{
 "ocl_version": "0.1.0",
 "name": "Lord Pond Road",
 "slug": "lord-pond-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.124222115997895,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 351.0,
   "end_distance_m": 353.0,
   "start_elevation_m": 377.705808513668,
   "end_elevation_m": 378.18829295598795,
   "min_gradient_pct": -18.900936676249103
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.179169453226223,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 350.0,
   "end_distance_m": 353.0,
   "start_elevation_m": 377.49291787239116,
   "end_elevation_m": 378.18829295598795,
   "min_gradient_pct": -18.652352952517504
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.37641716945518,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 348.0,
   "end_distance_m": 353.0,
   "start_elevation_m": 377.0694720975152,
   "end_elevation_m": 378.18829295598795,
   "min_gradient_pct": -17.66992910635736
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.748225242943136,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 346.0,
   "end_distance_m": 356.0,
   "start_elevation_m": 376.64854443242257,
   "end_elevation_m": 378.8233669567169,
   "min_gradient_pct": -16.26703216190151
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.046609042527393,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 336.0,
   "end_distance_m": 356.0,
   "start_elevation_m": 374.6140451482114,
   "end_elevation_m": 378.8233669567169,
   "min_gradient_pct": -14.041531379691605
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.742816552450677,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 336.0,
   "end_distance_m": 361.0,
   "start_elevation_m": 374.6140451482114,
   "end_elevation_m": 379.7997492863241,
   "min_gradient_pct": -12.54636525000251
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.321319772662378,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 317.0,
   "end_distance_m": 367.0,
   "start_elevation_m": 371.2353773560674,
   "end_elevation_m": 380.89603724239856,
   "min_gradient_pct": -8.50615823290434
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.49446949416216,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 316.0,
   "end_distance_m": 416.0,
   "start_elevation_m": 371.05863862577405,
   "end_elevation_m": 389.5531081199362,
   "min_gradient_pct": -5.737157697667271
  }
 ],
 "shape": {
  "ascent_concentration": 0.534,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 198.0,
  "shape_class": "stepped"
 },
 "length_m": 742.2816694077811,
 "start_elevation_m": 366.63874595424426,
 "end_elevation_m": 416.1577610519307,
 "endpoint_gain_m": 49.51901509768646,
 "overall_gradient_pct": 6.671189272017791,
 "accumulated_ascent_m": 56.7580883783624,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.37641716945518,
   "start_distance_m": 348.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 350.5,
   "start_elevation_m": 377.0694720975152,
   "end_elevation_m": 378.18829295598795,
   "start_xy": [
    431601.8950312346,
    4617291.223919234
   ],
   "end_xy": [
    431603.805896396,
    4617295.844373144
   ]
  },
  "max_10m": {
   "gradient_pct": 21.748225242943136,
   "start_distance_m": 346.0,
   "end_distance_m": 356.0,
   "midpoint_distance_m": 351.0,
   "start_elevation_m": 376.64854443242257,
   "end_elevation_m": 378.8233669567169,
   "start_xy": [
    431601.13068517006,
    4617289.375737671
   ],
   "end_xy": [
    431604.95241549285,
    4617298.616645491
   ]
  },
  "max_20m": {
   "gradient_pct": 21.046609042527393,
   "start_distance_m": 336.0,
   "end_distance_m": 356.0,
   "midpoint_distance_m": 346.0,
   "start_elevation_m": 374.6140451482114,
   "end_elevation_m": 378.8233669567169,
   "start_xy": [
    431597.3089548472,
    4617280.13482985
   ],
   "end_xy": [
    431604.95241549285,
    4617298.616645491
   ]
  },
  "max_25m": {
   "gradient_pct": 20.742816552450677,
   "start_distance_m": 336.0,
   "end_distance_m": 361.0,
   "midpoint_distance_m": 348.5,
   "start_elevation_m": 374.6140451482114,
   "end_elevation_m": 379.7997492863241,
   "start_xy": [
    431597.3089548472,
    4617280.13482985
   ],
   "end_xy": [
    431606.8632806543,
    4617303.237099401
   ]
  },
  "max_50m": {
   "gradient_pct": 19.321319772662378,
   "start_distance_m": 317.0,
   "end_distance_m": 367.0,
   "midpoint_distance_m": 342.0,
   "start_elevation_m": 371.2353773560674,
   "end_elevation_m": 380.89603724239856,
   "start_xy": [
    431590.04766723386,
    4617262.577104992
   ],
   "end_xy": [
    431609.14684327587,
    4617308.785333751
   ]
  },
  "max_100m": {
   "gradient_pct": 18.49446949416216,
   "start_distance_m": 316.0,
   "end_distance_m": 416.0,
   "midpoint_distance_m": 366.0,
   "start_elevation_m": 371.05863862577405,
   "end_elevation_m": 389.5531081199362,
   "start_xy": [
    431589.6654942016,
    4617261.65301421
   ],
   "end_xy": [
    431625.9718399876,
    4617354.806192995
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -17.66992910635736,
   "start_distance_m": 113.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 115.5,
   "start_elevation_m": 362.17091433012035,
   "end_elevation_m": 361.2874178748025,
   "start_xy": [
    431682.4409176702,
    4617123.728136398
   ],
   "end_xy": [
    431677.44677056937,
    4617123.969993246
   ]
  },
  "min_10m": {
   "gradient_pct": -16.26703216190151,
   "start_distance_m": 112.0,
   "end_distance_m": 122.0,
   "midpoint_distance_m": 117.0,
   "start_elevation_m": 362.302406425194,
   "end_elevation_m": 360.67570320900387,
   "start_xy": [
    431683.437520419,
    4617123.661357116
   ],
   "end_xy": [
    431673.45145288866,
    4617124.163478725
   ]
  },
  "min_20m": {
   "gradient_pct": -14.041531379691605,
   "start_distance_m": 109.0,
   "end_distance_m": 129.0,
   "midpoint_distance_m": 119.0,
   "start_elevation_m": 362.64479405562224,
   "end_elevation_m": 359.8364877796839,
   "start_xy": [
    431686.38218463794,
    4617123.087813187
   ],
   "end_xy": [
    431666.49996404996,
    4617124.95006835
   ]
  },
  "min_25m": {
   "gradient_pct": -12.54636525000251,
   "start_distance_m": 106.0,
   "end_distance_m": 131.0,
   "midpoint_distance_m": 118.5,
   "start_elevation_m": 362.83718541675785,
   "end_elevation_m": 359.7005941042572,
   "start_xy": [
    431689.3268488569,
    4617122.514269259
   ],
   "end_xy": [
    431664.5450361787,
    4617125.3647448495
   ]
  },
  "min_50m": {
   "gradient_pct": -8.50615823290434,
   "start_distance_m": 87.0,
   "end_distance_m": 137.0,
   "midpoint_distance_m": 112.0,
   "start_elevation_m": 363.70663734118676,
   "end_elevation_m": 359.4535582247346,
   "start_xy": [
    431707.1330253167,
    4617115.942335552
   ],
   "end_xy": [
    431658.86725070194,
    4617127.197734213
   ]
  },
  "min_100m": {
   "gradient_pct": -5.737157697667271,
   "start_distance_m": 36.0,
   "end_distance_m": 136.0,
   "midpoint_distance_m": 86.0,
   "start_elevation_m": 365.206144012604,
   "end_elevation_m": 359.4689863149367,
   "start_xy": [
    431747.93130061106,
    4617086.381797006
   ],
   "end_xy": [
    431659.7687644448,
    4617126.764983742
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.124222115997895,
   "start_distance_m": 351.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 352.0,
   "start_elevation_m": 377.705808513668,
   "end_elevation_m": 378.18829295598795,
   "start_xy": [
    431603.04155033146,
    4617293.996191581
   ],
   "end_xy": [
    431603.805896396,
    4617295.844373144
   ]
  },
  "max_3m": {
   "gradient_pct": 23.179169453226223,
   "start_distance_m": 350.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 351.5,
   "start_elevation_m": 377.49291787239116,
   "end_elevation_m": 378.18829295598795,
   "start_xy": [
    431602.6593772992,
    4617293.072100799
   ],
   "end_xy": [
    431603.805896396,
    4617295.844373144
   ]
  }
 },
 "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": [
   "descends_at_start"
  ]
 },
 "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_x43y462_PA_Northcentral_2019_B19.tif"
  ],
  "calculated_at": "2026-09-07T15:43:44+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-band4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "pa-run4-260907",
  "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": [
   "x43y462"
  ],
  "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": "Lathrop",
  "county": "Pennsylvania"
 }
}