{
 "ocl_version": "0.1.0",
 "name": "West Tarkiln Road",
 "slug": "west-tarkiln-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.68060286381274,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 270.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 430.0091015940221,
   "end_elevation_m": 430.7027136512984,
   "min_gradient_pct": -3.9563661325189514
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.001970527811864,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 270.0,
   "end_distance_m": 273.0,
   "start_elevation_m": 430.0091015940221,
   "end_elevation_m": 430.9991607098565,
   "min_gradient_pct": -2.5278123312546086
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 30.543485967078823,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 269.0,
   "end_distance_m": 274.0,
   "start_elevation_m": 429.72584444495976,
   "end_elevation_m": 431.2530187433137,
   "min_gradient_pct": -1.0202503628920567
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.48824659275158,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 265.0,
   "end_distance_m": 275.0,
   "start_elevation_m": 428.7282358173453,
   "end_elevation_m": 431.47706047662047,
   "min_gradient_pct": 2.112583349014585
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.95092235246068,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 259.0,
   "end_distance_m": 279.0,
   "start_elevation_m": 427.47003454833794,
   "end_elevation_m": 432.26021901883007,
   "min_gradient_pct": 2.2938341178272026
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.510146299914595,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 257.0,
   "end_distance_m": 282.0,
   "start_elevation_m": 427.10228085987285,
   "end_elevation_m": 432.7298174348515,
   "min_gradient_pct": 2.4381018234441854
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.538442091844672,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 239.0,
   "end_distance_m": 289.0,
   "start_elevation_m": 424.53889693350015,
   "end_elevation_m": 433.8081179794225,
   "min_gradient_pct": 2.5861567064488327
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.823011722858155,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 200.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 420.15331283660765,
   "end_elevation_m": 434.9763245594658,
   "min_gradient_pct": 2.904743252236244
  }
 ],
 "shape": {
  "ascent_concentration": 0.39,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 101.0,
  "shape_class": "sustained"
 },
 "length_m": 839.9732301748462,
 "start_elevation_m": 400.7194239861922,
 "end_elevation_m": 466.908612892086,
 "endpoint_gain_m": 66.18918890589379,
 "overall_gradient_pct": 7.879916469732739,
 "accumulated_ascent_m": 66.2923038219352,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 30.543485967078823,
   "start_distance_m": 269.0,
   "end_distance_m": 274.0,
   "midpoint_distance_m": 271.5,
   "start_elevation_m": 429.72584444495976,
   "end_elevation_m": 431.2530187433137,
   "start_xy": [
    638027.5283779481,
    4568232.209539797
   ],
   "end_xy": [
    638032.5253070111,
    4568232.384753781
   ]
  },
  "max_10m": {
   "gradient_pct": 27.48824659275158,
   "start_distance_m": 265.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 270.0,
   "start_elevation_m": 428.7282358173453,
   "end_elevation_m": 431.47706047662047,
   "start_xy": [
    638023.5308346978,
    4568232.06936861
   ],
   "end_xy": [
    638033.5246928236,
    4568232.419796579
   ]
  },
  "max_20m": {
   "gradient_pct": 23.95092235246068,
   "start_distance_m": 259.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 269.0,
   "start_elevation_m": 427.47003454833794,
   "end_elevation_m": 432.26021901883007,
   "start_xy": [
    638017.5345198223,
    4568231.859111829
   ],
   "end_xy": [
    638037.522236074,
    4568232.559967766
   ]
  },
  "max_25m": {
   "gradient_pct": 22.510146299914595,
   "start_distance_m": 257.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 269.5,
   "start_elevation_m": 427.10228085987285,
   "end_elevation_m": 432.7298174348515,
   "start_xy": [
    638015.5357481971,
    4568231.789026235
   ],
   "end_xy": [
    638040.5203935117,
    4568232.665096156
   ]
  },
  "max_50m": {
   "gradient_pct": 18.538442091844672,
   "start_distance_m": 239.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 264.0,
   "start_elevation_m": 424.53889693350015,
   "end_elevation_m": 433.8081179794225,
   "start_xy": [
    637997.5463726518,
    4568231.189460338
   ],
   "end_xy": [
    638047.5160941997,
    4568232.910395734
   ]
  },
  "max_100m": {
   "gradient_pct": 14.823011722858155,
   "start_distance_m": 200.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 250.0,
   "start_elevation_m": 420.15331283660765,
   "end_elevation_m": 434.9763245594658,
   "start_xy": [
    637958.547449914,
    4568231.4793315055
   ],
   "end_xy": [
    638058.5093381382,
    4568233.2958665
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.0202503628920567,
   "start_distance_m": 360.0,
   "end_distance_m": 365.0,
   "midpoint_distance_m": 362.5,
   "start_elevation_m": 439.47380822539026,
   "end_elevation_m": 439.42279570724565,
   "start_xy": [
    638118.4896539815,
    4568232.4015091825
   ],
   "end_xy": [
    638123.4876407326,
    4568232.259634458
   ]
  },
  "min_10m": {
   "gradient_pct": 2.112583349014585,
   "start_distance_m": 825.0,
   "end_distance_m": 835.0,
   "midpoint_distance_m": 830.0,
   "start_elevation_m": 466.54610383034435,
   "end_elevation_m": 466.7573621652458,
   "start_xy": [
    638578.9085301866,
    4568214.442333232
   ],
   "end_xy": [
    638587.3325440207,
    4568209.053827787
   ]
  },
  "min_20m": {
   "gradient_pct": 2.2938341178272026,
   "start_distance_m": 428.0,
   "end_distance_m": 448.0,
   "midpoint_distance_m": 438.0,
   "start_elevation_m": 443.1356302178925,
   "end_elevation_m": 443.59439704145797,
   "start_xy": [
    638186.4634300985,
    4568231.668607367
   ],
   "end_xy": [
    638206.4522951115,
    4568232.334864784
   ]
  },
  "min_25m": {
   "gradient_pct": 2.4381018234441854,
   "start_distance_m": 443.0,
   "end_distance_m": 468.0,
   "midpoint_distance_m": 455.5,
   "start_elevation_m": 443.510702904744,
   "end_elevation_m": 444.12022836060504,
   "start_xy": [
    638201.4550029833,
    4568232.171342327
   ],
   "end_xy": [
    638226.449620543,
    4568232.6619360065
   ]
  },
  "min_50m": {
   "gradient_pct": 2.5861567064488327,
   "start_distance_m": 425.0,
   "end_distance_m": 475.0,
   "midpoint_distance_m": 450.0,
   "start_elevation_m": 443.03778454684584,
   "end_elevation_m": 444.33086290007026,
   "start_xy": [
    638183.4651155216,
    4568231.568060375
   ],
   "end_xy": [
    638233.4486844441,
    4568232.7764109345
   ]
  },
  "min_100m": {
   "gradient_pct": 2.904743252236244,
   "start_distance_m": 426.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 476.0,
   "start_elevation_m": 443.0725029784336,
   "end_elevation_m": 445.97724623066983,
   "start_xy": [
    638184.4645537139,
    4568231.601576039
   ],
   "end_xy": [
    638284.4378598089,
    4568233.815321136
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.68060286381274,
   "start_distance_m": 270.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 271.0,
   "start_elevation_m": 430.0091015940221,
   "end_elevation_m": 430.7027136512984,
   "start_xy": [
    638028.5277637608,
    4568232.244582594
   ],
   "end_xy": [
    638030.5265353859,
    4568232.314668188
   ]
  },
  "max_3m": {
   "gradient_pct": 33.001970527811864,
   "start_distance_m": 270.0,
   "end_distance_m": 273.0,
   "midpoint_distance_m": 271.5,
   "start_elevation_m": 430.0091015940221,
   "end_elevation_m": 430.9991607098565,
   "start_xy": [
    638028.5277637608,
    4568232.244582594
   ],
   "end_xy": [
    638031.5259211984,
    4568232.349710985
   ]
  }
 },
 "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_x63y457_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T13:19:19+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": [
   "x63y457"
  ],
  "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": "Highland",
  "county": "Pennsylvania"
 }
}