{
 "ocl_version": "0.1.0",
 "name": "Prior Avenue",
 "slug": "prior-avenue",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.088456398813207,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 444.0,
   "end_distance_m": 446.0,
   "start_elevation_m": 159.3247047224534,
   "end_elevation_m": 159.80647385042965,
   "min_gradient_pct": -4.14857761221441
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.609670040942394,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 455.0,
   "end_distance_m": 458.0,
   "start_elevation_m": 161.86471555884566,
   "end_elevation_m": 162.57300566007393,
   "min_gradient_pct": -3.895245036004743
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.387689759881027,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 444.0,
   "end_distance_m": 449.0,
   "start_elevation_m": 159.3247047224534,
   "end_elevation_m": 160.49408921044744,
   "min_gradient_pct": -3.776956437637864
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.059800749147144,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 448.0,
   "end_distance_m": 458.0,
   "start_elevation_m": 160.26702558515922,
   "end_elevation_m": 162.57300566007393,
   "min_gradient_pct": -3.29823308591358
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.412230115928935,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 442.0,
   "end_distance_m": 462.0,
   "start_elevation_m": 158.9086199441076,
   "end_elevation_m": 163.3910659672934,
   "min_gradient_pct": -2.8126531193792914
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.15327227104501,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 443.0,
   "end_distance_m": 468.0,
   "start_elevation_m": 159.1188520243286,
   "end_elevation_m": 164.65717009208984,
   "min_gradient_pct": -2.538567226413079
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.36132158798972,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 427.0,
   "end_distance_m": 477.0,
   "start_elevation_m": 156.22185401750806,
   "end_elevation_m": 166.40251481150293,
   "min_gradient_pct": -0.24321317634843354
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.158385179214406,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 379.0,
   "end_distance_m": 479.0,
   "start_elevation_m": 149.55613061454267,
   "end_elevation_m": 166.71451579375707,
   "min_gradient_pct": 2.0778450092988408
  }
 ],
 "shape": {
  "ascent_concentration": 0.591,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 137.0,
  "shape_class": "stepped"
 },
 "length_m": 617.3811991350595,
 "start_elevation_m": 133.78486980346813,
 "end_elevation_m": 170.77306448553492,
 "endpoint_gain_m": 36.98819468206679,
 "overall_gradient_pct": 5.991143678150001,
 "accumulated_ascent_m": 37.763687028620296,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.387689759881027,
   "start_distance_m": 444.0,
   "end_distance_m": 449.0,
   "midpoint_distance_m": 446.5,
   "start_elevation_m": 159.3247047224534,
   "end_elevation_m": 160.49408921044744,
   "start_xy": [
    416948.49490756256,
    501337.80546663585
   ],
   "end_xy": [
    416947.3898280048,
    501342.68181762565
   ]
  },
  "max_10m": {
   "gradient_pct": 23.059800749147144,
   "start_distance_m": 448.0,
   "end_distance_m": 458.0,
   "midpoint_distance_m": 453.0,
   "start_elevation_m": 160.26702558515922,
   "end_elevation_m": 162.57300566007393,
   "start_xy": [
    416947.6108870355,
    501341.70655719633
   ],
   "end_xy": [
    416945.4745017389,
    501351.4739590577
   ]
  },
  "max_20m": {
   "gradient_pct": 22.412230115928935,
   "start_distance_m": 442.0,
   "end_distance_m": 462.0,
   "midpoint_distance_m": 452.0,
   "start_elevation_m": 158.9086199441076,
   "end_elevation_m": 163.3910659672934,
   "start_xy": [
    416948.9378655706,
    501335.8551366657
   ],
   "end_xy": [
    416944.81997242273,
    501355.4200441176
   ]
  },
  "max_25m": {
   "gradient_pct": 22.15327227104501,
   "start_distance_m": 443.0,
   "end_distance_m": 468.0,
   "midpoint_distance_m": 455.5,
   "start_elevation_m": 159.1188520243286,
   "end_elevation_m": 164.65717009208984,
   "start_xy": [
    416948.7164569162,
    501336.83031759784
   ],
   "end_xy": [
    416944.2687977379,
    501361.3725527083
   ]
  },
  "max_50m": {
   "gradient_pct": 20.36132158798972,
   "start_distance_m": 427.0,
   "end_distance_m": 477.0,
   "midpoint_distance_m": 452.0,
   "start_elevation_m": 156.22185401750806,
   "end_elevation_m": 166.40251481150293,
   "start_xy": [
    416952.4981293933,
    501321.2876619188
   ],
   "end_xy": [
    416944.7637418431,
    501370.3443404393
   ]
  },
  "max_100m": {
   "gradient_pct": 17.158385179214406,
   "start_distance_m": 379.0,
   "end_distance_m": 479.0,
   "midpoint_distance_m": 429.0,
   "start_elevation_m": 149.55613061454267,
   "end_elevation_m": 166.71451579375707,
   "start_xy": [
    416965.38869711495,
    501275.05095903773
   ],
   "end_xy": [
    416945.05071534566,
    501372.32364470075
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.776956437637864,
   "start_distance_m": 491.0,
   "end_distance_m": 496.0,
   "midpoint_distance_m": 493.5,
   "start_elevation_m": 166.97296047179802,
   "end_elevation_m": 166.78411264991612,
   "start_xy": [
    416952.95541686646,
    501377.35691366746
   ],
   "end_xy": [
    416957.9553899161,
    501377.37318516977
   ]
  },
  "min_10m": {
   "gradient_pct": -3.29823308591358,
   "start_distance_m": 486.0,
   "end_distance_m": 496.0,
   "midpoint_distance_m": 491.0,
   "start_elevation_m": 167.11393595850748,
   "end_elevation_m": 166.78411264991612,
   "start_xy": [
    416947.9554454157,
    501377.34018533624
   ],
   "end_xy": [
    416957.9553899161,
    501377.37318516977
   ]
  },
  "min_20m": {
   "gradient_pct": -2.8126531193792914,
   "start_distance_m": 484.0,
   "end_distance_m": 504.0,
   "midpoint_distance_m": 494.0,
   "start_elevation_m": 167.1544282110385,
   "end_elevation_m": 166.59189758716263,
   "start_xy": [
    416946.0378713588,
    501377.1391510218
   ],
   "end_xy": [
    416965.95534436725,
    501377.3999133775
   ]
  },
  "min_25m": {
   "gradient_pct": -2.538567226413079,
   "start_distance_m": 486.0,
   "end_distance_m": 511.0,
   "midpoint_distance_m": 498.5,
   "start_elevation_m": 167.11393595850748,
   "end_elevation_m": 166.4792941519042,
   "start_xy": [
    416947.9554454157,
    501377.34018533624
   ],
   "end_xy": [
    416972.95530586765,
    501377.42291322345
   ]
  },
  "min_50m": {
   "gradient_pct": -0.24321317634843354,
   "start_distance_m": 483.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 508.0,
   "start_elevation_m": 167.14563235932872,
   "end_elevation_m": 167.0240257711545,
   "start_xy": [
    416945.6248003218,
    501376.2822329974
   ],
   "end_xy": [
    416994.23553373164,
    501382.51002396096
   ]
  },
  "min_100m": {
   "gradient_pct": 2.0778450092988408,
   "start_distance_m": 222.0,
   "end_distance_m": 322.0,
   "midpoint_distance_m": 272.0,
   "start_elevation_m": 142.58316101408718,
   "end_elevation_m": 144.66100602338602,
   "start_xy": [
    417099.7584171148,
    501241.925971155
   ],
   "end_xy": [
    416999.7894476392,
    501244.41666380904
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.088456398813207,
   "start_distance_m": 444.0,
   "end_distance_m": 446.0,
   "midpoint_distance_m": 445.0,
   "start_elevation_m": 159.3247047224534,
   "end_elevation_m": 159.80647385042965,
   "start_xy": [
    416948.49490756256,
    501337.80546663585
   ],
   "end_xy": [
    416948.05289398803,
    501339.75601116597
   ]
  },
  "max_3m": {
   "gradient_pct": 23.609670040942394,
   "start_distance_m": 455.0,
   "end_distance_m": 458.0,
   "midpoint_distance_m": 456.5,
   "start_elevation_m": 161.86471555884566,
   "end_elevation_m": 162.57300566007393,
   "start_xy": [
    416946.06295398425,
    501348.5332618341
   ],
   "end_xy": [
    416945.4745017389,
    501351.4739590577
   ]
  }
 },
 "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": 0.04,
   "obstruction_max_height_m": 11.75,
   "flagged_windows_m": []
  },
  "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/NZ1500.tif"
  ],
  "calculated_at": "2026-08-19T18:44:16+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": [
   "NZ1500.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.8% over 200 m (Terrain 50), gain 21.6 m over 136 m way. EXTENDED by graph walk: +5 segment(s) at base, +1 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."
 },
 "area": {
  "place": "Richmond",
  "county": "North Yorkshire"
 }
}