{
 "ocl_version": "0.1.0",
 "name": "Brighton Street",
 "slug": "brighton-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.992381085558122,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 21.0,
   "end_distance_m": 23.0,
   "start_elevation_m": 288.31697746214377,
   "end_elevation_m": 288.77682508385493,
   "min_gradient_pct": -15.935263941821631
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.64519467521306,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 20.0,
   "end_distance_m": 23.0,
   "start_elevation_m": 288.09746924359854,
   "end_elevation_m": 288.77682508385493,
   "min_gradient_pct": -15.77156047991366
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.330208196733565,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 17.0,
   "end_distance_m": 22.0,
   "start_elevation_m": 287.43948133681005,
   "end_elevation_m": 288.5559917466467,
   "min_gradient_pct": -15.528438042800872
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.145730859713808,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 19.0,
   "end_distance_m": 29.0,
   "start_elevation_m": 287.8819694327,
   "end_elevation_m": 290.09654251867136,
   "min_gradient_pct": -14.851995578735568
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.94588628824249,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 9.0,
   "end_distance_m": 29.0,
   "start_elevation_m": 285.70736526102286,
   "end_elevation_m": 290.09654251867136,
   "min_gradient_pct": -11.79014119664032
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.79224941880193,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 9.0,
   "end_distance_m": 34.0,
   "start_elevation_m": 285.70736526102286,
   "end_elevation_m": 291.15542761572334,
   "min_gradient_pct": -10.38396256666374
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.023910742692124,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 8.0,
   "end_distance_m": 58.0,
   "start_elevation_m": 285.50021726970357,
   "end_elevation_m": 295.51217264104963,
   "min_gradient_pct": -6.090136958311518
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.90872260043176,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 7.0,
   "end_distance_m": 107.0,
   "start_elevation_m": 285.3355699643803,
   "end_elevation_m": 304.24429256481204,
   "min_gradient_pct": -1.0330790453732561
  }
 ],
 "shape": {
  "ascent_concentration": 0.371,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 115.0,
  "shape_class": "sustained"
 },
 "length_m": 550.1049585067311,
 "start_elevation_m": 284.85809237216455,
 "end_elevation_m": 341.4780479537303,
 "endpoint_gain_m": 56.61995558156576,
 "overall_gradient_pct": 10.292573209167493,
 "accumulated_ascent_m": 59.71667455477012,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.330208196733565,
   "start_distance_m": 17.0,
   "end_distance_m": 22.0,
   "midpoint_distance_m": 19.5,
   "start_elevation_m": 287.43948133681005,
   "end_elevation_m": 288.5559917466467,
   "start_xy": [
    598559.8162308373,
    4473540.8173766285
   ],
   "end_xy": [
    598563.3572000555,
    4473544.347466853
   ]
  },
  "max_10m": {
   "gradient_pct": 22.145730859713808,
   "start_distance_m": 19.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 24.0,
   "start_elevation_m": 287.8819694327,
   "end_elevation_m": 290.09654251867136,
   "start_xy": [
    598561.2326185246,
    4473542.229412719
   ],
   "end_xy": [
    598568.3145569611,
    4473549.2895931685
   ]
  },
  "max_20m": {
   "gradient_pct": 21.94588628824249,
   "start_distance_m": 9.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 19.0,
   "start_elevation_m": 285.70736526102286,
   "end_elevation_m": 290.09654251867136,
   "start_xy": [
    598554.1506800881,
    4473535.169232269
   ],
   "end_xy": [
    598568.3145569611,
    4473549.2895931685
   ]
  },
  "max_25m": {
   "gradient_pct": 21.79224941880193,
   "start_distance_m": 9.0,
   "end_distance_m": 34.0,
   "midpoint_distance_m": 21.5,
   "start_elevation_m": 285.70736526102286,
   "end_elevation_m": 291.15542761572334,
   "start_xy": [
    598554.1506800881,
    4473535.169232269
   ],
   "end_xy": [
    598571.8555261793,
    4473552.819683393
   ]
  },
  "max_50m": {
   "gradient_pct": 20.023910742692124,
   "start_distance_m": 8.0,
   "end_distance_m": 58.0,
   "midpoint_distance_m": 33.0,
   "start_elevation_m": 285.50021726970357,
   "end_elevation_m": 295.51217264104963,
   "start_xy": [
    598553.4424862445,
    4473534.463214224
   ],
   "end_xy": [
    598588.9380402899,
    4473569.677370637
   ]
  },
  "max_100m": {
   "gradient_pct": 18.90872260043176,
   "start_distance_m": 7.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 57.0,
   "start_elevation_m": 285.3355699643803,
   "end_elevation_m": 304.24429256481204,
   "start_xy": [
    598552.7342924009,
    4473533.75719618
   ],
   "end_xy": [
    598623.8870249046,
    4473604.022217034
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.528438042800872,
   "start_distance_m": 328.0,
   "end_distance_m": 333.0,
   "midpoint_distance_m": 330.5,
   "start_elevation_m": 318.348615924248,
   "end_elevation_m": 317.57219402210796,
   "start_xy": [
    598548.5239713708,
    4473772.929779928
   ],
   "end_xy": [
    598545.3436809614,
    4473776.787985847
   ]
  },
  "min_10m": {
   "gradient_pct": -14.851995578735568,
   "start_distance_m": 324.0,
   "end_distance_m": 334.0,
   "midpoint_distance_m": 329.0,
   "start_elevation_m": 318.93400811409407,
   "end_elevation_m": 317.4488085562205,
   "start_xy": [
    598551.0682036983,
    4473769.843215194
   ],
   "end_xy": [
    598544.7076228795,
    4473777.559627031
   ]
  },
  "min_20m": {
   "gradient_pct": -11.79014119664032,
   "start_distance_m": 315.0,
   "end_distance_m": 335.0,
   "midpoint_distance_m": 325.0,
   "start_elevation_m": 319.73301804739253,
   "end_elevation_m": 317.37498980806447,
   "start_xy": [
    598556.7927264351,
    4473762.89844454
   ],
   "end_xy": [
    598544.0715647977,
    4473778.331268215
   ]
  },
  "min_25m": {
   "gradient_pct": -10.38396256666374,
   "start_distance_m": 311.0,
   "end_distance_m": 336.0,
   "midpoint_distance_m": 323.5,
   "start_elevation_m": 319.91316630505503,
   "end_elevation_m": 317.3171756633891,
   "start_xy": [
    598559.3369587626,
    4473759.811879804
   ],
   "end_xy": [
    598543.4355067158,
    4473779.102909398
   ]
  },
  "min_50m": {
   "gradient_pct": -6.090136958311518,
   "start_distance_m": 290.0,
   "end_distance_m": 340.0,
   "midpoint_distance_m": 315.0,
   "start_elevation_m": 320.405433625157,
   "end_elevation_m": 317.36036514600124,
   "start_xy": [
    598572.6941784818,
    4473743.607414945
   ],
   "end_xy": [
    598540.8912743883,
    4473782.189474134
   ]
  },
  "min_100m": {
   "gradient_pct": -1.0330790453732561,
   "start_distance_m": 241.0,
   "end_distance_m": 341.0,
   "midpoint_distance_m": 291.0,
   "start_elevation_m": 318.4025341506523,
   "end_elevation_m": 317.36945510527903,
   "start_xy": [
    598603.2819138973,
    4473705.328650226
   ],
   "end_xy": [
    598540.2552163064,
    4473782.961115317
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.992381085558122,
   "start_distance_m": 21.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 22.0,
   "start_elevation_m": 288.31697746214377,
   "end_elevation_m": 288.77682508385493,
   "start_xy": [
    598562.6490062119,
    4473543.641448809
   ],
   "end_xy": [
    598564.0653938992,
    4473545.053484899
   ]
  },
  "max_3m": {
   "gradient_pct": 22.64519467521306,
   "start_distance_m": 20.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 21.5,
   "start_elevation_m": 288.09746924359854,
   "end_elevation_m": 288.77682508385493,
   "start_xy": [
    598561.9408123682,
    4473542.935430764
   ],
   "end_xy": [
    598564.0653938992,
    4473545.053484899
   ]
  }
 },
 "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_x59y448_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T14:45:56+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": [
   "x59y448"
  ],
  "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": "Chalfant",
  "county": "Pennsylvania"
 }
}