{
 "ocl_version": "0.1.0",
 "name": "Lovers Leap Road",
 "slug": "lovers-leap-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 36.9628822533457,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 387.0,
   "end_distance_m": 389.0,
   "start_elevation_m": 304.599436213503,
   "end_elevation_m": 305.3386938585699,
   "min_gradient_pct": -228.34911966871516,
   "suppressed_max_gradient_pct": 185.93837963966848,
   "suppressed_location_m": [
    321.0,
    323.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.729383887466305,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 387.0,
   "end_distance_m": 390.0,
   "start_elevation_m": 304.599436213503,
   "end_elevation_m": 305.671317730127,
   "min_gradient_pct": -205.79821621909863,
   "suppressed_max_gradient_pct": 177.38340813407186,
   "suppressed_location_m": [
    320.0,
    323.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.21224259067344,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 386.0,
   "end_distance_m": 391.0,
   "start_elevation_m": 304.2703704660274,
   "end_elevation_m": 305.98098259556104,
   "min_gradient_pct": -164.17131926365528,
   "suppressed_max_gradient_pct": 155.80199997895193,
   "suppressed_location_m": [
    319.0,
    324.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.893182065276505,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 386.0,
   "end_distance_m": 396.0,
   "start_elevation_m": 304.2703704660274,
   "end_elevation_m": 307.359688672555,
   "min_gradient_pct": -110.98206730956917,
   "suppressed_max_gradient_pct": 106.00447556671554,
   "suppressed_location_m": [
    315.0,
    325.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.983216028130812,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 384.0,
   "end_distance_m": 404.0,
   "start_elevation_m": 303.76234240952977,
   "end_elevation_m": 309.1589856151559,
   "min_gradient_pct": -62.52686139112427,
   "suppressed_max_gradient_pct": 65.09796740918745,
   "suppressed_location_m": [
    313.0,
    333.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.798283748296853,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 384.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 303.76234240952977,
   "end_elevation_m": 310.211913346604,
   "min_gradient_pct": -48.23487358517332,
   "suppressed_max_gradient_pct": 53.74734000870467,
   "suppressed_location_m": [
    313.0,
    338.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.429731495198894,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 372.0,
   "end_distance_m": 422.0,
   "start_elevation_m": 302.38616093152984,
   "end_elevation_m": 312.1010266791293,
   "min_gradient_pct": -21.8665460354282,
   "suppressed_max_gradient_pct": 31.744838176604958,
   "suppressed_location_m": [
    313.0,
    363.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.12517128729229,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 330.0,
   "end_distance_m": 430.0,
   "start_elevation_m": 298.39571798858094,
   "end_elevation_m": 312.52088927587323,
   "min_gradient_pct": -3.8928088281151645,
   "suppressed_max_gradient_pct": 25.316922163138543,
   "suppressed_location_m": [
    313.0,
    413.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.457,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 81.0,
  "shape_class": "stepped"
 },
 "length_m": 441.99999999982674,
 "start_elevation_m": 267.7882644777997,
 "end_elevation_m": 312.756779483795,
 "endpoint_gain_m": 44.9685150059953,
 "overall_gradient_pct": 10.173872173306092,
 "accumulated_ascent_m": 58.28933210447042,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.21224259067344,
   "start_distance_m": 386.0,
   "end_distance_m": 391.0,
   "midpoint_distance_m": 388.5,
   "start_elevation_m": 304.2703704660274,
   "end_elevation_m": 305.98098259556104,
   "start_xy": [
    597995.4687869931,
    4404305.085912855
   ],
   "end_xy": [
    597997.7196416806,
    4404309.550624491
   ]
  },
  "max_10m": {
   "gradient_pct": 30.893182065276505,
   "start_distance_m": 386.0,
   "end_distance_m": 396.0,
   "midpoint_distance_m": 391.0,
   "start_elevation_m": 304.2703704660274,
   "end_elevation_m": 307.359688672555,
   "start_xy": [
    597995.4687869931,
    4404305.085912855
   ],
   "end_xy": [
    597999.9705915484,
    4404314.015288136
   ]
  },
  "max_20m": {
   "gradient_pct": 26.983216028130812,
   "start_distance_m": 384.0,
   "end_distance_m": 404.0,
   "midpoint_distance_m": 394.0,
   "start_elevation_m": 303.76234240952977,
   "end_elevation_m": 309.1589856151559,
   "start_xy": [
    597994.609449466,
    4404303.280933276
   ],
   "end_xy": [
    598003.5725846172,
    4404321.158511251
   ]
  },
  "max_25m": {
   "gradient_pct": 25.798283748296853,
   "start_distance_m": 384.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 396.5,
   "start_elevation_m": 303.76234240952977,
   "end_elevation_m": 310.211913346604,
   "start_xy": [
    597994.609449466,
    4404303.280933276
   ],
   "end_xy": [
    598005.8238411293,
    4404325.623020286
   ]
  },
  "max_50m": {
   "gradient_pct": 19.429731495198894,
   "start_distance_m": 372.0,
   "end_distance_m": 422.0,
   "midpoint_distance_m": 397.0,
   "start_elevation_m": 302.38616093152984,
   "end_elevation_m": 312.1010266791293,
   "start_xy": [
    597991.2252775386,
    4404291.769808704
   ],
   "end_xy": [
    598009.4266716707,
    4404338.073339921
   ]
  },
  "max_100m": {
   "gradient_pct": 14.12517128729229,
   "start_distance_m": 330.0,
   "end_distance_m": 430.0,
   "midpoint_distance_m": 380.0,
   "start_elevation_m": 298.39571798858094,
   "end_elevation_m": 312.52088927587323,
   "start_xy": [
    597974.8869954901,
    4404253.537840844
   ],
   "end_xy": [
    598010.1622312901,
    4404346.039436236
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -164.17131926365528,
   "start_distance_m": 303.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 305.5,
   "start_elevation_m": 296.5898934471787,
   "end_elevation_m": 288.38132748399596,
   "start_xy": [
    597974.0340264045,
    4404238.868937098
   ],
   "end_xy": [
    597969.0580936824,
    4404239.358930472
   ]
  },
  "min_10m": {
   "gradient_pct": -110.98206730956917,
   "start_distance_m": 302.0,
   "end_distance_m": 312.0,
   "midpoint_distance_m": 307.0,
   "start_elevation_m": 297.0366439621476,
   "end_elevation_m": 285.9384372311907,
   "start_xy": [
    597975.0292110284,
    4404238.770918914
   ],
   "end_xy": [
    597965.0781007063,
    4404239.755074867
   ]
  },
  "min_20m": {
   "gradient_pct": -62.52686139112427,
   "start_distance_m": 293.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 303.0,
   "start_elevation_m": 298.08888036693594,
   "end_elevation_m": 285.5835080887111,
   "start_xy": [
    597983.8979351273,
    4404237.300768341
   ],
   "end_xy": [
    597964.4623326673,
    4404240.109275378
   ]
  },
  "min_25m": {
   "gradient_pct": -48.23487358517332,
   "start_distance_m": 288.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 300.5,
   "start_elevation_m": 297.6422264850044,
   "end_elevation_m": 285.5835080887111,
   "start_xy": [
    597988.7971508725,
    4404236.301928394
   ],
   "end_xy": [
    597964.4623326673,
    4404240.109275378
   ]
  },
  "min_50m": {
   "gradient_pct": -21.8665460354282,
   "start_distance_m": 263.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 296.5167811064252,
   "end_elevation_m": 285.5835080887111,
   "start_xy": [
    598013.34479262,
    4404231.7778973775
   ],
   "end_xy": [
    597964.4623326673,
    4404240.109275378
   ]
  },
  "min_100m": {
   "gradient_pct": -3.8928088281151645,
   "start_distance_m": 213.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 263.0,
   "start_elevation_m": 289.47631691682625,
   "end_elevation_m": 285.5835080887111,
   "start_xy": [
    598063.282908874,
    4404230.354757594
   ],
   "end_xy": [
    597964.4623326673,
    4404240.109275378
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 36.9628822533457,
   "start_distance_m": 387.0,
   "end_distance_m": 389.0,
   "midpoint_distance_m": 388.0,
   "start_elevation_m": 304.599436213503,
   "end_elevation_m": 305.3386938585699,
   "start_xy": [
    597995.9187984684,
    4404305.978935627
   ],
   "end_xy": [
    597996.8188214193,
    4404307.764981172
   ]
  },
  "max_3m": {
   "gradient_pct": 35.729383887466305,
   "start_distance_m": 387.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 388.5,
   "start_elevation_m": 304.599436213503,
   "end_elevation_m": 305.671317730127,
   "start_xy": [
    597995.9187984684,
    4404305.978935627
   ],
   "end_xy": [
    597997.2690220961,
    4404308.657908496
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.12,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    0.0,
    20.0
   ],
   [
    298.0,
    329.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa-west/USGS_1M_17_x59y441_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-15T03:25:48+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/pennsylvania-2026-09-07.osm.pbf",
  "osm_snapshot": "2026-09-06T20:21:35Z",
  "run_id": "retro-260914",
  "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, PA_WesternPA_2019_D20 (collected 2020)",
  "elevation_tile_ids": [
   "x59y441"
  ],
  "route_cut_m": 442.0,
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_WesternPA_2019_D20: HTTP Error 404: Not Found",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "structure_mask_ranges_m": [
   [
    0.0,
    15.0
   ]
  ],
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Nicholson",
  "county": "Pennsylvania"
 },
 "review_flags": [
  {
   "kind": "possible-bridge-or-hollow",
   "span_m": [
    303.0,
    394.0
   ],
   "status": "pending-human-review",
   "noted": "2026-09-21",
   "figure_adjusted": false
  }
 ]
}