{
 "ocl_version": "0.1.0",
 "name": "Bridgewater Hill Road",
 "slug": "bridgewater-hill-road-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.22820991740997,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 366.0,
   "end_distance_m": 368.0,
   "start_elevation_m": 204.07073943956877,
   "end_elevation_m": 204.53530363791697,
   "min_gradient_pct": -13.372090412596549
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 20.974525523359944,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 366.0,
   "end_distance_m": 369.0,
   "start_elevation_m": 204.07073943956877,
   "end_elevation_m": 204.69997520526957,
   "min_gradient_pct": -13.18677600117629
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 19.83388345544597,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 363.0,
   "end_distance_m": 368.0,
   "start_elevation_m": 203.54360946514467,
   "end_elevation_m": 204.53530363791697,
   "min_gradient_pct": -12.513055377887667
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 19.304924529967877,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 358.0,
   "end_distance_m": 368.0,
   "start_elevation_m": 202.60481118492018,
   "end_elevation_m": 204.53530363791697,
   "min_gradient_pct": -12.426108098734403
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 18.608706127232466,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 359.0,
   "end_distance_m": 379.0,
   "start_elevation_m": 202.77258753538797,
   "end_elevation_m": 206.49432876083446,
   "min_gradient_pct": -11.475085858048999
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 18.537683577150688,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 227.0,
   "end_distance_m": 252.0,
   "start_elevation_m": 179.83763572379794,
   "end_elevation_m": 184.47205661808562,
   "min_gradient_pct": -11.018083526324972
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.211190689653392,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 226.0,
   "end_distance_m": 276.0,
   "start_elevation_m": 179.65995628129605,
   "end_elevation_m": 188.76555162612274,
   "min_gradient_pct": -9.184369571940238
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.767071683860706,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 203.0,
   "end_distance_m": 303.0,
   "start_elevation_m": 175.67897216143388,
   "end_elevation_m": 193.44604384529458,
   "min_gradient_pct": -7.053024219278257
  }
 ],
 "shape": {
  "ascent_concentration": 0.464,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 543.0,
  "shape_class": "stepped"
 },
 "length_m": 4401.743076903774,
 "start_elevation_m": 164.22707278319479,
 "end_elevation_m": 408.3818519274636,
 "endpoint_gain_m": 244.1547791442688,
 "overall_gradient_pct": 5.546774877101857,
 "accumulated_ascent_m": 286.0170874460838,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 19.83388345544597,
   "start_distance_m": 363.0,
   "end_distance_m": 368.0,
   "midpoint_distance_m": 365.5,
   "start_elevation_m": 203.54360946514467,
   "end_elevation_m": 204.53530363791697,
   "start_xy": [
    284214.5691846501,
    4842307.361645427
   ],
   "end_xy": [
    284215.4393072494,
    4842302.437938848
   ]
  },
  "max_10m": {
   "gradient_pct": 19.304924529967877,
   "start_distance_m": 358.0,
   "end_distance_m": 368.0,
   "midpoint_distance_m": 363.0,
   "start_elevation_m": 202.60481118492018,
   "end_elevation_m": 204.53530363791697,
   "start_xy": [
    284214.01322505856,
    4842312.31576126
   ],
   "end_xy": [
    284215.4393072494,
    4842302.437938848
   ]
  },
  "max_20m": {
   "gradient_pct": 18.608706127232466,
   "start_distance_m": 359.0,
   "end_distance_m": 379.0,
   "midpoint_distance_m": 369.0,
   "start_elevation_m": 202.77258753538797,
   "end_elevation_m": 206.49432876083446,
   "start_xy": [
    284214.03022260265,
    4842311.315905728
   ],
   "end_xy": [
    284217.7866186508,
    4842291.718679377
   ]
  },
  "max_25m": {
   "gradient_pct": 18.537683577150688,
   "start_distance_m": 227.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 239.5,
   "start_elevation_m": 179.83763572379794,
   "end_elevation_m": 184.47205661808562,
   "start_xy": [
    284246.70239016705,
    4842437.617711339
   ],
   "end_xy": [
    284237.7925130475,
    4842414.28500664
   ]
  },
  "max_50m": {
   "gradient_pct": 18.211190689653392,
   "start_distance_m": 226.0,
   "end_distance_m": 276.0,
   "midpoint_distance_m": 251.0,
   "start_elevation_m": 179.65995628129605,
   "end_elevation_m": 188.76555162612274,
   "start_xy": [
    284246.9924041632,
    4842438.574733739
   ],
   "end_xy": [
    284228.5922832527,
    4842392.118462827
   ]
  },
  "max_100m": {
   "gradient_pct": 17.767071683860706,
   "start_distance_m": 203.0,
   "end_distance_m": 303.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 175.67897216143388,
   "end_elevation_m": 193.44604384529458,
   "start_xy": [
    284253.67924667336,
    4842460.581233906
   ],
   "end_xy": [
    284219.59608939016,
    4842366.693766065
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.513055377887667,
   "start_distance_m": 3201.0,
   "end_distance_m": 3206.0,
   "midpoint_distance_m": 3203.5,
   "start_elevation_m": 367.8145452033374,
   "end_elevation_m": 367.188892434443,
   "start_xy": [
    283609.884933131,
    4839936.498294987
   ],
   "end_xy": [
    283605.34913749114,
    4839934.394357093
   ]
  },
  "min_10m": {
   "gradient_pct": -12.426108098734403,
   "start_distance_m": 3196.0,
   "end_distance_m": 3206.0,
   "midpoint_distance_m": 3201.0,
   "start_elevation_m": 368.43150324431645,
   "end_elevation_m": 367.188892434443,
   "start_xy": [
    283614.42057659366,
    4839938.60256091
   ],
   "end_xy": [
    283605.34913749114,
    4839934.394357093
   ]
  },
  "min_20m": {
   "gradient_pct": -11.475085858048999,
   "start_distance_m": 3188.0,
   "end_distance_m": 3208.0,
   "midpoint_distance_m": 3198.0,
   "start_elevation_m": 369.26462743480863,
   "end_elevation_m": 366.96961026319883,
   "start_xy": [
    283621.67753440264,
    4839941.969541327
   ],
   "end_xy": [
    283603.53503771266,
    4839933.55231078
   ]
  },
  "min_25m": {
   "gradient_pct": -11.018083526324972,
   "start_distance_m": 3191.0,
   "end_distance_m": 3216.0,
   "midpoint_distance_m": 3203.5,
   "start_elevation_m": 368.9814041519328,
   "end_elevation_m": 366.22688327035155,
   "start_xy": [
    283618.9563579653,
    4839940.706529598
   ],
   "end_xy": [
    283596.27807990403,
    4839930.185330363
   ]
  },
  "min_50m": {
   "gradient_pct": -9.184369571940238,
   "start_distance_m": 3184.0,
   "end_distance_m": 3234.0,
   "midpoint_distance_m": 3209.0,
   "start_elevation_m": 369.54917404282793,
   "end_elevation_m": 364.9569892568578,
   "start_xy": [
    283625.30626584607,
    4839943.652486941
   ],
   "end_xy": [
    283580.351255499,
    4839921.836238156
   ]
  },
  "min_100m": {
   "gradient_pct": -7.053024219278257,
   "start_distance_m": 3781.0,
   "end_distance_m": 3881.0,
   "midpoint_distance_m": 3831.0,
   "start_elevation_m": 397.8832753441953,
   "end_elevation_m": 390.830251124917,
   "start_xy": [
    283156.81898886414,
    4839624.667572695
   ],
   "end_xy": [
    283057.700312384,
    4839611.433302044
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.22820991740997,
   "start_distance_m": 366.0,
   "end_distance_m": 368.0,
   "midpoint_distance_m": 367.0,
   "start_elevation_m": 204.07073943956877,
   "end_elevation_m": 204.53530363791697,
   "start_xy": [
    284215.091223089,
    4842304.407415272
   ],
   "end_xy": [
    284215.4393072494,
    4842302.437938848
   ]
  },
  "max_3m": {
   "gradient_pct": 20.974525523359944,
   "start_distance_m": 366.0,
   "end_distance_m": 369.0,
   "midpoint_distance_m": 367.5,
   "start_elevation_m": 204.07073943956877,
   "end_elevation_m": 204.69997520526957,
   "start_xy": [
    284215.091223089,
    4842304.407415272
   ],
   "end_xy": [
    284215.61325105943,
    4842301.453183274
   ]
  }
 },
 "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": 0.195,
   "obstruction_max_height_m": 26.3,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/nh/USGS_one_meter_x28y484_NH_CT_RiverNorthL6_2015.tif",
   "data/cache/usa/nh/USGS_one_meter_x28y485_NH_CT_RiverNorthL6_2015.tif"
  ],
  "calculated_at": "2026-09-03T13:13:58+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/bridgewater-hill-road-2/bridgewater-hill-road-2.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, NH_CT_RiverNorthL6_2015 (collected 2015)",
  "elevation_tile_ids": [
   "x28y484",
   "x28y485"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_CT_River_Lot6_Winnipesaulee_2015_LAS_2017",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.991,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Bridgewater",
  "county": "New Hampshire"
 }
}