{
 "ocl_version": "0.1.0",
 "name": "Eastwood Lane",
 "slug": "eastwood-lane",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 35.06288700973528,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 818.0,
   "end_distance_m": 820.0,
   "start_elevation_m": 216.444203610183,
   "end_elevation_m": 217.1454613503777,
   "min_gradient_pct": -7.904429860120388
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.686967986374306,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 819.0,
   "end_distance_m": 822.0,
   "start_elevation_m": 216.7510508319072,
   "end_elevation_m": 217.73165987149844,
   "min_gradient_pct": -5.1513484160021035
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 30.686994711727493,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 849.0,
   "end_distance_m": 854.0,
   "start_elevation_m": 220.86202924951633,
   "end_elevation_m": 222.3963789851027,
   "min_gradient_pct": -3.4758950502208563
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.435715909189298,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 849.0,
   "end_distance_m": 859.0,
   "start_elevation_m": 220.86202924951633,
   "end_elevation_m": 223.90560084043526,
   "min_gradient_pct": -2.7320693434575105
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.122383566944706,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 840.0,
   "end_distance_m": 860.0,
   "start_elevation_m": 218.76468135090352,
   "end_elevation_m": 224.18915806429246,
   "min_gradient_pct": -0.7075587504988334
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.447702584820377,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 838.0,
   "end_distance_m": 863.0,
   "start_elevation_m": 218.50751377250944,
   "end_elevation_m": 224.61943941871453,
   "min_gradient_pct": -0.11022845797651826
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.382158604535505,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 810.0,
   "end_distance_m": 860.0,
   "start_elevation_m": 214.4980787620247,
   "end_elevation_m": 224.18915806429246,
   "min_gradient_pct": 1.493434658330898
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.298664602931865,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 762.0,
   "end_distance_m": 862.0,
   "start_elevation_m": 207.21321546913575,
   "end_elevation_m": 224.5118800720676,
   "min_gradient_pct": 3.0049828172950583
  }
 ],
 "shape": {
  "ascent_concentration": 0.452,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 136.0,
  "shape_class": "stepped"
 },
 "length_m": 1007.999999999999,
 "start_elevation_m": 159.5277020947258,
 "end_elevation_m": 242.70816147550642,
 "endpoint_gain_m": 83.1804593807806,
 "overall_gradient_pct": 8.252029700474276,
 "accumulated_ascent_m": 83.775692350329,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 30.686994711727493,
   "start_distance_m": 849.0,
   "end_distance_m": 854.0,
   "midpoint_distance_m": 851.5,
   "start_elevation_m": 220.86202924951633,
   "end_elevation_m": 222.3963789851027,
   "start_xy": [
    436105.4132172678,
    362747.7050210696
   ],
   "end_xy": [
    436108.68760565907,
    362743.9300352799
   ]
  },
  "max_10m": {
   "gradient_pct": 30.435715909189298,
   "start_distance_m": 849.0,
   "end_distance_m": 859.0,
   "midpoint_distance_m": 854.0,
   "start_elevation_m": 220.86202924951633,
   "end_elevation_m": 223.90560084043526,
   "start_xy": [
    436105.4132172678,
    362747.7050210696
   ],
   "end_xy": [
    436111.99539115734,
    362740.18056130374
   ]
  },
  "max_20m": {
   "gradient_pct": 27.122383566944706,
   "start_distance_m": 840.0,
   "end_distance_m": 860.0,
   "midpoint_distance_m": 850.0,
   "start_elevation_m": 218.76468135090352,
   "end_elevation_m": 224.18915806429246,
   "start_xy": [
    436100.4676575811,
    362755.22442526044
   ],
   "end_xy": [
    436112.656948257,
    362739.43066650856
   ]
  },
  "max_25m": {
   "gradient_pct": 24.447702584820377,
   "start_distance_m": 838.0,
   "end_distance_m": 863.0,
   "midpoint_distance_m": 850.5,
   "start_elevation_m": 218.50751377250944,
   "end_elevation_m": 224.61943941871453,
   "start_xy": [
    436099.3686443174,
    362756.89540396957
   ],
   "end_xy": [
    436115.0324587477,
    362737.6209160531
   ]
  },
  "max_50m": {
   "gradient_pct": 19.382158604535505,
   "start_distance_m": 810.0,
   "end_distance_m": 860.0,
   "midpoint_distance_m": 835.0,
   "start_elevation_m": 214.4980787620247,
   "end_elevation_m": 224.18915806429246,
   "start_xy": [
    436083.7352896528,
    362780.1218576933
   ],
   "end_xy": [
    436112.656948257,
    362739.43066650856
   ]
  },
  "max_100m": {
   "gradient_pct": 17.298664602931865,
   "start_distance_m": 762.0,
   "end_distance_m": 862.0,
   "midpoint_distance_m": 812.0,
   "start_elevation_m": 207.21321546913575,
   "end_elevation_m": 224.5118800720676,
   "start_xy": [
    436047.19281886215,
    362807.6867727781
   ],
   "end_xy": [
    436114.2098657157,
    362738.18954660435
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.4758950502208563,
   "start_distance_m": 205.0,
   "end_distance_m": 210.0,
   "midpoint_distance_m": 207.5,
   "start_elevation_m": 168.94172585586983,
   "end_elevation_m": 168.7679311033588,
   "start_xy": [
    435617.9876207121,
    362533.8712966003
   ],
   "end_xy": [
    435621.6644470988,
    362537.2596513223
   ]
  },
  "min_10m": {
   "gradient_pct": -2.7320693434575105,
   "start_distance_m": 205.0,
   "end_distance_m": 215.0,
   "midpoint_distance_m": 210.0,
   "start_elevation_m": 168.94172585586983,
   "end_elevation_m": 168.66851892152408,
   "start_xy": [
    435617.9876207121,
    362533.8712966003
   ],
   "end_xy": [
    435625.3412734855,
    362540.64800604427
   ]
  },
  "min_20m": {
   "gradient_pct": -0.7075587504988334,
   "start_distance_m": 202.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 212.0,
   "start_elevation_m": 168.9034251999118,
   "end_elevation_m": 168.76191344981203,
   "start_xy": [
    435616.44950801274,
    362531.5671562865
   ],
   "end_xy": [
    435630.48883042694,
    362545.39170265506
   ]
  },
  "min_25m": {
   "gradient_pct": -0.11022845797651826,
   "start_distance_m": 200.0,
   "end_distance_m": 225.0,
   "midpoint_distance_m": 212.5,
   "start_elevation_m": 168.84851403152433,
   "end_elevation_m": 168.8209569170302,
   "start_xy": [
    435616.5595699496,
    362529.57018699026
   ],
   "end_xy": [
    435632.69492625893,
    362547.4247154883
   ]
  },
  "min_50m": {
   "gradient_pct": 1.493434658330898,
   "start_distance_m": 184.0,
   "end_distance_m": 234.0,
   "midpoint_distance_m": 209.0,
   "start_elevation_m": 168.39035255484103,
   "end_elevation_m": 169.13706988400648,
   "start_xy": [
    435617.5699446869,
    362513.6075299762
   ],
   "end_xy": [
    435637.53087245644,
    362554.9145437088
   ]
  },
  "min_100m": {
   "gradient_pct": 3.0049828172950583,
   "start_distance_m": 175.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 225.0,
   "start_elevation_m": 167.99374670496823,
   "end_elevation_m": 170.9987295222633,
   "start_xy": [
    435618.8788079628,
    362504.70321209525
   ],
   "end_xy": [
    435663.8216979702,
    362585.70001800946
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 35.06288700973528,
   "start_distance_m": 818.0,
   "end_distance_m": 820.0,
   "midpoint_distance_m": 819.0,
   "start_elevation_m": 216.444203610183,
   "end_elevation_m": 217.1454613503777,
   "start_xy": [
    436088.30509512284,
    362773.55551335524
   ],
   "end_xy": [
    436089.44754649035,
    362771.91392727074
   ]
  },
  "max_3m": {
   "gradient_pct": 32.686967986374306,
   "start_distance_m": 819.0,
   "end_distance_m": 822.0,
   "midpoint_distance_m": 820.5,
   "start_elevation_m": 216.7510508319072,
   "end_elevation_m": 217.73165987149844,
   "start_xy": [
    436088.87632080656,
    362772.734720313
   ],
   "end_xy": [
    436090.5765382077,
    362770.26323364215
   ]
  }
 },
 "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": 0.019,
   "obstruction_max_height_m": 6.97,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "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/SK3560.tif"
  ],
  "calculated_at": "2026-08-19T17:17:38+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": [
   "SK3560.tif"
  ],
  "route_summit_trim_m": 112.2,
  "route_summit_trim_loss_m": 5.3,
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.5% over 200 m (Terrain 50), gain 38.4 m over 551 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. DEDUPE: absorbed 1 overlapping proposal(s): eastwood-lane-2 ADOPTED (England launch slice 2026-08-16): clean-steep.",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Littlemoor",
  "county": "Derbyshire"
 }
}