{
 "ocl_version": "0.1.0",
 "name": "Maple Valley Road",
 "slug": "maple-valley-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 13.008175745061124,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3258.0,
   "end_distance_m": 3260.0,
   "start_elevation_m": 137.08722753159543,
   "end_elevation_m": 137.34739104649665,
   "min_gradient_pct": -11.528863545775181
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 12.60687132955809,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3257.0,
   "end_distance_m": 3260.0,
   "start_elevation_m": 136.9691849066099,
   "end_elevation_m": 137.34739104649665,
   "min_gradient_pct": -11.42782515387116
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 12.408280603032154,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3258.0,
   "end_distance_m": 3263.0,
   "start_elevation_m": 137.08722753159543,
   "end_elevation_m": 137.70764156174704,
   "min_gradient_pct": -11.248722911612106
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 12.331302309405032,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3256.0,
   "end_distance_m": 3266.0,
   "start_elevation_m": 136.8477042827014,
   "end_elevation_m": 138.0808345136419,
   "min_gradient_pct": -11.184811313732581
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 11.931397954383556,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3247.0,
   "end_distance_m": 3267.0,
   "start_elevation_m": 135.814371288136,
   "end_elevation_m": 138.2006508790127,
   "min_gradient_pct": -11.05238144832633
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 11.95854295353206,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3241.0,
   "end_distance_m": 3266.0,
   "start_elevation_m": 135.09119877525887,
   "end_elevation_m": 138.0808345136419,
   "min_gradient_pct": -10.828960184491962
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 11.507155668972132,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3225.0,
   "end_distance_m": 3275.0,
   "start_elevation_m": 133.2967473011115,
   "end_elevation_m": 139.05032513559757,
   "min_gradient_pct": -9.069858322126095
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 10.662886101558142,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3221.0,
   "end_distance_m": 3321.0,
   "start_elevation_m": 132.9231039155488,
   "end_elevation_m": 143.58599001710695,
   "min_gradient_pct": -7.44343684599754
  }
 ],
 "shape": {
  "ascent_concentration": 0.454,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 57.0,
  "shape_class": "stepped"
 },
 "length_m": 4441.42643025182,
 "start_elevation_m": 92.03597159448637,
 "end_elevation_m": 171.27682197949753,
 "endpoint_gain_m": 79.24085038501116,
 "overall_gradient_pct": 1.7841306532801975,
 "accumulated_ascent_m": 107.2961021957065,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 12.408280603032154,
   "start_distance_m": 3258.0,
   "end_distance_m": 3263.0,
   "midpoint_distance_m": 3260.5,
   "start_elevation_m": 137.08722753159543,
   "end_elevation_m": 137.70764156174704,
   "start_xy": [
    276124.7806668187,
    4622006.987176552
   ],
   "end_xy": [
    276121.58958076773,
    4622003.141689933
   ]
  },
  "max_10m": {
   "gradient_pct": 12.331302309405032,
   "start_distance_m": 3256.0,
   "end_distance_m": 3266.0,
   "midpoint_distance_m": 3261.0,
   "start_elevation_m": 136.8477042827014,
   "end_elevation_m": 138.0808345136419,
   "start_xy": [
    276126.11843057023,
    4622008.473913818
   ],
   "end_xy": [
    276119.758252917,
    4622000.765508705
   ]
  },
  "max_20m": {
   "gradient_pct": 11.931397954383556,
   "start_distance_m": 3247.0,
   "end_distance_m": 3267.0,
   "midpoint_distance_m": 3257.0,
   "start_elevation_m": 135.814371288136,
   "end_elevation_m": 138.2006508790127,
   "start_xy": [
    276131.26553106465,
    4622015.808543245
   ],
   "end_xy": [
    276119.14805884415,
    4621999.97325673
   ]
  },
  "max_25m": {
   "gradient_pct": 11.95854295353206,
   "start_distance_m": 3241.0,
   "end_distance_m": 3266.0,
   "midpoint_distance_m": 3253.5,
   "start_elevation_m": 135.09119877525887,
   "end_elevation_m": 138.0808345136419,
   "start_xy": [
    276135.2067438473,
    4622020.330266105
   ],
   "end_xy": [
    276119.758252917,
    4622000.765508705
   ]
  },
  "max_50m": {
   "gradient_pct": 11.507155668972132,
   "start_distance_m": 3225.0,
   "end_distance_m": 3275.0,
   "midpoint_distance_m": 3250.0,
   "start_elevation_m": 133.2967473011115,
   "end_elevation_m": 139.05032513559757,
   "start_xy": [
    276145.76849127305,
    4622032.348978706
   ],
   "end_xy": [
    276114.0080161695,
    4621993.844042252
   ]
  },
  "max_100m": {
   "gradient_pct": 10.662886101558142,
   "start_distance_m": 3221.0,
   "end_distance_m": 3321.0,
   "midpoint_distance_m": 3271.0,
   "start_elevation_m": 132.9231039155488,
   "end_elevation_m": 143.58599001710695,
   "start_xy": [
    276148.4095821507,
    4622035.353082114
   ],
   "end_xy": [
    276079.9783265052,
    4621962.999735584
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.248722911612106,
   "start_distance_m": 2451.0,
   "end_distance_m": 2456.0,
   "midpoint_distance_m": 2453.5,
   "start_elevation_m": 109.00241606784611,
   "end_elevation_m": 108.43997992226551,
   "start_xy": [
    276823.7512520069,
    4622237.441832726
   ],
   "end_xy": [
    276818.9468002361,
    4622238.826108873
   ]
  },
  "min_10m": {
   "gradient_pct": -11.184811313732581,
   "start_distance_m": 2447.0,
   "end_distance_m": 2457.0,
   "midpoint_distance_m": 2452.0,
   "start_elevation_m": 109.44787136374319,
   "end_elevation_m": 108.32939023236993,
   "start_xy": [
    276827.57551032084,
    4622236.269211261
   ],
   "end_xy": [
    276817.9850582223,
    4622239.100065606
   ]
  },
  "min_20m": {
   "gradient_pct": -11.05238144832633,
   "start_distance_m": 2446.0,
   "end_distance_m": 2466.0,
   "midpoint_distance_m": 2456.0,
   "start_elevation_m": 109.55668284265863,
   "end_elevation_m": 107.34620655299337,
   "start_xy": [
    276828.53158331825,
    4622235.976082728
   ],
   "end_xy": [
    276809.42397059,
    4622241.87070377
   ]
  },
  "min_25m": {
   "gradient_pct": -10.828960184491962,
   "start_distance_m": 2442.0,
   "end_distance_m": 2467.0,
   "midpoint_distance_m": 2454.5,
   "start_elevation_m": 109.95011102094121,
   "end_elevation_m": 107.24287097481822,
   "start_xy": [
    276832.3560802909,
    4622234.804236898
   ],
   "end_xy": [
    276808.49134822545,
    4622242.231557653
   ]
  },
  "min_50m": {
   "gradient_pct": -9.069858322126095,
   "start_distance_m": 2429.0,
   "end_distance_m": 2479.0,
   "midpoint_distance_m": 2454.0,
   "start_elevation_m": 110.81769169962405,
   "end_elevation_m": 106.282762538561,
   "start_xy": [
    276844.93979342864,
    4622231.588282707
   ],
   "end_xy": [
    276797.4004608054,
    4622246.80746085
   ]
  },
  "min_100m": {
   "gradient_pct": -7.44343684599754,
   "start_distance_m": 631.0,
   "end_distance_m": 731.0,
   "midpoint_distance_m": 681.0,
   "start_elevation_m": 96.49936451877034,
   "end_elevation_m": 89.0559276727728,
   "start_xy": [
    278515.83877294813,
    4622058.234114072
   ],
   "end_xy": [
    278417.8257920214,
    4622053.868168987
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 13.008175745061124,
   "start_distance_m": 3258.0,
   "end_distance_m": 3260.0,
   "midpoint_distance_m": 3259.0,
   "start_elevation_m": 137.08722753159543,
   "end_elevation_m": 137.34739104649665,
   "start_xy": [
    276124.7806668187,
    4622006.987176552
   ],
   "end_xy": [
    276123.44743056834,
    4622005.496502931
   ]
  },
  "max_3m": {
   "gradient_pct": 12.60687132955809,
   "start_distance_m": 3257.0,
   "end_distance_m": 3260.0,
   "midpoint_distance_m": 3258.5,
   "start_elevation_m": 136.9691849066099,
   "end_elevation_m": 137.34739104649665,
   "start_xy": [
    276125.44970784266,
    4622007.7304019835
   ],
   "end_xy": [
    276123.44743056834,
    4622005.496502931
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.509,
   "obstruction_max_height_m": 26.0,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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_x27y463_RI_Statewide_D22.tif"
  ],
  "calculated_at": "2026-09-03T18:46:12+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/maple-valley-road/maple-valley-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": [
   "x27y463"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/RI_Statewide_1_D22",
   "ept_crs": "EPSG:3857",
   "station_coverage": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Coventry",
  "county": "Rhode Island"
 }
}