{
 "ocl_version": "0.1.0",
 "name": "Merry Lane",
 "slug": "merry-lane",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.56703565736558,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 155.0,
   "end_distance_m": 157.0,
   "start_elevation_m": 146.04648513609354,
   "end_elevation_m": 146.59782584924085,
   "min_gradient_pct": -2.7979571127517033
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.19936761445744,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 154.0,
   "end_distance_m": 157.0,
   "start_elevation_m": 145.84184482080713,
   "end_elevation_m": 146.59782584924085,
   "min_gradient_pct": -2.3222724868560363
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.672253702965236,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 84.0,
   "end_distance_m": 89.0,
   "start_elevation_m": 132.1669115949967,
   "end_elevation_m": 133.35052428014495,
   "min_gradient_pct": -1.8857621111135359
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.063650140833545,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 95.0,
   "end_distance_m": 105.0,
   "start_elevation_m": 134.63660200145273,
   "end_elevation_m": 136.94296701553608,
   "min_gradient_pct": -1.0004200368612715
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.814128018592044,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 83.0,
   "end_distance_m": 103.0,
   "start_elevation_m": 131.9340554090488,
   "end_elevation_m": 136.4968810127672,
   "min_gradient_pct": -0.4169430425803
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.621904831285974,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 82.0,
   "end_distance_m": 107.0,
   "start_elevation_m": 131.71430623325753,
   "end_elevation_m": 137.36978244107902,
   "min_gradient_pct": -0.08768278050979461
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.266434553701373,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 58.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 126.93835000756069,
   "end_elevation_m": 137.57156728441137,
   "min_gradient_pct": 0.26502435512804823
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.092386708688608,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 40.0,
   "end_distance_m": 140.0,
   "start_elevation_m": 123.59168282626639,
   "end_elevation_m": 143.684069534955,
   "min_gradient_pct": 1.036577181314584
  }
 ],
 "shape": {
  "ascent_concentration": 0.541,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 158.0,
  "shape_class": "stepped"
 },
 "length_m": 856.5161415063994,
 "start_elevation_m": 119.86713070984091,
 "end_elevation_m": 182.6337896332982,
 "endpoint_gain_m": 62.766658923457285,
 "overall_gradient_pct": 7.328134973973323,
 "accumulated_ascent_m": 63.30553436807659,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.672253702965236,
   "start_distance_m": 84.0,
   "end_distance_m": 89.0,
   "midpoint_distance_m": 86.5,
   "start_elevation_m": 132.1669115949967,
   "end_elevation_m": 133.35052428014495,
   "start_xy": [
    373119.396589535,
    4886574.507979494
   ],
   "end_xy": [
    373120.6823319292,
    4886569.6761199655
   ]
  },
  "max_10m": {
   "gradient_pct": 23.063650140833545,
   "start_distance_m": 95.0,
   "end_distance_m": 105.0,
   "midpoint_distance_m": 100.0,
   "start_elevation_m": 134.63660200145273,
   "end_elevation_m": 136.94296701553608,
   "start_xy": [
    373122.22522280226,
    4886563.877888532
   ],
   "end_xy": [
    373124.79670759063,
    4886554.214169477
   ]
  },
  "max_20m": {
   "gradient_pct": 22.814128018592044,
   "start_distance_m": 83.0,
   "end_distance_m": 103.0,
   "midpoint_distance_m": 93.0,
   "start_elevation_m": 131.9340554090488,
   "end_elevation_m": 136.4968810127672,
   "start_xy": [
    373119.1394410562,
    4886575.4743514
   ],
   "end_xy": [
    373124.28241063294,
    4886556.146913288
   ]
  },
  "max_25m": {
   "gradient_pct": 22.621904831285974,
   "start_distance_m": 82.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 94.5,
   "start_elevation_m": 131.71430623325753,
   "end_elevation_m": 137.36978244107902,
   "start_xy": [
    373118.88229257736,
    4886576.440723305
   ],
   "end_xy": [
    373125.3110045483,
    4886552.281425666
   ]
  },
  "max_50m": {
   "gradient_pct": 21.266434553701373,
   "start_distance_m": 58.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 83.0,
   "start_elevation_m": 126.93835000756069,
   "end_elevation_m": 137.57156728441137,
   "start_xy": [
    373111.68599327444,
    4886599.325119005
   ],
   "end_xy": [
    373125.5681530271,
    4886551.31505376
   ]
  },
  "max_100m": {
   "gradient_pct": 20.092386708688608,
   "start_distance_m": 40.0,
   "end_distance_m": 140.0,
   "midpoint_distance_m": 90.0,
   "start_elevation_m": 123.59168282626639,
   "end_elevation_m": 143.684069534955,
   "start_xy": [
    373105.94135259493,
    4886616.383814836
   ],
   "end_xy": [
    373138.5560603345,
    4886522.591334715
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.8857621111135359,
   "start_distance_m": 464.0,
   "end_distance_m": 469.0,
   "midpoint_distance_m": 466.5,
   "start_elevation_m": 167.87548220373034,
   "end_elevation_m": 167.78119409817467,
   "start_xy": [
    373427.1318193274,
    4886635.857086787
   ],
   "end_xy": [
    373431.09474713646,
    4886638.905890352
   ]
  },
  "min_10m": {
   "gradient_pct": -1.0004200368612715,
   "start_distance_m": 466.0,
   "end_distance_m": 476.0,
   "midpoint_distance_m": 471.0,
   "start_elevation_m": 167.84585369206312,
   "end_elevation_m": 167.745811688377,
   "start_xy": [
    373428.71699045104,
    4886637.076608213
   ],
   "end_xy": [
    373436.64284606907,
    4886643.174215344
   ]
  },
  "min_20m": {
   "gradient_pct": -0.4169430425803,
   "start_distance_m": 463.0,
   "end_distance_m": 483.0,
   "midpoint_distance_m": 473.0,
   "start_elevation_m": 167.87727959798556,
   "end_elevation_m": 167.7938909894695,
   "start_xy": [
    373426.3392337656,
    4886635.247326074
   ],
   "end_xy": [
    373442.19094500167,
    4886647.4425403355
   ]
  },
  "min_25m": {
   "gradient_pct": -0.08768278050979461,
   "start_distance_m": 454.0,
   "end_distance_m": 479.0,
   "midpoint_distance_m": 466.5,
   "start_elevation_m": 167.7635695495345,
   "end_elevation_m": 167.74164885440706,
   "start_xy": [
    373418.8424903799,
    4886630.317291173
   ],
   "end_xy": [
    373439.0206027545,
    4886645.003497483
   ]
  },
  "min_50m": {
   "gradient_pct": 0.26502435512804823,
   "start_distance_m": 510.0,
   "end_distance_m": 560.0,
   "midpoint_distance_m": 535.0,
   "start_elevation_m": 168.7504797306606,
   "end_elevation_m": 168.88299190822462,
   "start_xy": [
    373463.5907551703,
    4886663.906079588
   ],
   "end_xy": [
    373497.51331106585,
    4886700.609039922
   ]
  },
  "min_100m": {
   "gradient_pct": 1.036577181314584,
   "start_distance_m": 453.0,
   "end_distance_m": 553.0,
   "midpoint_distance_m": 503.0,
   "start_elevation_m": 167.74802380807554,
   "end_elevation_m": 168.78460098939013,
   "start_xy": [
    373417.9645475987,
    4886629.838525602
   ],
   "end_xy": [
    373492.7883138839,
    4886695.444313247
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.56703565736558,
   "start_distance_m": 155.0,
   "end_distance_m": 157.0,
   "midpoint_distance_m": 156.0,
   "start_elevation_m": 146.04648513609354,
   "end_elevation_m": 146.59782584924085,
   "start_xy": [
    373151.7088029889,
    4886517.924354237
   ],
   "end_xy": [
    373153.6948251495,
    4886517.688311915
   ]
  },
  "max_3m": {
   "gradient_pct": 25.19936761445744,
   "start_distance_m": 154.0,
   "end_distance_m": 157.0,
   "midpoint_distance_m": 155.5,
   "start_elevation_m": 145.84184482080713,
   "end_elevation_m": 146.59782584924085,
   "start_xy": [
    373150.7157919086,
    4886518.042375398
   ],
   "end_xy": [
    373153.6948251495,
    4886517.688311915
   ]
  }
 },
 "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_x37y489_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-08-24T20:39:03+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-1-260824",
  "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": [
   "x37y489"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 16.1% over 200 m (Terrain 50), gain 62.6 m over 857 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). 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": "Otisfield",
  "county": "Maine"
 }
}