{
 "ocl_version": "0.1.0",
 "name": "Redfield Street",
 "slug": "redfield-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.0296003975335,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 456.0,
   "end_distance_m": 458.0,
   "start_elevation_m": 227.04668858036922,
   "end_elevation_m": 227.4872805883199,
   "min_gradient_pct": -7.279199158062966
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.87372142872069,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 456.0,
   "end_distance_m": 459.0,
   "start_elevation_m": 227.04668858036922,
   "end_elevation_m": 227.70290022323084,
   "min_gradient_pct": -7.215547046795716
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.576452756902427,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 456.0,
   "end_distance_m": 461.0,
   "start_elevation_m": 227.04668858036922,
   "end_elevation_m": 228.12551121821434,
   "min_gradient_pct": -7.135016378790624
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.44521348175033,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 451.0,
   "end_distance_m": 461.0,
   "start_elevation_m": 225.9809898700393,
   "end_elevation_m": 228.12551121821434,
   "min_gradient_pct": -6.252807448608735
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.99514968671201,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 444.0,
   "end_distance_m": 464.0,
   "start_elevation_m": 224.5389144455162,
   "end_elevation_m": 228.73794438285861,
   "min_gradient_pct": -4.137672644890813
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.79372176287643,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 439.0,
   "end_distance_m": 464.0,
   "start_elevation_m": 223.5395139421395,
   "end_elevation_m": 228.73794438285861,
   "min_gradient_pct": -2.800565822813951
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.46510066455346,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 415.0,
   "end_distance_m": 465.0,
   "start_elevation_m": 219.19626294321333,
   "end_elevation_m": 228.92881327549006,
   "min_gradient_pct": 1.4218940654965309
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.79167526487828,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 370.0,
   "end_distance_m": 470.0,
   "start_elevation_m": 210.98529470224304,
   "end_elevation_m": 229.77696996712132,
   "min_gradient_pct": 2.975520276251899
  }
 ],
 "shape": {
  "ascent_concentration": 0.551,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 159.0,
  "shape_class": "stepped"
 },
 "length_m": 523.0000000000366,
 "start_elevation_m": 189.6927448656718,
 "end_elevation_m": 230.90701924308962,
 "endpoint_gain_m": 41.21427437741781,
 "overall_gradient_pct": 7.880358389563082,
 "accumulated_ascent_m": 42.05252576842349,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.576452756902427,
   "start_distance_m": 456.0,
   "end_distance_m": 461.0,
   "midpoint_distance_m": 458.5,
   "start_elevation_m": 227.04668858036922,
   "end_elevation_m": 228.12551121821434,
   "start_xy": [
    421430.0581878254,
    4599844.154462594
   ],
   "end_xy": [
    421432.01932501124,
    4599848.753803598
   ]
  },
  "max_10m": {
   "gradient_pct": 21.44521348175033,
   "start_distance_m": 451.0,
   "end_distance_m": 461.0,
   "midpoint_distance_m": 456.0,
   "start_elevation_m": 225.9809898700393,
   "end_elevation_m": 228.12551121821434,
   "start_xy": [
    421428.0982436784,
    4599839.554612715
   ],
   "end_xy": [
    421432.01932501124,
    4599848.753803598
   ]
  },
  "max_20m": {
   "gradient_pct": 20.99514968671201,
   "start_distance_m": 444.0,
   "end_distance_m": 464.0,
   "midpoint_distance_m": 454.0,
   "start_elevation_m": 224.5389144455162,
   "end_elevation_m": 228.73794438285861,
   "start_xy": [
    421425.3522856098,
    4599833.1156915035
   ],
   "end_xy": [
    421433.1961335612,
    4599851.513354276
   ]
  },
  "max_25m": {
   "gradient_pct": 20.79372176287643,
   "start_distance_m": 439.0,
   "end_distance_m": 464.0,
   "midpoint_distance_m": 451.5,
   "start_elevation_m": 223.5395139421395,
   "end_elevation_m": 228.73794438285861,
   "start_xy": [
    421423.39198341017,
    4599828.515994269
   ],
   "end_xy": [
    421433.1961335612,
    4599851.513354276
   ]
  },
  "max_50m": {
   "gradient_pct": 19.46510066455346,
   "start_distance_m": 415.0,
   "end_distance_m": 465.0,
   "midpoint_distance_m": 440.0,
   "start_elevation_m": 219.19626294321333,
   "end_elevation_m": 228.92881327549006,
   "start_xy": [
    421413.85542783525,
    4599806.493498389
   ],
   "end_xy": [
    421433.5881210178,
    4599852.433324838
   ]
  },
  "max_100m": {
   "gradient_pct": 18.79167526487828,
   "start_distance_m": 370.0,
   "end_distance_m": 470.0,
   "midpoint_distance_m": 420.0,
   "start_elevation_m": 210.98529470224304,
   "end_elevation_m": 229.77696996712132,
   "start_xy": [
    421395.13444712944,
    4599765.572540596
   ],
   "end_xy": [
    421435.5492649259,
    4599857.032662582
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.135016378790624,
   "start_distance_m": 518.0,
   "end_distance_m": 523.0,
   "midpoint_distance_m": 520.5,
   "start_elevation_m": 231.26377006202915,
   "end_elevation_m": 230.90701924308962,
   "start_xy": [
    421455.23334134556,
    4599900.746718058
   ],
   "end_xy": [
    421457.8443925375,
    4599905.010801613
   ]
  },
  "min_10m": {
   "gradient_pct": -6.252807448608735,
   "start_distance_m": 513.0,
   "end_distance_m": 523.0,
   "midpoint_distance_m": 518.0,
   "start_elevation_m": 231.5322999879505,
   "end_elevation_m": 230.90701924308962,
   "start_xy": [
    421452.6215660311,
    4599896.483078059
   ],
   "end_xy": [
    421457.8443925375,
    4599905.010801613
   ]
  },
  "min_20m": {
   "gradient_pct": -4.137672644890813,
   "start_distance_m": 503.0,
   "end_distance_m": 523.0,
   "midpoint_distance_m": 513.0,
   "start_elevation_m": 231.73455377206778,
   "end_elevation_m": 230.90701924308962,
   "start_xy": [
    421448.4901636543,
    4599887.389424903
   ],
   "end_xy": [
    421457.8443925375,
    4599905.010801613
   ]
  },
  "min_25m": {
   "gradient_pct": -2.800565822813951,
   "start_distance_m": 498.0,
   "end_distance_m": 523.0,
   "midpoint_distance_m": 510.5,
   "start_elevation_m": 231.6071606987931,
   "end_elevation_m": 230.90701924308962,
   "start_xy": [
    421446.52938019147,
    4599882.789933102
   ],
   "end_xy": [
    421457.8443925375,
    4599905.010801613
   ]
  },
  "min_50m": {
   "gradient_pct": 1.4218940654965309,
   "start_distance_m": 473.0,
   "end_distance_m": 523.0,
   "midpoint_distance_m": 498.0,
   "start_elevation_m": 230.19607221034136,
   "end_elevation_m": 230.90701924308962,
   "start_xy": [
    421436.72522729577,
    4599859.792574266
   ],
   "end_xy": [
    421457.8443925375,
    4599905.010801613
   ]
  },
  "min_100m": {
   "gradient_pct": 2.975520276251899,
   "start_distance_m": 2.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 52.0,
   "start_elevation_m": 189.75636460342878,
   "end_elevation_m": 192.73188487968068,
   "start_xy": [
    421230.21403572947,
    4599438.434043122
   ],
   "end_xy": [
    421283.9307233886,
    4599522.006465096
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.0296003975335,
   "start_distance_m": 456.0,
   "end_distance_m": 458.0,
   "midpoint_distance_m": 457.0,
   "start_elevation_m": 227.04668858036922,
   "end_elevation_m": 227.4872805883199,
   "start_xy": [
    421430.0581878254,
    4599844.154462594
   ],
   "end_xy": [
    421430.8430048189,
    4599845.99404446
   ]
  },
  "max_3m": {
   "gradient_pct": 21.87372142872069,
   "start_distance_m": 456.0,
   "end_distance_m": 459.0,
   "midpoint_distance_m": 457.5,
   "start_elevation_m": 227.04668858036922,
   "end_elevation_m": 227.70290022323084,
   "start_xy": [
    421430.0581878254,
    4599844.154462594
   ],
   "end_xy": [
    421431.235350098,
    4599846.913862475
   ]
  }
 },
 "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": []
 },
 "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_x42y460_PA_Northcentral_2019_B19.tif"
  ],
  "calculated_at": "2026-09-15T02:43:34+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/pennsylvania-2026-09-07.osm.pbf",
  "osm_snapshot": "2026-09-06T20:21:35Z",
  "run_id": "retro-260914",
  "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": [
   "x42y460"
  ],
  "route_cut_m": 523.0,
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_Northcentral_2019_B19: HTTP Error 404: Not Found",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Tunkhannock",
  "county": "Pennsylvania"
 }
}