{
 "ocl_version": "0.1.0",
 "name": "Great Witley to Abberley Hill",
 "slug": "discovered-street-52-2991-2-3663",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.397873940841464,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 149.0,
   "end_distance_m": 151.0,
   "start_elevation_m": 187.06784086227452,
   "end_elevation_m": 187.81579834109135,
   "min_gradient_pct": 3.171947969036637
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.19744734691517,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 148.0,
   "end_distance_m": 151.0,
   "start_elevation_m": 186.6998749206839,
   "end_elevation_m": 187.81579834109135,
   "min_gradient_pct": 3.695228130053844
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 36.52112902458725,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 147.0,
   "end_distance_m": 152.0,
   "start_elevation_m": 186.332146794997,
   "end_elevation_m": 188.15820324622635,
   "min_gradient_pct": 4.188551622796695
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 32.12483702571632,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 143.0,
   "end_distance_m": 153.0,
   "start_elevation_m": 185.20420283774934,
   "end_elevation_m": 188.41668654032097,
   "min_gradient_pct": 4.205867228183706
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 29.994716079840487,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 132.0,
   "end_distance_m": 152.0,
   "start_elevation_m": 182.15926003025825,
   "end_elevation_m": 188.15820324622635,
   "min_gradient_pct": 5.164405429333243
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 29.32963244293296,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 127.0,
   "end_distance_m": 152.0,
   "start_elevation_m": 180.8257951354931,
   "end_elevation_m": 188.15820324622635,
   "min_gradient_pct": 5.7093361121137605
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 26.013707649600345,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 103.0,
   "end_distance_m": 153.0,
   "start_elevation_m": 175.4098327155208,
   "end_elevation_m": 188.41668654032097,
   "min_gradient_pct": 8.072835741584527
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.167330778802864,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 61.0,
   "end_distance_m": 161.0,
   "start_elevation_m": 169.01217346016287,
   "end_elevation_m": 189.17950423896573,
   "min_gradient_pct": 12.317428564784136
  }
 ],
 "shape": {
  "ascent_concentration": 0.343,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 129.0,
  "shape_class": "sustained"
 },
 "length_m": 308.9619408806616,
 "start_elevation_m": 162.49696548010405,
 "end_elevation_m": 213.7943983045059,
 "endpoint_gain_m": 51.29743282440185,
 "overall_gradient_pct": 16.60315593505926,
 "accumulated_ascent_m": 51.29984541903164,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 36.52112902458725,
   "start_distance_m": 147.0,
   "end_distance_m": 152.0,
   "midpoint_distance_m": 149.5,
   "start_elevation_m": 186.332146794997,
   "end_elevation_m": 188.15820324622635,
   "start_xy": [
    375081.6100340987,
    266781.4009001317
   ],
   "end_xy": [
    375083.70389820606,
    266785.9354447227
   ]
  },
  "max_10m": {
   "gradient_pct": 32.12483702571632,
   "start_distance_m": 143.0,
   "end_distance_m": 153.0,
   "midpoint_distance_m": 148.0,
   "start_elevation_m": 185.20420283774934,
   "end_elevation_m": 188.41668654032097,
   "start_xy": [
    375079.6637796612,
    266777.93673602946
   ],
   "end_xy": [
    375083.72104632814,
    266786.93333247746
   ]
  },
  "max_20m": {
   "gradient_pct": 29.994716079840487,
   "start_distance_m": 132.0,
   "end_distance_m": 152.0,
   "midpoint_distance_m": 142.0,
   "start_elevation_m": 182.15926003025825,
   "end_elevation_m": 188.15820324622635,
   "start_xy": [
    375069.540321405,
    266773.88255634095
   ],
   "end_xy": [
    375083.70389820606,
    266785.9354447227
   ]
  },
  "max_25m": {
   "gradient_pct": 29.32963244293296,
   "start_distance_m": 127.0,
   "end_distance_m": 152.0,
   "midpoint_distance_m": 139.5,
   "start_elevation_m": 180.8257951354931,
   "end_elevation_m": 188.15820324622635,
   "start_xy": [
    375064.81739930727,
    266772.24121501355
   ],
   "end_xy": [
    375083.70389820606,
    266785.9354447227
   ]
  },
  "max_50m": {
   "gradient_pct": 26.013707649600345,
   "start_distance_m": 103.0,
   "end_distance_m": 153.0,
   "midpoint_distance_m": 128.0,
   "start_elevation_m": 175.4098327155208,
   "end_elevation_m": 188.41668654032097,
   "start_xy": [
    375042.14816397004,
    266764.3605015303
   ],
   "end_xy": [
    375083.72104632814,
    266786.93333247746
   ]
  },
  "max_100m": {
   "gradient_pct": 20.167330778802864,
   "start_distance_m": 61.0,
   "end_distance_m": 161.0,
   "midpoint_distance_m": 111.0,
   "start_elevation_m": 169.01217346016287,
   "end_elevation_m": 189.17950423896573,
   "start_xy": [
    375001.2930771435,
    266762.4757063812
   ],
   "end_xy": [
    375078.46551594656,
    266792.7581604008
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 4.188551622796695,
   "start_distance_m": 44.0,
   "end_distance_m": 49.0,
   "midpoint_distance_m": 46.5,
   "start_elevation_m": 168.03007381018995,
   "end_elevation_m": 168.23950139132978,
   "start_xy": [
    374986.15907464194,
    266770.2192034134
   ],
   "end_xy": [
    374990.61040792527,
    266767.942006726
   ]
  },
  "min_10m": {
   "gradient_pct": 4.205867228183706,
   "start_distance_m": 39.0,
   "end_distance_m": 49.0,
   "midpoint_distance_m": 44.0,
   "start_elevation_m": 167.8189146685114,
   "end_elevation_m": 168.23950139132978,
   "start_xy": [
    374981.70812544564,
    266772.49715145706
   ],
   "end_xy": [
    374990.61040792527,
    266767.942006726
   ]
  },
  "min_20m": {
   "gradient_pct": 5.164405429333243,
   "start_distance_m": 38.0,
   "end_distance_m": 58.0,
   "midpoint_distance_m": 48.0,
   "start_elevation_m": 167.7530631145009,
   "end_elevation_m": 168.78594420036754,
   "start_xy": [
    374980.8177463554,
    266772.95237124525
   ],
   "end_xy": [
    374998.6223009516,
    266763.8420615349
   ]
  },
  "min_25m": {
   "gradient_pct": 5.7093361121137605,
   "start_distance_m": 37.0,
   "end_distance_m": 62.0,
   "midpoint_distance_m": 49.5,
   "start_elevation_m": 167.65316888752193,
   "end_elevation_m": 169.08050291555037,
   "start_xy": [
    374979.92754966917,
    266773.407947644
   ],
   "end_xy": [
    375002.19401620096,
    266762.04519747366
   ]
  },
  "min_50m": {
   "gradient_pct": 8.072835741584527,
   "start_distance_m": 25.0,
   "end_distance_m": 75.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 166.71340193815303,
   "end_elevation_m": 170.7498198089453,
   "start_xy": [
    374969.2448983342,
    266778.87429354823
   ],
   "end_xy": [
    375015.0842171159,
    266760.3591711441
   ]
  },
  "min_100m": {
   "gradient_pct": 12.317428564784136,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 162.49696548010405,
   "end_elevation_m": 174.8143940448882,
   "start_xy": [
    374949.346,
    266763.766
   ],
   "end_xy": [
    375039.31444450334,
    266763.37559919746
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.397873940841464,
   "start_distance_m": 149.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 150.0,
   "start_elevation_m": 187.06784086227452,
   "end_elevation_m": 187.81579834109135,
   "start_xy": [
    375082.4760123051,
    266783.2036983569
   ],
   "end_xy": [
    375083.3401331597,
    266785.0073012421
   ]
  },
  "max_3m": {
   "gradient_pct": 37.19744734691517,
   "start_distance_m": 148.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 149.5,
   "start_elevation_m": 186.6998749206839,
   "end_elevation_m": 187.81579834109135,
   "start_xy": [
    375082.0428173137,
    266782.30239815154
   ],
   "end_xy": [
    375083.3401331597,
    266785.0073012421
   ]
  }
 },
 "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": 0.058,
   "obstruction_max_height_m": 8.86,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "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/dtm_1m/E374000_N266000_2000m.tif"
  ],
  "calculated_at": "2026-09-15T20:59:13+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-27.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "retro-260915-dogleg-all",
  "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": [
   "E374000_N266000_2000m.tif"
  ],
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Great Witley",
  "county": "Worcestershire"
 }
}