{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.6468, -71.5230)",
 "slug": "discovered-lane-44-6468-71-5230",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.05733374596616,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 197.0,
   "end_distance_m": 199.0,
   "start_elevation_m": 448.5531544576003,
   "end_elevation_m": 449.3543011325196,
   "min_gradient_pct": -38.30663892867108
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.55878797557443,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 196.0,
   "end_distance_m": 199.0,
   "start_elevation_m": 448.37753749325236,
   "end_elevation_m": 449.3543011325196,
   "min_gradient_pct": -37.87642643421236
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.559705895097295,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 175.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 444.44152441987484,
   "end_elevation_m": 445.8195097146297,
   "min_gradient_pct": -37.565606714671276
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.543701076998445,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 172.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 443.8468121064803,
   "end_elevation_m": 446.30118221418013,
   "min_gradient_pct": -34.696136150318466
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.06226121774779,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 441.4887299706306,
   "end_elevation_m": 446.30118221418013,
   "min_gradient_pct": -28.65100095399498
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.35133191110299,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 157.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 440.4633492364044,
   "end_elevation_m": 446.30118221418013,
   "min_gradient_pct": -27.463367579659007
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.442383828906372,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 152.0,
   "end_distance_m": 202.0,
   "start_elevation_m": 439.6524414727509,
   "end_elevation_m": 449.8736333872041,
   "min_gradient_pct": -19.263685083123733
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.222172933513718,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 117.0,
   "end_distance_m": 217.0,
   "start_elevation_m": 436.053612710156,
   "end_elevation_m": 451.27578564366974,
   "min_gradient_pct": -15.491724034507342
  }
 ],
 "shape": {
  "ascent_concentration": 0.477,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 80.0,
  "shape_class": "stepped"
 },
 "length_m": 917.8788810270098,
 "start_elevation_m": 422.35010278196324,
 "end_elevation_m": 448.0845085553146,
 "endpoint_gain_m": 25.73440577335134,
 "overall_gradient_pct": 2.803682087614572,
 "accumulated_ascent_m": 63.16863216242223,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.559705895097295,
   "start_distance_m": 175.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 177.5,
   "start_elevation_m": 444.44152441987484,
   "end_elevation_m": 445.8195097146297,
   "start_xy": [
    299690.241189247,
    4946815.235428072
   ],
   "end_xy": [
    299695.06886378676,
    4946816.528036093
   ]
  },
  "max_10m": {
   "gradient_pct": 24.543701076998445,
   "start_distance_m": 172.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 443.8468121064803,
   "end_elevation_m": 446.30118221418013,
   "start_xy": [
    299687.36134610884,
    4946814.394890446
   ],
   "end_xy": [
    299697.0202359875,
    4946816.966381316
   ]
  },
  "max_20m": {
   "gradient_pct": 24.06226121774779,
   "start_distance_m": 162.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 172.0,
   "start_elevation_m": 441.4887299706306,
   "end_elevation_m": 446.30118221418013,
   "start_xy": [
    299677.76186898164,
    4946811.593098362
   ],
   "end_xy": [
    299697.0202359875,
    4946816.966381316
   ]
  },
  "max_25m": {
   "gradient_pct": 23.35133191110299,
   "start_distance_m": 157.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 169.5,
   "start_elevation_m": 440.4633492364044,
   "end_elevation_m": 446.30118221418013,
   "start_xy": [
    299672.96213041805,
    4946810.192202319
   ],
   "end_xy": [
    299697.0202359875,
    4946816.966381316
   ]
  },
  "max_50m": {
   "gradient_pct": 20.442383828906372,
   "start_distance_m": 152.0,
   "end_distance_m": 202.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 439.6524414727509,
   "end_elevation_m": 449.8736333872041,
   "start_xy": [
    299668.1623918545,
    4946808.791306278
   ],
   "end_xy": [
    299716.4322862623,
    4946816.414917751
   ]
  },
  "max_100m": {
   "gradient_pct": 15.222172933513718,
   "start_distance_m": 117.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 167.0,
   "start_elevation_m": 436.053612710156,
   "end_elevation_m": 451.27578564366974,
   "start_xy": [
    299634.5642219094,
    4946798.9850339815
   ],
   "end_xy": [
    299730.4177299481,
    4946810.992061962
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -37.565606714671276,
   "start_distance_m": 563.0,
   "end_distance_m": 568.0,
   "midpoint_distance_m": 565.5,
   "start_elevation_m": 470.7729258532241,
   "end_elevation_m": 468.8946455174905,
   "start_xy": [
    300063.5329919886,
    4946769.853282473
   ],
   "end_xy": [
    300067.7695992684,
    4946767.197880666
   ]
  },
  "min_10m": {
   "gradient_pct": -34.696136150318466,
   "start_distance_m": 563.0,
   "end_distance_m": 573.0,
   "midpoint_distance_m": 568.0,
   "start_elevation_m": 470.7729258532241,
   "end_elevation_m": 467.30331223819223,
   "start_xy": [
    300063.5329919886,
    4946769.853282473
   ],
   "end_xy": [
    300072.0337091449,
    4946764.5963932285
   ]
  },
  "min_20m": {
   "gradient_pct": -28.65100095399498,
   "start_distance_m": 552.0,
   "end_distance_m": 572.0,
   "midpoint_distance_m": 562.0,
   "start_elevation_m": 473.30057847399894,
   "end_elevation_m": 467.57037828319994,
   "start_xy": [
    300053.83335471177,
    4946775.004050867
   ],
   "end_xy": [
    300071.15888509224,
    4946765.07355922
   ]
  },
  "min_25m": {
   "gradient_pct": -27.463367579659007,
   "start_distance_m": 549.0,
   "end_distance_m": 574.0,
   "midpoint_distance_m": 561.5,
   "start_elevation_m": 473.91017019338017,
   "end_elevation_m": 467.0443282984654,
   "start_xy": [
    300051.1236669928,
    4946776.291526096
   ],
   "end_xy": [
    300072.9610546953,
    4946764.222187095
   ]
  },
  "min_50m": {
   "gradient_pct": -19.263685083123733,
   "start_distance_m": 758.0,
   "end_distance_m": 808.0,
   "midpoint_distance_m": 783.0,
   "start_elevation_m": 464.1286781392357,
   "end_elevation_m": 454.49683559767385,
   "start_xy": [
    300167.93136159383,
    4946893.60597952
   ],
   "end_xy": [
    300184.3819916173,
    4946940.808240101
   ]
  },
  "min_100m": {
   "gradient_pct": -15.491724034507342,
   "start_distance_m": 747.0,
   "end_distance_m": 847.0,
   "midpoint_distance_m": 797.0,
   "start_elevation_m": 465.5623437254666,
   "end_elevation_m": 450.07061969095923,
   "start_xy": [
    300165.40989353415,
    4946882.9823129065
   ],
   "end_xy": [
    300198.7362071661,
    4946977.068595056
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.05733374596616,
   "start_distance_m": 197.0,
   "end_distance_m": 199.0,
   "midpoint_distance_m": 198.0,
   "start_elevation_m": 448.5531544576003,
   "end_elevation_m": 449.3543011325196,
   "start_xy": [
    299711.7704717003,
    4946818.222536348
   ],
   "end_xy": [
    299713.6351975251,
    4946817.49948891
   ]
  },
  "max_3m": {
   "gradient_pct": 32.55878797557443,
   "start_distance_m": 196.0,
   "end_distance_m": 199.0,
   "midpoint_distance_m": 197.5,
   "start_elevation_m": 448.37753749325236,
   "end_elevation_m": 449.3543011325196,
   "start_xy": [
    299710.8381087879,
    4946818.584060067
   ],
   "end_xy": [
    299713.6351975251,
    4946817.49948891
   ]
  }
 },
 "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": [
   "may_start_earlier"
  ],
  "suggested_summit_cut_m": 529.0,
  "trailing_descent_m": 26.6
 },
 "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_x29y495_NH_CT_RiverNorthL6_2015.tif",
   "data/cache/usa/nh/USGS_one_meter_x30y495_NH_CT_RiverNorthL6_2015.tif"
  ],
  "calculated_at": "2026-08-24T20:54:36+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_CT_RiverNorthL6_2015 (collected 2015)",
  "elevation_tile_ids": [
   "x29y495",
   "x30y495"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.5% over 200 m (Terrain 50), gain 25.6 m over 918 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Stratford",
  "county": "New Hampshire"
 }
}