{
 "ocl_version": "0.1.0",
 "name": "Fish-in-the-Well Rock to Signalhouse Point",
 "slug": "discovered-lane-50-2071-3-7194",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.16280816177921,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 182.0,
   "end_distance_m": 184.0,
   "start_elevation_m": 49.259904284094524,
   "end_elevation_m": 49.90316044733011,
   "min_gradient_pct": -2.577636608299372
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.82880194187724,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 397.0,
   "end_distance_m": 400.0,
   "start_elevation_m": 72.81507959765779,
   "end_elevation_m": 73.7099436559141,
   "min_gradient_pct": -1.836567953683262
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.813545925210008,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 396.0,
   "end_distance_m": 401.0,
   "start_elevation_m": 72.6788460851503,
   "end_elevation_m": 73.9195233814108,
   "min_gradient_pct": -0.737167891111028
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.802249399999077,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 16.0,
   "end_distance_m": 26.0,
   "start_elevation_m": 22.71861419265332,
   "end_elevation_m": 24.998839132653227,
   "min_gradient_pct": 3.9810876326899347
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.84115132338805,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 15.0,
   "end_distance_m": 35.0,
   "start_elevation_m": 22.500528142364757,
   "end_elevation_m": 26.868758407042368,
   "min_gradient_pct": 5.03508982969997
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.160235191624324,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 10.0,
   "end_distance_m": 35.0,
   "start_elevation_m": 21.578699609136287,
   "end_elevation_m": 26.868758407042368,
   "min_gradient_pct": 5.530238415199335
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.139771396225342,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 15.0,
   "end_distance_m": 65.0,
   "start_elevation_m": 22.500528142364757,
   "end_elevation_m": 32.07041384047743,
   "min_gradient_pct": 7.8647447023912775
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.00525224035873,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 20.005383153897675,
   "end_elevation_m": 37.010635394256404,
   "min_gradient_pct": 10.03184878077704
  }
 ],
 "shape": {
  "ascent_concentration": 0.317,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 240.0,
  "shape_class": "sustained"
 },
 "length_m": 409.2614518972482,
 "start_elevation_m": 20.005383153897675,
 "end_elevation_m": 74.2963755416871,
 "endpoint_gain_m": 54.29099238778942,
 "overall_gradient_pct": 13.265601276667528,
 "accumulated_ascent_m": 54.38171790442204,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.813545925210008,
   "start_distance_m": 396.0,
   "end_distance_m": 401.0,
   "midpoint_distance_m": 398.5,
   "start_elevation_m": 72.6788460851503,
   "end_elevation_m": 73.9195233814108,
   "start_xy": [
    277316.62185258686,
    35729.07513574611
   ],
   "end_xy": [
    277314.50255377515,
    35733.603774244635
   ]
  },
  "max_10m": {
   "gradient_pct": 22.802249399999077,
   "start_distance_m": 16.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 21.0,
   "start_elevation_m": 22.71861419265332,
   "end_elevation_m": 24.998839132653227,
   "start_xy": [
    277486.67622202926,
    35394.083732033665
   ],
   "end_xy": [
    277480.3003815602,
    35401.78753889822
   ]
  },
  "max_20m": {
   "gradient_pct": 21.84115132338805,
   "start_distance_m": 15.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 22.500528142364757,
   "end_elevation_m": 26.868758407042368,
   "start_xy": [
    277487.31423970935,
    35393.31371031989
   ],
   "end_xy": [
    277474.0201252614,
    35408.198776505946
   ]
  },
  "max_25m": {
   "gradient_pct": 21.160235191624324,
   "start_distance_m": 10.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 22.5,
   "start_elevation_m": 21.578699609136287,
   "end_elevation_m": 26.868758407042368,
   "start_xy": [
    277490.502160015,
    35389.46180662765
   ],
   "end_xy": [
    277474.0201252614,
    35408.198776505946
   ]
  },
  "max_50m": {
   "gradient_pct": 19.139771396225342,
   "start_distance_m": 15.0,
   "end_distance_m": 65.0,
   "midpoint_distance_m": 40.0,
   "start_elevation_m": 22.500528142364757,
   "end_elevation_m": 32.07041384047743,
   "start_xy": [
    277487.31423970935,
    35393.31371031989
   ],
   "end_xy": [
    277455.7132576073,
    35431.79438822934
   ]
  },
  "max_100m": {
   "gradient_pct": 17.00525224035873,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 20.005383153897675,
   "end_elevation_m": 37.010635394256404,
   "start_xy": [
    277496.878,
    35381.758
   ],
   "end_xy": [
    277432.9688884336,
    35458.396786317324
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.737167891111028,
   "start_distance_m": 403.0,
   "end_distance_m": 408.0,
   "midpoint_distance_m": 405.5,
   "start_elevation_m": 74.25641627599784,
   "end_elevation_m": 74.21955788144228,
   "start_xy": [
    277313.65480753774,
    35735.41521740182
   ],
   "end_xy": [
    277311.5346938246,
    35739.94347498803
   ]
  },
  "min_10m": {
   "gradient_pct": 3.9810876326899347,
   "start_distance_m": 287.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 292.0,
   "start_elevation_m": 61.23198171811429,
   "end_elevation_m": 61.630090481383284,
   "start_xy": [
    277363.05861269904,
    35630.46249093475
   ],
   "end_xy": [
    277358.7766748589,
    35639.49935964382
   ]
  },
  "min_20m": {
   "gradient_pct": 5.03508982969997,
   "start_distance_m": 277.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 287.0,
   "start_elevation_m": 60.62307251544329,
   "end_elevation_m": 61.630090481383284,
   "start_xy": [
    277367.3417360713,
    35621.42618491288
   ],
   "end_xy": [
    277358.7766748589,
    35639.49935964382
   ]
  },
  "min_25m": {
   "gradient_pct": 5.530238415199335,
   "start_distance_m": 276.0,
   "end_distance_m": 301.0,
   "midpoint_distance_m": 288.5,
   "start_elevation_m": 60.54108545893821,
   "end_elevation_m": 61.923645062738046,
   "start_xy": [
    277367.7696680662,
    35620.522373991145
   ],
   "end_xy": [
    277357.06381372357,
    35643.114066340924
   ]
  },
  "min_50m": {
   "gradient_pct": 7.8647447023912775,
   "start_distance_m": 269.0,
   "end_distance_m": 319.0,
   "midpoint_distance_m": 294.0,
   "start_elevation_m": 59.86608502223707,
   "end_elevation_m": 63.79845737343271,
   "start_xy": [
    277370.7666591966,
    35614.19639272494
   ],
   "end_xy": [
    277349.35576689465,
    35659.380165250644
   ]
  },
  "min_100m": {
   "gradient_pct": 10.03184878077704,
   "start_distance_m": 203.0,
   "end_distance_m": 303.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 52.021549428649124,
   "end_elevation_m": 62.05339820942616,
   "start_xy": [
    277394.25958089554,
    35552.601731871204
   ],
   "end_xy": [
    277356.2075981541,
    35644.92152165579
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.16280816177921,
   "start_distance_m": 182.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 183.0,
   "start_elevation_m": 49.259904284094524,
   "end_elevation_m": 49.90316044733011,
   "start_xy": [
    277401.1547085834,
    35532.76603129296
   ],
   "end_xy": [
    277400.48557963537,
    35534.65077444826
   ]
  },
  "max_3m": {
   "gradient_pct": 29.82880194187724,
   "start_distance_m": 397.0,
   "end_distance_m": 400.0,
   "midpoint_distance_m": 398.5,
   "start_elevation_m": 72.81507959765779,
   "end_elevation_m": 73.7099436559141,
   "start_xy": [
    277316.1979768182,
    35729.98085608388
   ],
   "end_xy": [
    277314.92680235056,
    35732.69822847352
   ]
  }
 },
 "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": 0.058,
   "obstruction_max_height_m": 4.52,
   "flagged_windows_m": []
  },
  "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/SX7535.tif"
  ],
  "calculated_at": "2026-08-19T18:07:01+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": [
   "SX7535.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.8% over 200 m (Terrain 50), gain 32.6 m over 284 m way. EXTENDED by graph walk: +4 segment(s) at base, +0 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 (50.2071, -3.7194)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.2071, -3.7194)'"
 },
 "area": {
  "place": "Fish-in-the-Well Rock",
  "county": "Devon"
 }
}