{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.4473, -71.1564)",
 "slug": "discovered-lane-44-4473-71-1564",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.74951579726735,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 791.0,
   "end_distance_m": 793.0,
   "start_elevation_m": 556.3216549577525,
   "end_elevation_m": 557.0166452736978,
   "min_gradient_pct": -15.116968674743703
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.841276981891497,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 792.0,
   "end_distance_m": 795.0,
   "start_elevation_m": 556.5682915671175,
   "end_elevation_m": 557.4935298765743,
   "min_gradient_pct": -13.975427292272494
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.09785806832315,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 790.0,
   "end_distance_m": 795.0,
   "start_elevation_m": 556.1386369731581,
   "end_elevation_m": 557.4935298765743,
   "min_gradient_pct": -13.376254630175026
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.843632459014543,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 730.0,
   "end_distance_m": 740.0,
   "start_elevation_m": 544.4289037117877,
   "end_elevation_m": 546.8132669576892,
   "min_gradient_pct": -11.833597615955114
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.120592197385008,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 723.0,
   "end_distance_m": 743.0,
   "start_elevation_m": 542.8513184191562,
   "end_elevation_m": 547.4754368586332,
   "min_gradient_pct": -9.83440158741729
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.806652555023902,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 725.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 543.3099949743529,
   "end_elevation_m": 549.0116581131089,
   "min_gradient_pct": -9.388896558614078
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.778122186980227,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 711.0,
   "end_distance_m": 761.0,
   "start_elevation_m": 540.3209433455597,
   "end_elevation_m": 551.2100044390498,
   "min_gradient_pct": -6.532816784804368
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.195897946265063,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 695.0,
   "end_distance_m": 795.0,
   "start_elevation_m": 537.2976319303092,
   "end_elevation_m": 557.4935298765743,
   "min_gradient_pct": -1.8306801673437576
  }
 ],
 "shape": {
  "ascent_concentration": 0.419,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 359.0,
  "shape_class": "sustained"
 },
 "length_m": 1075.8701735820175,
 "start_elevation_m": 480.9712783775249,
 "end_elevation_m": 591.4769981454605,
 "endpoint_gain_m": 110.50571976793555,
 "overall_gradient_pct": 10.271287603411873,
 "accumulated_ascent_m": 116.35738026687892,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.09785806832315,
   "start_distance_m": 790.0,
   "end_distance_m": 795.0,
   "midpoint_distance_m": 792.5,
   "start_elevation_m": 556.1386369731581,
   "end_elevation_m": 557.4935298765743,
   "start_xy": [
    328349.79107069294,
    4923845.6451991685
   ],
   "end_xy": [
    328354.36173680885,
    4923843.618129546
   ]
  },
  "max_10m": {
   "gradient_pct": 23.843632459014543,
   "start_distance_m": 730.0,
   "end_distance_m": 740.0,
   "midpoint_distance_m": 735.0,
   "start_elevation_m": 544.4289037117877,
   "end_elevation_m": 546.8132669576892,
   "start_xy": [
    328294.9430773023,
    4923869.970034647
   ],
   "end_xy": [
    328304.0844095341,
    4923865.915895401
   ]
  },
  "max_20m": {
   "gradient_pct": 23.120592197385008,
   "start_distance_m": 723.0,
   "end_distance_m": 743.0,
   "midpoint_distance_m": 733.0,
   "start_elevation_m": 542.8513184191562,
   "end_elevation_m": 547.4754368586332,
   "start_xy": [
    328288.5441447401,
    4923872.807932119
   ],
   "end_xy": [
    328306.82680920366,
    4923864.699653626
   ]
  },
  "max_25m": {
   "gradient_pct": 22.806652555023902,
   "start_distance_m": 725.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 737.5,
   "start_elevation_m": 543.3099949743529,
   "end_elevation_m": 549.0116581131089,
   "start_xy": [
    328290.37241118646,
    4923871.997104269
   ],
   "end_xy": [
    328313.22574176587,
    4923861.861756154
   ]
  },
  "max_50m": {
   "gradient_pct": 21.778122186980227,
   "start_distance_m": 711.0,
   "end_distance_m": 761.0,
   "midpoint_distance_m": 736.0,
   "start_elevation_m": 540.3209433455597,
   "end_elevation_m": 551.2100044390498,
   "start_xy": [
    328277.60781653435,
    4923877.745231748
   ],
   "end_xy": [
    328323.2812072208,
    4923857.402202983
   ]
  },
  "max_100m": {
   "gradient_pct": 20.195897946265063,
   "start_distance_m": 695.0,
   "end_distance_m": 795.0,
   "midpoint_distance_m": 745.0,
   "start_elevation_m": 537.2976319303092,
   "end_elevation_m": 557.4935298765743,
   "start_xy": [
    328263.1645929624,
    4923884.629510421
   ],
   "end_xy": [
    328354.36173680885,
    4923843.618129546
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.376254630175026,
   "start_distance_m": 1011.0,
   "end_distance_m": 1016.0,
   "midpoint_distance_m": 1013.5,
   "start_elevation_m": 585.0695773005272,
   "end_elevation_m": 584.4007645690184,
   "start_xy": [
    328453.8547835148,
    4923691.021271442
   ],
   "end_xy": [
    328452.0890327143,
    4923686.343438172
   ]
  },
  "min_10m": {
   "gradient_pct": -11.833597615955114,
   "start_distance_m": 1006.0,
   "end_distance_m": 1016.0,
   "midpoint_distance_m": 1011.0,
   "start_elevation_m": 585.5841243306139,
   "end_elevation_m": 584.4007645690184,
   "start_xy": [
    328455.62053431524,
    4923695.699104713
   ],
   "end_xy": [
    328452.0890327143,
    4923686.343438172
   ]
  },
  "min_20m": {
   "gradient_pct": -9.83440158741729,
   "start_distance_m": 7.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 17.0,
   "start_elevation_m": 480.4830102110641,
   "end_elevation_m": 478.5161298935806,
   "start_xy": [
    328191.981885246,
    4924474.531797873
   ],
   "end_xy": [
    328184.2872716632,
    4924456.071220368
   ]
  },
  "min_25m": {
   "gradient_pct": -9.388896558614078,
   "start_distance_m": 2.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 14.5,
   "start_elevation_m": 480.86335403323415,
   "end_elevation_m": 478.5161298935806,
   "start_xy": [
    328193.90553864173,
    4924479.1469422495
   ],
   "end_xy": [
    328184.2872716632,
    4924456.071220368
   ]
  },
  "min_50m": {
   "gradient_pct": -6.532816784804368,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 480.9712783775249,
   "end_elevation_m": 477.70486998512274,
   "start_xy": [
    328194.675,
    4924480.993
   ],
   "end_xy": [
    328175.3672873037,
    4924434.9141501095
   ]
  },
  "min_100m": {
   "gradient_pct": -1.8306801673437576,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 480.9712783775249,
   "end_elevation_m": 479.14059821018117,
   "start_xy": [
    328194.675,
    4924480.993
   ],
   "end_xy": [
    328186.2301539174,
    4924386.77600816
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.74951579726735,
   "start_distance_m": 791.0,
   "end_distance_m": 793.0,
   "midpoint_distance_m": 792.0,
   "start_elevation_m": 556.3216549577525,
   "end_elevation_m": 557.0166452736978,
   "start_xy": [
    328350.7052039161,
    4923845.239785244
   ],
   "end_xy": [
    328352.5334703625,
    4923844.428957395
   ]
  },
  "max_3m": {
   "gradient_pct": 30.841276981891497,
   "start_distance_m": 792.0,
   "end_distance_m": 795.0,
   "midpoint_distance_m": 793.5,
   "start_elevation_m": 556.5682915671175,
   "end_elevation_m": 557.4935298765743,
   "start_xy": [
    328351.6193371393,
    4923844.83437132
   ],
   "end_xy": [
    328354.36173680885,
    4923843.618129546
   ]
  }
 },
 "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": 0.053,
   "obstruction_max_height_m": 10.97,
   "flagged_windows_m": [
    2
   ]
  },
  "review": [],
  "extent": [
   "descends_at_start",
   "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_1M_19_x32y493_NH_Umbagog_LiDAR_2016_D16.tif"
  ],
  "calculated_at": "2026-08-24T20:19:24+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": "redo-nh-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, NH_Umbagog_LiDAR_2016_D16 (collected 2016)",
  "elevation_tile_ids": [
   "x32y493"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 18.9% over 200 m (Terrain 50), gain 78.8 m over 577 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): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/NH_Umbagog_2016",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.993,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Success",
  "county": "New Hampshire"
 }
}