{
 "ocl_version": "0.1.0",
 "name": "Mountain Road",
 "slug": "mountain-road-4",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.33642059548197,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1615.0,
   "end_distance_m": 1617.0,
   "start_elevation_m": 300.713848909174,
   "end_elevation_m": 301.4805773210836,
   "min_gradient_pct": -33.79752575484929
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.87431211860326,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1614.0,
   "end_distance_m": 1617.0,
   "start_elevation_m": 300.4343479575255,
   "end_elevation_m": 301.4805773210836,
   "min_gradient_pct": -31.031014254017464
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.016165414267334,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1560.0,
   "end_distance_m": 1565.0,
   "start_elevation_m": 292.25279464068996,
   "end_elevation_m": 293.9536029114033,
   "min_gradient_pct": -26.603426256339162
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.904142743544753,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1560.0,
   "end_distance_m": 1570.0,
   "start_elevation_m": 292.25279464068996,
   "end_elevation_m": 295.04320891504443,
   "min_gradient_pct": -20.47749555551661
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.484704241842337,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1553.0,
   "end_distance_m": 1573.0,
   "start_elevation_m": 291.24717926471493,
   "end_elevation_m": 295.7441201130834,
   "min_gradient_pct": -17.501431824266263
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.58162338757529,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1553.0,
   "end_distance_m": 1578.0,
   "start_elevation_m": 291.24717926471493,
   "end_elevation_m": 296.39258511160875,
   "min_gradient_pct": -16.988742444953914
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.6448368092216,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1536.0,
   "end_distance_m": 1586.0,
   "start_elevation_m": 288.9324866261767,
   "end_elevation_m": 297.2549050307875,
   "min_gradient_pct": -15.412686412667426
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.168698589969608,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1532.0,
   "end_distance_m": 1632.0,
   "start_elevation_m": 288.70335032198375,
   "end_elevation_m": 303.87204891195336,
   "min_gradient_pct": -12.772105140936617
  }
 ],
 "shape": {
  "ascent_concentration": 0.507,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 149.0,
  "shape_class": "stepped"
 },
 "length_m": 3461.486519611793,
 "start_elevation_m": 165.1700378181008,
 "end_elevation_m": 256.5482200634796,
 "endpoint_gain_m": 91.37818224537881,
 "overall_gradient_pct": 2.6398537659371533,
 "accumulated_ascent_m": 176.6482889293581,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.016165414267334,
   "start_distance_m": 1560.0,
   "end_distance_m": 1565.0,
   "midpoint_distance_m": 1562.5,
   "start_elevation_m": 292.25279464068996,
   "end_elevation_m": 293.9536029114033,
   "start_xy": [
    466108.3934673558,
    5026437.094511267
   ],
   "end_xy": [
    466104.10898893926,
    5026434.517156474
   ]
  },
  "max_10m": {
   "gradient_pct": 27.904142743544753,
   "start_distance_m": 1560.0,
   "end_distance_m": 1570.0,
   "midpoint_distance_m": 1565.0,
   "start_elevation_m": 292.25279464068996,
   "end_elevation_m": 295.04320891504443,
   "start_xy": [
    466108.3934673558,
    5026437.094511267
   ],
   "end_xy": [
    466099.728410981,
    5026432.1067031715
   ]
  },
  "max_20m": {
   "gradient_pct": 22.484704241842337,
   "start_distance_m": 1553.0,
   "end_distance_m": 1573.0,
   "midpoint_distance_m": 1563.0,
   "start_elevation_m": 291.24717926471493,
   "end_elevation_m": 295.7441201130834,
   "start_xy": [
    466114.3895802859,
    5026440.706522696
   ],
   "end_xy": [
    466097.09807697486,
    5026430.664017151
   ]
  },
  "max_25m": {
   "gradient_pct": 20.58162338757529,
   "start_distance_m": 1553.0,
   "end_distance_m": 1578.0,
   "midpoint_distance_m": 1565.5,
   "start_elevation_m": 291.24717926471493,
   "end_elevation_m": 296.39258511160875,
   "start_xy": [
    466114.3895802859,
    5026440.706522696
   ],
   "end_xy": [
    466092.7138998861,
    5026428.260064932
   ]
  },
  "max_50m": {
   "gradient_pct": 16.6448368092216,
   "start_distance_m": 1536.0,
   "end_distance_m": 1586.0,
   "midpoint_distance_m": 1561.0,
   "start_elevation_m": 288.9324866261767,
   "end_elevation_m": 297.2549050307875,
   "start_xy": [
    466128.95226691134,
    5026449.477390579
   ],
   "end_xy": [
    466085.6992777256,
    5026424.413630087
   ]
  },
  "max_100m": {
   "gradient_pct": 15.168698589969608,
   "start_distance_m": 1532.0,
   "end_distance_m": 1632.0,
   "midpoint_distance_m": 1582.0,
   "start_elevation_m": 288.70335032198375,
   "end_elevation_m": 303.87204891195336,
   "start_xy": [
    466132.3785518311,
    5026451.541505543
   ],
   "end_xy": [
    466045.1059866219,
    5026402.780525725
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -26.603426256339162,
   "start_distance_m": 1440.0,
   "end_distance_m": 1445.0,
   "midpoint_distance_m": 1442.5,
   "start_elevation_m": 288.9209783147412,
   "end_elevation_m": 287.59080700192425,
   "start_xy": [
    466208.50476110325,
    5026503.16850914
   ],
   "end_xy": [
    466204.24023198703,
    5026500.558185343
   ]
  },
  "min_10m": {
   "gradient_pct": -20.47749555551661,
   "start_distance_m": 1436.0,
   "end_distance_m": 1446.0,
   "midpoint_distance_m": 1441.0,
   "start_elevation_m": 289.56115861611954,
   "end_elevation_m": 287.5134090605679,
   "start_xy": [
    466211.91660245653,
    5026505.256412054
   ],
   "end_xy": [
    466203.38727164874,
    5026500.036209614
   ]
  },
  "min_20m": {
   "gradient_pct": -17.501431824266263,
   "start_distance_m": 2276.0,
   "end_distance_m": 2296.0,
   "midpoint_distance_m": 2286.0,
   "start_elevation_m": 286.28996899241065,
   "end_elevation_m": 282.7896826275574,
   "start_xy": [
    465723.27645487903,
    5025963.048548515
   ],
   "end_xy": [
    465726.89179700636,
    5025943.403489405
   ]
  },
  "min_25m": {
   "gradient_pct": -16.988742444953914,
   "start_distance_m": 2275.0,
   "end_distance_m": 2300.0,
   "midpoint_distance_m": 2287.5,
   "start_elevation_m": 286.4496581933181,
   "end_elevation_m": 282.2024725820796,
   "start_xy": [
    465723.0254580163,
    5025964.016536415
   ],
   "end_xy": [
    465727.47275429015,
    5025939.445903497
   ]
  },
  "min_50m": {
   "gradient_pct": -15.412686412667426,
   "start_distance_m": 2267.0,
   "end_distance_m": 2317.0,
   "midpoint_distance_m": 2292.0,
   "start_elevation_m": 287.55504122093873,
   "end_elevation_m": 279.848698014605,
   "start_xy": [
    465721.0184202341,
    5025971.760682125
   ],
   "end_xy": [
    465732.19124354474,
    5025923.202017214
   ]
  },
  "min_100m": {
   "gradient_pct": -12.772105140936617,
   "start_distance_m": 2247.0,
   "end_distance_m": 2347.0,
   "midpoint_distance_m": 2297.0,
   "start_elevation_m": 289.54364971895876,
   "end_elevation_m": 276.77154457802214,
   "start_xy": [
    465715.9994201011,
    5025991.120682638
   ],
   "end_xy": [
    465746.5361214704,
    5025897.092570261
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.33642059548197,
   "start_distance_m": 1615.0,
   "end_distance_m": 1617.0,
   "midpoint_distance_m": 1616.0,
   "start_elevation_m": 300.713848909174,
   "end_elevation_m": 301.4805773210836,
   "start_xy": [
    466060.1709108638,
    5026410.657579831
   ],
   "end_xy": [
    466058.3983867561,
    5026409.731211575
   ]
  },
  "max_3m": {
   "gradient_pct": 34.87431211860326,
   "start_distance_m": 1614.0,
   "end_distance_m": 1617.0,
   "midpoint_distance_m": 1615.5,
   "start_elevation_m": 300.4343479575255,
   "end_elevation_m": 301.4805773210836,
   "start_xy": [
    466061.0568200457,
    5026411.121438489
   ],
   "end_xy": [
    466058.3983867561,
    5026409.731211575
   ]
  }
 },
 "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": [],
  "suggested_summit_cut_m": 1818.0,
  "trailing_descent_m": 50.6
 },
 "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_x46y503_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-09-03T22:40:45+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": "canopy-tail-260903",
  "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": [
   "x46y503"
  ],
  "climb_origin": "discovered",
  "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": "Northeast Piscataquis",
  "county": "Maine"
 }
}