{
 "ocl_version": "0.1.0",
 "name": "Thorn Street",
 "slug": "thorn-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.12306510915505,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 300.0,
   "end_distance_m": 302.0,
   "start_elevation_m": 267.88406638494604,
   "end_elevation_m": 268.34652768712914,
   "min_gradient_pct": 0.6703973192756507
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.937338381003276,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 299.0,
   "end_distance_m": 302.0,
   "start_elevation_m": 267.65840753569904,
   "end_elevation_m": 268.34652768712914,
   "min_gradient_pct": 0.8676293333394369
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.990054807177103,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 297.0,
   "end_distance_m": 302.0,
   "start_elevation_m": 267.1970249467703,
   "end_elevation_m": 268.34652768712914,
   "min_gradient_pct": 1.2153376515470882
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.399006654686104,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 297.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 267.1970249467703,
   "end_elevation_m": 269.4369256122389,
   "min_gradient_pct": 2.4904500485482117
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.952717473159623,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 287.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 265.24638211760697,
   "end_elevation_m": 269.4369256122389,
   "min_gradient_pct": 3.6943320297058335
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.32433588151457,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 283.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 264.53144372725285,
   "end_elevation_m": 269.6125276976315,
   "min_gradient_pct": 3.9043785723921474
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.677418024995063,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 257.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 260.09821659974136,
   "end_elevation_m": 269.4369256122389,
   "min_gradient_pct": 5.446416534379637
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.142214043353507,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 208.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 254.470313654278,
   "end_elevation_m": 269.6125276976315,
   "min_gradient_pct": 8.483149526388956
  }
 ],
 "shape": {
  "ascent_concentration": 0.323,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 69.0,
  "shape_class": "sustained"
 },
 "length_m": 308.5715551120753,
 "start_elevation_m": 231.00611632323844,
 "end_elevation_m": 269.7054030407463,
 "endpoint_gain_m": 38.699286717507874,
 "overall_gradient_pct": 12.541430367245622,
 "accumulated_ascent_m": 38.699286717507874,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.990054807177103,
   "start_distance_m": 297.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 299.5,
   "start_elevation_m": 267.1970249467703,
   "end_elevation_m": 268.34652768712914,
   "start_xy": [
    569720.9727492821,
    4485752.3114560805
   ],
   "end_xy": [
    569718.880226179,
    4485747.770382742
   ]
  },
  "max_10m": {
   "gradient_pct": 22.399006654686104,
   "start_distance_m": 297.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 302.0,
   "start_elevation_m": 267.1970249467703,
   "end_elevation_m": 269.4369256122389,
   "start_xy": [
    569720.9727492821,
    4485752.3114560805
   ],
   "end_xy": [
    569716.7877030759,
    4485743.229309404
   ]
  },
  "max_20m": {
   "gradient_pct": 20.952717473159623,
   "start_distance_m": 287.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 297.0,
   "start_elevation_m": 265.24638211760697,
   "end_elevation_m": 269.4369256122389,
   "start_xy": [
    569725.5852219746,
    4485761.180594382
   ],
   "end_xy": [
    569716.7877030759,
    4485743.229309404
   ]
  },
  "max_25m": {
   "gradient_pct": 20.32433588151457,
   "start_distance_m": 283.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 295.5,
   "start_elevation_m": 264.53144372725285,
   "end_elevation_m": 269.6125276976315,
   "start_xy": [
    569727.4778001809,
    4485764.704533617
   ],
   "end_xy": [
    569716.3691984554,
    4485742.321094736
   ]
  },
  "max_50m": {
   "gradient_pct": 18.677418024995063,
   "start_distance_m": 257.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 282.0,
   "start_elevation_m": 260.09821659974136,
   "end_elevation_m": 269.4369256122389,
   "start_xy": [
    569739.7795585219,
    4485787.610138645
   ],
   "end_xy": [
    569716.7877030759,
    4485743.229309404
   ]
  },
  "max_100m": {
   "gradient_pct": 15.142214043353507,
   "start_distance_m": 208.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 258.0,
   "start_elevation_m": 254.470313654278,
   "end_elevation_m": 269.6125276976315,
   "start_xy": [
    569762.9663988466,
    4485830.776913236
   ],
   "end_xy": [
    569716.3691984554,
    4485742.321094736
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.2153376515470882,
   "start_distance_m": 85.0,
   "end_distance_m": 90.0,
   "midpoint_distance_m": 87.5,
   "start_elevation_m": 239.41077474401544,
   "end_elevation_m": 239.4715416265928,
   "start_xy": [
    569815.5913254339,
    4485937.607383513
   ],
   "end_xy": [
    569818.8044549465,
    4485934.729361374
   ]
  },
  "min_10m": {
   "gradient_pct": 2.4904500485482117,
   "start_distance_m": 81.0,
   "end_distance_m": 91.0,
   "midpoint_distance_m": 86.0,
   "start_elevation_m": 239.2615920657773,
   "end_elevation_m": 239.51063707063213,
   "start_xy": [
    569812.1680046282,
    4485939.6764109805
   ],
   "end_xy": [
    569818.331276116,
    4485933.848394976
   ]
  },
  "min_20m": {
   "gradient_pct": 3.6943320297058335,
   "start_distance_m": 71.0,
   "end_distance_m": 91.0,
   "midpoint_distance_m": 81.0,
   "start_elevation_m": 238.77177066469096,
   "end_elevation_m": 239.51063707063213,
   "start_xy": [
    569803.8936960632,
    4485945.284946203
   ],
   "end_xy": [
    569818.331276116,
    4485933.848394976
   ]
  },
  "min_25m": {
   "gradient_pct": 3.9043785723921474,
   "start_distance_m": 66.0,
   "end_distance_m": 91.0,
   "midpoint_distance_m": 78.5,
   "start_elevation_m": 238.5345424275341,
   "end_elevation_m": 239.51063707063213,
   "start_xy": [
    569799.798582028,
    4485948.153751013
   ],
   "end_xy": [
    569818.331276116,
    4485933.848394976
   ]
  },
  "min_50m": {
   "gradient_pct": 5.446416534379637,
   "start_distance_m": 44.0,
   "end_distance_m": 94.0,
   "midpoint_distance_m": 69.0,
   "start_elevation_m": 237.02563621085176,
   "end_elevation_m": 239.74884447804158,
   "start_xy": [
    569781.7800802728,
    4485960.7764921775
   ],
   "end_xy": [
    569816.9117396243,
    4485931.205495782
   ]
  },
  "min_100m": {
   "gradient_pct": 8.483149526388956,
   "start_distance_m": 46.0,
   "end_distance_m": 146.0,
   "midpoint_distance_m": 96.0,
   "start_elevation_m": 237.23622074832576,
   "end_elevation_m": 245.71937027471472,
   "start_xy": [
    569783.4181258869,
    4485959.628970253
   ],
   "end_xy": [
    569792.3064404366,
    4485885.395243088
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.12306510915505,
   "start_distance_m": 300.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 301.0,
   "start_elevation_m": 267.88406638494604,
   "end_elevation_m": 268.34652768712914,
   "start_xy": [
    569719.7172354204,
    4485749.586812077
   ],
   "end_xy": [
    569718.880226179,
    4485747.770382742
   ]
  },
  "max_3m": {
   "gradient_pct": 22.937338381003276,
   "start_distance_m": 299.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 300.5,
   "start_elevation_m": 267.65840753569904,
   "end_elevation_m": 268.34652768712914,
   "start_xy": [
    569720.1357400409,
    4485750.495026745
   ],
   "end_xy": [
    569718.880226179,
    4485747.770382742
   ]
  }
 },
 "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",
   "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_x56y449_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T10:27:53+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": [
   "x56y449"
  ],
  "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": "Moon",
  "county": "Pennsylvania"
 }
}