{
 "ocl_version": "0.1.0",
 "name": "Lower Lye to Upper Lye",
 "slug": "discovered-lane-52-2934-2-8786",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 36.646480414245275,
   "diagnostic": true,
   "flags": [
    "placement_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1732.0,
   "end_distance_m": 1734.0,
   "start_elevation_m": 182.87577974173354,
   "end_elevation_m": 183.60870935001844,
   "min_gradient_pct": -37.8701146266863,
   "suppressed_max_gradient_pct": 41.477113227907125,
   "suppressed_location_m": [
    1660.0,
    1662.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.667741891142065,
   "diagnostic": true,
   "flags": [
    "placement_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1732.0,
   "end_distance_m": 1735.0,
   "start_elevation_m": 182.87577974173354,
   "end_elevation_m": 183.8558119984678,
   "min_gradient_pct": -32.075846360809614,
   "suppressed_max_gradient_pct": 36.27063865431902,
   "suppressed_location_m": [
    1660.0,
    1663.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.063490682274733,
   "diagnostic": false,
   "flags": [
    "placement_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1730.0,
   "end_distance_m": 1735.0,
   "start_elevation_m": 182.55263746435406,
   "end_elevation_m": 183.8558119984678,
   "min_gradient_pct": -22.802178617217805,
   "suppressed_max_gradient_pct": 31.6344665542357,
   "suppressed_location_m": [
    1653.0,
    1658.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 19.621123709517292,
   "diagnostic": false,
   "flags": [
    "placement_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 540.0,
   "end_distance_m": 550.0,
   "start_elevation_m": 149.06045884295946,
   "end_elevation_m": 151.0225712139112,
   "min_gradient_pct": -15.887326481790183,
   "suppressed_max_gradient_pct": 30.844068539954606,
   "suppressed_location_m": [
    1653.0,
    1663.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 18.05490986409538,
   "diagnostic": false,
   "flags": [
    "placement_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1584.0,
   "end_distance_m": 1604.0,
   "start_elevation_m": 163.6943018801305,
   "end_elevation_m": 167.30528385294957,
   "min_gradient_pct": -13.581116255440122,
   "suppressed_max_gradient_pct": 27.20470936973399,
   "suppressed_location_m": [
    1643.0,
    1663.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 17.408341464413866,
   "diagnostic": false,
   "flags": [
    "placement_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1579.0,
   "end_distance_m": 1604.0,
   "start_elevation_m": 162.9531984868461,
   "end_elevation_m": 167.30528385294957,
   "min_gradient_pct": -13.142600772028459,
   "suppressed_max_gradient_pct": 24.458115395896925,
   "suppressed_location_m": [
    1640.0,
    1665.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 15.414380680860544,
   "diagnostic": false,
   "flags": [
    "placement_excluded"
   ],
   "start_distance_m": 1180.0,
   "end_distance_m": 1230.0,
   "start_elevation_m": 127.91114289924137,
   "end_elevation_m": 135.61833323967164,
   "min_gradient_pct": -11.895945696838623,
   "suppressed_max_gradient_pct": 19.008429138763404,
   "suppressed_location_m": [
    1625.0,
    1675.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.4130462579096,
   "diagnostic": false,
   "flags": [
    "placement_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1549.0,
   "end_distance_m": 1649.0,
   "start_elevation_m": 159.45099039358846,
   "end_elevation_m": 172.86403665149805,
   "min_gradient_pct": -11.358527296642933,
   "suppressed_max_gradient_pct": 16.371336503627504,
   "suppressed_location_m": [
    1574.0,
    1674.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.425,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 86.0,
  "shape_class": "sustained"
 },
 "length_m": 1958.9999999999907,
 "start_elevation_m": 115.41625022888184,
 "end_elevation_m": 194.72756111214773,
 "endpoint_gain_m": 79.31131088326589,
 "overall_gradient_pct": 4.048561045598074,
 "accumulated_ascent_m": 119.78889882220888,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.063490682274733,
   "start_distance_m": 1730.0,
   "end_distance_m": 1735.0,
   "midpoint_distance_m": 1732.5,
   "start_elevation_m": 182.55263746435406,
   "end_elevation_m": 183.8558119984678,
   "start_xy": [
    339800.38380748103,
    266157.61343889305
   ],
   "end_xy": [
    339797.62128905195,
    266153.44588662236
   ]
  },
  "max_10m": {
   "gradient_pct": 19.621123709517292,
   "start_distance_m": 540.0,
   "end_distance_m": 550.0,
   "midpoint_distance_m": 545.0,
   "start_elevation_m": 149.06045884295946,
   "end_elevation_m": 151.0225712139112,
   "start_xy": [
    340645.0049104577,
    266936.6859160899
   ],
   "end_xy": [
    340635.88693509495,
    266932.5795155633
   ]
  },
  "max_20m": {
   "gradient_pct": 18.05490986409538,
   "start_distance_m": 1584.0,
   "end_distance_m": 1604.0,
   "midpoint_distance_m": 1594.0,
   "start_elevation_m": 163.6943018801305,
   "end_elevation_m": 167.30528385294957,
   "start_xy": [
    339895.15178724617,
    266265.2805008068
   ],
   "end_xy": [
    339878.5423986483,
    266254.13921675674
   ]
  },
  "max_25m": {
   "gradient_pct": 17.408341464413866,
   "start_distance_m": 1579.0,
   "end_distance_m": 1604.0,
   "midpoint_distance_m": 1591.5,
   "start_elevation_m": 162.9531984868461,
   "end_elevation_m": 167.30528385294957,
   "start_xy": [
    339899.30412513774,
    266268.06583562226
   ],
   "end_xy": [
    339878.5423986483,
    266254.13921675674
   ]
  },
  "max_50m": {
   "gradient_pct": 15.414380680860544,
   "start_distance_m": 1180.0,
   "end_distance_m": 1230.0,
   "midpoint_distance_m": 1205.0,
   "start_elevation_m": 127.91114289924137,
   "end_elevation_m": 135.61833323967164,
   "start_xy": [
    340192.54331047065,
    266521.08180972043
   ],
   "end_xy": [
    340162.4199686639,
    266481.1746138982
   ]
  },
  "max_100m": {
   "gradient_pct": 13.4130462579096,
   "start_distance_m": 1549.0,
   "end_distance_m": 1649.0,
   "midpoint_distance_m": 1599.0,
   "start_elevation_m": 159.45099039358846,
   "end_elevation_m": 172.86403665149805,
   "start_xy": [
    339924.2181524871,
    266284.7778445151
   ],
   "end_xy": [
    339845.13638199697,
    266225.1279295451
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -22.802178617217805,
   "start_distance_m": 646.0,
   "end_distance_m": 651.0,
   "midpoint_distance_m": 648.5,
   "start_elevation_m": 151.19978805654148,
   "end_elevation_m": 150.0596791256806,
   "start_xy": [
    340593.71451856516,
    266853.8160131532
   ],
   "end_xy": [
    340590.9097478021,
    266849.6767788077
   ]
  },
  "min_10m": {
   "gradient_pct": -15.887326481790183,
   "start_distance_m": 646.0,
   "end_distance_m": 656.0,
   "midpoint_distance_m": 651.0,
   "start_elevation_m": 151.19978805654148,
   "end_elevation_m": 149.61105540836246,
   "start_xy": [
    340593.71451856516,
    266853.8160131532
   ],
   "end_xy": [
    340588.1049770391,
    266845.53754446225
   ]
  },
  "min_20m": {
   "gradient_pct": -13.581116255440122,
   "start_distance_m": 880.0,
   "end_distance_m": 900.0,
   "midpoint_distance_m": 890.0,
   "start_elevation_m": 141.34422832842338,
   "end_elevation_m": 138.62800507733536,
   "start_xy": [
    340410.87178657774,
    266719.90571106016
   ],
   "end_xy": [
    340393.51805883186,
    266709.96347120573
   ]
  },
  "min_25m": {
   "gradient_pct": -13.142600772028459,
   "start_distance_m": 876.0,
   "end_distance_m": 901.0,
   "midpoint_distance_m": 888.5,
   "start_elevation_m": 141.80674943042476,
   "end_elevation_m": 138.52109923741764,
   "start_xy": [
    340414.3425321269,
    266721.89415903104
   ],
   "end_xy": [
    340392.6503724446,
    266709.46635921305
   ]
  },
  "min_50m": {
   "gradient_pct": -11.895945696838623,
   "start_distance_m": 883.0,
   "end_distance_m": 933.0,
   "midpoint_distance_m": 908.0,
   "start_elevation_m": 141.01584453623298,
   "end_elevation_m": 135.06787168781366,
   "start_xy": [
    340408.2687274158,
    266718.414375082
   ],
   "end_xy": [
    340364.8844080512,
    266693.55877544597
   ]
  },
  "min_100m": {
   "gradient_pct": -11.358527296642933,
   "start_distance_m": 876.0,
   "end_distance_m": 976.0,
   "midpoint_distance_m": 926.0,
   "start_elevation_m": 141.80674943042476,
   "end_elevation_m": 130.44822213378183,
   "start_xy": [
    340414.3425321269,
    266721.89415903104
   ],
   "end_xy": [
    340327.7165844929,
    266671.9732675943
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 36.646480414245275,
   "start_distance_m": 1732.0,
   "end_distance_m": 1734.0,
   "midpoint_distance_m": 1733.0,
   "start_elevation_m": 182.87577974173354,
   "end_elevation_m": 183.60870935001844,
   "start_xy": [
    339799.2788001094,
    266155.9464179848
   ],
   "end_xy": [
    339798.17379273777,
    266154.2793970765
   ]
  },
  "max_3m": {
   "gradient_pct": 32.667741891142065,
   "start_distance_m": 1732.0,
   "end_distance_m": 1735.0,
   "midpoint_distance_m": 1733.5,
   "start_elevation_m": 182.87577974173354,
   "end_elevation_m": 183.8558119984678,
   "start_xy": [
    339799.2788001094,
    266155.9464179848
   ],
   "end_xy": [
    339797.62128905195,
    266153.44588662236
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.028,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "placement_suppression": {
   "masked_fraction": 0.044,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.053,
   "obstruction_max_height_m": 14.49,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    1082.0,
    1136.0
   ],
   [
    1650.0,
    1680.0
   ]
  ],
  "review": [],
  "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/SO3565.tif",
   "data/cache/england/bulk_dtm_1m/SO4065.tif"
  ],
  "calculated_at": "2026-08-31T05:49:54+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",
  "run_id": "placement-mask-260831",
  "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": [
   "SO3565.tif",
   "SO4065.tif"
  ],
  "route_summit_trim_m": 275.1,
  "route_summit_trim_loss_m": 18.9,
  "climb_origin": "discovered",
  "mask_ranges_m": [
   [
    1087.0,
    1131.0
   ]
  ],
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (52.2934, -2.8786)'",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Lower Lye",
  "county": "County of Herefordshire"
 }
}