{
 "ocl_version": "0.1.0",
 "name": "Newton Road",
 "slug": "newton-road-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.53545305401144,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 275.0,
   "end_distance_m": 277.0,
   "start_elevation_m": 416.2987206640024,
   "end_elevation_m": 416.90942972508265,
   "min_gradient_pct": -5.207727350992286
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.847178674322095,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 275.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 416.2987206640024,
   "end_elevation_m": 417.1941360242321,
   "min_gradient_pct": -4.400872369637909
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.131703787379138,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 273.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 415.8375508348631,
   "end_elevation_m": 417.1941360242321,
   "min_gradient_pct": -3.138804516821665
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.663779978387993,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 273.0,
   "end_distance_m": 283.0,
   "start_elevation_m": 415.8375508348631,
   "end_elevation_m": 418.4039288327019,
   "min_gradient_pct": -2.7397231962669366
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.694921248655703,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 265.0,
   "end_distance_m": 285.0,
   "start_elevation_m": 414.45309229686865,
   "end_elevation_m": 418.7920765465998,
   "min_gradient_pct": -0.014838312058600422
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.4535899651587,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 260.0,
   "end_distance_m": 285.0,
   "start_elevation_m": 413.6786790553101,
   "end_elevation_m": 418.7920765465998,
   "min_gradient_pct": 0.10575258198309712
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.939331138944226,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 235.0,
   "end_distance_m": 285.0,
   "start_elevation_m": 409.8224109771277,
   "end_elevation_m": 418.7920765465998,
   "min_gradient_pct": 0.9831620824805896
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.3369172652869,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 193.0,
   "end_distance_m": 293.0,
   "start_elevation_m": 403.5621474010493,
   "end_elevation_m": 419.8990646663362,
   "min_gradient_pct": 2.9838617360510966
  }
 ],
 "shape": {
  "ascent_concentration": 0.405,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 228.0,
  "shape_class": "sustained"
 },
 "length_m": 472.61924038245434,
 "start_elevation_m": 387.0302493512996,
 "end_elevation_m": 433.2514996895453,
 "endpoint_gain_m": 46.22125033824574,
 "overall_gradient_pct": 9.779807165878909,
 "accumulated_ascent_m": 46.580321132656024,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.131703787379138,
   "start_distance_m": 273.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 275.5,
   "start_elevation_m": 415.8375508348631,
   "end_elevation_m": 417.1941360242321,
   "start_xy": [
    696158.6179522923,
    4821392.500565572
   ],
   "end_xy": [
    696155.6398560453,
    4821388.484231081
   ]
  },
  "max_10m": {
   "gradient_pct": 25.663779978387993,
   "start_distance_m": 273.0,
   "end_distance_m": 283.0,
   "midpoint_distance_m": 278.0,
   "start_elevation_m": 415.8375508348631,
   "end_elevation_m": 418.4039288327019,
   "start_xy": [
    696158.6179522923,
    4821392.500565572
   ],
   "end_xy": [
    696152.6617597982,
    4821384.46789659
   ]
  },
  "max_20m": {
   "gradient_pct": 21.694921248655703,
   "start_distance_m": 265.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 414.45309229686865,
   "end_elevation_m": 418.7920765465998,
   "start_xy": [
    696163.3829062876,
    4821398.926700757
   ],
   "end_xy": [
    696151.4705212994,
    4821382.8613627935
   ]
  },
  "max_25m": {
   "gradient_pct": 20.4535899651587,
   "start_distance_m": 260.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 272.5,
   "start_elevation_m": 413.6786790553101,
   "end_elevation_m": 418.7920765465998,
   "start_xy": [
    696166.3610025345,
    4821402.943035248
   ],
   "end_xy": [
    696151.4705212994,
    4821382.8613627935
   ]
  },
  "max_50m": {
   "gradient_pct": 17.939331138944226,
   "start_distance_m": 235.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 260.0,
   "start_elevation_m": 409.8224109771277,
   "end_elevation_m": 418.7920765465998,
   "start_xy": [
    696181.2514837696,
    4821423.024707703
   ],
   "end_xy": [
    696151.4705212994,
    4821382.8613627935
   ]
  },
  "max_100m": {
   "gradient_pct": 16.3369172652869,
   "start_distance_m": 193.0,
   "end_distance_m": 293.0,
   "midpoint_distance_m": 243.0,
   "start_elevation_m": 403.5621474010493,
   "end_elevation_m": 419.8990646663362,
   "start_xy": [
    696206.2674922447,
    4821456.761917427
   ],
   "end_xy": [
    696146.7055673042,
    4821376.435227607
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.138804516821665,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 387.0302493512996,
   "end_elevation_m": 386.8733091254585,
   "start_xy": [
    696276.741,
    4821631.652
   ],
   "end_xy": [
    696275.9978569412,
    4821626.707534569
   ]
  },
  "min_10m": {
   "gradient_pct": -2.7397231962669366,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 387.0302493512996,
   "end_elevation_m": 386.7562770316729,
   "start_xy": [
    696276.741,
    4821631.652
   ],
   "end_xy": [
    696275.2547138823,
    4821621.763069139
   ]
  },
  "min_20m": {
   "gradient_pct": -0.014838312058600422,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 387.0302493512996,
   "end_elevation_m": 387.02728168888785,
   "start_xy": [
    696276.741,
    4821631.652
   ],
   "end_xy": [
    696273.7684277645,
    4821611.874138278
   ]
  },
  "min_25m": {
   "gradient_pct": 0.10575258198309712,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 387.0302493512996,
   "end_elevation_m": 387.05668749679535,
   "start_xy": [
    696276.741,
    4821631.652
   ],
   "end_xy": [
    696273.0252847057,
    4821606.929672847
   ]
  },
  "min_50m": {
   "gradient_pct": 0.9831620824805896,
   "start_distance_m": 378.0,
   "end_distance_m": 428.0,
   "midpoint_distance_m": 403.0,
   "start_elevation_m": 430.6632979737159,
   "end_elevation_m": 431.1548790149562,
   "start_xy": [
    696102.9635670152,
    4821304.613478921
   ],
   "end_xy": [
    696094.1867173596,
    4821255.512675204
   ]
  },
  "min_100m": {
   "gradient_pct": 2.9838617360510966,
   "start_distance_m": 372.0,
   "end_distance_m": 472.0,
   "midpoint_distance_m": 422.0,
   "start_elevation_m": 430.27304508591857,
   "end_elevation_m": 433.25690682196966,
   "start_xy": [
    696104.8093529548,
    4821310.322513363
   ],
   "end_xy": [
    696081.3357154874,
    4821213.5734229805
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.53545305401144,
   "start_distance_m": 275.0,
   "end_distance_m": 277.0,
   "midpoint_distance_m": 276.0,
   "start_elevation_m": 416.2987206640024,
   "end_elevation_m": 416.90942972508265,
   "start_xy": [
    696157.4267137934,
    4821390.894031775
   ],
   "end_xy": [
    696156.2354752946,
    4821389.287497979
   ]
  },
  "max_3m": {
   "gradient_pct": 29.847178674322095,
   "start_distance_m": 275.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 276.5,
   "start_elevation_m": 416.2987206640024,
   "end_elevation_m": 417.1941360242321,
   "start_xy": [
    696157.4267137934,
    4821390.894031775
   ],
   "end_xy": [
    696155.6398560453,
    4821388.484231081
   ]
  }
 },
 "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/vt/USGS_1M_18_x69y483_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T23:50:42+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-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, VT_Statewide_A23 (collected 2023)",
  "elevation_tile_ids": [
   "x69y483"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 14.8% over 200 m (Terrain 50), gain 45.8 m over 473 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 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": "Reading",
  "county": "Vermont"
 }
}