{
 "ocl_version": "0.1.0",
 "name": "Harding Lane",
 "slug": "harding-lane",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.664863625625685,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 80.0,
   "end_distance_m": 82.0,
   "start_elevation_m": 259.6713188594747,
   "end_elevation_m": 260.3446161319872,
   "min_gradient_pct": -4.440632944746881
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.02343006730363,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 80.0,
   "end_distance_m": 83.0,
   "start_elevation_m": 259.6713188594747,
   "end_elevation_m": 260.6620217614938,
   "min_gradient_pct": -2.815308994524912
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.58142076064678,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 78.0,
   "end_distance_m": 83.0,
   "start_elevation_m": 259.08295072346147,
   "end_elevation_m": 260.6620217614938,
   "min_gradient_pct": 1.1228049672945417
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.138998551956433,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 74.0,
   "end_distance_m": 84.0,
   "start_elevation_m": 258.1045960918324,
   "end_elevation_m": 260.918495947028,
   "min_gradient_pct": 6.427960584344419
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.49412966640574,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 65.0,
   "end_distance_m": 85.0,
   "start_elevation_m": 256.03789593370317,
   "end_elevation_m": 261.1367218669843,
   "min_gradient_pct": 8.08663425278013
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.23489827874016,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 59.0,
   "end_distance_m": 84.0,
   "start_elevation_m": 254.60977137734298,
   "end_elevation_m": 260.918495947028,
   "min_gradient_pct": 9.167881471235432
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 24.24634717694443,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 34.0,
   "end_distance_m": 84.0,
   "start_elevation_m": 248.7953223585558,
   "end_elevation_m": 260.918495947028,
   "min_gradient_pct": 12.310027629748447
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.335850075182606,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 34.0,
   "end_distance_m": 134.0,
   "start_elevation_m": 248.7953223585558,
   "end_elevation_m": 270.1311724337384,
   "min_gradient_pct": 12.946749669783742
  }
 ],
 "shape": {
  "ascent_concentration": 0.326,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 249.0,
  "shape_class": "sustained"
 },
 "length_m": 421.7999999997968,
 "start_elevation_m": 243.67691736475948,
 "end_elevation_m": 312.7763336795803,
 "endpoint_gain_m": 69.09941631482084,
 "overall_gradient_pct": 16.382033265731184,
 "accumulated_ascent_m": 69.21947967059114,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.58142076064678,
   "start_distance_m": 78.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 80.5,
   "start_elevation_m": 259.08295072346147,
   "end_elevation_m": 260.6620217614938,
   "start_xy": [
    417962.2713096056,
    4593726.524941075
   ],
   "end_xy": [
    417965.31449505454,
    4593722.557698892
   ]
  },
  "max_10m": {
   "gradient_pct": 28.138998551956433,
   "start_distance_m": 74.0,
   "end_distance_m": 84.0,
   "midpoint_distance_m": 79.0,
   "start_elevation_m": 258.1045960918324,
   "end_elevation_m": 260.918495947028,
   "start_xy": [
    417959.83677835076,
    4593729.698748752
   ],
   "end_xy": [
    417965.92282237165,
    4593721.764012906
   ]
  },
  "max_20m": {
   "gradient_pct": 25.49412966640574,
   "start_distance_m": 65.0,
   "end_distance_m": 85.0,
   "midpoint_distance_m": 75.0,
   "start_elevation_m": 256.03789593370317,
   "end_elevation_m": 261.1367218669843,
   "start_xy": [
    417954.35885884904,
    4593736.8396438
   ],
   "end_xy": [
    417966.5317492957,
    4593720.970786632
   ]
  },
  "max_25m": {
   "gradient_pct": 25.23489827874016,
   "start_distance_m": 59.0,
   "end_distance_m": 84.0,
   "midpoint_distance_m": 71.5,
   "start_elevation_m": 254.60977137734298,
   "end_elevation_m": 260.918495947028,
   "start_xy": [
    417950.7067456354,
    4593741.600112827
   ],
   "end_xy": [
    417965.92282237165,
    4593721.764012906
   ]
  },
  "max_50m": {
   "gradient_pct": 24.24634717694443,
   "start_distance_m": 34.0,
   "end_distance_m": 84.0,
   "midpoint_distance_m": 59.0,
   "start_elevation_m": 248.7953223585558,
   "end_elevation_m": 260.918495947028,
   "start_xy": [
    417934.6306580857,
    4593760.742432053
   ],
   "end_xy": [
    417965.92282237165,
    4593721.764012906
   ]
  },
  "max_100m": {
   "gradient_pct": 21.335850075182606,
   "start_distance_m": 34.0,
   "end_distance_m": 134.0,
   "midpoint_distance_m": 84.0,
   "start_elevation_m": 248.7953223585558,
   "end_elevation_m": 270.1311724337384,
   "start_xy": [
    417934.6306580857,
    4593760.742432053
   ],
   "end_xy": [
    417995.85845156934,
    4593681.751727095
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.1228049672945417,
   "start_distance_m": 244.0,
   "end_distance_m": 249.0,
   "midpoint_distance_m": 246.5,
   "start_elevation_m": 287.94374568010545,
   "end_elevation_m": 287.9998859284702,
   "start_xy": [
    418057.8985686075,
    4593591.263203037
   ],
   "end_xy": [
    418061.0946680937,
    4593587.418083311
   ]
  },
  "min_10m": {
   "gradient_pct": 6.427960584344419,
   "start_distance_m": 243.0,
   "end_distance_m": 253.0,
   "midpoint_distance_m": 248.0,
   "start_elevation_m": 287.84124334257143,
   "end_elevation_m": 288.4840394010059,
   "start_xy": [
    418057.25906787673,
    4593592.031993441
   ],
   "end_xy": [
    418063.65166595497,
    4593584.342085885
   ]
  },
  "min_20m": {
   "gradient_pct": 8.08663425278013,
   "start_distance_m": 243.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 287.84124334257143,
   "end_elevation_m": 289.45857019312746,
   "start_xy": [
    418057.25906787673,
    4593592.031993441
   ],
   "end_xy": [
    418070.0444562878,
    4593576.652338208
   ]
  },
  "min_25m": {
   "gradient_pct": 9.167881471235432,
   "start_distance_m": 242.0,
   "end_distance_m": 267.0,
   "midpoint_distance_m": 254.5,
   "start_elevation_m": 287.7021461306868,
   "end_elevation_m": 289.99411649849566,
   "start_xy": [
    418056.61977399676,
    4593592.800955863
   ],
   "end_xy": [
    418072.60145414906,
    4593573.5763407815
   ]
  },
  "min_50m": {
   "gradient_pct": 12.310027629748447,
   "start_distance_m": 244.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 269.0,
   "start_elevation_m": 287.94374568010545,
   "end_elevation_m": 294.0987594949797,
   "start_xy": [
    418057.8985686075,
    4593591.263203037
   ],
   "end_xy": [
    418091.5591265833,
    4593554.407553797
   ]
  },
  "min_100m": {
   "gradient_pct": 12.946749669783742,
   "start_distance_m": 242.0,
   "end_distance_m": 342.0,
   "midpoint_distance_m": 292.0,
   "start_elevation_m": 287.7021461306868,
   "end_elevation_m": 300.64889580047054,
   "start_xy": [
    418056.61977399676,
    4593592.800955863
   ],
   "end_xy": [
    418126.4942513252,
    4593521.490436251
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.664863625625685,
   "start_distance_m": 80.0,
   "end_distance_m": 82.0,
   "midpoint_distance_m": 81.0,
   "start_elevation_m": 259.6713188594747,
   "end_elevation_m": 260.3446161319872,
   "start_xy": [
    417963.4883612894,
    4593724.93787358
   ],
   "end_xy": [
    417964.70577059314,
    4593723.351080327
   ]
  },
  "max_3m": {
   "gradient_pct": 33.02343006730363,
   "start_distance_m": 80.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 81.5,
   "start_elevation_m": 259.6713188594747,
   "end_elevation_m": 260.6620217614938,
   "start_xy": [
    417963.4883612894,
    4593724.93787358
   ],
   "end_xy": [
    417965.31449505454,
    4593722.557698892
   ]
  }
 },
 "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",
   "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa/USGS_1M_18_x41y460_PA_Northcentral_2019_B19.tif"
  ],
  "calculated_at": "2026-09-08T20:50:29+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/pennsylvania-2026-09-07-batch.osm.pbf",
  "osm_snapshot": "2026-09-06T20:21:35Z",
  "run_id": "retro-box-260908",
  "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_Northcentral_2019_B19 (collected 2019)",
  "elevation_tile_ids": [
   "x41y460"
  ],
  "route_base_cut_m": 301.3,
  "route_cut_m": 421.8,
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_Northcentral_2019_B19: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Eaton",
  "county": "Pennsylvania"
 }
}