{
 "ocl_version": "0.1.0",
 "name": "Falls River Road",
 "slug": "falls-river-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.54953719855382,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 106.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 102.3841971906254,
   "end_elevation_m": 102.97518793459648,
   "min_gradient_pct": -2.9304947882124566
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.981128629834057,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 105.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 102.10575407570146,
   "end_elevation_m": 102.97518793459648,
   "min_gradient_pct": -1.512868074660408
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.892043627508713,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 104.0,
   "end_distance_m": 109.0,
   "start_elevation_m": 101.86675626417166,
   "end_elevation_m": 103.21135844554709,
   "min_gradient_pct": 0.14756250354196254
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.030410266577036,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 105.0,
   "end_distance_m": 115.0,
   "start_elevation_m": 102.10575407570146,
   "end_elevation_m": 104.50879510235916,
   "min_gradient_pct": 0.28458401307062786
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.564650710853144,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 99.0,
   "end_distance_m": 119.0,
   "start_elevation_m": 100.94359996356302,
   "end_elevation_m": 105.25653010573365,
   "min_gradient_pct": 0.6711269842190859
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.084085889371693,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 98.0,
   "end_distance_m": 123.0,
   "start_elevation_m": 100.79768724855319,
   "end_elevation_m": 105.81870872089611,
   "min_gradient_pct": 0.7510228358796667
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 15.114033251908241,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 97.0,
   "end_distance_m": 147.0,
   "start_elevation_m": 100.678231050933,
   "end_elevation_m": 108.23524767688711,
   "min_gradient_pct": 0.9928948668428461
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.713656543688572,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 97.0,
   "end_distance_m": 197.0,
   "start_elevation_m": 100.678231050933,
   "end_elevation_m": 114.39188759462156,
   "min_gradient_pct": 1.2632370744434525
  }
 ],
 "shape": {
  "ascent_concentration": 0.363,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 89.0,
  "shape_class": "sustained"
 },
 "length_m": 873.7649352760754,
 "start_elevation_m": 90.57035705449286,
 "end_elevation_m": 167.1703452148411,
 "endpoint_gain_m": 76.59998816034823,
 "overall_gradient_pct": 8.766658521967997,
 "accumulated_ascent_m": 76.77718330400293,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.892043627508713,
   "start_distance_m": 104.0,
   "end_distance_m": 109.0,
   "midpoint_distance_m": 106.5,
   "start_elevation_m": 101.86675626417166,
   "end_elevation_m": 103.21135844554709,
   "start_xy": [
    269766.8181380407,
    4610372.578109381
   ],
   "end_xy": [
    269761.95539928065,
    4610371.847928764
   ]
  },
  "max_10m": {
   "gradient_pct": 24.030410266577036,
   "start_distance_m": 105.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 110.0,
   "start_elevation_m": 102.10575407570146,
   "end_elevation_m": 104.50879510235916,
   "start_xy": [
    269765.8319638042,
    4610372.743821103
   ],
   "end_xy": [
    269756.80917306547,
    4610368.980862073
   ]
  },
  "max_20m": {
   "gradient_pct": 21.564650710853144,
   "start_distance_m": 99.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 109.0,
   "start_elevation_m": 100.94359996356302,
   "end_elevation_m": 105.25653010573365,
   "start_xy": [
    269771.7015041393,
    4610371.61029952
   ],
   "end_xy": [
    269755.17315758753,
    4610365.759755964
   ]
  },
  "max_25m": {
   "gradient_pct": 20.084085889371693,
   "start_distance_m": 98.0,
   "end_distance_m": 123.0,
   "midpoint_distance_m": 110.5,
   "start_elevation_m": 100.79768724855319,
   "end_elevation_m": 105.81870872089611,
   "start_xy": [
    269772.5833413429,
    4610371.138745551
   ],
   "end_xy": [
    269755.0450284317,
    4610361.761808626
   ]
  },
  "max_50m": {
   "gradient_pct": 15.114033251908241,
   "start_distance_m": 97.0,
   "end_distance_m": 147.0,
   "midpoint_distance_m": 122.0,
   "start_elevation_m": 100.678231050933,
   "end_elevation_m": 108.23524767688711,
   "start_xy": [
    269773.46517854655,
    4610370.667191581
   ],
   "end_xy": [
    269761.52423719014,
    4610338.732558449
   ]
  },
  "max_100m": {
   "gradient_pct": 13.713656543688572,
   "start_distance_m": 97.0,
   "end_distance_m": 197.0,
   "midpoint_distance_m": 147.0,
   "start_elevation_m": 100.678231050933,
   "end_elevation_m": 114.39188759462156,
   "start_xy": [
    269773.46517854655,
    4610370.667191581
   ],
   "end_xy": [
    269746.6599335656,
    4610299.063609509
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.14756250354196254,
   "start_distance_m": 747.0,
   "end_distance_m": 752.0,
   "midpoint_distance_m": 749.5,
   "start_elevation_m": 165.097746805215,
   "end_elevation_m": 165.1051249303921,
   "start_xy": [
    269281.3238171266,
    4610006.629925587
   ],
   "end_xy": [
    269277.13444855745,
    4610003.900604977
   ]
  },
  "min_10m": {
   "gradient_pct": 0.28458401307062786,
   "start_distance_m": 746.0,
   "end_distance_m": 756.0,
   "midpoint_distance_m": 751.0,
   "start_elevation_m": 165.08813087517078,
   "end_elevation_m": 165.11658927647784,
   "start_xy": [
    269282.16169084044,
    4610007.175789709
   ],
   "end_xy": [
    269273.78295370215,
    4610001.717148489
   ]
  },
  "min_20m": {
   "gradient_pct": 0.6711269842190859,
   "start_distance_m": 747.0,
   "end_distance_m": 767.0,
   "midpoint_distance_m": 757.0,
   "start_elevation_m": 165.097746805215,
   "end_elevation_m": 165.2319722020588,
   "start_xy": [
    269281.3238171266,
    4610006.629925587
   ],
   "end_xy": [
    269264.56634285,
    4609995.712643147
   ]
  },
  "min_25m": {
   "gradient_pct": 0.7510228358796667,
   "start_distance_m": 744.0,
   "end_distance_m": 769.0,
   "midpoint_distance_m": 756.5,
   "start_elevation_m": 165.07439853841814,
   "end_elevation_m": 165.26215424738805,
   "start_xy": [
    269283.8374382681,
    4610008.267517953
   ],
   "end_xy": [
    269262.8905954223,
    4609994.6209149035
   ]
  },
  "min_50m": {
   "gradient_pct": 0.9928948668428461,
   "start_distance_m": 744.0,
   "end_distance_m": 794.0,
   "midpoint_distance_m": 769.0,
   "start_elevation_m": 165.07439853841814,
   "end_elevation_m": 165.57084597183956,
   "start_xy": [
    269283.8374382681,
    4610008.267517953
   ],
   "end_xy": [
    269242.09148029983,
    4609980.7508406285
   ]
  },
  "min_100m": {
   "gradient_pct": 1.2632370744434525,
   "start_distance_m": 742.0,
   "end_distance_m": 842.0,
   "midpoint_distance_m": 792.0,
   "start_elevation_m": 165.03434334626112,
   "end_elevation_m": 166.29758042070458,
   "start_xy": [
    269285.5131856958,
    4610009.359246197
   ],
   "end_xy": [
    269201.566443481,
    4609955.115322951
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.54953719855382,
   "start_distance_m": 106.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 107.0,
   "start_elevation_m": 102.3841971906254,
   "end_elevation_m": 102.97518793459648,
   "start_xy": [
    269764.85926203744,
    4610372.601308542
   ],
   "end_xy": [
    269762.9233535329,
    4610372.099055357
   ]
  },
  "max_3m": {
   "gradient_pct": 28.981128629834057,
   "start_distance_m": 105.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 106.5,
   "start_elevation_m": 102.10575407570146,
   "end_elevation_m": 102.97518793459648,
   "start_xy": [
    269765.8319638042,
    4610372.743821103
   ],
   "end_xy": [
    269762.9233535329,
    4610372.099055357
   ]
  }
 },
 "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/ri/USGS_1M_19_x26y461_RI_Statewide_D22.tif",
   "data/cache/usa/ri/USGS_1M_19_x26y462_RI_Statewide_D22.tif"
  ],
  "calculated_at": "2026-08-24T22:23:45+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/rhode-island-2026-08-23.osm.pbf",
  "osm_snapshot": "2026-08-22T20:21:28Z",
  "run_id": "redo-ri-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, RI_Statewide_D22 (collected 2022)",
  "elevation_tile_ids": [
   "x26y461",
   "x26y462"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.0% over 200 m (Terrain 50), gain 74.5 m over 849 m way. EXTENDED by graph walk: +1 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (NE wave 1, 2026-08-25): big-gain,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": "West Greenwich",
  "county": "Rhode Island"
 }
}