{
 "ocl_version": "0.1.0",
 "name": "Castlepark Hill to Rezare",
 "slug": "discovered-lane-50-5813-4-3178",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.57718706020381,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1.0,
   "end_distance_m": 3.0,
   "start_elevation_m": 41.71055902355359,
   "end_elevation_m": 42.52210276475767,
   "min_gradient_pct": -11.119726958123266
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.27483824921766,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1.0,
   "end_distance_m": 4.0,
   "start_elevation_m": 41.71055902355359,
   "end_elevation_m": 42.85880417103012,
   "min_gradient_pct": -10.591467944037921
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.050716145378487,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 259.0,
   "end_distance_m": 264.0,
   "start_elevation_m": 78.89202309105195,
   "end_elevation_m": 80.44455889832088,
   "min_gradient_pct": -9.806507644503029
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.818688478291307,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 254.0,
   "end_distance_m": 264.0,
   "start_elevation_m": 77.66269005049175,
   "end_elevation_m": 80.44455889832088,
   "min_gradient_pct": -9.522492475919506
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.368627252536513,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 249.0,
   "end_distance_m": 269.0,
   "start_elevation_m": 76.91958403972801,
   "end_elevation_m": 81.39330949023531,
   "min_gradient_pct": -9.190074940602244
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.13419323683354,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 244.0,
   "end_distance_m": 269.0,
   "start_elevation_m": 76.10976118102693,
   "end_elevation_m": 81.39330949023531,
   "min_gradient_pct": -8.827453684163345
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.163485863197252,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 219.0,
   "end_distance_m": 269.0,
   "start_elevation_m": 72.31156655863668,
   "end_elevation_m": 81.39330949023531,
   "min_gradient_pct": -7.620409201729018
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.06339293972158,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 169.0,
   "end_distance_m": 269.0,
   "start_elevation_m": 65.32991655051373,
   "end_elevation_m": 81.39330949023531,
   "min_gradient_pct": -7.125458641105738
  }
 ],
 "shape": {
  "ascent_concentration": 0.507,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 126.0,
  "shape_class": "stepped"
 },
 "length_m": 1317.1660651850066,
 "start_elevation_m": 41.51480719161932,
 "end_elevation_m": 117.81244980711415,
 "endpoint_gain_m": 76.29764261549482,
 "overall_gradient_pct": 5.792560606606442,
 "accumulated_ascent_m": 88.9866085194785,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.050716145378487,
   "start_distance_m": 259.0,
   "end_distance_m": 264.0,
   "midpoint_distance_m": 261.5,
   "start_elevation_m": 78.89202309105195,
   "end_elevation_m": 80.44455889832088,
   "start_xy": [
    235985.2839801977,
    78485.07749484923
   ],
   "end_xy": [
    235985.03095893626,
    78480.08390151602
   ]
  },
  "max_10m": {
   "gradient_pct": 27.818688478291307,
   "start_distance_m": 254.0,
   "end_distance_m": 264.0,
   "midpoint_distance_m": 259.0,
   "start_elevation_m": 77.66269005049175,
   "end_elevation_m": 80.44455889832088,
   "start_xy": [
    235985.53696855158,
    78490.07108986327
   ],
   "end_xy": [
    235985.03095893626,
    78480.08390151602
   ]
  },
  "max_20m": {
   "gradient_pct": 22.368627252536513,
   "start_distance_m": 249.0,
   "end_distance_m": 269.0,
   "midpoint_distance_m": 259.0,
   "start_elevation_m": 76.91958403972801,
   "end_elevation_m": 81.39330949023531,
   "start_xy": [
    235985.78994789752,
    78495.06468528685
   ],
   "end_xy": [
    235984.77797057535,
    78475.09030655288
   ]
  },
  "max_25m": {
   "gradient_pct": 21.13419323683354,
   "start_distance_m": 244.0,
   "end_distance_m": 269.0,
   "midpoint_distance_m": 256.5,
   "start_elevation_m": 76.10976118102693,
   "end_elevation_m": 81.39330949023531,
   "start_xy": [
    235986.04296914794,
    78500.05827862064
   ],
   "end_xy": [
    235984.77797057535,
    78475.09030655288
   ]
  },
  "max_50m": {
   "gradient_pct": 18.163485863197252,
   "start_distance_m": 219.0,
   "end_distance_m": 269.0,
   "midpoint_distance_m": 244.0,
   "start_elevation_m": 72.31156655863668,
   "end_elevation_m": 81.39330949023531,
   "start_xy": [
    235985.6502910092,
    78524.88733154474
   ],
   "end_xy": [
    235984.77797057535,
    78475.09030655288
   ]
  },
  "max_100m": {
   "gradient_pct": 16.06339293972158,
   "start_distance_m": 169.0,
   "end_distance_m": 269.0,
   "midpoint_distance_m": 219.0,
   "start_elevation_m": 65.32991655051373,
   "end_elevation_m": 81.39330949023531,
   "start_xy": [
    235974.46626371105,
    78573.62045036488
   ],
   "end_xy": [
    235984.77797057535,
    78475.09030655288
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.806507644503029,
   "start_distance_m": 1086.0,
   "end_distance_m": 1091.0,
   "midpoint_distance_m": 1088.5,
   "start_elevation_m": 103.97412440034417,
   "end_elevation_m": 103.48379901811902,
   "start_xy": [
    236066.97998807888,
    77682.44516239471
   ],
   "end_xy": [
    236068.61773571203,
    77677.7209931258
   ]
  },
  "min_10m": {
   "gradient_pct": -9.522492475919506,
   "start_distance_m": 1081.0,
   "end_distance_m": 1091.0,
   "midpoint_distance_m": 1086.0,
   "start_elevation_m": 104.43604826571097,
   "end_elevation_m": 103.48379901811902,
   "start_xy": [
    236065.3426740577,
    77687.16948223101
   ],
   "end_xy": [
    236068.61773571203,
    77677.7209931258
   ]
  },
  "min_20m": {
   "gradient_pct": -9.190074940602244,
   "start_distance_m": 1072.0,
   "end_distance_m": 1092.0,
   "midpoint_distance_m": 1082.0,
   "start_elevation_m": 105.24660165679782,
   "end_elevation_m": 103.40858666867737,
   "start_xy": [
    236062.39501449023,
    77695.67308630105
   ],
   "end_xy": [
    236068.94502096673,
    77676.77606764156
   ]
  },
  "min_25m": {
   "gradient_pct": -8.827453684163345,
   "start_distance_m": 1068.0,
   "end_distance_m": 1093.0,
   "midpoint_distance_m": 1080.5,
   "start_elevation_m": 105.5389012288013,
   "end_elevation_m": 103.33203780776046,
   "start_xy": [
    236061.08498562602,
    77699.45248039342
   ],
   "end_xy": [
    236069.27264367466,
    77675.83125910537
   ]
  },
  "min_50m": {
   "gradient_pct": -7.620409201729018,
   "start_distance_m": 1052.0,
   "end_distance_m": 1102.0,
   "midpoint_distance_m": 1077.0,
   "start_elevation_m": 106.51359897596544,
   "end_elevation_m": 102.70339437510093,
   "start_xy": [
    236055.84500801368,
    77714.57010496051
   ],
   "end_xy": [
    236071.96250448862,
    77667.35195177294
   ]
  },
  "min_100m": {
   "gradient_pct": -7.125458641105738,
   "start_distance_m": 1000.0,
   "end_distance_m": 1100.0,
   "midpoint_distance_m": 1050.0,
   "start_elevation_m": 109.98370955498393,
   "end_elevation_m": 102.8582509138782,
   "start_xy": [
    236046.34416314034,
    77765.25057641543
   ],
   "end_xy": [
    236071.56496156598,
    77669.2172387809
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.57718706020381,
   "start_distance_m": 1.0,
   "end_distance_m": 3.0,
   "midpoint_distance_m": 2.0,
   "start_elevation_m": 41.71055902355359,
   "end_elevation_m": 42.52210276475767,
   "start_xy": [
    235947.00187675614,
    78726.11350549667
   ],
   "end_xy": [
    235946.5189233383,
    78724.17269240289
   ]
  },
  "max_3m": {
   "gradient_pct": 38.27483824921766,
   "start_distance_m": 1.0,
   "end_distance_m": 4.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 41.71055902355359,
   "end_elevation_m": 42.85880417103012,
   "start_xy": [
    235947.00187675614,
    78726.11350549667
   ],
   "end_xy": [
    235946.2770931644,
    78723.20237381244
   ]
  }
 },
 "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": 0.049,
   "obstruction_max_height_m": 10.41,
   "flagged_windows_m": [
    100
   ]
  },
  "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/SX3575.tif"
  ],
  "calculated_at": "2026-08-19T18:14:38+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "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": [
   "SX3575.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.5% over 200 m (Terrain 50), gain 61.3 m over 1102 m way. EXTENDED by graph walk: +0 segment(s) at base, +2 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (England launch slice 2026-08-16): clean-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (50.5813, -4.3178)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.5813, -4.3178)'"
 },
 "area": {
  "place": "Rezare",
  "county": "Cornwall"
 }
}