{
 "ocl_version": "0.1.0",
 "name": "3rd Street",
 "slug": "3rd-street-3",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.24823911638765,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 129.0,
   "end_distance_m": 131.0,
   "start_elevation_m": 245.47792344082742,
   "end_elevation_m": 246.02288822315518,
   "min_gradient_pct": 1.0177478236116144
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.774704815346695,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 128.0,
   "end_distance_m": 131.0,
   "start_elevation_m": 245.21964707869478,
   "end_elevation_m": 246.02288822315518,
   "min_gradient_pct": 1.2477082882090447
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.920871514667283,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 154.0,
   "end_distance_m": 159.0,
   "start_elevation_m": 251.79964198299996,
   "end_elevation_m": 253.09568555873332,
   "min_gradient_pct": 1.5891468527513553
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.712611255582658,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 149.0,
   "end_distance_m": 159.0,
   "start_elevation_m": 250.52442443317506,
   "end_elevation_m": 253.09568555873332,
   "min_gradient_pct": 2.245268731086014
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.488495135066245,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 140.0,
   "end_distance_m": 160.0,
   "start_elevation_m": 248.24036947670666,
   "end_elevation_m": 253.3380685037199,
   "min_gradient_pct": 2.5550255969061197
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.29590406513114,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 128.0,
   "end_distance_m": 153.0,
   "start_elevation_m": 245.21964707869478,
   "end_elevation_m": 251.54362309497756,
   "min_gradient_pct": 2.6612722343212454
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.00345037060396,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 113.0,
   "end_distance_m": 163.0,
   "start_elevation_m": 241.5539789661374,
   "end_elevation_m": 254.0557041514394,
   "min_gradient_pct": 3.005501246979179
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.9918154315217,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 80.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 234.0282173372299,
   "end_elevation_m": 256.0200327687516,
   "min_gradient_pct": 7.140116943091073
  }
 ],
 "shape": {
  "ascent_concentration": 0.463,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 99.0,
  "shape_class": "stepped"
 },
 "length_m": 259.8510501675245,
 "start_elevation_m": 231.37790156215175,
 "end_elevation_m": 266.0037295558143,
 "endpoint_gain_m": 34.62582799366254,
 "overall_gradient_pct": 13.325259979260991,
 "accumulated_ascent_m": 34.62582799366254,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.920871514667283,
   "start_distance_m": 154.0,
   "end_distance_m": 159.0,
   "midpoint_distance_m": 156.5,
   "start_elevation_m": 251.79964198299996,
   "end_elevation_m": 253.09568555873332,
   "start_xy": [
    562760.6491457613,
    4504672.892590239
   ],
   "end_xy": [
    562764.5923497124,
    4504675.966861307
   ]
  },
  "max_10m": {
   "gradient_pct": 25.712611255582658,
   "start_distance_m": 149.0,
   "end_distance_m": 159.0,
   "midpoint_distance_m": 154.0,
   "start_elevation_m": 250.52442443317506,
   "end_elevation_m": 253.09568555873332,
   "start_xy": [
    562756.7059418102,
    4504669.81831917
   ],
   "end_xy": [
    562764.5923497124,
    4504675.966861307
   ]
  },
  "max_20m": {
   "gradient_pct": 25.488495135066245,
   "start_distance_m": 140.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 150.0,
   "start_elevation_m": 248.24036947670666,
   "end_elevation_m": 253.3380685037199,
   "start_xy": [
    562749.6081746982,
    4504664.284631248
   ],
   "end_xy": [
    562765.3809905027,
    4504676.5817155205
   ]
  },
  "max_25m": {
   "gradient_pct": 25.29590406513114,
   "start_distance_m": 128.0,
   "end_distance_m": 153.0,
   "midpoint_distance_m": 140.5,
   "start_elevation_m": 245.21964707869478,
   "end_elevation_m": 251.54362309497756,
   "start_xy": [
    562740.1444852155,
    4504656.906380684
   ],
   "end_xy": [
    562759.8605049711,
    4504672.277736025
   ]
  },
  "max_50m": {
   "gradient_pct": 25.00345037060396,
   "start_distance_m": 113.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 138.0,
   "start_elevation_m": 241.5539789661374,
   "end_elevation_m": 254.0557041514394,
   "start_xy": [
    562728.0559520114,
    4504648.027896615
   ],
   "end_xy": [
    562767.7469128732,
    4504678.426278161
   ]
  },
  "max_100m": {
   "gradient_pct": 21.9918154315217,
   "start_distance_m": 80.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 130.0,
   "start_elevation_m": 234.0282173372299,
   "end_elevation_m": 256.0200327687516,
   "start_xy": [
    562701.338767489,
    4504628.658021778
   ],
   "end_xy": [
    562781.4211142879,
    4504688.519835547
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.5891468527513553,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 231.37790156215175,
   "end_elevation_m": 231.45735890478932,
   "start_xy": [
    562744.369,
    4504565.752
   ],
   "end_xy": [
    562741.3441676127,
    4504569.733254706
   ]
  },
  "min_10m": {
   "gradient_pct": 2.245268731086014,
   "start_distance_m": 1.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 6.0,
   "start_elevation_m": 231.39810758640445,
   "end_elevation_m": 231.62263445951305,
   "start_xy": [
    562743.7640335225,
    4504566.548250942
   ],
   "end_xy": [
    562737.7143687479,
    4504574.510760352
   ]
  },
  "min_20m": {
   "gradient_pct": 2.5550255969061197,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 231.37790156215175,
   "end_elevation_m": 231.88890668153297,
   "start_xy": [
    562744.369,
    4504565.752
   ],
   "end_xy": [
    562732.2696704508,
    4504581.677018822
   ]
  },
  "min_25m": {
   "gradient_pct": 2.6612722343212454,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 231.37790156215175,
   "end_elevation_m": 232.04321962073206,
   "start_xy": [
    562744.369,
    4504565.752
   ],
   "end_xy": [
    562729.2448380636,
    4504585.658273527
   ]
  },
  "min_50m": {
   "gradient_pct": 3.005501246979179,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 231.37790156215175,
   "end_elevation_m": 232.88065218564134,
   "start_xy": [
    562744.369,
    4504565.752
   ],
   "end_xy": [
    562714.1206761273,
    4504605.564547054
   ]
  },
  "min_100m": {
   "gradient_pct": 7.140116943091073,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 231.37790156215175,
   "end_elevation_m": 238.51801850524282,
   "start_xy": [
    562744.369,
    4504565.752
   ],
   "end_xy": [
    562717.5310005328,
    4504640.397339861
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.24823911638765,
   "start_distance_m": 129.0,
   "end_distance_m": 131.0,
   "midpoint_distance_m": 130.0,
   "start_elevation_m": 245.47792344082742,
   "end_elevation_m": 246.02288822315518,
   "start_xy": [
    562740.9331260058,
    4504657.521234898
   ],
   "end_xy": [
    562742.5104075862,
    4504658.750943325
   ]
  },
  "max_3m": {
   "gradient_pct": 26.774704815346695,
   "start_distance_m": 128.0,
   "end_distance_m": 131.0,
   "midpoint_distance_m": 129.5,
   "start_elevation_m": 245.21964707869478,
   "end_elevation_m": 246.02288822315518,
   "start_xy": [
    562740.1444852155,
    4504656.906380684
   ],
   "end_xy": [
    562742.5104075862,
    4504658.750943325
   ]
  }
 },
 "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_x56y451_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T14:24:47+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": [
   "x56y451"
  ],
  "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": "Freedom",
  "county": "Pennsylvania"
 }
}