{
 "ocl_version": "0.1.0",
 "name": "Wallum Lake Road",
 "slug": "wallum-lake-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 12.739808748564485,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 7208.0,
   "end_distance_m": 7210.0,
   "start_elevation_m": 190.1987838456883,
   "end_elevation_m": 190.4535800206596,
   "min_gradient_pct": -6.188781445428049
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 12.601060844353166,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 7208.0,
   "end_distance_m": 7211.0,
   "start_elevation_m": 190.1987838456883,
   "end_elevation_m": 190.5768156710189,
   "min_gradient_pct": -6.103104199721088
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 12.395655852764094,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 7217.0,
   "end_distance_m": 7222.0,
   "start_elevation_m": 191.30382912386798,
   "end_elevation_m": 191.9236119165062,
   "min_gradient_pct": -5.969344677886852
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 12.29953231288249,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 7212.0,
   "end_distance_m": 7222.0,
   "start_elevation_m": 190.69365868521794,
   "end_elevation_m": 191.9236119165062,
   "min_gradient_pct": -5.857406555464877
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 12.253592012983745,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 7203.0,
   "end_distance_m": 7223.0,
   "start_elevation_m": 189.59041526944247,
   "end_elevation_m": 192.04113367203922,
   "min_gradient_pct": -5.7638198047001765
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 12.227728659584841,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 7197.0,
   "end_distance_m": 7222.0,
   "start_elevation_m": 188.86667975160998,
   "end_elevation_m": 191.9236119165062,
   "min_gradient_pct": -5.72696527996834
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 11.742096046792142,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 7180.0,
   "end_distance_m": 7230.0,
   "start_elevation_m": 186.94808242246032,
   "end_elevation_m": 192.8191304458564,
   "min_gradient_pct": -5.673179858313858
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 10.290817100237007,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 7165.0,
   "end_distance_m": 7265.0,
   "start_elevation_m": 185.63857983543033,
   "end_elevation_m": 195.92939693566734,
   "min_gradient_pct": -5.5595597228570455
  }
 ],
 "shape": {
  "ascent_concentration": 0.432,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 58.0,
  "shape_class": "sustained"
 },
 "length_m": 8045.313748910077,
 "start_elevation_m": 131.2582384105881,
 "end_elevation_m": 216.86396851446932,
 "endpoint_gain_m": 85.60573010388123,
 "overall_gradient_pct": 1.0640446448154803,
 "accumulated_ascent_m": 117.02478628235397,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 12.395655852764094,
   "start_distance_m": 7217.0,
   "end_distance_m": 7222.0,
   "midpoint_distance_m": 7219.5,
   "start_elevation_m": 191.30382912386798,
   "end_elevation_m": 191.9236119165062,
   "start_xy": [
    271887.41237498715,
    4653811.770127398
   ],
   "end_xy": [
    271892.3636914724,
    4653812.4661595505
   ]
  },
  "max_10m": {
   "gradient_pct": 12.29953231288249,
   "start_distance_m": 7212.0,
   "end_distance_m": 7222.0,
   "midpoint_distance_m": 7217.0,
   "start_elevation_m": 190.69365868521794,
   "end_elevation_m": 191.9236119165062,
   "start_xy": [
    271882.4799619913,
    4653810.963252487
   ],
   "end_xy": [
    271892.3636914724,
    4653812.4661595505
   ]
  },
  "max_20m": {
   "gradient_pct": 12.253592012983745,
   "start_distance_m": 7203.0,
   "end_distance_m": 7223.0,
   "midpoint_distance_m": 7213.0,
   "start_elevation_m": 189.59041526944247,
   "end_elevation_m": 192.04113367203922,
   "start_xy": [
    271873.6595377216,
    4653809.174369394
   ],
   "end_xy": [
    271893.3539958341,
    4653812.605074163
   ]
  },
  "max_25m": {
   "gradient_pct": 12.227728659584841,
   "start_distance_m": 7197.0,
   "end_distance_m": 7222.0,
   "midpoint_distance_m": 7209.5,
   "start_elevation_m": 188.86667975160998,
   "end_elevation_m": 191.9236119165062,
   "start_xy": [
    271867.7793461125,
    4653807.981330486
   ],
   "end_xy": [
    271892.3636914724,
    4653812.4661595505
   ]
  },
  "max_50m": {
   "gradient_pct": 11.742096046792142,
   "start_distance_m": 7180.0,
   "end_distance_m": 7230.0,
   "midpoint_distance_m": 7205.0,
   "start_elevation_m": 186.94808242246032,
   "end_elevation_m": 192.8191304458564,
   "start_xy": [
    271851.1185366644,
    4653804.60236918
   ],
   "end_xy": [
    271900.2859035474,
    4653813.579061205
   ]
  },
  "max_100m": {
   "gradient_pct": 10.290817100237007,
   "start_distance_m": 7165.0,
   "end_distance_m": 7265.0,
   "midpoint_distance_m": 7215.0,
   "start_elevation_m": 185.63857983543033,
   "end_elevation_m": 195.92939693566734,
   "start_xy": [
    271836.4227946804,
    4653801.596860638
   ],
   "end_xy": [
    271935.2289333031,
    4653813.618274264
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.969344677886852,
   "start_distance_m": 5848.0,
   "end_distance_m": 5853.0,
   "midpoint_distance_m": 5850.5,
   "start_elevation_m": 178.78259789755836,
   "end_elevation_m": 178.48413066366402,
   "start_xy": [
    271508.40785155806,
    4652735.201703957
   ],
   "end_xy": [
    271509.27590940427,
    4652740.125774502
   ]
  },
  "min_10m": {
   "gradient_pct": -5.857406555464877,
   "start_distance_m": 5844.0,
   "end_distance_m": 5854.0,
   "midpoint_distance_m": 5849.0,
   "start_elevation_m": 179.01609585136953,
   "end_elevation_m": 178.43035519582304,
   "start_xy": [
    271507.7128683776,
    4652731.262542252
   ],
   "end_xy": [
    271509.44982198434,
    4652741.110535575
   ]
  },
  "min_20m": {
   "gradient_pct": -5.7638198047001765,
   "start_distance_m": 5844.0,
   "end_distance_m": 5864.0,
   "midpoint_distance_m": 5854.0,
   "start_elevation_m": 179.01609585136953,
   "end_elevation_m": 177.8633318904295,
   "start_xy": [
    271507.7128683776,
    4652731.262542252
   ],
   "end_xy": [
    271511.18589343654,
    4652750.958684109
   ]
  },
  "min_25m": {
   "gradient_pct": -5.72696527996834,
   "start_distance_m": 5846.0,
   "end_distance_m": 5871.0,
   "midpoint_distance_m": 5858.5,
   "start_elevation_m": 178.90001687603402,
   "end_elevation_m": 177.46827555604193,
   "start_xy": [
    271508.0598191108,
    4652733.232218419
   ],
   "end_xy": [
    271512.40177650214,
    4652757.852276617
   ]
  },
  "min_50m": {
   "gradient_pct": -5.673179858313858,
   "start_distance_m": 5836.0,
   "end_distance_m": 5886.0,
   "midpoint_distance_m": 5861.0,
   "start_elevation_m": 179.46503017294972,
   "end_elevation_m": 176.6284402437928,
   "start_xy": [
    271506.3239550819,
    4652723.384033078
   ],
   "end_xy": [
    271514.94725534355,
    4652772.63447841
   ]
  },
  "min_100m": {
   "gradient_pct": -5.5595597228570455,
   "start_distance_m": 5826.0,
   "end_distance_m": 5926.0,
   "midpoint_distance_m": 5876.0,
   "start_elevation_m": 179.98566550313745,
   "end_elevation_m": 174.4261057802804,
   "start_xy": [
    271504.587883286,
    4652713.535884606
   ],
   "end_xy": [
    271521.41632372845,
    4652812.10789764
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 12.739808748564485,
   "start_distance_m": 7208.0,
   "end_distance_m": 7210.0,
   "midpoint_distance_m": 7209.0,
   "start_elevation_m": 190.1987838456883,
   "end_elevation_m": 190.4535800206596,
   "start_xy": [
    271878.5597332799,
    4653810.168391358
   ],
   "end_xy": [
    271880.5197684223,
    4653810.566213179
   ]
  },
  "max_3m": {
   "gradient_pct": 12.601060844353166,
   "start_distance_m": 7208.0,
   "end_distance_m": 7211.0,
   "midpoint_distance_m": 7209.5,
   "start_elevation_m": 190.1987838456883,
   "end_elevation_m": 190.5768156710189,
   "start_xy": [
    271878.5597332799,
    4653810.168391358
   ],
   "end_xy": [
    271881.4997847637,
    4653810.7651299825
   ]
  }
 },
 "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ri/USGS_1M_19_x27y465_RI_Statewide_D22.tif",
   "data/cache/usa/ri/USGS_1M_19_x27y466_RI_Statewide_D22.tif"
  ],
  "calculated_at": "2026-09-03T21:53:54+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/wallum-lake-road/wallum-lake-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": [
   "x27y465",
   "x27y466"
  ],
  "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": "Burrillville",
  "county": "Rhode Island"
 }
}