{
 "ocl_version": "0.1.0",
 "name": "Shaffer Street",
 "slug": "shaffer-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.32245651181688,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 33.0,
   "end_distance_m": 35.0,
   "start_elevation_m": 414.2681816313307,
   "end_elevation_m": 414.75463076156706,
   "min_gradient_pct": -6.097689362712799
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.794754678215213,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 32.0,
   "end_distance_m": 35.0,
   "start_elevation_m": 414.0407881212206,
   "end_elevation_m": 414.75463076156706,
   "min_gradient_pct": -5.903623241941129
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.526922849421226,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 30.0,
   "end_distance_m": 35.0,
   "start_elevation_m": 413.578284619096,
   "end_elevation_m": 414.75463076156706,
   "min_gradient_pct": -5.756341470809048
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.08337928267065,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 4.0,
   "end_distance_m": 14.0,
   "start_elevation_m": 407.83916442625844,
   "end_elevation_m": 410.1475023545255,
   "min_gradient_pct": -5.357541200435776
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.24414747082733,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 4.0,
   "end_distance_m": 24.0,
   "start_elevation_m": 407.83916442625844,
   "end_elevation_m": 412.2879939204239,
   "min_gradient_pct": -4.753517111983285
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.083417980750937,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 10.0,
   "end_distance_m": 35.0,
   "start_elevation_m": 409.2337762663793,
   "end_elevation_m": 414.75463076156706,
   "min_gradient_pct": -4.546322250905405
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.419728813731354,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2.0,
   "end_distance_m": 52.0,
   "start_elevation_m": 407.4970463060697,
   "end_elevation_m": 417.7069107129354,
   "min_gradient_pct": -3.579919234234694
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.78513249018863,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 3.0,
   "end_distance_m": 103.0,
   "start_elevation_m": 407.6352012948396,
   "end_elevation_m": 424.4203337850282,
   "min_gradient_pct": 0.09339318689211495
  }
 ],
 "shape": {
  "ascent_concentration": 0.466,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 77.0,
  "shape_class": "stepped"
 },
 "length_m": 233.27755928098748,
 "start_elevation_m": 407.4091564331124,
 "end_elevation_m": 428.6946613877999,
 "endpoint_gain_m": 21.285504954687497,
 "overall_gradient_pct": 9.12454032024944,
 "accumulated_ascent_m": 23.089014136985043,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.526922849421226,
   "start_distance_m": 30.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 32.5,
   "start_elevation_m": 413.578284619096,
   "end_elevation_m": 414.75463076156706,
   "start_xy": [
    676526.386408686,
    4463306.591014628
   ],
   "end_xy": [
    676531.0141434671,
    4463304.6978504
   ]
  },
  "max_10m": {
   "gradient_pct": 23.08337928267065,
   "start_distance_m": 4.0,
   "end_distance_m": 14.0,
   "midpoint_distance_m": 9.0,
   "start_elevation_m": 407.83916442625844,
   "end_elevation_m": 410.1475023545255,
   "start_xy": [
    676502.3221878248,
    4463316.435468617
   ],
   "end_xy": [
    676511.5776573868,
    4463312.64914016
   ]
  },
  "max_20m": {
   "gradient_pct": 22.24414747082733,
   "start_distance_m": 4.0,
   "end_distance_m": 24.0,
   "midpoint_distance_m": 14.0,
   "start_elevation_m": 407.83916442625844,
   "end_elevation_m": 412.2879939204239,
   "start_xy": [
    676502.3221878248,
    4463316.435468617
   ],
   "end_xy": [
    676520.8331269488,
    4463308.862811702
   ]
  },
  "max_25m": {
   "gradient_pct": 22.083417980750937,
   "start_distance_m": 10.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 22.5,
   "start_elevation_m": 409.2337762663793,
   "end_elevation_m": 414.75463076156706,
   "start_xy": [
    676507.875469562,
    4463314.163671543
   ],
   "end_xy": [
    676531.0141434671,
    4463304.6978504
   ]
  },
  "max_50m": {
   "gradient_pct": 20.419728813731354,
   "start_distance_m": 2.0,
   "end_distance_m": 52.0,
   "midpoint_distance_m": 27.0,
   "start_elevation_m": 407.4970463060697,
   "end_elevation_m": 417.7069107129354,
   "start_xy": [
    676500.4710939124,
    4463317.192734309
   ],
   "end_xy": [
    676546.7484417225,
    4463298.261092022
   ]
  },
  "max_100m": {
   "gradient_pct": 16.78513249018863,
   "start_distance_m": 3.0,
   "end_distance_m": 103.0,
   "midpoint_distance_m": 53.0,
   "start_elevation_m": 407.6352012948396,
   "end_elevation_m": 424.4203337850282,
   "start_xy": [
    676501.3966408686,
    4463316.814101463
   ],
   "end_xy": [
    676583.6602060114,
    4463263.182473235
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.756341470809048,
   "start_distance_m": 207.0,
   "end_distance_m": 212.0,
   "midpoint_distance_m": 209.5,
   "start_elevation_m": 429.0428872114221,
   "end_elevation_m": 428.75507013788166,
   "start_xy": [
    676651.1607079947,
    4463184.186009324
   ],
   "end_xy": [
    676654.0516332596,
    4463180.106481029
   ]
  },
  "min_10m": {
   "gradient_pct": -5.357541200435776,
   "start_distance_m": 202.0,
   "end_distance_m": 212.0,
   "midpoint_distance_m": 207.0,
   "start_elevation_m": 429.29082425792524,
   "end_elevation_m": 428.75507013788166,
   "start_xy": [
    676648.2697827297,
    4463188.26553762
   ],
   "end_xy": [
    676654.0516332596,
    4463180.106481029
   ]
  },
  "min_20m": {
   "gradient_pct": -4.753517111983285,
   "start_distance_m": 194.0,
   "end_distance_m": 214.0,
   "midpoint_distance_m": 204.0,
   "start_elevation_m": 429.6107458811014,
   "end_elevation_m": 428.66004245870477,
   "start_xy": [
    676643.6443023058,
    4463194.792782892
   ],
   "end_xy": [
    676655.2080033657,
    4463178.474669711
   ]
  },
  "min_25m": {
   "gradient_pct": -4.546322250905405,
   "start_distance_m": 193.0,
   "end_distance_m": 218.0,
   "midpoint_distance_m": 205.5,
   "start_elevation_m": 429.64745078288473,
   "end_elevation_m": 428.5108702201584,
   "start_xy": [
    676643.0661172528,
    4463195.608688551
   ],
   "end_xy": [
    676657.5207435776,
    4463175.211047075
   ]
  },
  "min_50m": {
   "gradient_pct": -3.579919234234694,
   "start_distance_m": 172.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 197.0,
   "start_elevation_m": 430.2379323650984,
   "end_elevation_m": 428.44797274798105,
   "start_xy": [
    676629.505739454,
    4463211.615167086
   ],
   "end_xy": [
    676659.8334837896,
    4463171.947424438
   ]
  },
  "min_100m": {
   "gradient_pct": 0.09339318689211495,
   "start_distance_m": 133.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 183.0,
   "start_elevation_m": 428.5937233205021,
   "end_elevation_m": 428.6871165073942,
   "start_xy": [
    676603.5930466385,
    4463240.761905344
   ],
   "end_xy": [
    676666.1935193725,
    4463162.972462188
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.32245651181688,
   "start_distance_m": 33.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 34.0,
   "start_elevation_m": 414.2681816313307,
   "end_elevation_m": 414.75463076156706,
   "start_xy": [
    676529.1630495547,
    4463305.455116091
   ],
   "end_xy": [
    676531.0141434671,
    4463304.6978504
   ]
  },
  "max_3m": {
   "gradient_pct": 23.794754678215213,
   "start_distance_m": 32.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 33.5,
   "start_elevation_m": 414.0407881212206,
   "end_elevation_m": 414.75463076156706,
   "start_xy": [
    676528.2375025984,
    4463305.833748937
   ],
   "end_xy": [
    676531.0141434671,
    4463304.6978504
   ]
  }
 },
 "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"
  ]
 },
 "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_x67y447_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T12:49:24+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": [
   "x67y447"
  ],
  "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": "Johnstown",
  "county": "Pennsylvania"
 }
}