{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.1956, -4.0830)",
 "slug": "discovered-lane-51-1956-4-0830",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 43.07286750197079,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 838.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 183.01392481319184,
   "end_elevation_m": 183.87538216323125,
   "min_gradient_pct": -27.376234769120344
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.19339892317449,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 837.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 182.72958019553602,
   "end_elevation_m": 183.87538216323125,
   "min_gradient_pct": -22.773297850641445
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.53718530103015,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 835.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 182.24852289817974,
   "end_elevation_m": 183.87538216323125,
   "min_gradient_pct": -15.468867932062267
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.470684221980264,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 795.0,
   "end_distance_m": 805.0,
   "start_elevation_m": 177.62490372857297,
   "end_elevation_m": 179.871972150771,
   "min_gradient_pct": -10.140598251101949
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.83613585669562,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 132.0,
   "end_distance_m": 152.0,
   "start_elevation_m": 122.3116235182438,
   "end_elevation_m": 126.67885068958293,
   "min_gradient_pct": -8.220534187043995
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.8302852405227,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 131.0,
   "end_distance_m": 156.0,
   "start_elevation_m": 122.1061366071489,
   "end_elevation_m": 127.56370791727957,
   "min_gradient_pct": -6.660390599270386
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.623361182997595,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 125.0,
   "end_distance_m": 175.0,
   "start_elevation_m": 120.8307956987193,
   "end_elevation_m": 131.1424762902181,
   "min_gradient_pct": -6.388291292016788
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.893890985953135,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 111.0,
   "end_distance_m": 211.0,
   "start_elevation_m": 118.32491163561698,
   "end_elevation_m": 137.21880262157012,
   "min_gradient_pct": -6.116407358705686
  }
 ],
 "shape": {
  "ascent_concentration": 0.471,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 412.0,
  "shape_class": "stepped"
 },
 "length_m": 2409.595257914632,
 "start_elevation_m": 107.42019694941044,
 "end_elevation_m": 238.5171503182989,
 "endpoint_gain_m": 131.09695336888845,
 "overall_gradient_pct": 5.440621321704684,
 "accumulated_ascent_m": 151.79429697255955,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.53718530103015,
   "start_distance_m": 835.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 837.5,
   "start_elevation_m": 182.24852289817974,
   "end_elevation_m": 183.87538216323125,
   "start_xy": [
    254434.06050386454,
    145889.12138346344
   ],
   "end_xy": [
    254433.40370099383,
    145884.180847332
   ]
  },
  "max_10m": {
   "gradient_pct": 22.470684221980264,
   "start_distance_m": 795.0,
   "end_distance_m": 805.0,
   "midpoint_distance_m": 800.0,
   "start_elevation_m": 177.62490372857297,
   "end_elevation_m": 179.871972150771,
   "start_xy": [
    254445.2488244518,
    145927.18997576542
   ],
   "end_xy": [
    254441.26388468445,
    145918.01826627096
   ]
  },
  "max_20m": {
   "gradient_pct": 21.83613585669562,
   "start_distance_m": 132.0,
   "end_distance_m": 152.0,
   "midpoint_distance_m": 142.0,
   "start_elevation_m": 122.3116235182438,
   "end_elevation_m": 126.67885068958293,
   "start_xy": [
    254120.42652946984,
    146171.94047156424
   ],
   "end_xy": [
    254136.31026538275,
    146160.47965591957
   ]
  },
  "max_25m": {
   "gradient_pct": 21.8302852405227,
   "start_distance_m": 131.0,
   "end_distance_m": 156.0,
   "midpoint_distance_m": 143.5,
   "start_elevation_m": 122.1061366071489,
   "end_elevation_m": 127.56370791727957,
   "start_xy": [
    254119.5910601754,
    146172.490008695
   ],
   "end_xy": [
    254138.04302577826,
    146156.8811881457
   ]
  },
  "max_50m": {
   "gradient_pct": 20.623361182997595,
   "start_distance_m": 125.0,
   "end_distance_m": 175.0,
   "midpoint_distance_m": 150.0,
   "start_elevation_m": 120.8307956987193,
   "end_elevation_m": 131.1424762902181,
   "start_xy": [
    254114.5782444088,
    146175.7872314794
   ],
   "end_xy": [
    254151.88094792858,
    146144.8294382488
   ]
  },
  "max_100m": {
   "gradient_pct": 18.893890985953135,
   "start_distance_m": 111.0,
   "end_distance_m": 211.0,
   "midpoint_distance_m": 161.0,
   "start_elevation_m": 118.32491163561698,
   "end_elevation_m": 137.21880262157012,
   "start_xy": [
    254102.9333990711,
    146183.54042895013
   ],
   "end_xy": [
    254186.81395435682,
    146137.33506249895
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.468867932062267,
   "start_distance_m": 1131.0,
   "end_distance_m": 1136.0,
   "midpoint_distance_m": 1133.5,
   "start_elevation_m": 195.5403320075882,
   "end_elevation_m": 194.7668886109851,
   "start_xy": [
    254463.9198037088,
    145600.94532650523
   ],
   "end_xy": [
    254464.6244586756,
    145595.99522939732
   ]
  },
  "min_10m": {
   "gradient_pct": -10.140598251101949,
   "start_distance_m": 572.0,
   "end_distance_m": 582.0,
   "midpoint_distance_m": 577.0,
   "start_elevation_m": 176.82065875522338,
   "end_elevation_m": 175.80659893011318,
   "start_xy": [
    254539.89463782674,
    146109.3272108672
   ],
   "end_xy": [
    254549.61614907053,
    146107.07977735752
   ]
  },
  "min_20m": {
   "gradient_pct": -8.220534187043995,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 107.42019694941044,
   "end_elevation_m": 105.77609011200164,
   "start_xy": [
    254024.023,
    146255.473
   ],
   "end_xy": [
    254037.99059524573,
    146241.15848562436
   ]
  },
  "min_25m": {
   "gradient_pct": -6.660390599270386,
   "start_distance_m": 572.0,
   "end_distance_m": 597.0,
   "midpoint_distance_m": 584.5,
   "start_elevation_m": 176.82065875522338,
   "end_elevation_m": 175.15556110540578,
   "start_xy": [
    254539.89463782674,
    146109.3272108672
   ],
   "end_xy": [
    254546.8078234809,
    146093.28105930472
   ]
  },
  "min_50m": {
   "gradient_pct": -6.388291292016788,
   "start_distance_m": 573.0,
   "end_distance_m": 623.0,
   "midpoint_distance_m": 598.0,
   "start_elevation_m": 176.7695023642578,
   "end_elevation_m": 173.5753567182494,
   "start_xy": [
    254540.89321510014,
    146109.2738870541
   ],
   "end_xy": [
    254539.54102812428,
    146068.3172117398
   ]
  },
  "min_100m": {
   "gradient_pct": -6.116407358705686,
   "start_distance_m": 572.0,
   "end_distance_m": 672.0,
   "midpoint_distance_m": 622.0,
   "start_elevation_m": 176.82065875522338,
   "end_elevation_m": 170.7042513965177,
   "start_xy": [
    254539.89463782674,
    146109.3272108672
   ],
   "end_xy": [
    254522.79236780264,
    146022.5295730865
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 43.07286750197079,
   "start_distance_m": 838.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 839.0,
   "start_elevation_m": 183.01392481319184,
   "end_elevation_m": 183.87538216323125,
   "start_xy": [
    254433.59401404305,
    145886.1578741845
   ],
   "end_xy": [
    254433.40370099383,
    145884.180847332
   ]
  },
  "max_3m": {
   "gradient_pct": 38.19339892317449,
   "start_distance_m": 837.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 838.5,
   "start_elevation_m": 182.72958019553602,
   "end_elevation_m": 183.87538216323125,
   "start_xy": [
    254433.7495106502,
    145887.14571061078
   ],
   "end_xy": [
    254433.40370099383,
    145884.180847332
   ]
  }
 },
 "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": 0.008,
   "obstruction_max_height_m": 4.68,
   "flagged_windows_m": []
  },
  "review": [
   "short_window_divergence"
  ],
  "extent": [
   "descends_at_start"
  ]
 },
 "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/SS5040.tif",
   "data/cache/england/bulk_dtm_1m/SS5045.tif"
  ],
  "calculated_at": "2026-09-05T02:11:42+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": [
   "SS5040.tif",
   "SS5045.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Hele",
  "county": "Devon"
 }
}