{
 "ocl_version": "0.1.0",
 "name": "Craigs Bank",
 "slug": "craigs-bank",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.97579451742246,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 474.0,
   "end_distance_m": 476.0,
   "start_elevation_m": 164.2891536484806,
   "end_elevation_m": 165.06866953882906,
   "min_gradient_pct": -71.24523128789946,
   "suppressed_max_gradient_pct": 93.95767859442543,
   "suppressed_location_m": [
    252.0,
    254.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.31607818083652,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 473.0,
   "end_distance_m": 476.0,
   "start_elevation_m": 164.00918719340396,
   "end_elevation_m": 165.06866953882906,
   "min_gradient_pct": -59.60885867266749,
   "suppressed_max_gradient_pct": 65.0220833035642,
   "suppressed_location_m": [
    251.0,
    254.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 30.147137368137464,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 472.0,
   "end_distance_m": 477.0,
   "start_elevation_m": 163.8037934389512,
   "end_elevation_m": 165.31115030735808,
   "min_gradient_pct": -38.65537564909516,
   "suppressed_max_gradient_pct": 39.60558064560587,
   "suppressed_location_m": [
    250.0,
    255.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.977718525254204,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 466.0,
   "end_distance_m": 476.0,
   "start_elevation_m": 162.37089768630364,
   "end_elevation_m": 165.06866953882906,
   "min_gradient_pct": -19.928366079146542
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.334355789123663,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 465.0,
   "end_distance_m": 485.0,
   "start_elevation_m": 162.12542394968756,
   "end_elevation_m": 166.9922951075123,
   "min_gradient_pct": -14.016699824153278
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.793002641160456,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 460.0,
   "end_distance_m": 485.0,
   "start_elevation_m": 161.04404444722218,
   "end_elevation_m": 166.9922951075123,
   "min_gradient_pct": -13.703965386036316
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.329293485272675,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 435.0,
   "end_distance_m": 485.0,
   "start_elevation_m": 156.32764836487596,
   "end_elevation_m": 166.9922951075123,
   "min_gradient_pct": -11.549284780893288
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.439291900820706,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 422.0,
   "end_distance_m": 522.0,
   "start_elevation_m": 153.8620699525534,
   "end_elevation_m": 173.30136185337412,
   "min_gradient_pct": -4.5322432615150205
  }
 ],
 "shape": {
  "ascent_concentration": 0.561,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 169.0,
  "shape_class": "stepped"
 },
 "length_m": 1022.2207836941352,
 "start_elevation_m": 139.0214697161939,
 "end_elevation_m": 189.66837928314115,
 "endpoint_gain_m": 50.646909566947244,
 "overall_gradient_pct": 4.9545959517588525,
 "accumulated_ascent_m": 67.27346052167277,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 30.147137368137464,
   "start_distance_m": 472.0,
   "end_distance_m": 477.0,
   "midpoint_distance_m": 474.5,
   "start_elevation_m": 163.8037934389512,
   "end_elevation_m": 165.31115030735808,
   "start_xy": [
    366597.0742672132,
    560633.7026031669
   ],
   "end_xy": [
    366595.5138923756,
    560638.4528905652
   ]
  },
  "max_10m": {
   "gradient_pct": 26.977718525254204,
   "start_distance_m": 466.0,
   "end_distance_m": 476.0,
   "midpoint_distance_m": 471.0,
   "start_elevation_m": 162.37089768630364,
   "end_elevation_m": 165.06866953882906,
   "start_xy": [
    366598.9467170183,
    560628.002258289
   ],
   "end_xy": [
    366595.8259673431,
    560637.5028330855
   ]
  },
  "max_20m": {
   "gradient_pct": 24.334355789123663,
   "start_distance_m": 465.0,
   "end_distance_m": 485.0,
   "midpoint_distance_m": 475.0,
   "start_elevation_m": 162.12542394968756,
   "end_elevation_m": 166.9922951075123,
   "start_xy": [
    366599.2368356216,
    560627.0458484165
   ],
   "end_xy": [
    366593.01729263546,
    560646.0533504024
   ]
  },
  "max_25m": {
   "gradient_pct": 23.793002641160456,
   "start_distance_m": 460.0,
   "end_distance_m": 485.0,
   "midpoint_distance_m": 472.5,
   "start_elevation_m": 161.04404444722218,
   "end_elevation_m": 166.9922951075123,
   "start_xy": [
    366600.453894731,
    560622.1962332644
   ],
   "end_xy": [
    366593.01729263546,
    560646.0533504024
   ]
  },
  "max_50m": {
   "gradient_pct": 21.329293485272675,
   "start_distance_m": 435.0,
   "end_distance_m": 485.0,
   "midpoint_distance_m": 460.0,
   "start_elevation_m": 156.32764836487596,
   "end_elevation_m": 166.9922951075123,
   "start_xy": [
    366606.53919027804,
    560597.9481575035
   ],
   "end_xy": [
    366593.01729263546,
    560646.0533504024
   ]
  },
  "max_100m": {
   "gradient_pct": 19.439291900820706,
   "start_distance_m": 422.0,
   "end_distance_m": 522.0,
   "midpoint_distance_m": 472.0,
   "start_elevation_m": 153.8620699525534,
   "end_elevation_m": 173.30136185337412,
   "start_xy": [
    366609.7035439625,
    560585.3391581079
   ],
   "end_xy": [
    366580.6090693808,
    560680.8555787493
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -38.65537564909516,
   "start_distance_m": 237.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 239.5,
   "start_elevation_m": 141.15156801292986,
   "end_elevation_m": 139.2187992304751,
   "start_xy": [
    366739.5937862882,
    560576.7872325918
   ],
   "end_xy": [
    366735.1359531311,
    560574.5227848572
   ]
  },
  "min_10m": {
   "gradient_pct": -19.928366079146542,
   "start_distance_m": 237.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 242.0,
   "start_elevation_m": 141.15156801292986,
   "end_elevation_m": 139.1587314050152,
   "start_xy": [
    366739.5937862882,
    560576.7872325918
   ],
   "end_xy": [
    366730.6781199739,
    560572.2583371225
   ]
  },
  "min_20m": {
   "gradient_pct": -14.016699824153278,
   "start_distance_m": 994.0,
   "end_distance_m": 1014.0,
   "midpoint_distance_m": 1004.0,
   "start_elevation_m": 193.4624709517991,
   "end_elevation_m": 190.65913098696845,
   "start_xy": [
    366559.39656569465,
    561137.8440772321
   ],
   "end_xy": [
    366559.5527869447,
    561157.8434670958
   ]
  },
  "min_25m": {
   "gradient_pct": -13.703965386036316,
   "start_distance_m": 991.0,
   "end_distance_m": 1016.0,
   "midpoint_distance_m": 1003.5,
   "start_elevation_m": 193.85063014034523,
   "end_elevation_m": 190.42463879383615,
   "start_xy": [
    366559.37313250714,
    561134.8441687525
   ],
   "end_xy": [
    366559.56840906973,
    561159.8434060821
   ]
  },
  "min_50m": {
   "gradient_pct": -11.549284780893288,
   "start_distance_m": 972.0,
   "end_distance_m": 1022.0,
   "midpoint_distance_m": 997.0,
   "start_elevation_m": 195.46993305080412,
   "end_elevation_m": 189.69529066035747,
   "start_xy": [
    366559.2247223195,
    561115.844748382
   ],
   "end_xy": [
    366559.6152754448,
    561165.8432230413
   ]
  },
  "min_100m": {
   "gradient_pct": -4.5322432615150205,
   "start_distance_m": 922.0,
   "end_distance_m": 1022.0,
   "midpoint_distance_m": 972.0,
   "start_elevation_m": 194.2275339218725,
   "end_elevation_m": 189.69529066035747,
   "start_xy": [
    366558.8341691942,
    561065.8462737227
   ],
   "end_xy": [
    366559.6152754448,
    561165.8432230413
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.97579451742246,
   "start_distance_m": 474.0,
   "end_distance_m": 476.0,
   "midpoint_distance_m": 475.0,
   "start_elevation_m": 164.2891536484806,
   "end_elevation_m": 165.06866953882906,
   "start_xy": [
    366596.45011727815,
    560635.6027181261
   ],
   "end_xy": [
    366595.8259673431,
    560637.5028330855
   ]
  },
  "max_3m": {
   "gradient_pct": 35.31607818083652,
   "start_distance_m": 473.0,
   "end_distance_m": 476.0,
   "midpoint_distance_m": 474.5,
   "start_elevation_m": 164.00918719340396,
   "end_elevation_m": 165.06866953882906,
   "start_xy": [
    366596.7621922457,
    560634.6526606466
   ],
   "end_xy": [
    366595.8259673431,
    560637.5028330855
   ]
  }
 },
 "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": 0.031,
   "obstruction_max_height_m": 9.65,
   "flagged_windows_m": [
    5
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.013,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    236.0,
    241.0
   ],
   [
    250.0,
    256.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "descends_at_end"
  ],
  "suggested_summit_cut_m": 956.0,
  "trailing_descent_m": 6.5
 },
 "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/NY6560.tif"
  ],
  "calculated_at": "2026-08-16T02:01:00+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",
  "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": [
   "NY6560.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 16.9% over 200 m (Terrain 50), gain 35.9 m over 446 m way. EXTENDED by graph walk: +1 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting."
 },
 "area": {
  "place": "Kellah",
  "county": "Northumberland"
 }
}