{
 "ocl_version": "0.1.0",
 "name": "57th Street",
 "slug": "57th-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.927800165283884,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 568.0,
   "end_distance_m": 570.0,
   "start_elevation_m": 304.1757658240697,
   "end_elevation_m": 304.61432182737536,
   "min_gradient_pct": -0.8345233876909219
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.773107937603225,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 567.0,
   "end_distance_m": 570.0,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 304.61432182737536,
   "min_gradient_pct": -0.74932029421196
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.14331483811725,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 567.0,
   "end_distance_m": 572.0,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 305.01829433115313,
   "min_gradient_pct": -0.05158231512382372
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.528930970552324,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 567.0,
   "end_distance_m": 577.0,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 306.0140216863025,
   "min_gradient_pct": 0.7829536219281863
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.177005496000504,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 567.0,
   "end_distance_m": 587.0,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 307.99652968844737,
   "min_gradient_pct": 1.1981284824139493
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.134252801954744,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 567.0,
   "end_distance_m": 592.0,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 308.99469178973595,
   "min_gradient_pct": 1.3213719637697068
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.96283718867221,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 542.0,
   "end_distance_m": 592.0,
   "start_elevation_m": 299.01327319539985,
   "end_elevation_m": 308.99469178973595,
   "min_gradient_pct": 1.9378432327763448
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.723712468421525,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 497.0,
   "end_distance_m": 597.0,
   "start_elevation_m": 291.2058594025322,
   "end_elevation_m": 309.92957187095374,
   "min_gradient_pct": 3.26123651932744
  }
 ],
 "shape": {
  "ascent_concentration": 0.388,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 374.0,
  "shape_class": "sustained"
 },
 "length_m": 926.6974942318996,
 "start_elevation_m": 231.77855289184373,
 "end_elevation_m": 331.43856140747585,
 "endpoint_gain_m": 99.66000851563211,
 "overall_gradient_pct": 10.754319412316539,
 "accumulated_ascent_m": 99.69449810786426,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.14331483811725,
   "start_distance_m": 567.0,
   "end_distance_m": 572.0,
   "midpoint_distance_m": 569.5,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 305.01829433115313,
   "start_xy": [
    589778.3767198742,
    4481911.299712995
   ],
   "end_xy": [
    589783.3721426349,
    4481911.513608864
   ]
  },
  "max_10m": {
   "gradient_pct": 20.528930970552324,
   "start_distance_m": 567.0,
   "end_distance_m": 577.0,
   "midpoint_distance_m": 572.0,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 306.0140216863025,
   "start_xy": [
    589778.3767198742,
    4481911.299712995
   ],
   "end_xy": [
    589788.3675653955,
    4481911.727504731
   ]
  },
  "max_20m": {
   "gradient_pct": 20.177005496000504,
   "start_distance_m": 567.0,
   "end_distance_m": 587.0,
   "midpoint_distance_m": 577.0,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 307.99652968844737,
   "start_xy": [
    589778.3767198742,
    4481911.299712995
   ],
   "end_xy": [
    589798.3584109169,
    4481912.155296467
   ]
  },
  "max_25m": {
   "gradient_pct": 20.134252801954744,
   "start_distance_m": 567.0,
   "end_distance_m": 592.0,
   "midpoint_distance_m": 579.5,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 308.99469178973595,
   "start_xy": [
    589778.3767198742,
    4481911.299712995
   ],
   "end_xy": [
    589803.3538336775,
    4481912.369192336
   ]
  },
  "max_50m": {
   "gradient_pct": 19.96283718867221,
   "start_distance_m": 542.0,
   "end_distance_m": 592.0,
   "midpoint_distance_m": 567.0,
   "start_elevation_m": 299.01327319539985,
   "end_elevation_m": 308.99469178973595,
   "start_xy": [
    589753.3996060711,
    4481910.230233654
   ],
   "end_xy": [
    589803.3538336775,
    4481912.369192336
   ]
  },
  "max_100m": {
   "gradient_pct": 18.723712468421525,
   "start_distance_m": 497.0,
   "end_distance_m": 597.0,
   "midpoint_distance_m": 547.0,
   "start_elevation_m": 291.2058594025322,
   "end_elevation_m": 309.92957187095374,
   "start_xy": [
    589708.4408012251,
    4481908.3051708415
   ],
   "end_xy": [
    589808.3492564382,
    4481912.583088204
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.05158231512382372,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 231.77855289184373,
   "end_elevation_m": 231.77597377608754,
   "start_xy": [
    589304.838,
    4482140.34
   ],
   "end_xy": [
    589308.0937691365,
    4482136.545271113
   ]
  },
  "min_10m": {
   "gradient_pct": 0.7829536219281863,
   "start_distance_m": 869.0,
   "end_distance_m": 879.0,
   "midpoint_distance_m": 874.0,
   "start_elevation_m": 329.0140250405551,
   "end_elevation_m": 329.09232040274793,
   "start_xy": [
    590004.7969737569,
    4481941.554019625
   ],
   "end_xy": [
    590013.6929854774,
    4481936.986957824
   ]
  },
  "min_20m": {
   "gradient_pct": 1.1981284824139493,
   "start_distance_m": 861.0,
   "end_distance_m": 881.0,
   "midpoint_distance_m": 871.0,
   "start_elevation_m": 328.8757041106162,
   "end_elevation_m": 329.115329807099,
   "start_xy": [
    589997.6885209183,
    4481945.224155623
   ],
   "end_xy": [
    590015.481931233,
    4481936.092717663
   ]
  },
  "min_25m": {
   "gradient_pct": 1.3213719637697068,
   "start_distance_m": 856.0,
   "end_distance_m": 881.0,
   "midpoint_distance_m": 868.5,
   "start_elevation_m": 328.78498681615656,
   "end_elevation_m": 329.115329807099,
   "start_xy": [
    589993.2457378941,
    4481947.517990621
   ],
   "end_xy": [
    590015.481931233,
    4481936.092717663
   ]
  },
  "min_50m": {
   "gradient_pct": 1.9378432327763448,
   "start_distance_m": 836.0,
   "end_distance_m": 886.0,
   "midpoint_distance_m": 861.0,
   "start_elevation_m": 328.2772947053288,
   "end_elevation_m": 329.246216321717,
   "start_xy": [
    589975.4746057976,
    4481956.693330616
   ],
   "end_xy": [
    590019.7982161371,
    4481934.325098391
   ]
  },
  "min_100m": {
   "gradient_pct": 3.26123651932744,
   "start_distance_m": 786.0,
   "end_distance_m": 886.0,
   "midpoint_distance_m": 836.0,
   "start_elevation_m": 325.98497980238955,
   "end_elevation_m": 329.246216321717,
   "start_xy": [
    589931.0467755563,
    4481979.6316806
   ],
   "end_xy": [
    590019.7982161371,
    4481934.325098391
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.927800165283884,
   "start_distance_m": 568.0,
   "end_distance_m": 570.0,
   "midpoint_distance_m": 569.0,
   "start_elevation_m": 304.1757658240697,
   "end_elevation_m": 304.61432182737536,
   "start_xy": [
    589779.3758044264,
    4481911.342492169
   ],
   "end_xy": [
    589781.3739735306,
    4481911.428050516
   ]
  },
  "max_3m": {
   "gradient_pct": 21.773107937603225,
   "start_distance_m": 567.0,
   "end_distance_m": 570.0,
   "midpoint_distance_m": 568.5,
   "start_elevation_m": 303.96112858924727,
   "end_elevation_m": 304.61432182737536,
   "start_xy": [
    589778.3767198742,
    4481911.299712995
   ],
   "end_xy": [
    589781.3739735306,
    4481911.428050516
   ]
  }
 },
 "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_x58y449_PA_WesternPA_2019_D20.tif",
   "data/cache/usa/pa-west/USGS_1M_17_x59y449_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T13:59:50+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": [
   "x58y449",
   "x59y449"
  ],
  "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": "Pittsburgh",
  "county": "Pennsylvania"
 }
}