{
 "ocl_version": "0.1.0",
 "name": "Ham Lane",
 "slug": "ham-lane-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.83016148295451,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 164.0,
   "end_distance_m": 166.0,
   "start_elevation_m": 189.5589505347183,
   "end_elevation_m": 190.39555376437738,
   "min_gradient_pct": -5.5411803106792945
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.249923353619884,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 164.0,
   "end_distance_m": 167.0,
   "start_elevation_m": 189.5589505347183,
   "end_elevation_m": 190.7064482353269,
   "min_gradient_pct": -3.879636980188176
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.9434880070454,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 167.0,
   "start_elevation_m": 189.05927383497462,
   "end_elevation_m": 190.7064482353269,
   "min_gradient_pct": 0.18381100563487962
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.84373268775539,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 160.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 188.50986441520772,
   "end_elevation_m": 191.29423768398325,
   "min_gradient_pct": 4.171675920441373
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.859834880266106,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 160.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 188.50986441520772,
   "end_elevation_m": 193.28183139126094,
   "min_gradient_pct": 5.9724295801160565
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.81305328005965,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 155.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 187.57856807124602,
   "end_elevation_m": 193.28183139126094,
   "min_gradient_pct": 6.312931921490758
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.213857506665647,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 155.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 187.57856807124602,
   "end_elevation_m": 197.68549682457885,
   "min_gradient_pct": 8.600344424415425
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.605463849013063,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 138.0,
   "end_distance_m": 238.0,
   "start_elevation_m": 185.88870344250228,
   "end_elevation_m": 203.49416729151534,
   "min_gradient_pct": 10.473149174958394
  }
 ],
 "shape": {
  "ascent_concentration": 0.367,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 100.0,
  "shape_class": "sustained"
 },
 "length_m": 325.3325768894944,
 "start_elevation_m": 168.7404105976578,
 "end_elevation_m": 211.26480890588377,
 "endpoint_gain_m": 42.524398308225955,
 "overall_gradient_pct": 13.071054462114379,
 "accumulated_ascent_m": 42.8687872716622,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.9434880070454,
   "start_distance_m": 162.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 164.5,
   "start_elevation_m": 189.05927383497462,
   "end_elevation_m": 190.7064482353269,
   "start_xy": [
    355728.00494658534,
    166989.35374498606
   ],
   "end_xy": [
    355730.90306546364,
    166985.27932392695
   ]
  },
  "max_10m": {
   "gradient_pct": 27.84373268775539,
   "start_distance_m": 160.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 165.0,
   "start_elevation_m": 188.50986441520772,
   "end_elevation_m": 191.29423768398325,
   "start_xy": [
    355726.845699034,
    166990.9835134097
   ],
   "end_xy": [
    355732.64193679066,
    166982.83467129146
   ]
  },
  "max_20m": {
   "gradient_pct": 23.859834880266106,
   "start_distance_m": 160.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 170.0,
   "start_elevation_m": 188.50986441520772,
   "end_elevation_m": 193.28183139126094,
   "start_xy": [
    355726.845699034,
    166990.9835134097
   ],
   "end_xy": [
    355737.3051128195,
    166973.98903643954
   ]
  },
  "max_25m": {
   "gradient_pct": 22.81305328005965,
   "start_distance_m": 155.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 167.5,
   "start_elevation_m": 187.57856807124602,
   "end_elevation_m": 193.28183139126094,
   "start_xy": [
    355723.96785077464,
    166995.07218262402
   ],
   "end_xy": [
    355737.3051128195,
    166973.98903643954
   ]
  },
  "max_50m": {
   "gradient_pct": 20.213857506665647,
   "start_distance_m": 155.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 180.0,
   "start_elevation_m": 187.57856807124602,
   "end_elevation_m": 197.68549682457885,
   "start_xy": [
    355723.96785077464,
    166995.07218262402
   ],
   "end_xy": [
    355747.59593076777,
    166951.2063707451
   ]
  },
  "max_100m": {
   "gradient_pct": 17.605463849013063,
   "start_distance_m": 138.0,
   "end_distance_m": 238.0,
   "midpoint_distance_m": 188.0,
   "start_elevation_m": 185.88870344250228,
   "end_elevation_m": 203.49416729151534,
   "start_xy": [
    355714.269997965,
    167009.03469138438
   ],
   "end_xy": [
    355759.9838565672,
    166920.80139759235
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.18381100563487962,
   "start_distance_m": 94.0,
   "end_distance_m": 99.0,
   "midpoint_distance_m": 96.5,
   "start_elevation_m": 180.4821942434846,
   "end_elevation_m": 180.49138479376634,
   "start_xy": [
    355693.5488089467,
    167047.79894009623
   ],
   "end_xy": [
    355695.9615977041,
    167043.4196193256
   ]
  },
  "min_10m": {
   "gradient_pct": 4.171675920441373,
   "start_distance_m": 241.0,
   "end_distance_m": 251.0,
   "midpoint_distance_m": 246.0,
   "start_elevation_m": 203.9292419670163,
   "end_elevation_m": 204.34640955906045,
   "start_xy": [
    355760.013217577,
    166917.80154127395
   ],
   "end_xy": [
    355752.29200515634,
    166915.40100863297
   ]
  },
  "min_20m": {
   "gradient_pct": 5.9724295801160565,
   "start_distance_m": 241.0,
   "end_distance_m": 261.0,
   "midpoint_distance_m": 251.0,
   "start_elevation_m": 203.9292419670163,
   "end_elevation_m": 205.12372788303952,
   "start_xy": [
    355760.013217577,
    166917.80154127395
   ],
   "end_xy": [
    355742.4361093426,
    166913.8210433469
   ]
  },
  "min_25m": {
   "gradient_pct": 6.312931921490758,
   "start_distance_m": 242.0,
   "end_distance_m": 267.0,
   "midpoint_distance_m": 254.5,
   "start_elevation_m": 204.00068248918103,
   "end_elevation_m": 205.57891546955372,
   "start_xy": [
    355760.0230045803,
    166916.8015891678
   ],
   "end_xy": [
    355740.9639041331,
    166909.11655358583
   ]
  },
  "min_50m": {
   "gradient_pct": 8.600344424415425,
   "start_distance_m": 241.0,
   "end_distance_m": 291.0,
   "midpoint_distance_m": 266.0,
   "start_elevation_m": 203.9292419670163,
   "end_elevation_m": 208.22941417922402,
   "start_xy": [
    355760.013217577,
    166917.80154127395
   ],
   "end_xy": [
    355733.0908412282,
    166886.50953026954
   ]
  },
  "min_100m": {
   "gradient_pct": 10.473149174958394,
   "start_distance_m": 225.0,
   "end_distance_m": 325.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 200.76877322885514,
   "end_elevation_m": 211.24192240381353,
   "start_xy": [
    355755.9753697599,
    166933.0464106846
   ],
   "end_xy": [
    355722.15002275794,
    166855.45751465543
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.83016148295451,
   "start_distance_m": 164.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 165.0,
   "start_elevation_m": 189.5589505347183,
   "end_elevation_m": 190.39555376437738,
   "start_xy": [
    355729.1641941366,
    166987.7239765624
   ],
   "end_xy": [
    355730.323441688,
    166986.09420813876
   ]
  },
  "max_3m": {
   "gradient_pct": 38.249923353619884,
   "start_distance_m": 164.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 165.5,
   "start_elevation_m": 189.5589505347183,
   "end_elevation_m": 190.7064482353269,
   "start_xy": [
    355729.1641941366,
    166987.7239765624
   ],
   "end_xy": [
    355730.90306546364,
    166985.27932392695
   ]
  }
 },
 "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": 0.006,
   "obstruction_max_height_m": 7.12,
   "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/bulk_dtm_1m/ST5565.tif"
  ],
  "calculated_at": "2026-09-05T01:38:11+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106792346/hunt-gb/regions/region-08.osm.pbf",
  "osm_snapshot": "",
  "run_id": "hunt-england-260905",
  "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": [
   "ST5565.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Dundry",
  "county": "North Somerset"
 }
}