{
 "ocl_version": "0.1.0",
 "name": "Rowhorne Road",
 "slug": "rowhorne-road-3",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.48587456142232,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 397.0,
   "end_distance_m": 399.0,
   "start_elevation_m": 108.48971362004035,
   "end_elevation_m": 109.3394311112688,
   "min_gradient_pct": -29.5770102964255
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 42.53978374119214,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 395.0,
   "end_distance_m": 398.0,
   "start_elevation_m": 107.71293779203091,
   "end_elevation_m": 108.98913130426668,
   "min_gradient_pct": -26.300785122505015
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 40.733461399685496,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 394.0,
   "end_distance_m": 399.0,
   "start_elevation_m": 107.30275804128452,
   "end_elevation_m": 109.3394311112688,
   "min_gradient_pct": -20.677818619195705
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.16004507435315,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 390.0,
   "end_distance_m": 400.0,
   "start_elevation_m": 106.87726181018888,
   "end_elevation_m": 109.5932663176242,
   "min_gradient_pct": -12.367377705726312
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.000513295951137,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 379.0,
   "end_distance_m": 399.0,
   "start_elevation_m": 104.73932845207857,
   "end_elevation_m": 109.3394311112688,
   "min_gradient_pct": -8.27645699292546
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.066342747895707,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 384.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 105.5826448419077,
   "end_elevation_m": 111.09923052888162,
   "min_gradient_pct": -7.993772778727589
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.715984998033605,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 359.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 102.24123802986482,
   "end_elevation_m": 111.09923052888162,
   "min_gradient_pct": -6.489073181735762
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.223549667346319,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 309.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 96.8756808615353,
   "end_elevation_m": 111.09923052888162,
   "min_gradient_pct": -4.376113852426101
  }
 ],
 "shape": {
  "ascent_concentration": 0.417,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 65.0,
  "shape_class": "sustained"
 },
 "length_m": 3797.99999999998,
 "start_elevation_m": 84.91146694714531,
 "end_elevation_m": 240.8639586847687,
 "endpoint_gain_m": 155.9524917376234,
 "overall_gradient_pct": 4.10617408471891,
 "accumulated_ascent_m": 180.40297608984793,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 40.733461399685496,
   "start_distance_m": 394.0,
   "end_distance_m": 399.0,
   "midpoint_distance_m": 396.5,
   "start_elevation_m": 107.30275804128452,
   "end_elevation_m": 109.3394311112688,
   "start_xy": [
    289059.7963263385,
    93729.48181321523
   ],
   "end_xy": [
    289056.06552103045,
    93732.81063940178
   ]
  },
  "max_10m": {
   "gradient_pct": 27.16004507435315,
   "start_distance_m": 390.0,
   "end_distance_m": 400.0,
   "midpoint_distance_m": 395.0,
   "start_elevation_m": 106.87726181018888,
   "end_elevation_m": 109.5932663176242,
   "start_xy": [
    289062.7807155128,
    93726.81846577539
   ],
   "end_xy": [
    289055.319547885,
    93733.47661542708
   ]
  },
  "max_20m": {
   "gradient_pct": 23.000513295951137,
   "start_distance_m": 379.0,
   "end_distance_m": 399.0,
   "midpoint_distance_m": 389.0,
   "start_elevation_m": 104.73932845207857,
   "end_elevation_m": 109.3394311112688,
   "start_xy": [
    289070.9882996449,
    93719.49483704627
   ],
   "end_xy": [
    289056.06552103045,
    93732.81063940178
   ]
  },
  "max_25m": {
   "gradient_pct": 22.066342747895707,
   "start_distance_m": 384.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 396.5,
   "start_elevation_m": 105.5826448419077,
   "end_elevation_m": 111.09923052888162,
   "start_xy": [
    289067.2574943368,
    93722.82366323279
   ],
   "end_xy": [
    289048.6043530321,
    93739.46878938422
   ]
  },
  "max_50m": {
   "gradient_pct": 17.715984998033605,
   "start_distance_m": 359.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 384.0,
   "start_elevation_m": 102.24123802986482,
   "end_elevation_m": 111.09923052888162,
   "start_xy": [
    289084.8080042441,
    93705.10090535706
   ],
   "end_xy": [
    289048.6043530321,
    93739.46878938422
   ]
  },
  "max_100m": {
   "gradient_pct": 14.223549667346319,
   "start_distance_m": 309.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 359.0,
   "start_elevation_m": 96.8756808615353,
   "end_elevation_m": 111.09923052888162,
   "start_xy": [
    289117.04418301757,
    93666.89393948403
   ],
   "end_xy": [
    289048.6043530321,
    93739.46878938422
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -20.677818619195705,
   "start_distance_m": 1153.0,
   "end_distance_m": 1158.0,
   "midpoint_distance_m": 1155.5,
   "start_elevation_m": 158.0224848243195,
   "end_elevation_m": 156.9885938933597,
   "start_xy": [
    288511.4378032775,
    94189.24096176408
   ],
   "end_xy": [
    288511.0628094363,
    94194.22687989383
   ]
  },
  "min_10m": {
   "gradient_pct": -12.367377705726312,
   "start_distance_m": 1153.0,
   "end_distance_m": 1163.0,
   "midpoint_distance_m": 1158.0,
   "start_elevation_m": 158.0224848243195,
   "end_elevation_m": 156.78574705374686,
   "start_xy": [
    288511.4378032775,
    94189.24096176408
   ],
   "end_xy": [
    288510.687815595,
    94199.21279802358
   ]
  },
  "min_20m": {
   "gradient_pct": -8.27645699292546,
   "start_distance_m": 1300.0,
   "end_distance_m": 1320.0,
   "midpoint_distance_m": 1310.0,
   "start_elevation_m": 155.63877182392773,
   "end_elevation_m": 153.98348042534263,
   "start_xy": [
    288504.8941214132,
    94336.04082335411
   ],
   "end_xy": [
    288504.7331266009,
    94356.0401748854
   ]
  },
  "min_25m": {
   "gradient_pct": -7.993772778727589,
   "start_distance_m": 1297.0,
   "end_distance_m": 1322.0,
   "midpoint_distance_m": 1309.5,
   "start_elevation_m": 155.8422034508872,
   "end_elevation_m": 153.84376025620531,
   "start_xy": [
    288504.9181206452,
    94333.0409193495
   ],
   "end_xy": [
    288504.7171191134,
    94358.04011082446
   ]
  },
  "min_50m": {
   "gradient_pct": -6.489073181735762,
   "start_distance_m": 1280.0,
   "end_distance_m": 1330.0,
   "midpoint_distance_m": 1305.0,
   "start_elevation_m": 156.65376197089495,
   "end_elevation_m": 153.40922538002707,
   "start_xy": [
    288505.11137316533,
    94316.04234199358
   ],
   "end_xy": [
    288504.6531211613,
    94366.03985483674
   ]
  },
  "min_100m": {
   "gradient_pct": -4.376113852426101,
   "start_distance_m": 1269.0,
   "end_distance_m": 1369.0,
   "midpoint_distance_m": 1319.0,
   "start_elevation_m": 156.93917167142922,
   "end_elevation_m": 152.56305781900312,
   "start_xy": [
    288505.378369987,
    94305.04558387336
   ],
   "end_xy": [
    288495.73627572024,
    94403.86572174724
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.48587456142232,
   "start_distance_m": 397.0,
   "end_distance_m": 399.0,
   "midpoint_distance_m": 398.0,
   "start_elevation_m": 108.48971362004035,
   "end_elevation_m": 109.3394311112688,
   "start_xy": [
    289057.55837341107,
    93731.47970372376
   ],
   "end_xy": [
    289056.06552103045,
    93732.81063940178
   ]
  },
  "max_3m": {
   "gradient_pct": 42.53978374119214,
   "start_distance_m": 395.0,
   "end_distance_m": 398.0,
   "midpoint_distance_m": 396.5,
   "start_elevation_m": 107.71293779203091,
   "end_elevation_m": 108.98913130426668,
   "start_xy": [
    289059.050353193,
    93730.14778924052
   ],
   "end_xy": [
    289056.81149417587,
    93732.14466337647
   ]
  }
 },
 "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": 0.018,
   "obstruction_max_height_m": 6.46,
   "flagged_windows_m": []
  },
  "review": [
   "short_window_divergence"
  ],
  "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/SX8590.tif",
   "data/cache/england/bulk_dtm_1m/SX8595.tif"
  ],
  "calculated_at": "2026-08-19T18:45:44+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": [
   "SX8590.tif",
   "SX8595.tif"
  ],
  "route_summit_trim_m": 213.7,
  "route_summit_trim_loss_m": 10.4,
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 8.2% over 200 m (Terrain 50), gain 46.5 m over 1531 m way. EXTENDED by graph walk: +5 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 3 overlapping proposal(s): discovered-lane-50-7359-3-5785, rowhorne-road, rowhorne-road-2 ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Nadderwater",
  "county": "Devon"
 }
}