{
 "ocl_version": "0.1.0",
 "name": "Chrisner Road",
 "slug": "chrisner-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.960990506930216,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1760.0,
   "end_distance_m": 1762.0,
   "start_elevation_m": 438.4806224924597,
   "end_elevation_m": 439.0198423025983,
   "min_gradient_pct": -9.704046176850056
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.83512904348686,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1760.0,
   "end_distance_m": 1763.0,
   "start_elevation_m": 438.4806224924597,
   "end_elevation_m": 439.2256763637643,
   "min_gradient_pct": -9.205031234390995
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.49567136766109,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2455.0,
   "end_distance_m": 2460.0,
   "start_elevation_m": 489.54608681244986,
   "end_elevation_m": 490.6208703808329,
   "min_gradient_pct": -9.173887715641058
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.786100832266357,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2451.0,
   "end_distance_m": 2461.0,
   "start_elevation_m": 488.7403858572542,
   "end_elevation_m": 490.8189959404808,
   "min_gradient_pct": -8.786589077220697
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.599634567888074,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2439.0,
   "end_distance_m": 2459.0,
   "start_elevation_m": 486.29655149139074,
   "end_elevation_m": 490.41647840496836,
   "min_gradient_pct": -8.138967031729578
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.36274776625487,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2439.0,
   "end_distance_m": 2464.0,
   "start_elevation_m": 486.29655149139074,
   "end_elevation_m": 491.38723843295446,
   "min_gradient_pct": -7.68785003581911
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.65297124715812,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2428.0,
   "end_distance_m": 2478.0,
   "start_elevation_m": 484.39187632114357,
   "end_elevation_m": 493.71836194472263,
   "min_gradient_pct": -6.597579266818002
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.54296815370043,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2428.0,
   "end_distance_m": 2528.0,
   "start_elevation_m": 484.39187632114357,
   "end_elevation_m": 500.934844474844,
   "min_gradient_pct": -5.912015919689566
  }
 ],
 "shape": {
  "ascent_concentration": 0.394,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 448.0,
  "shape_class": "sustained"
 },
 "length_m": 4020.447015467292,
 "start_elevation_m": 356.38634657232905,
 "end_elevation_m": 596.2998866837123,
 "endpoint_gain_m": 239.91354011138327,
 "overall_gradient_pct": 5.967334955252442,
 "accumulated_ascent_m": 260.54087629882054,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.49567136766109,
   "start_distance_m": 2455.0,
   "end_distance_m": 2460.0,
   "midpoint_distance_m": 2457.5,
   "start_elevation_m": 489.54608681244986,
   "end_elevation_m": 490.6208703808329,
   "start_xy": [
    647494.9181771494,
    4461244.42543851
   ],
   "end_xy": [
    647490.0264707726,
    4461245.460430647
   ]
  },
  "max_10m": {
   "gradient_pct": 20.786100832266357,
   "start_distance_m": 2451.0,
   "end_distance_m": 2461.0,
   "midpoint_distance_m": 2456.0,
   "start_elevation_m": 488.7403858572542,
   "end_elevation_m": 490.8189959404808,
   "start_xy": [
    647498.8315422508,
    4461243.597444802
   ],
   "end_xy": [
    647489.049357828,
    4461245.520996737
   ]
  },
  "max_20m": {
   "gradient_pct": 20.599634567888074,
   "start_distance_m": 2439.0,
   "end_distance_m": 2459.0,
   "midpoint_distance_m": 2449.0,
   "start_elevation_m": 486.29655149139074,
   "end_elevation_m": 490.41647840496836,
   "start_xy": [
    647509.5051148023,
    4461238.768004652
   ],
   "end_xy": [
    647491.0048120479,
    4461245.25343222
   ]
  },
  "max_25m": {
   "gradient_pct": 20.36274776625487,
   "start_distance_m": 2439.0,
   "end_distance_m": 2464.0,
   "midpoint_distance_m": 2451.5,
   "start_elevation_m": 486.29655149139074,
   "end_elevation_m": 491.38723843295446,
   "start_xy": [
    647509.5051148023,
    4461238.768004652
   ],
   "end_xy": [
    647486.1251645806,
    4461244.850852087
   ]
  },
  "max_50m": {
   "gradient_pct": 18.65297124715812,
   "start_distance_m": 2428.0,
   "end_distance_m": 2478.0,
   "midpoint_distance_m": 2453.0,
   "start_elevation_m": 484.39187632114357,
   "end_elevation_m": 493.71836194472263,
   "start_xy": [
    647515.6464284365,
    4461229.762572429
   ],
   "end_xy": [
    647472.6294242282,
    4461241.263695732
   ]
  },
  "max_100m": {
   "gradient_pct": 16.54296815370043,
   "start_distance_m": 2428.0,
   "end_distance_m": 2528.0,
   "midpoint_distance_m": 2478.0,
   "start_elevation_m": 484.39187632114357,
   "end_elevation_m": 500.934844474844,
   "start_xy": [
    647515.6464284365,
    4461229.762572429
   ],
   "end_xy": [
    647427.7532562627,
    4461219.290109219
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.173887715641058,
   "start_distance_m": 2357.0,
   "end_distance_m": 2362.0,
   "midpoint_distance_m": 2359.5,
   "start_elevation_m": 483.0018728913032,
   "end_elevation_m": 482.54317850552115,
   "start_xy": [
    647544.578670818,
    4461164.981844416
   ],
   "end_xy": [
    647542.5940494251,
    4461169.57110121
   ]
  },
  "min_10m": {
   "gradient_pct": -8.786589077220697,
   "start_distance_m": 2353.0,
   "end_distance_m": 2363.0,
   "midpoint_distance_m": 2358.0,
   "start_elevation_m": 483.33924578437393,
   "end_elevation_m": 482.46058687665186,
   "start_xy": [
    647546.1663679325,
    4461161.310438979
   ],
   "end_xy": [
    647542.1971251465,
    4461170.488952569
   ]
  },
  "min_20m": {
   "gradient_pct": -8.138967031729578,
   "start_distance_m": 2349.0,
   "end_distance_m": 2369.0,
   "midpoint_distance_m": 2359.0,
   "start_elevation_m": 483.63747162309227,
   "end_elevation_m": 482.00967821674635,
   "start_xy": [
    647547.7540650469,
    4461157.639033544
   ],
   "end_xy": [
    647539.8155794749,
    4461175.9960607225
   ]
  },
  "min_25m": {
   "gradient_pct": -7.68785003581911,
   "start_distance_m": 2345.0,
   "end_distance_m": 2370.0,
   "midpoint_distance_m": 2357.5,
   "start_elevation_m": 483.87706707273145,
   "end_elevation_m": 481.9551045637767,
   "start_xy": [
    647549.3417621612,
    4461153.967628108
   ],
   "end_xy": [
    647539.4186551962,
    4461176.913912081
   ]
  },
  "min_50m": {
   "gradient_pct": -6.597579266818002,
   "start_distance_m": 680.0,
   "end_distance_m": 730.0,
   "midpoint_distance_m": 705.0,
   "start_elevation_m": 388.5514524294125,
   "end_elevation_m": 385.2526627960035,
   "start_xy": [
    648248.6626676543,
    4459832.232880923
   ],
   "end_xy": [
    648250.514249376,
    4459881.927169573
   ]
  },
  "min_100m": {
   "gradient_pct": -5.912015919689566,
   "start_distance_m": 646.0,
   "end_distance_m": 746.0,
   "midpoint_distance_m": 696.0,
   "start_elevation_m": 390.3081211652768,
   "end_elevation_m": 384.39610524558725,
   "start_xy": [
    648243.592555961,
    4459798.6130360775
   ],
   "end_xy": [
    648248.935355689,
    4459897.849075699
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.960990506930216,
   "start_distance_m": 1760.0,
   "end_distance_m": 1762.0,
   "midpoint_distance_m": 1761.0,
   "start_elevation_m": 438.4806224924597,
   "end_elevation_m": 439.0198423025983,
   "start_xy": [
    647962.6250477288,
    4460800.504465696
   ],
   "end_xy": [
    647961.6282174287,
    4460802.238342668
   ]
  },
  "max_3m": {
   "gradient_pct": 24.83512904348686,
   "start_distance_m": 1760.0,
   "end_distance_m": 1763.0,
   "midpoint_distance_m": 1761.5,
   "start_elevation_m": 438.4806224924597,
   "end_elevation_m": 439.2256763637643,
   "start_xy": [
    647962.6250477288,
    4460800.504465696
   ],
   "end_xy": [
    647961.1298022786,
    4460803.105281154
   ]
  }
 },
 "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": []
 },
 "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_x64y446_PA_WesternPA_2019_D20.tif",
   "data/cache/usa/pa-west/USGS_1M_17_x64y447_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T12:41:10+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-band2.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_WesternPA_2019_D20 (collected 2020)",
  "elevation_tile_ids": [
   "x64y446",
   "x64y447"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_WesternPA_2019_D20: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Ligonier",
  "county": "Pennsylvania"
 },
 "review_flags": [
  {
   "kind": "possible-bridge-or-hollow",
   "span_m": [
    2334.0,
    2481.0
   ],
   "status": "pending-human-review",
   "noted": "2026-09-21",
   "figure_adjusted": false
  }
 ]
}