{
 "ocl_version": "0.1.0",
 "name": "Columbia Avenue",
 "slug": "columbia-avenue-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.225045700743976,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 724.0,
   "end_distance_m": 726.0,
   "start_elevation_m": 425.16128561970294,
   "end_elevation_m": 425.6857865337178,
   "min_gradient_pct": -23.599733092572706
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.03286795744945,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 724.0,
   "end_distance_m": 727.0,
   "start_elevation_m": 425.16128561970294,
   "end_elevation_m": 425.9422716584264,
   "min_gradient_pct": -22.73958336376154
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.530700191707183,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 722.0,
   "end_distance_m": 727.0,
   "start_elevation_m": 424.66573664884106,
   "end_elevation_m": 425.9422716584264,
   "min_gradient_pct": -18.36234160969525
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.307851473030837,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 719.0,
   "end_distance_m": 729.0,
   "start_elevation_m": 423.97231486962374,
   "end_elevation_m": 426.4031000169268,
   "min_gradient_pct": -6.748785325944482
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.016711852412527,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 712.0,
   "end_distance_m": 732.0,
   "start_elevation_m": 422.5804688829917,
   "end_elevation_m": 426.9838112534742,
   "min_gradient_pct": -4.527407914629862
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.752837073926685,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 707.0,
   "end_distance_m": 732.0,
   "start_elevation_m": 421.7956019849925,
   "end_elevation_m": 426.9838112534742,
   "min_gradient_pct": -4.540019813973004
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.867161096916334,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 683.0,
   "end_distance_m": 733.0,
   "start_elevation_m": 418.1925505092549,
   "end_elevation_m": 427.12613105771305,
   "min_gradient_pct": -4.0409055865509345
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.798017987828018,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 633.0,
   "end_distance_m": 733.0,
   "start_elevation_m": 412.32811306988503,
   "end_elevation_m": 427.12613105771305,
   "min_gradient_pct": -2.027232051493229
  }
 ],
 "shape": {
  "ascent_concentration": 0.463,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 151.0,
  "shape_class": "stepped"
 },
 "length_m": 736.2782041865299,
 "start_elevation_m": 377.7607294666881,
 "end_elevation_m": 427.44873818647517,
 "endpoint_gain_m": 49.68800871978709,
 "overall_gradient_pct": 6.748537229169296,
 "accumulated_ascent_m": 53.1081858936999,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.530700191707183,
   "start_distance_m": 722.0,
   "end_distance_m": 727.0,
   "midpoint_distance_m": 724.5,
   "start_elevation_m": 424.66573664884106,
   "end_elevation_m": 425.9422716584264,
   "start_xy": [
    441076.8789634883,
    4594735.959145297
   ],
   "end_xy": [
    441077.1825858838,
    4594740.949918127
   ]
  },
  "max_10m": {
   "gradient_pct": 24.307851473030837,
   "start_distance_m": 719.0,
   "end_distance_m": 729.0,
   "midpoint_distance_m": 724.0,
   "start_elevation_m": 423.97231486962374,
   "end_elevation_m": 426.4031000169268,
   "start_xy": [
    441077.10540010134,
    4594732.984394856
   ],
   "end_xy": [
    441077.304034842,
    4594742.946227259
   ]
  },
  "max_20m": {
   "gradient_pct": 22.016711852412527,
   "start_distance_m": 712.0,
   "end_distance_m": 732.0,
   "midpoint_distance_m": 722.0,
   "start_elevation_m": 422.5804688829917,
   "end_elevation_m": 426.9838112534742,
   "start_xy": [
    441078.20111068327,
    4594726.070682515
   ],
   "end_xy": [
    441077.48620827927,
    4594745.940690957
   ]
  },
  "max_25m": {
   "gradient_pct": 20.752837073926685,
   "start_distance_m": 707.0,
   "end_distance_m": 732.0,
   "midpoint_distance_m": 719.5,
   "start_elevation_m": 421.7956019849925,
   "end_elevation_m": 426.9838112534742,
   "start_xy": [
    441078.98376109893,
    4594721.132316559
   ],
   "end_xy": [
    441077.48620827927,
    4594745.940690957
   ]
  },
  "max_50m": {
   "gradient_pct": 17.867161096916334,
   "start_distance_m": 683.0,
   "end_distance_m": 733.0,
   "midpoint_distance_m": 708.0,
   "start_elevation_m": 418.1925505092549,
   "end_elevation_m": 427.12613105771305,
   "start_xy": [
    441082.74048309406,
    4594697.428159964
   ],
   "end_xy": [
    441077.5469327584,
    4594746.938845523
   ]
  },
  "max_100m": {
   "gradient_pct": 14.798017987828018,
   "start_distance_m": 633.0,
   "end_distance_m": 733.0,
   "midpoint_distance_m": 683.0,
   "start_elevation_m": 412.32811306988503,
   "end_elevation_m": 427.12613105771305,
   "start_xy": [
    441090.5669872506,
    4594648.044500393
   ],
   "end_xy": [
    441077.5469327584,
    4594746.938845523
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -18.36234160969525,
   "start_distance_m": 332.0,
   "end_distance_m": 337.0,
   "midpoint_distance_m": 334.5,
   "start_elevation_m": 397.8516631736642,
   "end_elevation_m": 396.9335460931794,
   "start_xy": [
    441151.8282059788,
    4594355.50774098
   ],
   "end_xy": [
    441148.329845352,
    4594359.080061364
   ]
  },
  "min_10m": {
   "gradient_pct": -6.748785325944482,
   "start_distance_m": 328.0,
   "end_distance_m": 338.0,
   "midpoint_distance_m": 333.0,
   "start_elevation_m": 397.6278986157293,
   "end_elevation_m": 396.95302008313485,
   "start_xy": [
    441154.6268944802,
    4594352.649884673
   ],
   "end_xy": [
    441147.63017322664,
    4594359.794525441
   ]
  },
  "min_20m": {
   "gradient_pct": -4.527407914629862,
   "start_distance_m": 400.0,
   "end_distance_m": 420.0,
   "midpoint_distance_m": 410.0,
   "start_elevation_m": 400.12896768180707,
   "end_elevation_m": 399.2234860988811,
   "start_xy": [
    441128.1972214347,
    4594418.497169336
   ],
   "end_xy": [
    441122.12991128647,
    4594437.554654678
   ]
  },
  "min_25m": {
   "gradient_pct": -4.540019813973004,
   "start_distance_m": 403.0,
   "end_distance_m": 428.0,
   "midpoint_distance_m": 415.5,
   "start_elevation_m": 400.00043049244437,
   "end_elevation_m": 398.8654255389511,
   "start_xy": [
    441127.28712491243,
    4594421.355792138
   ],
   "end_xy": [
    441119.7029872272,
    4594445.177648815
   ]
  },
  "min_50m": {
   "gradient_pct": -4.0409055865509345,
   "start_distance_m": 397.0,
   "end_distance_m": 447.0,
   "midpoint_distance_m": 422.0,
   "start_elevation_m": 400.2191125451352,
   "end_elevation_m": 398.19865975185974,
   "start_xy": [
    441129.1073179569,
    4594415.638546535
   ],
   "end_xy": [
    441117.1688486127,
    4594463.985838608
   ]
  },
  "min_100m": {
   "gradient_pct": -2.027232051493229,
   "start_distance_m": 366.0,
   "end_distance_m": 466.0,
   "midpoint_distance_m": 416.0,
   "start_elevation_m": 400.0809600063525,
   "end_elevation_m": 398.05372795485926,
   "start_xy": [
    441138.5116486866,
    4594386.099444254
   ],
   "end_xy": [
    441114.88008992147,
    4594482.847481793
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.225045700743976,
   "start_distance_m": 724.0,
   "end_distance_m": 726.0,
   "midpoint_distance_m": 725.0,
   "start_elevation_m": 425.16128561970294,
   "end_elevation_m": 425.6857865337178,
   "start_xy": [
    441077.0004124465,
    4594737.955454429
   ],
   "end_xy": [
    441077.12186140474,
    4594739.951763561
   ]
  },
  "max_3m": {
   "gradient_pct": 26.03286795744945,
   "start_distance_m": 724.0,
   "end_distance_m": 727.0,
   "midpoint_distance_m": 725.5,
   "start_elevation_m": 425.16128561970294,
   "end_elevation_m": 425.9422716584264,
   "start_xy": [
    441077.0004124465,
    4594737.955454429
   ],
   "end_xy": [
    441077.1825858838,
    4594740.949918127
   ]
  }
 },
 "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa/USGS_1M_18_x44y460_PA_Northcentral_2019_B19.tif"
  ],
  "calculated_at": "2026-09-07T15:34:59+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-band4.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_Northcentral_2019_B19 (collected 2019)",
  "elevation_tile_ids": [
   "x44y460"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_Northcentral_2019_B19: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Clarks Summit",
  "county": "Pennsylvania"
 }
}