{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.4894, -71.2154)",
 "slug": "discovered-lane-44-4894-71-2154",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.662938777600516,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 16.0,
   "end_distance_m": 18.0,
   "start_elevation_m": 324.9712472935015,
   "end_elevation_m": 325.6645060690535,
   "min_gradient_pct": -21.12571620159258
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.417828149901954,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 15.0,
   "end_distance_m": 18.0,
   "start_elevation_m": 324.78197122455646,
   "end_elevation_m": 325.6645060690535,
   "min_gradient_pct": -18.174443588831462
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.970643379646845,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 261.0,
   "end_distance_m": 266.0,
   "start_elevation_m": 347.2085196691602,
   "end_elevation_m": 348.6070518381425,
   "min_gradient_pct": -12.497463189370137
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.838452045810186,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 271.0,
   "end_distance_m": 281.0,
   "start_elevation_m": 349.82063476492453,
   "end_elevation_m": 352.50447996950555,
   "min_gradient_pct": -4.02837441815052
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.479801501726854,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 261.0,
   "end_distance_m": 281.0,
   "start_elevation_m": 347.2085196691602,
   "end_elevation_m": 352.50447996950555,
   "min_gradient_pct": 0.24186253660417378
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.312839459877523,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 260.0,
   "end_distance_m": 285.0,
   "start_elevation_m": 346.93852045950933,
   "end_elevation_m": 353.5167303244787,
   "min_gradient_pct": 0.6673845614454876
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 24.332130218382872,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 254.0,
   "end_distance_m": 304.0,
   "start_elevation_m": 345.56947035521597,
   "end_elevation_m": 357.7355354644074,
   "min_gradient_pct": 2.424505002844171
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.273685424436394,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 215.0,
   "end_distance_m": 315.0,
   "start_elevation_m": 337.27392603587913,
   "end_elevation_m": 359.5476114603155,
   "min_gradient_pct": 3.412085608018515
  }
 ],
 "shape": {
  "ascent_concentration": 0.453,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 200.0,
  "shape_class": "stepped"
 },
 "length_m": 718.4387274326314,
 "start_elevation_m": 324.91278643359203,
 "end_elevation_m": 402.43944238739306,
 "endpoint_gain_m": 77.52665595380103,
 "overall_gradient_pct": 10.790990657038428,
 "accumulated_ascent_m": 78.91383149960762,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.970643379646845,
   "start_distance_m": 261.0,
   "end_distance_m": 266.0,
   "midpoint_distance_m": 263.5,
   "start_elevation_m": 347.2085196691602,
   "end_elevation_m": 348.6070518381425,
   "start_xy": [
    323972.4288580065,
    4928609.567450737
   ],
   "end_xy": [
    323967.43716227676,
    4928609.855502368
   ]
  },
  "max_10m": {
   "gradient_pct": 26.838452045810186,
   "start_distance_m": 271.0,
   "end_distance_m": 281.0,
   "midpoint_distance_m": 276.0,
   "start_elevation_m": 349.82063476492453,
   "end_elevation_m": 352.50447996950555,
   "start_xy": [
    323962.4454665471,
    4928610.143553999
   ],
   "end_xy": [
    323952.4656534774,
    4928610.778301106
   ]
  },
  "max_20m": {
   "gradient_pct": 26.479801501726854,
   "start_distance_m": 261.0,
   "end_distance_m": 281.0,
   "midpoint_distance_m": 271.0,
   "start_elevation_m": 347.2085196691602,
   "end_elevation_m": 352.50447996950555,
   "start_xy": [
    323972.4288580065,
    4928609.567450737
   ],
   "end_xy": [
    323952.4656534774,
    4928610.778301106
   ]
  },
  "max_25m": {
   "gradient_pct": 26.312839459877523,
   "start_distance_m": 260.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 272.5,
   "start_elevation_m": 346.93852045950933,
   "end_elevation_m": 353.5167303244787,
   "start_xy": [
    323973.4271971524,
    4928609.50984041
   ],
   "end_xy": [
    323948.4739053928,
    4928611.035103031
   ]
  },
  "max_50m": {
   "gradient_pct": 24.332130218382872,
   "start_distance_m": 254.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 279.0,
   "start_elevation_m": 345.56947035521597,
   "end_elevation_m": 357.7355354644074,
   "start_xy": [
    323979.417232028,
    4928609.164178452
   ],
   "end_xy": [
    323929.5131019911,
    4928612.254912181
   ]
  },
  "max_100m": {
   "gradient_pct": 22.273685424436394,
   "start_distance_m": 215.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 265.0,
   "start_elevation_m": 337.27392603587913,
   "end_elevation_m": 359.5476114603155,
   "start_xy": [
    324018.3524587194,
    4928606.917375727
   ],
   "end_xy": [
    323918.53579475847,
    4928612.961117477
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.497463189370137,
   "start_distance_m": 19.0,
   "end_distance_m": 24.0,
   "midpoint_distance_m": 21.5,
   "start_elevation_m": 325.7130892907942,
   "end_elevation_m": 325.0882161313257,
   "start_xy": [
    324213.4868917674,
    4928589.9031185815
   ],
   "end_xy": [
    324208.4881790746,
    4928590.01657084
   ]
  },
  "min_10m": {
   "gradient_pct": -4.02837441815052,
   "start_distance_m": 18.0,
   "end_distance_m": 28.0,
   "midpoint_distance_m": 23.0,
   "start_elevation_m": 325.6645060690535,
   "end_elevation_m": 325.26166862723846,
   "start_xy": [
    324214.48663430597,
    4928589.88042813
   ],
   "end_xy": [
    324204.4892089204,
    4928590.107332647
   ]
  },
  "min_20m": {
   "gradient_pct": 0.24186253660417378,
   "start_distance_m": 18.0,
   "end_distance_m": 38.0,
   "midpoint_distance_m": 28.0,
   "start_elevation_m": 325.6645060690535,
   "end_elevation_m": 325.71287857637435,
   "start_xy": [
    324214.48663430597,
    4928589.88042813
   ],
   "end_xy": [
    324194.4917835348,
    4928590.334237163
   ]
  },
  "min_25m": {
   "gradient_pct": 0.6673845614454876,
   "start_distance_m": 1.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 13.5,
   "start_elevation_m": 324.9168245606794,
   "end_elevation_m": 325.0836707010408,
   "start_xy": [
    324231.48225746147,
    4928589.494690452
   ],
   "end_xy": [
    324206.4886939975,
    4928590.061951743
   ]
  },
  "min_50m": {
   "gradient_pct": 2.424505002844171,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 324.91278643359203,
   "end_elevation_m": 326.1250389350141,
   "start_xy": [
    324232.482,
    4928589.472
   ],
   "end_xy": [
    324182.5001410433,
    4928590.704132226
   ]
  },
  "min_100m": {
   "gradient_pct": 3.412085608018515,
   "start_distance_m": 19.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 69.0,
   "start_elevation_m": 325.7130892907942,
   "end_elevation_m": 329.1251748988127,
   "start_xy": [
    324213.4868917674,
    4928589.9031185815
   ],
   "end_xy": [
    324113.9930276655,
    4928598.800196013
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.662938777600516,
   "start_distance_m": 16.0,
   "end_distance_m": 18.0,
   "midpoint_distance_m": 17.0,
   "start_elevation_m": 324.9712472935015,
   "end_elevation_m": 325.6645060690535,
   "start_xy": [
    324216.4861193831,
    4928589.835047226
   ],
   "end_xy": [
    324214.48663430597,
    4928589.88042813
   ]
  },
  "max_3m": {
   "gradient_pct": 29.417828149901954,
   "start_distance_m": 15.0,
   "end_distance_m": 18.0,
   "midpoint_distance_m": 16.5,
   "start_elevation_m": 324.78197122455646,
   "end_elevation_m": 325.6645060690535,
   "start_xy": [
    324217.4858619216,
    4928589.812356775
   ],
   "end_xy": [
    324214.48663430597,
    4928589.88042813
   ]
  }
 },
 "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": 0.022,
   "obstruction_max_height_m": 18.65,
   "flagged_windows_m": []
  },
  "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/nh/USGS_1M_19_x32y493_NH_Umbagog_LiDAR_2016_D16.tif"
  ],
  "calculated_at": "2026-08-24T20:21:22+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 18.0% over 200 m (Terrain 50), gain 78.2 m over 718 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): clean-steep,qualified-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": 0.992,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Berlin",
  "county": "New Hampshire"
 }
}