{
 "ocl_version": "0.1.0",
 "name": "Manville Hill Road",
 "slug": "manville-hill-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 12.515712548680114,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 137.0,
   "end_distance_m": 139.0,
   "start_elevation_m": 39.81206567954765,
   "end_elevation_m": 40.06237993052125,
   "min_gradient_pct": -5.020047445364995
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 12.418326306396684,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 137.0,
   "end_distance_m": 140.0,
   "start_elevation_m": 39.81206567954765,
   "end_elevation_m": 40.18461546873955,
   "min_gradient_pct": -4.8937711908647445
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 12.14566480107365,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 135.0,
   "end_distance_m": 140.0,
   "start_elevation_m": 39.57733222868587,
   "end_elevation_m": 40.18461546873955,
   "min_gradient_pct": -4.838527019455086
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 12.103789341834386,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 130.0,
   "end_distance_m": 140.0,
   "start_elevation_m": 38.97423653455611,
   "end_elevation_m": 40.18461546873955,
   "min_gradient_pct": -4.653538376762256
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 11.985316829149966,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 126.0,
   "end_distance_m": 146.0,
   "start_elevation_m": 38.501111962817944,
   "end_elevation_m": 40.89817532864794,
   "min_gradient_pct": -4.37915625085882
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 11.890065704338724,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 124.0,
   "end_distance_m": 149.0,
   "start_elevation_m": 38.28052417036854,
   "end_elevation_m": 41.25304059645322,
   "min_gradient_pct": -4.096246650222213
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 11.830435550976077,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 126.0,
   "end_distance_m": 176.0,
   "start_elevation_m": 38.501111962817944,
   "end_elevation_m": 44.41632973830598,
   "min_gradient_pct": -2.692119279495273
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 11.500988812035004,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 106.0,
   "end_distance_m": 206.0,
   "start_elevation_m": 36.275481496397376,
   "end_elevation_m": 47.77647030843238,
   "min_gradient_pct": 0.009965278086561113
  }
 ],
 "shape": {
  "ascent_concentration": 0.391,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 121.0,
  "shape_class": "sustained"
 },
 "length_m": 1187.110626223254,
 "start_elevation_m": 35.66850343412451,
 "end_elevation_m": 105.46286946176173,
 "endpoint_gain_m": 69.79436602763721,
 "overall_gradient_pct": 5.879348098305315,
 "accumulated_ascent_m": 71.16851619736589,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 12.14566480107365,
   "start_distance_m": 135.0,
   "end_distance_m": 140.0,
   "midpoint_distance_m": 137.5,
   "start_elevation_m": 39.57733222868587,
   "end_elevation_m": 40.18461546873955,
   "start_xy": [
    295447.9299058758,
    4649639.431064868
   ],
   "end_xy": [
    295451.7378767485,
    4649642.671170903
   ]
  },
  "max_10m": {
   "gradient_pct": 12.103789341834386,
   "start_distance_m": 130.0,
   "end_distance_m": 140.0,
   "midpoint_distance_m": 135.0,
   "start_elevation_m": 38.97423653455611,
   "end_elevation_m": 40.18461546873955,
   "start_xy": [
    295444.0255362045,
    4649636.307624317
   ],
   "end_xy": [
    295451.7378767485,
    4649642.671170903
   ]
  },
  "max_20m": {
   "gradient_pct": 11.985316829149966,
   "start_distance_m": 126.0,
   "end_distance_m": 146.0,
   "midpoint_distance_m": 136.0,
   "start_elevation_m": 38.501111962817944,
   "end_elevation_m": 40.89817532864794,
   "start_xy": [
    295440.90283885103,
    4649633.80787232
   ],
   "end_xy": [
    295456.29581481364,
    4649646.573117933
   ]
  },
  "max_25m": {
   "gradient_pct": 11.890065704338724,
   "start_distance_m": 124.0,
   "end_distance_m": 149.0,
   "midpoint_distance_m": 136.5,
   "start_elevation_m": 38.28052417036854,
   "end_elevation_m": 41.25304059645322,
   "start_xy": [
    295439.34080871486,
    4649632.558848203
   ],
   "end_xy": [
    295458.5747836587,
    4649648.524091287
   ]
  },
  "max_50m": {
   "gradient_pct": 11.830435550976077,
   "start_distance_m": 126.0,
   "end_distance_m": 176.0,
   "midpoint_distance_m": 151.0,
   "start_elevation_m": 38.501111962817944,
   "end_elevation_m": 44.41632973830598,
   "start_xy": [
    295440.90283885103,
    4649633.80787232
   ],
   "end_xy": [
    295478.6709491309,
    4649666.551526644
   ]
  },
  "max_100m": {
   "gradient_pct": 11.500988812035004,
   "start_distance_m": 106.0,
   "end_distance_m": 206.0,
   "midpoint_distance_m": 156.0,
   "start_elevation_m": 36.275481496397376,
   "end_elevation_m": 47.77647030843238,
   "start_xy": [
    295425.35571827815,
    4649621.277788718
   ],
   "end_xy": [
    295499.7179532964,
    4649687.920293654
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.838527019455086,
   "start_distance_m": 1.0,
   "end_distance_m": 6.0,
   "midpoint_distance_m": 3.5,
   "start_elevation_m": 35.62237898060102,
   "end_elevation_m": 35.380452629628266,
   "start_xy": [
    295357.3449331252,
    4649541.331919058
   ],
   "end_xy": [
    295360.52791858895,
    4649545.187901463
   ]
  },
  "min_10m": {
   "gradient_pct": -4.653538376762256,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 35.66850343412451,
   "end_elevation_m": 35.203149596448284,
   "start_xy": [
    295356.708,
    4649540.561
   ],
   "end_xy": [
    295363.07505653275,
    4649548.272068532
   ]
  },
  "min_20m": {
   "gradient_pct": -4.37915625085882,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 35.66850343412451,
   "end_elevation_m": 34.792672183952746,
   "start_xy": [
    295356.708,
    4649540.561
   ],
   "end_xy": [
    295369.4416223093,
    4649555.983542265
   ]
  },
  "min_25m": {
   "gradient_pct": -4.096246650222213,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 35.66850343412451,
   "end_elevation_m": 34.64444177156896,
   "start_xy": [
    295356.708,
    4649540.561
   ],
   "end_xy": [
    295372.6250986349,
    4649559.839119383
   ]
  },
  "min_50m": {
   "gradient_pct": -2.692119279495273,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 35.66850343412451,
   "end_elevation_m": 34.32244379437687,
   "start_xy": [
    295356.708,
    4649540.561
   ],
   "end_xy": [
    295388.38186918985,
    4649579.23599035
   ]
  },
  "min_100m": {
   "gradient_pct": 0.009965278086561113,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 35.66850343412451,
   "end_elevation_m": 35.67846871221107,
   "start_xy": [
    295356.708,
    4649540.561
   ],
   "end_xy": [
    295421.31515510136,
    4649616.84226838
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 12.515712548680114,
   "start_distance_m": 137.0,
   "end_distance_m": 139.0,
   "midpoint_distance_m": 138.0,
   "start_elevation_m": 39.81206567954765,
   "end_elevation_m": 40.06237993052125,
   "start_xy": [
    295449.4598192442,
    4649640.719133502
   ],
   "end_xy": [
    295450.9788260779,
    4649642.020139363
   ]
  },
  "max_3m": {
   "gradient_pct": 12.418326306396684,
   "start_distance_m": 137.0,
   "end_distance_m": 140.0,
   "midpoint_distance_m": 138.5,
   "start_elevation_m": 39.81206567954765,
   "end_elevation_m": 40.18461546873955,
   "start_xy": [
    295449.4598192442,
    4649640.719133502
   ],
   "end_xy": [
    295451.7378767485,
    4649642.671170903
   ]
  }
 },
 "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": [
   "descends_at_start"
  ]
 },
 "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/ri/USGS_1M_19_x29y465_RI_Statewide_D22.tif",
   "data/cache/usa/ri/USGS_1M_19_x29y466_RI_Statewide_D22.tif"
  ],
  "calculated_at": "2026-09-03T18:44:10+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/manville-hill-road/manville-hill-road.geojson",
  "run_id": "canopy-all-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, RI_Statewide_D22 (collected 2022)",
  "elevation_tile_ids": [
   "x29y465",
   "x29y466"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: MA_NE_CMGP_Sandy_Z19_A1_2015: no corridor points fetched",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Cumberland",
  "county": "Rhode Island"
 }
}