{
 "ocl_version": "0.1.0",
 "name": "Harriman Lane",
 "slug": "harriman-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.04282611716667,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 761.0,
   "end_distance_m": 763.0,
   "start_elevation_m": 269.0508800333933,
   "end_elevation_m": 269.73173655573663,
   "min_gradient_pct": -25.834991736600443,
   "suppressed_max_gradient_pct": 35.83038880800444,
   "suppressed_location_m": [
    286.0,
    288.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.374466257805505,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 760.0,
   "end_distance_m": 763.0,
   "start_elevation_m": 268.79050256800247,
   "end_elevation_m": 269.73173655573663,
   "min_gradient_pct": -24.193196646265847,
   "suppressed_max_gradient_pct": 34.475735339897064,
   "suppressed_location_m": [
    286.0,
    289.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.869219041953784,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 759.0,
   "end_distance_m": 764.0,
   "start_elevation_m": 268.59108753650145,
   "end_elevation_m": 269.88454848859914,
   "min_gradient_pct": -24.32789480792735,
   "suppressed_max_gradient_pct": 33.32115189865419,
   "suppressed_location_m": [
    286.0,
    291.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.54705386460472,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5.0,
   "end_distance_m": 15.0,
   "start_elevation_m": 204.4446601423114,
   "end_elevation_m": 206.69936552877186,
   "min_gradient_pct": -22.799272505862973,
   "suppressed_max_gradient_pct": 32.242056835079325,
   "suppressed_location_m": [
    283.0,
    293.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.229116994486304,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5.0,
   "end_distance_m": 25.0,
   "start_elevation_m": 204.4446601423114,
   "end_elevation_m": 208.89048354120865,
   "min_gradient_pct": -18.979182090601796,
   "suppressed_max_gradient_pct": 30.185277392484977,
   "suppressed_location_m": [
    274.0,
    294.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.98972180409112,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 3.0,
   "end_distance_m": 28.0,
   "start_elevation_m": 204.03089694921914,
   "end_elevation_m": 209.52832740024192,
   "min_gradient_pct": -18.161364619472465,
   "suppressed_max_gradient_pct": 28.903330144065308,
   "suppressed_location_m": [
    269.0,
    294.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.73989682117832,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2.0,
   "end_distance_m": 52.0,
   "start_elevation_m": 203.9028930627922,
   "end_elevation_m": 213.77284147338136,
   "min_gradient_pct": -11.315569990940105,
   "suppressed_max_gradient_pct": 23.514944604887773,
   "suppressed_location_m": [
    267.0,
    317.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.370698137305112,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 664.0,
   "end_distance_m": 764.0,
   "start_elevation_m": 253.51385035129402,
   "end_elevation_m": 269.88454848859914,
   "min_gradient_pct": -4.230212175775563,
   "suppressed_max_gradient_pct": 19.925747045484314,
   "suppressed_location_m": [
    231.0,
    331.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.354,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 121.0,
  "shape_class": "sustained"
 },
 "length_m": 839.0732874835965,
 "start_elevation_m": 203.5741778178862,
 "end_elevation_m": 276.8670741386746,
 "endpoint_gain_m": 73.29289632078837,
 "overall_gradient_pct": 8.734981486610753,
 "accumulated_ascent_m": 84.63423781163164,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.869219041953784,
   "start_distance_m": 759.0,
   "end_distance_m": 764.0,
   "midpoint_distance_m": 761.5,
   "start_elevation_m": 268.59108753650145,
   "end_elevation_m": 269.88454848859914,
   "start_xy": [
    271068.58559523756,
    4793925.288169161
   ],
   "end_xy": [
    271064.1948190189,
    4793922.896290992
   ]
  },
  "max_10m": {
   "gradient_pct": 22.54705386460472,
   "start_distance_m": 5.0,
   "end_distance_m": 15.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 204.4446601423114,
   "end_elevation_m": 206.69936552877186,
   "start_xy": [
    271800.45414028777,
    4794096.41003453
   ],
   "end_xy": [
    271790.744188328,
    4794094.019046355
   ]
  },
  "max_20m": {
   "gradient_pct": 22.229116994486304,
   "start_distance_m": 5.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 15.0,
   "start_elevation_m": 204.4446601423114,
   "end_elevation_m": 208.89048354120865,
   "start_xy": [
    271800.45414028777,
    4794096.41003453
   ],
   "end_xy": [
    271781.03446879145,
    4794091.627115871
   ]
  },
  "max_25m": {
   "gradient_pct": 21.98972180409112,
   "start_distance_m": 3.0,
   "end_distance_m": 28.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 204.03089694921914,
   "end_elevation_m": 209.52832740024192,
   "start_xy": [
    271802.3959446645,
    4794096.888986323
   ],
   "end_xy": [
    271778.12141355517,
    4794090.910101792
   ]
  },
  "max_50m": {
   "gradient_pct": 19.73989682117832,
   "start_distance_m": 2.0,
   "end_distance_m": 52.0,
   "midpoint_distance_m": 27.0,
   "start_elevation_m": 203.9028930627922,
   "end_elevation_m": 213.77284147338136,
   "start_xy": [
    271803.36696310097,
    4794097.127990917
   ],
   "end_xy": [
    271754.8892526627,
    4794084.888065515
   ]
  },
  "max_100m": {
   "gradient_pct": 16.370698137305112,
   "start_distance_m": 664.0,
   "end_distance_m": 764.0,
   "midpoint_distance_m": 714.0,
   "start_elevation_m": 253.51385035129402,
   "end_elevation_m": 269.88454848859914,
   "start_xy": [
    271158.0884612358,
    4793951.762253309
   ],
   "end_xy": [
    271064.1948190189,
    4793922.896290992
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -24.32789480792735,
   "start_distance_m": 528.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 530.5,
   "start_elevation_m": 247.03528200157717,
   "end_elevation_m": 245.8188872611808,
   "start_xy": [
    271290.3041427651,
    4793983.544057942
   ],
   "end_xy": [
    271285.4204485753,
    4793982.4718981
   ]
  },
  "min_10m": {
   "gradient_pct": -22.799272505862973,
   "start_distance_m": 527.0,
   "end_distance_m": 537.0,
   "midpoint_distance_m": 532.0,
   "start_elevation_m": 247.25749307931105,
   "end_elevation_m": 244.97756582872475,
   "start_xy": [
    271291.2807761274,
    4793983.758970181
   ],
   "end_xy": [
    271281.51354820456,
    4793981.613920025
   ]
  },
  "min_20m": {
   "gradient_pct": -18.979182090601796,
   "start_distance_m": 520.0,
   "end_distance_m": 540.0,
   "midpoint_distance_m": 530.0,
   "start_elevation_m": 248.27628787351765,
   "end_elevation_m": 244.4804514553973,
   "start_xy": [
    271298.11794263864,
    4793985.260016095
   ],
   "end_xy": [
    271278.5834873097,
    4793980.96991636
   ]
  },
  "min_25m": {
   "gradient_pct": -18.161364619472465,
   "start_distance_m": 520.0,
   "end_distance_m": 545.0,
   "midpoint_distance_m": 532.5,
   "start_elevation_m": 248.27628787351765,
   "end_elevation_m": 243.73594671864953,
   "start_xy": [
    271298.11794263864,
    4793985.260016095
   ],
   "end_xy": [
    271273.6997478726,
    4793979.897963964
   ]
  },
  "min_50m": {
   "gradient_pct": -11.315569990940105,
   "start_distance_m": 505.0,
   "end_distance_m": 555.0,
   "midpoint_distance_m": 530.0,
   "start_elevation_m": 248.66476948991675,
   "end_elevation_m": 243.0069844944467,
   "start_xy": [
    271312.76891162153,
    4793988.477009301
   ],
   "end_xy": [
    271263.93251995,
    4793977.752913807
   ]
  },
  "min_100m": {
   "gradient_pct": -4.230212175775563,
   "start_distance_m": 469.0,
   "end_distance_m": 569.0,
   "midpoint_distance_m": 519.0,
   "start_elevation_m": 247.69247198516868,
   "end_elevation_m": 243.46225980939312,
   "start_xy": [
    271347.9309681431,
    4793996.199021681
   ],
   "end_xy": [
    271250.31300138606,
    4793974.514794366
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.04282611716667,
   "start_distance_m": 761.0,
   "end_distance_m": 763.0,
   "midpoint_distance_m": 762.0,
   "start_elevation_m": 269.0508800333933,
   "end_elevation_m": 269.73173655573663,
   "start_xy": [
    271066.8292314697,
    4793924.331515538
   ],
   "end_xy": [
    271065.0726884266,
    4793923.375191066
   ]
  },
  "max_3m": {
   "gradient_pct": 31.374466257805505,
   "start_distance_m": 760.0,
   "end_distance_m": 763.0,
   "midpoint_distance_m": 761.5,
   "start_elevation_m": 268.79050256800247,
   "end_elevation_m": 269.73173655573663,
   "start_xy": [
    271067.7073232488,
    4793924.810007777
   ],
   "end_xy": [
    271065.0726884266,
    4793923.375191066
   ]
  }
 },
 "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": {
  "texture_suppression": {
   "masked_fraction": 0.036,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 269.0,
     "end_m": 294.0,
     "raw_pct": 28.9,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 274.0,
     "end_m": 294.0,
     "raw_pct": 30.19,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 283.0,
     "end_m": 293.0,
     "raw_pct": 32.24,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.658,
   "obstruction_max_height_m": 33.92,
   "flagged_windows_m": [
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    267.0,
    296.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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_x27y480_NH_CT_RiverNorthL6_2015.tif"
  ],
  "calculated_at": "2026-09-12T00:52:47+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-hampshire-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "texture-us-nh-260911",
  "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": [
   "x27y480"
  ],
  "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": 0.995,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Warner",
  "county": "New Hampshire"
 }
}