{
 "ocl_version": "0.1.0",
 "name": "Green Acres Road",
 "slug": "green-acres-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 35.72932486663092,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2201.0,
   "end_distance_m": 2203.0,
   "start_elevation_m": 215.0158013614495,
   "end_elevation_m": 215.7303878587821,
   "min_gradient_pct": -38.02629358497143
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.00569415305582,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2201.0,
   "end_distance_m": 2204.0,
   "start_elevation_m": 215.0158013614495,
   "end_elevation_m": 216.06597218604117,
   "min_gradient_pct": -34.87201505460765
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.85292366122428,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2200.0,
   "end_distance_m": 2205.0,
   "start_elevation_m": 214.69176499456958,
   "end_elevation_m": 216.3844111776308,
   "min_gradient_pct": -29.63972319129539
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 32.44540810840249,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2195.0,
   "end_distance_m": 2205.0,
   "start_elevation_m": 213.13987036679055,
   "end_elevation_m": 216.3844111776308,
   "min_gradient_pct": -19.969098191873513
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 29.481491296644293,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2189.0,
   "end_distance_m": 2209.0,
   "start_elevation_m": 211.6544208731999,
   "end_elevation_m": 217.55071913252877,
   "min_gradient_pct": -13.377627035017952
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 27.50163966054231,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2186.0,
   "end_distance_m": 2211.0,
   "start_elevation_m": 211.12554038371445,
   "end_elevation_m": 218.00095029885003,
   "min_gradient_pct": -10.947997049962396
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.358871349354445,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2188.0,
   "end_distance_m": 2238.0,
   "start_elevation_m": 211.4154733021192,
   "end_elevation_m": 224.09490897679643,
   "min_gradient_pct": -7.919659685761474
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.237306954838058,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2188.0,
   "end_distance_m": 2288.0,
   "start_elevation_m": 211.4154733021192,
   "end_elevation_m": 233.65278025695727,
   "min_gradient_pct": -6.172610114326915
  }
 ],
 "shape": {
  "ascent_concentration": 0.571,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 284.0,
  "shape_class": "stepped"
 },
 "length_m": 2815.138402930565,
 "start_elevation_m": 125.14904457030909,
 "end_elevation_m": 274.7790075060946,
 "endpoint_gain_m": 149.62996293578553,
 "overall_gradient_pct": 5.315190286204771,
 "accumulated_ascent_m": 179.46465718839613,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.85292366122428,
   "start_distance_m": 2200.0,
   "end_distance_m": 2205.0,
   "midpoint_distance_m": 2202.5,
   "start_elevation_m": 214.69176499456958,
   "end_elevation_m": 216.3844111776308,
   "start_xy": [
    392021.04494305997,
    4921370.483883522
   ],
   "end_xy": [
    392017.25334581325,
    4921373.743299164
   ]
  },
  "max_10m": {
   "gradient_pct": 32.44540810840249,
   "start_distance_m": 2195.0,
   "end_distance_m": 2205.0,
   "midpoint_distance_m": 2200.0,
   "start_elevation_m": 213.13987036679055,
   "end_elevation_m": 216.3844111776308,
   "start_xy": [
    392024.8365403067,
    4921367.224467882
   ],
   "end_xy": [
    392017.25334581325,
    4921373.743299164
   ]
  },
  "max_20m": {
   "gradient_pct": 29.481491296644293,
   "start_distance_m": 2189.0,
   "end_distance_m": 2209.0,
   "midpoint_distance_m": 2199.0,
   "start_elevation_m": 211.6544208731999,
   "end_elevation_m": 217.55071913252877,
   "start_xy": [
    392029.3864570027,
    4921363.313169113
   ],
   "end_xy": [
    392014.22006801586,
    4921376.350831676
   ]
  },
  "max_25m": {
   "gradient_pct": 27.50163966054231,
   "start_distance_m": 2186.0,
   "end_distance_m": 2211.0,
   "midpoint_distance_m": 2198.5,
   "start_elevation_m": 211.12554038371445,
   "end_elevation_m": 218.00095029885003,
   "start_xy": [
    392031.66141535074,
    4921361.357519729
   ],
   "end_xy": [
    392012.70342911716,
    4921377.6545979325
   ]
  },
  "max_50m": {
   "gradient_pct": 25.358871349354445,
   "start_distance_m": 2188.0,
   "end_distance_m": 2238.0,
   "midpoint_distance_m": 2213.0,
   "start_elevation_m": 211.4154733021192,
   "end_elevation_m": 224.09490897679643,
   "start_xy": [
    392030.14477645204,
    4921362.661285985
   ],
   "end_xy": [
    391992.22880398494,
    4921395.255442392
   ]
  },
  "max_100m": {
   "gradient_pct": 22.237306954838058,
   "start_distance_m": 2188.0,
   "end_distance_m": 2288.0,
   "midpoint_distance_m": 2238.0,
   "start_elevation_m": 211.4154733021192,
   "end_elevation_m": 233.65278025695727,
   "start_xy": [
    392030.14477645204,
    4921362.661285985
   ],
   "end_xy": [
    391959.73149664234,
    4921433.104963016
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -29.63972319129539,
   "start_distance_m": 2727.0,
   "end_distance_m": 2732.0,
   "midpoint_distance_m": 2729.5,
   "start_elevation_m": 274.82558825207167,
   "end_elevation_m": 273.3436020925069,
   "start_xy": [
    391681.7482460044,
    4921771.582266053
   ],
   "end_xy": [
    391678.1609762161,
    4921775.065295692
   ]
  },
  "min_10m": {
   "gradient_pct": -19.969098191873513,
   "start_distance_m": 2726.0,
   "end_distance_m": 2736.0,
   "midpoint_distance_m": 2731.0,
   "start_elevation_m": 274.9225512984559,
   "end_elevation_m": 272.92564147926856,
   "start_xy": [
    391682.46569996205,
    4921770.885660125
   ],
   "end_xy": [
    391675.2911603854,
    4921777.851719403
   ]
  },
  "min_20m": {
   "gradient_pct": -13.377627035017952,
   "start_distance_m": 2726.0,
   "end_distance_m": 2746.0,
   "midpoint_distance_m": 2736.0,
   "start_elevation_m": 274.9225512984559,
   "end_elevation_m": 272.2470258914523,
   "start_xy": [
    391682.46569996205,
    4921770.885660125
   ],
   "end_xy": [
    391668.11662080884,
    4921784.8177786805
   ]
  },
  "min_25m": {
   "gradient_pct": -10.947997049962396,
   "start_distance_m": 2722.0,
   "end_distance_m": 2747.0,
   "midpoint_distance_m": 2734.5,
   "start_elevation_m": 274.9665447397279,
   "end_elevation_m": 272.2295454772373,
   "start_xy": [
    391685.33551579266,
    4921768.099236414
   ],
   "end_xy": [
    391667.3991668512,
    4921785.514384609
   ]
  },
  "min_50m": {
   "gradient_pct": -7.919659685761474,
   "start_distance_m": 1791.0,
   "end_distance_m": 1841.0,
   "midpoint_distance_m": 1816.0,
   "start_elevation_m": 180.99754640634876,
   "end_elevation_m": 177.03771656346802,
   "start_xy": [
    392361.4770317731,
    4921147.210533139
   ],
   "end_xy": [
    392317.49807824724,
    4921170.983135233
   ]
  },
  "min_100m": {
   "gradient_pct": -6.172610114326915,
   "start_distance_m": 1744.0,
   "end_distance_m": 1844.0,
   "midpoint_distance_m": 1794.0,
   "start_elevation_m": 182.86493069235877,
   "end_elevation_m": 176.69232057803185,
   "start_xy": [
    392403.17841874866,
    4921125.531180651
   ],
   "end_xy": [
    392314.88466359244,
    4921172.456248889
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 35.72932486663092,
   "start_distance_m": 2201.0,
   "end_distance_m": 2203.0,
   "midpoint_distance_m": 2202.0,
   "start_elevation_m": 215.0158013614495,
   "end_elevation_m": 215.7303878587821,
   "start_xy": [
    392020.2866236106,
    4921371.1357666515
   ],
   "end_xy": [
    392018.7699847119,
    4921372.439532908
   ]
  },
  "max_3m": {
   "gradient_pct": 35.00569415305582,
   "start_distance_m": 2201.0,
   "end_distance_m": 2204.0,
   "midpoint_distance_m": 2202.5,
   "start_elevation_m": 215.0158013614495,
   "end_elevation_m": 216.06597218604117,
   "start_xy": [
    392020.2866236106,
    4921371.1357666515
   ],
   "end_xy": [
    392018.0116652626,
    4921373.091416036
   ]
  }
 },
 "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_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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/me/USGS_1M_19_x39y493_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-08-24T21:02:08+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-5-260824",
  "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_WesternMtns_B24 (collected 2024)",
  "elevation_tile_ids": [
   "x39y493"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 8.1% over 200 m (Terrain 50), gain 40.1 m over 1491 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): discovered-lane-44-4392-70-3588 ADOPTED (NE wave 1, 2026-08-25): clean-steep,qualified-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": "Hartford",
  "county": "Maine"
 }
}