{
 "ocl_version": "0.1.0",
 "name": "Aggs Hill",
 "slug": "aggs-hill",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.76751654148313,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 722.0,
   "end_distance_m": 724.0,
   "start_elevation_m": 215.52989009499933,
   "end_elevation_m": 216.185240425829,
   "min_gradient_pct": -10.1066306396973
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.379260865890917,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 722.0,
   "end_distance_m": 725.0,
   "start_elevation_m": 215.52989009499933,
   "end_elevation_m": 216.41126792097606,
   "min_gradient_pct": -7.8721346714416995
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.835016090707995,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 611.0,
   "end_distance_m": 616.0,
   "start_elevation_m": 200.06407280714532,
   "end_elevation_m": 201.30582361168072,
   "min_gradient_pct": -4.913122186123928
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.613322167905267,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 715.0,
   "end_distance_m": 725.0,
   "start_elevation_m": 214.24993570418553,
   "end_elevation_m": 216.41126792097606,
   "min_gradient_pct": -2.0902897731889425
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.113829648570913,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 477.0,
   "end_distance_m": 497.0,
   "start_elevation_m": 177.17432013190407,
   "end_elevation_m": 181.19708606161825,
   "min_gradient_pct": 0.641675865265654
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.014963251463314,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 479.0,
   "end_distance_m": 504.0,
   "start_elevation_m": 177.583091526619,
   "end_elevation_m": 182.58683233948483,
   "min_gradient_pct": 0.6737184915568832
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.750942755460244,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 475.0,
   "end_distance_m": 525.0,
   "start_elevation_m": 176.79292413136585,
   "end_elevation_m": 186.66839550909597,
   "min_gradient_pct": 1.1903088712780345
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.23809900330292,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 447.0,
   "end_distance_m": 547.0,
   "start_elevation_m": 171.57364930505582,
   "end_elevation_m": 190.81174830835874,
   "min_gradient_pct": 2.0363565349467194
  }
 ],
 "shape": {
  "ascent_concentration": 0.445,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 265.0,
  "shape_class": "sustained"
 },
 "length_m": 2367.379675726121,
 "start_elevation_m": 127.18606847776006,
 "end_elevation_m": 316.1612929672858,
 "endpoint_gain_m": 188.97522448952577,
 "overall_gradient_pct": 7.982463752104462,
 "accumulated_ascent_m": 190.23235377349386,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.835016090707995,
   "start_distance_m": 611.0,
   "end_distance_m": 616.0,
   "midpoint_distance_m": 613.5,
   "start_elevation_m": 200.06407280714532,
   "end_elevation_m": 201.30582361168072,
   "start_xy": [
    398132.96179355215,
    222401.39996720644
   ],
   "end_xy": [
    398137.96179255215,
    222401.39796720742
   ]
  },
  "max_10m": {
   "gradient_pct": 21.613322167905267,
   "start_distance_m": 715.0,
   "end_distance_m": 725.0,
   "midpoint_distance_m": 720.0,
   "start_elevation_m": 214.24993570418553,
   "end_elevation_m": 216.41126792097606,
   "start_xy": [
    398232.4484780791,
    222426.9775946608
   ],
   "end_xy": [
    398241.8411237424,
    222430.40953095572
   ]
  },
  "max_20m": {
   "gradient_pct": 20.113829648570913,
   "start_distance_m": 477.0,
   "end_distance_m": 497.0,
   "midpoint_distance_m": 487.0,
   "start_elevation_m": 177.17432013190407,
   "end_elevation_m": 181.19708606161825,
   "start_xy": [
    398000.89161995944,
    222392.9792744555
   ],
   "end_xy": [
    398020.0496374931,
    222398.7212508591
   ]
  },
  "max_25m": {
   "gradient_pct": 20.014963251463314,
   "start_distance_m": 479.0,
   "end_distance_m": 504.0,
   "midpoint_distance_m": 491.5,
   "start_elevation_m": 177.583091526619,
   "end_elevation_m": 182.58683233948483,
   "start_xy": [
    398002.80721720937,
    222393.5541537986
   ],
   "end_xy": [
    398026.7563714475,
    222400.72617143422
   ]
  },
  "max_50m": {
   "gradient_pct": 19.750942755460244,
   "start_distance_m": 475.0,
   "end_distance_m": 525.0,
   "midpoint_distance_m": 500.0,
   "start_elevation_m": 176.79292413136585,
   "end_elevation_m": 186.66839550909597,
   "start_xy": [
    397998.97574736073,
    222392.4053126227
   ],
   "end_xy": [
    398047.32092898566,
    222404.8946016725
   ]
  },
  "max_100m": {
   "gradient_pct": 19.23809900330292,
   "start_distance_m": 447.0,
   "end_distance_m": 547.0,
   "midpoint_distance_m": 497.0,
   "start_elevation_m": 171.57364930505582,
   "end_elevation_m": 190.81174830835874,
   "start_xy": [
    397972.15487983054,
    222384.36535230832
   ],
   "end_xy": [
    398069.26565675077,
    222406.17758837785
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.913122186123928,
   "start_distance_m": 2250.0,
   "end_distance_m": 2255.0,
   "midpoint_distance_m": 2252.5,
   "start_elevation_m": 311.171398168168,
   "end_elevation_m": 310.92574205886183,
   "start_xy": [
    399412.60826275276,
    222909.9735843109
   ],
   "end_xy": [
    399412.91722824366,
    222914.96402882502
   ]
  },
  "min_10m": {
   "gradient_pct": -2.0902897731889425,
   "start_distance_m": 1825.0,
   "end_distance_m": 1835.0,
   "midpoint_distance_m": 1830.0,
   "start_elevation_m": 282.6663586972398,
   "end_elevation_m": 282.4573297199209,
   "start_xy": [
    399319.1131301376,
    222515.1627303954
   ],
   "end_xy": [
    399329.0261926294,
    222513.86609583
   ]
  },
  "min_20m": {
   "gradient_pct": 0.641675865265654,
   "start_distance_m": 1771.0,
   "end_distance_m": 1791.0,
   "midpoint_distance_m": 1781.0,
   "start_elevation_m": 281.30104050089295,
   "end_elevation_m": 281.4293756739461,
   "start_xy": [
    399265.5860478228,
    222522.2937413596
   ],
   "end_xy": [
    399285.41091085086,
    222519.65275960413
   ]
  },
  "min_25m": {
   "gradient_pct": 0.6737184915568832,
   "start_distance_m": 1766.0,
   "end_distance_m": 1791.0,
   "midpoint_distance_m": 1778.5,
   "start_elevation_m": 281.26094605105686,
   "end_elevation_m": 281.4293756739461,
   "start_xy": [
    399260.6298035808,
    222522.95377389237
   ],
   "end_xy": [
    399285.41091085086,
    222519.65275960413
   ]
  },
  "min_50m": {
   "gradient_pct": 1.1903088712780345,
   "start_distance_m": 1761.0,
   "end_distance_m": 1811.0,
   "midpoint_distance_m": 1786.0,
   "start_elevation_m": 281.1794794758021,
   "end_elevation_m": 281.77463391144113,
   "start_xy": [
    399255.67369070265,
    222523.61478892757
   ],
   "end_xy": [
    399305.235774009,
    222517.0117778313
   ]
  },
  "min_100m": {
   "gradient_pct": 2.0363565349467194,
   "start_distance_m": 1710.0,
   "end_distance_m": 1810.0,
   "midpoint_distance_m": 1760.0,
   "start_elevation_m": 279.7068929018087,
   "end_elevation_m": 281.74324943675543,
   "start_xy": [
    399205.1309658559,
    222530.42499297604
   ],
   "end_xy": [
    399304.2445286454,
    222517.14381051343
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.76751654148313,
   "start_distance_m": 722.0,
   "end_distance_m": 724.0,
   "midpoint_distance_m": 723.0,
   "start_elevation_m": 215.52989009499933,
   "end_elevation_m": 216.185240425829,
   "start_xy": [
    398239.0231338071,
    222429.38048657705
   ],
   "end_xy": [
    398240.9018433247,
    222430.06638046898
   ]
  },
  "max_3m": {
   "gradient_pct": 29.379260865890917,
   "start_distance_m": 722.0,
   "end_distance_m": 725.0,
   "midpoint_distance_m": 723.5,
   "start_elevation_m": 215.52989009499933,
   "end_elevation_m": 216.41126792097606,
   "start_xy": [
    398239.0231338071,
    222429.38048657705
   ],
   "end_xy": [
    398241.8411237424,
    222430.40953095572
   ]
  }
 },
 "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": 0.05,
   "obstruction_max_height_m": 11.31,
   "flagged_windows_m": [
    2,
    3,
    5,
    10
   ]
  },
  "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/SO9520.tif"
  ],
  "calculated_at": "2026-08-19T18:03:29+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": [
   "SO9520.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 16.1% over 200 m (Terrain 50), gain 100.4 m over 821 m way. EXTENDED by graph walk: +1 segment(s) at base, +5 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): discovered-lane-51-9008-2-0236 ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Battledown",
  "county": "Gloucestershire"
 }
}