{
 "ocl_version": "0.1.0",
 "name": "East Mountain Road",
 "slug": "east-mountain-road-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 17.884308508160984,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2174.0,
   "end_distance_m": 2176.0,
   "start_elevation_m": 545.8697141236481,
   "end_elevation_m": 546.2274002938113,
   "min_gradient_pct": -12.68901982070929
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 17.598383798402512,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2173.0,
   "end_distance_m": 2176.0,
   "start_elevation_m": 545.6994487798593,
   "end_elevation_m": 546.2274002938113,
   "min_gradient_pct": -12.499936759225724
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 17.205627634812117,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2173.0,
   "end_distance_m": 2178.0,
   "start_elevation_m": 545.6994487798593,
   "end_elevation_m": 546.5597301615999,
   "min_gradient_pct": -12.509451988426008
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 16.954096927958062,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2168.0,
   "end_distance_m": 2178.0,
   "start_elevation_m": 544.8643204688041,
   "end_elevation_m": 546.5597301615999,
   "min_gradient_pct": -12.399644702566093
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 16.48038171043254,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2167.0,
   "end_distance_m": 2187.0,
   "start_elevation_m": 544.707049413201,
   "end_elevation_m": 548.0031257552876,
   "min_gradient_pct": -12.245116352605692
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 16.19636468205408,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2165.0,
   "end_distance_m": 2190.0,
   "start_elevation_m": 544.4160433898653,
   "end_elevation_m": 548.4651345603788,
   "min_gradient_pct": -12.17022392070976
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.729232352443205,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2148.0,
   "end_distance_m": 2198.0,
   "start_elevation_m": 542.1117604605444,
   "end_elevation_m": 549.476376636766,
   "min_gradient_pct": -11.550556129487632
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.890680608721311,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1494.0,
   "end_distance_m": 1594.0,
   "start_elevation_m": 472.2270837687932,
   "end_elevation_m": 486.1177643775145,
   "min_gradient_pct": -10.637210424135105
  }
 ],
 "shape": {
  "ascent_concentration": 0.459,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 293.0,
  "shape_class": "stepped"
 },
 "length_m": 6933.970673889723,
 "start_elevation_m": 352.3290334448169,
 "end_elevation_m": 673.6572858582792,
 "endpoint_gain_m": 321.32825241346234,
 "overall_gradient_pct": 4.634116115077367,
 "accumulated_ascent_m": 403.24294311047197,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 17.205627634812117,
   "start_distance_m": 2173.0,
   "end_distance_m": 2178.0,
   "midpoint_distance_m": 2175.5,
   "start_elevation_m": 545.6994487798593,
   "end_elevation_m": 546.5597301615999,
   "start_xy": [
    680250.9709481783,
    4831103.390643489
   ],
   "end_xy": [
    680246.4259938357,
    4831105.474723627
   ]
  },
  "max_10m": {
   "gradient_pct": 16.954096927958062,
   "start_distance_m": 2168.0,
   "end_distance_m": 2178.0,
   "midpoint_distance_m": 2173.0,
   "start_elevation_m": 544.8643204688041,
   "end_elevation_m": 546.5597301615999,
   "start_xy": [
    680255.5159025211,
    4831101.30656335
   ],
   "end_xy": [
    680246.4259938357,
    4831105.474723627
   ]
  },
  "max_20m": {
   "gradient_pct": 16.48038171043254,
   "start_distance_m": 2167.0,
   "end_distance_m": 2187.0,
   "midpoint_distance_m": 2177.0,
   "start_elevation_m": 544.707049413201,
   "end_elevation_m": 548.0031257552876,
   "start_xy": [
    680256.4248933896,
    4831100.889747323
   ],
   "end_xy": [
    680239.3247462824,
    4831110.977681447
   ]
  },
  "max_25m": {
   "gradient_pct": 16.19636468205408,
   "start_distance_m": 2165.0,
   "end_distance_m": 2190.0,
   "midpoint_distance_m": 2177.5,
   "start_elevation_m": 544.4160433898653,
   "end_elevation_m": 548.4651345603788,
   "start_xy": [
    680258.2962450641,
    4831100.201907166
   ],
   "end_xy": [
    680236.9822924782,
    4831112.851957354
   ]
  },
  "max_50m": {
   "gradient_pct": 14.729232352443205,
   "start_distance_m": 2148.0,
   "end_distance_m": 2198.0,
   "midpoint_distance_m": 2173.0,
   "start_elevation_m": 542.1117604605444,
   "end_elevation_m": 549.476376636766,
   "start_xy": [
    680274.6717213397,
    4831095.636408645
   ],
   "end_xy": [
    680231.860944748,
    4831118.931363946
   ]
  },
  "max_100m": {
   "gradient_pct": 13.890680608721311,
   "start_distance_m": 1494.0,
   "end_distance_m": 1594.0,
   "midpoint_distance_m": 1544.0,
   "start_elevation_m": 472.2270837687932,
   "end_elevation_m": 486.1177643775145,
   "start_xy": [
    680732.5096445191,
    4830993.622551728
   ],
   "end_xy": [
    680678.3430338831,
    4831077.662298012
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.509451988426008,
   "start_distance_m": 5350.0,
   "end_distance_m": 5355.0,
   "midpoint_distance_m": 5352.5,
   "start_elevation_m": 648.4531710918578,
   "end_elevation_m": 647.8276984924365,
   "start_xy": [
    678895.0531511728,
    4833144.545153771
   ],
   "end_xy": [
    678890.5643586876,
    4833142.342713755
   ]
  },
  "min_10m": {
   "gradient_pct": -12.399644702566093,
   "start_distance_m": 5345.0,
   "end_distance_m": 5355.0,
   "midpoint_distance_m": 5350.0,
   "start_elevation_m": 649.0676629626931,
   "end_elevation_m": 647.8276984924365,
   "start_xy": [
    678899.5419436579,
    4833146.7475937875
   ],
   "end_xy": [
    678890.5643586876,
    4833142.342713755
   ]
  },
  "min_20m": {
   "gradient_pct": -12.245116352605692,
   "start_distance_m": 5339.0,
   "end_distance_m": 5359.0,
   "midpoint_distance_m": 5349.0,
   "start_elevation_m": 649.7935000629827,
   "end_elevation_m": 647.3444767924616,
   "start_xy": [
    678904.9284946402,
    4833149.390521807
   ],
   "end_xy": [
    678886.9733246996,
    4833140.580761742
   ]
  },
  "min_25m": {
   "gradient_pct": -12.17022392070976,
   "start_distance_m": 5338.0,
   "end_distance_m": 5363.0,
   "midpoint_distance_m": 5350.5,
   "start_elevation_m": 649.9095939803442,
   "end_elevation_m": 646.8670380001668,
   "start_xy": [
    678905.8262531372,
    4833149.83100981
   ],
   "end_xy": [
    678883.3822907114,
    4833138.818809729
   ]
  },
  "min_50m": {
   "gradient_pct": -11.550556129487632,
   "start_distance_m": 5328.0,
   "end_distance_m": 5378.0,
   "midpoint_distance_m": 5353.0,
   "start_elevation_m": 651.001094932948,
   "end_elevation_m": 645.2258168682042,
   "start_xy": [
    678914.6766582148,
    4833154.466423932
   ],
   "end_xy": [
    678870.0960059781,
    4833131.881756197
   ]
  },
  "min_100m": {
   "gradient_pct": -10.637210424135105,
   "start_distance_m": 5328.0,
   "end_distance_m": 5428.0,
   "midpoint_distance_m": 5378.0,
   "start_elevation_m": 651.001094932948,
   "end_elevation_m": 640.3638845088129,
   "start_xy": [
    678914.6766582148,
    4833154.466423932
   ],
   "end_xy": [
    678828.4208116706,
    4833104.287037975
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 17.884308508160984,
   "start_distance_m": 2174.0,
   "end_distance_m": 2176.0,
   "midpoint_distance_m": 2175.0,
   "start_elevation_m": 545.8697141236481,
   "end_elevation_m": 546.2274002938113,
   "start_xy": [
    680250.0619573098,
    4831103.807459516
   ],
   "end_xy": [
    680248.2439755728,
    4831104.641091571
   ]
  },
  "max_3m": {
   "gradient_pct": 17.598383798402512,
   "start_distance_m": 2173.0,
   "end_distance_m": 2176.0,
   "midpoint_distance_m": 2174.5,
   "start_elevation_m": 545.6994487798593,
   "end_elevation_m": 546.2274002938113,
   "start_xy": [
    680250.9709481783,
    4831103.390643489
   ],
   "end_xy": [
    680248.2439755728,
    4831104.641091571
   ]
  }
 },
 "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": []
 },
 "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/vt/USGS_1M_18_x67y484_VT_Statewide_A23.tif",
   "data/cache/usa/vt/USGS_1M_18_x68y484_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T23:22:55+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/vermont-260821.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-vt-4-260824",
  "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, VT_Statewide_A23 (collected 2023)",
  "elevation_tile_ids": [
   "x67y484",
   "x68y484"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.3% over 200 m (Terrain 50), gain 77.7 m over 4237 m way. EXTENDED by graph walk: +8 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 9 overlapping proposal(s): bear-mountain-road-2, booth-road, discovered-lane-43-6041-72-7792, discovered-lane-43-6068-72-7596, discovered-lane-43-6072-72-7605, discovered-lane-43-6242-72-7717 \u2026 ADOPTED (NE wave 1, 2026-08-25): big-gain. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_check": "unavailable \u2014 EPT corridor failed: VT_Statewide_2_A23: no corridor points fetched; VT_Statewide_1_A23: no EPT nodes intersect the corridor",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Killington",
  "county": "Vermont"
 }
}