{
 "ocl_version": "0.1.0",
 "name": "Greenway Lane",
 "slug": "greenway-lane-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 31.624107000810397,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 148.0,
   "end_distance_m": 150.0,
   "start_elevation_m": 137.1469319540909,
   "end_elevation_m": 137.7794140941071,
   "min_gradient_pct": -7.579617502668157
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.384235604991698,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 148.0,
   "end_distance_m": 151.0,
   "start_elevation_m": 137.1469319540909,
   "end_elevation_m": 138.02845902224064,
   "min_gradient_pct": -6.190938780844135
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.450169656891944,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 202.0,
   "end_distance_m": 207.0,
   "start_elevation_m": 148.34441677754623,
   "end_elevation_m": 149.66692526039083,
   "min_gradient_pct": -5.032743870252716
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.42684532242623,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 27.0,
   "end_distance_m": 37.0,
   "start_elevation_m": 113.66684882480205,
   "end_elevation_m": 116.10953335704467,
   "min_gradient_pct": -4.869998158549436
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.805540829419414,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 26.0,
   "end_distance_m": 46.0,
   "start_elevation_m": 113.44478273270704,
   "end_elevation_m": 118.20589089859092,
   "min_gradient_pct": -4.479817559996349
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.17681099888796,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 23.0,
   "end_distance_m": 48.0,
   "start_elevation_m": 112.84755731912804,
   "end_elevation_m": 118.64176006885003,
   "min_gradient_pct": -4.478977581503727
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.114785964570448,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 24.0,
   "end_distance_m": 74.0,
   "start_elevation_m": 113.0447056182748,
   "end_elevation_m": 124.10209860056003,
   "min_gradient_pct": -4.1536218190178715
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.83352710780288,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 16.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 111.53323888220395,
   "end_elevation_m": 132.36676599000683,
   "min_gradient_pct": -3.218844384027335
  }
 ],
 "shape": {
  "ascent_concentration": 0.474,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 280.0,
  "shape_class": "stepped"
 },
 "length_m": 1031.468758706778,
 "start_elevation_m": 109.50722794179002,
 "end_elevation_m": 206.6301888088989,
 "endpoint_gain_m": 97.12296086710889,
 "overall_gradient_pct": 9.415986674078088,
 "accumulated_ascent_m": 100.97838989250697,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.450169656891944,
   "start_distance_m": 202.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 204.5,
   "start_elevation_m": 148.34441677754623,
   "end_elevation_m": 149.66692526039083,
   "start_xy": [
    373788.2811368139,
    171775.62930701522
   ],
   "end_xy": [
    373789.5098916177,
    171780.47597201623
   ]
  },
  "max_10m": {
   "gradient_pct": 24.42684532242623,
   "start_distance_m": 27.0,
   "end_distance_m": 37.0,
   "midpoint_distance_m": 32.0,
   "start_elevation_m": 113.66684882480205,
   "end_elevation_m": 116.10953335704467,
   "start_xy": [
    373713.48095855064,
    171623.37979811127
   ],
   "end_xy": [
    373719.45589010924,
    171631.37644108816
   ]
  },
  "max_20m": {
   "gradient_pct": 23.805540829419414,
   "start_distance_m": 26.0,
   "end_distance_m": 46.0,
   "midpoint_distance_m": 36.0,
   "start_elevation_m": 113.44478273270704,
   "end_elevation_m": 118.20589089859092,
   "start_xy": [
    373712.9274718438,
    171622.54694010096
   ],
   "end_xy": [
    373725.2946338328,
    171638.22546085235
   ]
  },
  "max_25m": {
   "gradient_pct": 23.17681099888796,
   "start_distance_m": 23.0,
   "end_distance_m": 48.0,
   "midpoint_distance_m": 35.5,
   "start_elevation_m": 112.84755731912804,
   "end_elevation_m": 118.64176006885003,
   "start_xy": [
    373711.2670117232,
    171620.04836607003
   ],
   "end_xy": [
    373726.2262718011,
    171639.9895498539
   ]
  },
  "max_50m": {
   "gradient_pct": 22.114785964570448,
   "start_distance_m": 24.0,
   "end_distance_m": 74.0,
   "midpoint_distance_m": 49.0,
   "start_elevation_m": 113.0447056182748,
   "end_elevation_m": 124.10209860056003,
   "start_xy": [
    373711.82049843005,
    171620.88122408034
   ],
   "end_xy": [
    373736.0375098281,
    171663.99246512167
   ]
  },
  "max_100m": {
   "gradient_pct": 20.83352710780288,
   "start_distance_m": 16.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 66.0,
   "start_elevation_m": 111.53323888220395,
   "end_elevation_m": 132.36676599000683,
   "start_xy": [
    373707.39260477526,
    171614.21835999785
   ],
   "end_xy": [
    373754.8777146561,
    171700.25568773082
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.032743870252716,
   "start_distance_m": 831.0,
   "end_distance_m": 836.0,
   "midpoint_distance_m": 833.5,
   "start_elevation_m": 204.0299405633907,
   "end_elevation_m": 203.77830336987807,
   "start_xy": [
    374061.72900251485,
    172304.07092257566
   ],
   "end_xy": [
    374065.7791751809,
    172307.00283345
   ]
  },
  "min_10m": {
   "gradient_pct": -4.869998158549436,
   "start_distance_m": 826.0,
   "end_distance_m": 836.0,
   "midpoint_distance_m": 831.0,
   "start_elevation_m": 204.26530318573302,
   "end_elevation_m": 203.77830336987807,
   "start_xy": [
    374057.6788298488,
    172301.1390117013
   ],
   "end_xy": [
    374065.7791751809,
    172307.00283345
   ]
  },
  "min_20m": {
   "gradient_pct": -4.479817559996349,
   "start_distance_m": 833.0,
   "end_distance_m": 853.0,
   "midpoint_distance_m": 843.0,
   "start_elevation_m": 203.9640315333034,
   "end_elevation_m": 203.06806802130413,
   "start_xy": [
    374063.34907158127,
    172305.24368692542
   ],
   "end_xy": [
    374079.68804522016,
    172316.7733651002
   ]
  },
  "min_25m": {
   "gradient_pct": -4.478977581503727,
   "start_distance_m": 828.0,
   "end_distance_m": 853.0,
   "midpoint_distance_m": 840.5,
   "start_elevation_m": 204.18781241668006,
   "end_elevation_m": 203.06806802130413,
   "start_xy": [
    374059.29889891524,
    172302.31177605104
   ],
   "end_xy": [
    374079.68804522016,
    172316.7733651002
   ]
  },
  "min_50m": {
   "gradient_pct": -4.1536218190178715,
   "start_distance_m": 824.0,
   "end_distance_m": 874.0,
   "midpoint_distance_m": 849.0,
   "start_elevation_m": 204.31601947874668,
   "end_elevation_m": 202.23920856923775,
   "start_xy": [
    374056.0587607824,
    172299.96624735155
   ],
   "end_xy": [
    374097.10407538747,
    172328.50715788908
   ]
  },
  "min_100m": {
   "gradient_pct": -3.218844384027335,
   "start_distance_m": 786.0,
   "end_distance_m": 886.0,
   "midpoint_distance_m": 836.0,
   "start_elevation_m": 205.2483350919059,
   "end_elevation_m": 202.02949070787855,
   "start_xy": [
    374025.5166473924,
    172277.37161679158
   ],
   "end_xy": [
    374107.0560926259,
    172335.21218233986
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 31.624107000810397,
   "start_distance_m": 148.0,
   "end_distance_m": 150.0,
   "midpoint_distance_m": 149.0,
   "start_elevation_m": 137.1469319540909,
   "end_elevation_m": 137.7794140941071,
   "start_xy": [
    373775.5441765294,
    171723.1533439437
   ],
   "end_xy": [
    373776.01309389004,
    171725.09759611584
   ]
  },
  "max_3m": {
   "gradient_pct": 29.384235604991698,
   "start_distance_m": 148.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 149.5,
   "start_elevation_m": 137.1469319540909,
   "end_elevation_m": 138.02845902224064,
   "start_xy": [
    373775.5441765294,
    171723.1533439437
   ],
   "end_xy": [
    373776.24755257036,
    171726.0697222019
   ]
  }
 },
 "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": 0.021,
   "obstruction_max_height_m": 8.99,
   "flagged_windows_m": [
    5
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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/ST7070.tif"
  ],
  "calculated_at": "2026-09-05T02:40:51+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": [
   "ST7070.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Nimlet",
  "county": "South Gloucestershire"
 }
}