{
 "ocl_version": "0.1.0",
 "name": "Paine Road",
 "slug": "paine-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 49.10884478490836,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 94.0,
   "end_distance_m": 96.0,
   "start_elevation_m": 29.586899987538693,
   "end_elevation_m": 30.56907688323686,
   "min_gradient_pct": -12.285187261717212
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 46.770611207265965,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 94.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 29.586899987538693,
   "end_elevation_m": 30.990018323756672,
   "min_gradient_pct": -11.139047222747442
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 42.8068979722935,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 69.0,
   "end_distance_m": 74.0,
   "start_elevation_m": 23.58785316387709,
   "end_elevation_m": 25.728198062491764,
   "min_gradient_pct": -8.644157395122463
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 38.63957166100814,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 68.0,
   "end_distance_m": 78.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 27.075921298967646,
   "min_gradient_pct": -5.150328699548403
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.159090702433577,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 68.0,
   "end_distance_m": 88.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 28.643782273353548,
   "min_gradient_pct": -3.7920341071707675
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.494770557966817,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 68.0,
   "end_distance_m": 93.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 29.335656772358536,
   "min_gradient_pct": -3.022710422956436
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.256950143787435,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 68.0,
   "end_distance_m": 118.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 34.34043920476055,
   "min_gradient_pct": -1.58388531321188
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.488889383301107,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 68.0,
   "end_distance_m": 168.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 39.70085351616794,
   "min_gradient_pct": -0.34731315165751653
  }
 ],
 "shape": {
  "ascent_concentration": 0.495,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 77.0,
  "shape_class": "stepped"
 },
 "length_m": 550.9894017051932,
 "start_elevation_m": 18.940298638922965,
 "end_elevation_m": 55.30627959060655,
 "endpoint_gain_m": 36.36598095168358,
 "overall_gradient_pct": 6.6001234940524665,
 "accumulated_ascent_m": 39.285930806878746,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 42.8068979722935,
   "start_distance_m": 69.0,
   "end_distance_m": 74.0,
   "midpoint_distance_m": 71.5,
   "start_elevation_m": 23.58785316387709,
   "end_elevation_m": 25.728198062491764,
   "start_xy": [
    458338.7425709554,
    4881162.212610266
   ],
   "end_xy": [
    458343.169009236,
    4881159.887391104
   ]
  },
  "max_10m": {
   "gradient_pct": 38.63957166100814,
   "start_distance_m": 68.0,
   "end_distance_m": 78.0,
   "midpoint_distance_m": 73.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 27.075921298967646,
   "start_xy": [
    458337.8572832993,
    4881162.677654098
   ],
   "end_xy": [
    458346.7101598604,
    4881158.027215775
   ]
  },
  "max_20m": {
   "gradient_pct": 27.159090702433577,
   "start_distance_m": 68.0,
   "end_distance_m": 88.0,
   "midpoint_distance_m": 78.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 28.643782273353548,
   "start_xy": [
    458337.8572832993,
    4881162.677654098
   ],
   "end_xy": [
    458355.56303642143,
    4881153.376777452
   ]
  },
  "max_25m": {
   "gradient_pct": 24.494770557966817,
   "start_distance_m": 68.0,
   "end_distance_m": 93.0,
   "midpoint_distance_m": 80.5,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 29.335656772358536,
   "start_xy": [
    458337.8572832993,
    4881162.677654098
   ],
   "end_xy": [
    458359.9894747019,
    4881151.051558291
   ]
  },
  "max_50m": {
   "gradient_pct": 22.256950143787435,
   "start_distance_m": 68.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 93.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 34.34043920476055,
   "start_xy": [
    458337.8572832993,
    4881162.677654098
   ],
   "end_xy": [
    458382.12166610453,
    4881139.425462483
   ]
  },
  "max_100m": {
   "gradient_pct": 16.488889383301107,
   "start_distance_m": 68.0,
   "end_distance_m": 168.0,
   "midpoint_distance_m": 118.0,
   "start_elevation_m": 23.211964132866832,
   "end_elevation_m": 39.70085351616794,
   "start_xy": [
    458337.8572832993,
    4881162.677654098
   ],
   "end_xy": [
    458426.40799640206,
    4881116.215451311
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.644157395122463,
   "start_distance_m": 24.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 26.5,
   "start_elevation_m": 23.5973149749688,
   "end_elevation_m": 23.165107105212677,
   "start_xy": [
    458297.3375063224,
    4881177.596902308
   ],
   "end_xy": [
    458302.25493491004,
    4881177.514833698
   ]
  },
  "min_10m": {
   "gradient_pct": -5.150328699548403,
   "start_distance_m": 24.0,
   "end_distance_m": 34.0,
   "midpoint_distance_m": 29.0,
   "start_elevation_m": 23.5973149749688,
   "end_elevation_m": 23.08228210501396,
   "start_xy": [
    458297.3375063224,
    4881177.596902308
   ],
   "end_xy": [
    458307.201117411,
    4881176.783206288
   ]
  },
  "min_20m": {
   "gradient_pct": -3.7920341071707675,
   "start_distance_m": 24.0,
   "end_distance_m": 44.0,
   "midpoint_distance_m": 34.0,
   "start_elevation_m": 23.5973149749688,
   "end_elevation_m": 22.838908153534646,
   "start_xy": [
    458297.3375063224,
    4881177.596902308
   ],
   "end_xy": [
    458316.6103795528,
    4881173.838706073
   ]
  },
  "min_25m": {
   "gradient_pct": -3.022710422956436,
   "start_distance_m": 231.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 243.5,
   "start_elevation_m": 42.89828351055168,
   "end_elevation_m": 42.14260590481257,
   "start_xy": [
    458482.40851406514,
    4881087.354716368
   ],
   "end_xy": [
    458504.6309417092,
    4881075.902043772
   ]
  },
  "min_50m": {
   "gradient_pct": -1.58388531321188,
   "start_distance_m": 308.0,
   "end_distance_m": 358.0,
   "midpoint_distance_m": 333.0,
   "start_elevation_m": 48.633922108149314,
   "end_elevation_m": 47.841979451543374,
   "start_xy": [
    458550.85359120887,
    4881052.080484771
   ],
   "end_xy": [
    458553.5625508053,
    4881101.771214308
   ]
  },
  "min_100m": {
   "gradient_pct": -0.34731315165751653,
   "start_distance_m": 303.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 353.0,
   "start_elevation_m": 48.62117283099329,
   "end_elevation_m": 48.27385967933577,
   "start_xy": [
    458546.40910568007,
    4881054.37101929
   ],
   "end_xy": [
    458558.37665998377,
    4881146.436854793
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 49.10884478490836,
   "start_distance_m": 94.0,
   "end_distance_m": 96.0,
   "midpoint_distance_m": 95.0,
   "start_elevation_m": 29.586899987538693,
   "end_elevation_m": 30.56907688323686,
   "start_xy": [
    458360.874762358,
    4881150.586514459
   ],
   "end_xy": [
    458362.6453376702,
    4881149.656426794
   ]
  },
  "max_3m": {
   "gradient_pct": 46.770611207265965,
   "start_distance_m": 94.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 95.5,
   "start_elevation_m": 29.586899987538693,
   "end_elevation_m": 30.990018323756672,
   "start_xy": [
    458360.874762358,
    4881150.586514459
   ],
   "end_xy": [
    458363.5306253263,
    4881149.191382961
   ]
  }
 },
 "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": {
  "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/me/USGS_1M_19_x45y489_ME_SouthCoastal_2020_A20.tif"
  ],
  "calculated_at": "2026-08-24T20:58:44+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/maine-2026-08-22.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-me-2-260824",
  "elevation_provider": "USGS 3DEP (The National Map)",
  "elevation_licence": "Public domain \u2014 USGS 3DEP 1 m DEM, courtesy of the U.S. Geological Survey",
  "elevation_dataset": "USGS 3DEP 1 m DEM, ME_SouthCoastal_2020_A20 (collected 2020)",
  "elevation_tile_ids": [
   "x45y489"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.2% over 200 m (Terrain 50), gain 30.1 m over 308 m way. EXTENDED by graph walk: +0 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Nobleboro",
  "county": "Maine"
 }
}