{
 "ocl_version": "0.1.0",
 "name": "Collins Avenue",
 "slug": "collins-avenue-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.458852577513767,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 429.0,
   "end_distance_m": 431.0,
   "start_elevation_m": 349.0819058124598,
   "end_elevation_m": 349.5510828640101,
   "min_gradient_pct": -2.0452414551783704
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.304502854015634,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 428.0,
   "end_distance_m": 431.0,
   "start_elevation_m": 348.8519477783896,
   "end_elevation_m": 349.5510828640101,
   "min_gradient_pct": -1.8952556862681529
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.206372035541563,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 426.0,
   "end_distance_m": 431.0,
   "start_elevation_m": 348.390764262233,
   "end_elevation_m": 349.5510828640101,
   "min_gradient_pct": -1.1966924773651044
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.959518263306222,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 424.0,
   "end_distance_m": 434.0,
   "start_elevation_m": 347.9437594277338,
   "end_elevation_m": 350.23971125406445,
   "min_gradient_pct": 0.1529977612295852
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.717283843365124,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 428.0,
   "end_distance_m": 448.0,
   "start_elevation_m": 348.8519477783896,
   "end_elevation_m": 353.39540454706264,
   "min_gradient_pct": 1.5992844805879258
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.698525371884898,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 423.0,
   "end_distance_m": 448.0,
   "start_elevation_m": 347.7207732040914,
   "end_elevation_m": 353.39540454706264,
   "min_gradient_pct": 2.0167856246939664
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.500748523914126,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 405.0,
   "end_distance_m": 455.0,
   "start_elevation_m": 344.0712386484473,
   "end_elevation_m": 354.8216129104044,
   "min_gradient_pct": 2.28920752974318
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.184813487055408,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 416.0,
   "end_distance_m": 516.0,
   "start_elevation_m": 346.23588960209815,
   "end_elevation_m": 365.42070308915356,
   "min_gradient_pct": 2.7449469052002655
  }
 ],
 "shape": {
  "ascent_concentration": 0.564,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 212.0,
  "shape_class": "stepped"
 },
 "length_m": 591.4142851400082,
 "start_elevation_m": 326.10332328795306,
 "end_elevation_m": 377.8521598592543,
 "endpoint_gain_m": 51.74883657130124,
 "overall_gradient_pct": 8.750014646509678,
 "accumulated_ascent_m": 51.810131211231635,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.206372035541563,
   "start_distance_m": 426.0,
   "end_distance_m": 431.0,
   "midpoint_distance_m": 428.5,
   "start_elevation_m": 348.390764262233,
   "end_elevation_m": 349.5510828640101,
   "start_xy": [
    608315.3958171753,
    4463002.871649967
   ],
   "end_xy": [
    608310.3959470298,
    4463002.907685067
   ]
  },
  "max_10m": {
   "gradient_pct": 22.959518263306222,
   "start_distance_m": 424.0,
   "end_distance_m": 434.0,
   "midpoint_distance_m": 429.0,
   "start_elevation_m": 347.9437594277338,
   "end_elevation_m": 350.23971125406445,
   "start_xy": [
    608317.3957652334,
    4463002.857235926
   ],
   "end_xy": [
    608307.3960249425,
    4463002.929306127
   ]
  },
  "max_20m": {
   "gradient_pct": 22.717283843365124,
   "start_distance_m": 428.0,
   "end_distance_m": 448.0,
   "midpoint_distance_m": 438.0,
   "start_elevation_m": 348.8519477783896,
   "end_elevation_m": 353.39540454706264,
   "start_xy": [
    608313.395869117,
    4463002.886064007
   ],
   "end_xy": [
    608293.3964719541,
    4463003.041037844
   ]
  },
  "max_25m": {
   "gradient_pct": 22.698525371884898,
   "start_distance_m": 423.0,
   "end_distance_m": 448.0,
   "midpoint_distance_m": 435.5,
   "start_elevation_m": 347.7207732040914,
   "end_elevation_m": 353.39540454706264,
   "start_xy": [
    608318.3957392626,
    4463002.850028906
   ],
   "end_xy": [
    608293.3964719541,
    4463003.041037844
   ]
  },
  "max_50m": {
   "gradient_pct": 21.500748523914126,
   "start_distance_m": 405.0,
   "end_distance_m": 455.0,
   "midpoint_distance_m": 430.0,
   "start_elevation_m": 344.0712386484473,
   "end_elevation_m": 354.8216129104044,
   "start_xy": [
    608336.3952717863,
    4463002.720302545
   ],
   "end_xy": [
    608286.3967068839,
    4463003.098387327
   ]
  },
  "max_100m": {
   "gradient_pct": 19.184813487055408,
   "start_distance_m": 416.0,
   "end_distance_m": 516.0,
   "midpoint_distance_m": 466.0,
   "start_elevation_m": 346.23588960209815,
   "end_elevation_m": 365.42070308915356,
   "start_xy": [
    608325.3955574662,
    4463002.799579766
   ],
   "end_xy": [
    608225.3987541301,
    4463003.598147106
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.1966924773651044,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 326.12857850263134,
   "end_elevation_m": 326.0687438787631,
   "start_xy": [
    608357.3901270417,
    4463386.23049505
   ],
   "end_xy": [
    608358.2949612546,
    4463381.314409025
   ]
  },
  "min_10m": {
   "gradient_pct": 0.1529977612295852,
   "start_distance_m": 1.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 6.0,
   "start_elevation_m": 326.1255219869272,
   "end_elevation_m": 326.14082176305016,
   "start_xy": [
    608357.2025635209,
    4463387.2127475245
   ],
   "end_xy": [
    608358.7012575095,
    4463377.335097105
   ]
  },
  "min_20m": {
   "gradient_pct": 1.5992844805879258,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 326.10332328795306,
   "end_elevation_m": 326.42318018407065,
   "start_xy": [
    608357.015,
    4463388.195
   ],
   "end_xy": [
    608359.6154240832,
    4463368.381645286
   ]
  },
  "min_25m": {
   "gradient_pct": 2.0167856246939664,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 326.10332328795306,
   "end_elevation_m": 326.60751969412655,
   "start_xy": [
    608357.015,
    4463388.195
   ],
   "end_xy": [
    608360.1232944018,
    4463363.4075053865
   ]
  },
  "min_50m": {
   "gradient_pct": 2.28920752974318,
   "start_distance_m": 124.0,
   "end_distance_m": 174.0,
   "midpoint_distance_m": 149.0,
   "start_elevation_m": 329.9956562925957,
   "end_elevation_m": 331.1402600574673,
   "start_xy": [
    608368.9567089478,
    4463264.828522816
   ],
   "end_xy": [
    608367.5698401621,
    4463214.864718814
   ]
  },
  "min_100m": {
   "gradient_pct": 2.7449469052002655,
   "start_distance_m": 117.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 167.0,
   "start_elevation_m": 329.7552104612594,
   "end_elevation_m": 332.5001573664597,
   "start_xy": [
    608368.791834171,
    4463271.826580854
   ],
   "end_xy": [
    608365.5424772815,
    4463171.918560582
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.458852577513767,
   "start_distance_m": 429.0,
   "end_distance_m": 431.0,
   "midpoint_distance_m": 430.0,
   "start_elevation_m": 349.0819058124598,
   "end_elevation_m": 349.5510828640101,
   "start_xy": [
    608312.395895088,
    4463002.893271026
   ],
   "end_xy": [
    608310.3959470298,
    4463002.907685067
   ]
  },
  "max_3m": {
   "gradient_pct": 23.304502854015634,
   "start_distance_m": 428.0,
   "end_distance_m": 431.0,
   "midpoint_distance_m": 429.5,
   "start_elevation_m": 348.8519477783896,
   "end_elevation_m": 349.5510828640101,
   "start_xy": [
    608313.395869117,
    4463002.886064007
   ],
   "end_xy": [
    608310.3959470298,
    4463002.907685067
   ]
  }
 },
 "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_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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa-west/USGS_1M_17_x60y447_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T12:11:56+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-band1.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": [
   "x60y447"
  ],
  "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": "North Huntingdon",
  "county": "Pennsylvania"
 }
}