{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (54.5635, -2.8773)",
 "slug": "discovered-lane-54-5635-2-8773",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.81722441301207,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 51.0,
   "end_distance_m": 53.0,
   "start_elevation_m": 193.13358400043705,
   "end_elevation_m": 193.8099284886973,
   "min_gradient_pct": -5.517564095798377
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.50035130011857,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 82.0,
   "end_distance_m": 85.0,
   "start_elevation_m": 198.94004945255418,
   "end_elevation_m": 199.76505999155773,
   "min_gradient_pct": -5.632006404809431
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.600057737440125,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 48.0,
   "end_distance_m": 53.0,
   "start_elevation_m": 192.4299256018253,
   "end_elevation_m": 193.8099284886973,
   "min_gradient_pct": -3.0046892268649117
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.02441266597839,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 70.0,
   "start_elevation_m": 194.5600770645633,
   "end_elevation_m": 196.86251833116114,
   "min_gradient_pct": 1.3374074923123658
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.057256629235326,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 80.0,
   "start_elevation_m": 194.5600770645633,
   "end_elevation_m": 198.77152839041037,
   "min_gradient_pct": 4.040870235035783
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.81993170797773,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 85.0,
   "start_elevation_m": 194.5600770645633,
   "end_elevation_m": 199.76505999155773,
   "min_gradient_pct": 4.455546351864314
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.580380736415464,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 36.0,
   "end_distance_m": 86.0,
   "start_elevation_m": 190.15876706920287,
   "end_elevation_m": 199.9489574374106,
   "min_gradient_pct": 5.063691718018106
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.907431727544548,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 16.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 186.4568499431595,
   "end_elevation_m": 204.36428167070406,
   "min_gradient_pct": 7.621900989858688
  }
 ],
 "shape": {
  "ascent_concentration": 0.377,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 130.0,
  "shape_class": "sustained"
 },
 "length_m": 308.7350411698163,
 "start_elevation_m": 185.3805848095708,
 "end_elevation_m": 223.53462979980583,
 "endpoint_gain_m": 38.154044990235036,
 "overall_gradient_pct": 12.358184171666093,
 "accumulated_ascent_m": 38.41354205131725,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.600057737440125,
   "start_distance_m": 48.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 50.5,
   "start_elevation_m": 192.4299256018253,
   "end_elevation_m": 193.8099284886973,
   "start_xy": [
    343338.4891302184,
    519047.518418622
   ],
   "end_xy": [
    343342.1183186491,
    519050.9577486926
   ]
  },
  "max_10m": {
   "gradient_pct": 23.02441266597839,
   "start_distance_m": 60.0,
   "end_distance_m": 70.0,
   "midpoint_distance_m": 65.0,
   "start_elevation_m": 194.5600770645633,
   "end_elevation_m": 196.86251833116114,
   "start_xy": [
    343348.92219591903,
    519052.5322150202
   ],
   "end_xy": [
    343358.8446629643,
    519053.3394300478
   ]
  },
  "max_20m": {
   "gradient_pct": 21.057256629235326,
   "start_distance_m": 60.0,
   "end_distance_m": 80.0,
   "midpoint_distance_m": 70.0,
   "start_elevation_m": 194.5600770645633,
   "end_elevation_m": 198.77152839041037,
   "start_xy": [
    343348.92219591903,
    519052.5322150202
   ],
   "end_xy": [
    343368.8421184475,
    519053.5103359104
   ]
  },
  "max_25m": {
   "gradient_pct": 20.81993170797773,
   "start_distance_m": 60.0,
   "end_distance_m": 85.0,
   "midpoint_distance_m": 72.5,
   "start_elevation_m": 194.5600770645633,
   "end_elevation_m": 199.76505999155773,
   "start_xy": [
    343348.92219591903,
    519052.5322150202
   ],
   "end_xy": [
    343373.69804005424,
    519054.70198407513
   ]
  },
  "max_50m": {
   "gradient_pct": 19.580380736415464,
   "start_distance_m": 36.0,
   "end_distance_m": 86.0,
   "midpoint_distance_m": 61.0,
   "start_elevation_m": 190.15876706920287,
   "end_elevation_m": 199.9489574374106,
   "start_xy": [
    343329.7790779847,
    519039.2640264526
   ],
   "end_xy": [
    343374.6692243756,
    519054.9403137081
   ]
  },
  "max_100m": {
   "gradient_pct": 17.907431727544548,
   "start_distance_m": 16.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 66.0,
   "start_elevation_m": 186.4568499431595,
   "end_elevation_m": 204.36428167070406,
   "start_xy": [
    343314.2634919442,
    519026.6682036162
   ],
   "end_xy": [
    343400.54817492055,
    519069.58124323207
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.0046892268649117,
   "start_distance_m": 147.0,
   "end_distance_m": 152.0,
   "midpoint_distance_m": 149.5,
   "start_elevation_m": 208.08977089427992,
   "end_elevation_m": 207.93953643293668,
   "start_xy": [
    343428.8397253346,
    519081.5672530078
   ],
   "end_xy": [
    343432.5998816659,
    519084.862890179
   ]
  },
  "min_10m": {
   "gradient_pct": 1.3374074923123658,
   "start_distance_m": 147.0,
   "end_distance_m": 157.0,
   "midpoint_distance_m": 152.0,
   "start_elevation_m": 208.08977089427992,
   "end_elevation_m": 208.22351164351116,
   "start_xy": [
    343428.8397253346,
    519081.5672530078
   ],
   "end_xy": [
    343436.1872183382,
    519088.315144186
   ]
  },
  "min_20m": {
   "gradient_pct": 4.040870235035783,
   "start_distance_m": 147.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 157.0,
   "start_elevation_m": 208.08977089427992,
   "end_elevation_m": 208.89794494128708,
   "start_xy": [
    343428.8397253346,
    519081.5672530078
   ],
   "end_xy": [
    343442.00871620356,
    519096.44595980336
   ]
  },
  "min_25m": {
   "gradient_pct": 4.455546351864314,
   "start_distance_m": 147.0,
   "end_distance_m": 172.0,
   "midpoint_distance_m": 159.5,
   "start_elevation_m": 208.08977089427992,
   "end_elevation_m": 209.203657482246,
   "start_xy": [
    343428.8397253346,
    519081.5672530078
   ],
   "end_xy": [
    343444.91946513625,
    519100.511367612
   ]
  },
  "min_50m": {
   "gradient_pct": 5.063691718018106,
   "start_distance_m": 147.0,
   "end_distance_m": 197.0,
   "midpoint_distance_m": 172.0,
   "start_elevation_m": 208.08977089427992,
   "end_elevation_m": 210.62161675328898,
   "start_xy": [
    343428.8397253346,
    519081.5672530078
   ],
   "end_xy": [
    343462.1933352673,
    519118.51190737315
   ]
  },
  "min_100m": {
   "gradient_pct": 7.621900989858688,
   "start_distance_m": 127.0,
   "end_distance_m": 227.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 205.7979130487087,
   "end_elevation_m": 213.41981403856738,
   "start_xy": [
    343410.7894166398,
    519073.4999567051
   ],
   "end_xy": [
    343486.7731112761,
    519135.46828913153
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.81722441301207,
   "start_distance_m": 51.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 52.0,
   "start_elevation_m": 193.13358400043705,
   "end_elevation_m": 193.8099284886973,
   "start_xy": [
    343340.6666432768,
    519049.5820166643
   ],
   "end_xy": [
    343342.1183186491,
    519050.9577486926
   ]
  },
  "max_3m": {
   "gradient_pct": 27.50035130011857,
   "start_distance_m": 82.0,
   "end_distance_m": 85.0,
   "midpoint_distance_m": 83.5,
   "start_elevation_m": 198.94004945255418,
   "end_elevation_m": 199.76505999155773,
   "start_xy": [
    343370.7844870902,
    519053.9869951763
   ],
   "end_xy": [
    343373.69804005424,
    519054.70198407513
   ]
  }
 },
 "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": {
  "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/NY4015.tif"
  ],
  "calculated_at": "2026-09-01T14:03:19+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12-roads.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "run_id": "chunk-07-260901",
  "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": [
   "NY4015.tif"
  ],
  "canopy_check": "unavailable \u2014 surface model missing: [Errno 28] No space left on device",
  "trimmed_from": "discovered-lane-54-5635-2-8773",
  "trim_cut_m": [
   [
    308.7,
    340.0
   ]
  ],
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Martindale",
  "county": "Westmorland and Furness"
 }
}