.0,
   "start_elevation_m": 89.29633377870759,
   "end_elevation_m": 89.95273409712863,
   "min_gradient_pct": -3.3176016102629546
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.288711369072548,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 165.0,
   "start_elevation_m": 89.29633377870759,
   "end_elevation_m": 90.23499511977977,
   "min_gradient_pct": -2.60549909785747
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.854031145233535,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 155.0,
   "end_distance_m": 160.0,
   "start_elevation_m": 87.69942662742527,
   "end_elevation_m": 89.04212818468694,
   "min_gradient_pct": -1.706643368405878
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.355684923545,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 155.0,
   "end_distance_m": 165.0,
   "start_elevation_m": 87.69942662742527,
   "end_elevation_m": 90.23499511977977,
   "min_gradient_pct": -1.4249583535602994
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.17265976897437,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 145.0,
   "end_distance_m": 165.0,
   "start_elevation_m": 85.8004631659849,
   "end_elevation_m": 90.23499511977977,
   "min_gradient_pct": -1.1283870725560519
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.34934529575264,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 140.0,
   "end_distance_m": 165.0,
   "start_elevation_m": 84.89765879584161,
   "end_elevation_m": 90.23499511977977,
   "min_gradient_pct": -0.772534258724761
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.556295250646144,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 120.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 81.73686374851762,
   "end_elevation_m": 91.0150113738407,
   "min_gradient_pct": -0.23553946142001791
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.425427358147559,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 70.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 75.58958401569313,
   "end_elevation_m": 91.0150113738407,
   "min_gradient_pct": 0.5319373411000612
  }
 ],
 "shape": {
  "ascent_concentration": 0.425,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 181.0,
  "shape_class": "sustained"
 },
 "length_m": 608.999999999954,
 "start_elevation_m": 69.13933483680768,
 "end_elevation_m": 124.25093932271335,
 "endpoint_gain_m": 55.11160448590567,
 "overall_gradient_pct": 9.04952454612641,
 "accumulated_ascent_m": 55.80459831005979,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.854031145233535,
   "start_distance_m": 155.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 157.5,
   "start_elevation_m": 87.69942662742527,
   "end_elevation_m": 89.04212818468694,
   "start_xy": [
    400407.4148780737,
    562444.1314197873
   ],
   "end_xy": [
    400406.1028185055,
    562439.3066400317
   ]
  },
  "max_10m": {
   "gradient_pct": 25.355684923545,
   "start_distance_m": 155.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 160.0,
   "start_elevation_m": 87.69942662742527,
   "end_elevation_m": 90.23499511977977,
   "start_xy": [
    400407.4148780737,
    562444.1314197873
   ],
   "end_xy": [
    400404.7907589373,
    562434.4818602762
   ]
  },
  "max_20m": {
   "gradient_pct": 22.17265976897437,
   "start_distance_m": 145.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 155.0,
   "start_elevation_m": 85.8004631659849,
   "end_elevation_m": 90.23499511977977,
   "start_xy": [
    400410.0389972101,
    562453.7809792984
   ],
   "end_xy": [
    400404.7907589373,
    562434.4818602762
   ]
  },
  "max_25m": {
   "gradient_pct": 21.34934529575264,
   "start_distance_m": 140.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 152.5,
   "start_elevation_m": 84.89765879584161,
   "end_elevation_m": 90.23499511977977,
   "start_xy": [
    400411.3510567783,
    562458.605759054
   ],
   "end_xy": [
    400404.7907589373,
    562434.4818602762
   ]
  },
  "max_50m": {
   "gradient_pct": 18.556295250646144,
   "start_distance_m": 120.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 145.0,
   "start_elevation_m": 81.73686374851762,
   "end_elevation_m": 91.0150113738407,
   "start_xy": [
    400419.4257767911,
    562476.7463653152
   ],
   "end_xy": [
    400403.47869936906,
    562429.6570805206
   ]
  },
  "max_100m": {
   "gradient_pct": 15.425427358147559,
   "start_distance_m": 70.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 120.0,
   "start_elevation_m": 75.58958401569313,
   "end_elevation_m": 91.0150113738407,
   "start_xy": [
    400443.94211979484,
    562520.3232964338
   ],
   "end_xy": [
    400403.47869936906,
    562429.6570805206
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.706643368405878,
   "start_distance_m": 558.0,
   "end_distance_m": 563.0,
   "midpoint_distance_m": 560.5,
   "start_elevation_m": 123.75111487500529,
   "end_elevation_m": 123.66578270658499,
   "start_xy": [
    400341.25502757024,
    562054.9160072055
   ],
   "end_xy": [
    400341.4406016161,
    562049.919452165
   ]
  },
  "min_10m": {
   "gradient_pct": -1.4249583535602994,
   "start_distance_m": 545.0,
   "end_distance_m": 555.0,
   "midpoint_distance_m": 550.0,
   "start_elevation_m": 123.89113302577563,
   "end_elevation_m": 123.7486371904196,
   "start_xy": [
    400340.77253505087,
    562067.907050311
   ],
   "end_xy": [
    400341.14368314267,
    562057.9139402299
   ]
  },
  "min_20m": {
   "gradient_pct": -1.1283870725560519,
   "start_distance_m": 543.0,
   "end_distance_m": 563.0,
   "midpoint_distance_m": 553.0,
   "start_elevation_m": 123.8914601210962,
   "end_elevation_m": 123.66578270658499,
   "start_xy": [
    400340.6983054325,
    562069.9056723273
   ],
   "end_xy": [
    400341.4406016161,
    562049.919452165
   ]
  },
  "min_25m": {
   "gradient_pct": -0.772534258724761,
   "start_distance_m": 544.0,
   "end_distance_m": 569.0,
   "midpoint_distance_m": 556.5,
   "start_elevation_m": 123.90016348715362,
   "end_elevation_m": 123.70702992247243,
   "start_xy": [
    400340.7354202417,
    562068.9063613191
   ],
   "end_xy": [
    400341.6632904712,
    562043.9235861163
   ]
  },
  "min_50m": {
   "gradient_pct": -0.23553946142001791,
   "start_distance_m": 513.0,
   "end_distance_m": 563.0,
   "midpoint_distance_m": 538.0,
   "start_elevation_m": 123.783552437295,
   "end_elevation_m": 123.66578270658499,
   "start_xy": [
    400339.5848611571,
    562099.8850025707
   ],
   "end_xy": [
    400341.4406016161,
    562049.919452165
   ]
  },
  "min_100m": {
   "gradient_pct": 0.5319373411000612,
   "start_distance_m": 509.0,
   "end_distance_m": 609.0,
   "midpoint_distance_m": 559.0,
   "start_elevation_m": 123.71900198161329,
   "end_elevation_m": 124.25093932271335,
   "start_xy": [
    400339.4364019204,
    562103.8822466031
   ],
   "end_xy": [
    400340.4622140065,
    562004.0138662998
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.82001592105175,
   "start_distance_m": 162.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 89.29633377870759,
   "end_elevation_m": 89.95273409712863,
   "start_xy": [
    400405.5779946782,
    562437.3767281296
   ],
   "end_xy": [
    400405.0531708509,
    562435.4468162274
   ]
  },
  "max_3m": {
   "gradient_pct": 31.288711369072548,
   "start_distance_m": 162.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 163.5,
   "start_elevation_m": 89.29633377870759,
   "end_elevation_m": 90.23499511977977,
   "start_xy": [
    400405.5779946782,
    562437.3767281296
   ],
   "end_xy": [
    400404.7907589373,
    562434.4818602762
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.057,
   "obstruction_max_height_m": 14.07,
   "flagged_windows_m": [
    2,
    20,
    25
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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/NZ0060.tif"
  ],
  "calculated_at": "2026-09-05T06:07:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-27-roads.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "summit-260905-summit-england-england-2026-08-27",
  "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": [
   "NZ0060.tif"
  ],
  "route_summit_trim_m": 760.1,
  "route_summit_trim_loss_m": 30.1,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Corbridge",
  "county": "Northumberland"
 }
}