{
 "ocl_version": "0.1.0",
 "name": "Phillips Drive",
 "slug": "phillips-drive",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.597690468278643,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 351.0,
   "end_distance_m": 353.0,
   "start_elevation_m": 259.9598035699539,
   "end_elevation_m": 260.4317573793195,
   "min_gradient_pct": -10.713973834613455
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.228562806091684,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 350.0,
   "end_distance_m": 353.0,
   "start_elevation_m": 259.73490049513674,
   "end_elevation_m": 260.4317573793195,
   "min_gradient_pct": -10.71851070965503
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.81850960219458,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 352.0,
   "end_distance_m": 357.0,
   "start_elevation_m": 260.1976296873727,
   "end_elevation_m": 261.3385551674824,
   "min_gradient_pct": -10.465867912631097
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.532849708403546,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 348.0,
   "end_distance_m": 358.0,
   "start_elevation_m": 259.30592690891257,
   "end_elevation_m": 261.5592118797529,
   "min_gradient_pct": -10.001268232394693
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.777652283008138,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 339.0,
   "end_distance_m": 359.0,
   "start_elevation_m": 257.4106749119574,
   "end_elevation_m": 261.76620536855904,
   "min_gradient_pct": -7.984900040965215
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.507188274390046,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 338.0,
   "end_distance_m": 363.0,
   "start_elevation_m": 257.20593108301216,
   "end_elevation_m": 262.5827281516097,
   "min_gradient_pct": -6.524620740057003
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.81259582627274,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 314.0,
   "end_distance_m": 364.0,
   "start_elevation_m": 252.37355167455053,
   "end_elevation_m": 262.7798495876869,
   "min_gradient_pct": -2.6843927357466555
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.48984979746328,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 278.0,
   "end_distance_m": 378.0,
   "start_elevation_m": 246.12846969673345,
   "end_elevation_m": 265.6183194941967,
   "min_gradient_pct": 2.2984188203389806
  }
 ],
 "shape": {
  "ascent_concentration": 0.453,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 247.0,
  "shape_class": "stepped"
 },
 "length_m": 503.9104699766557,
 "start_elevation_m": 232.7866965871553,
 "end_elevation_m": 283.8783897052093,
 "endpoint_gain_m": 51.091693118054025,
 "overall_gradient_pct": 10.139041786613586,
 "accumulated_ascent_m": 52.735360890519274,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.81850960219458,
   "start_distance_m": 352.0,
   "end_distance_m": 357.0,
   "midpoint_distance_m": 354.5,
   "start_elevation_m": 260.1976296873727,
   "end_elevation_m": 261.3385551674824,
   "start_xy": [
    607702.6873506916,
    4495104.068067104
   ],
   "end_xy": [
    607705.2949310907,
    4495108.334274373
   ]
  },
  "max_10m": {
   "gradient_pct": 22.532849708403546,
   "start_distance_m": 348.0,
   "end_distance_m": 358.0,
   "midpoint_distance_m": 353.0,
   "start_elevation_m": 259.30592690891257,
   "end_elevation_m": 261.5592118797529,
   "start_xy": [
    607700.6012863724,
    4495100.655101289
   ],
   "end_xy": [
    607705.8164471705,
    4495109.187515827
   ]
  },
  "max_20m": {
   "gradient_pct": 21.777652283008138,
   "start_distance_m": 339.0,
   "end_distance_m": 359.0,
   "midpoint_distance_m": 349.0,
   "start_elevation_m": 257.4106749119574,
   "end_elevation_m": 261.76620536855904,
   "start_xy": [
    607695.9076416543,
    4495092.975928204
   ],
   "end_xy": [
    607706.4468984253,
    4495109.956108713
   ]
  },
  "max_25m": {
   "gradient_pct": 21.507188274390046,
   "start_distance_m": 338.0,
   "end_distance_m": 363.0,
   "midpoint_distance_m": 350.5,
   "start_elevation_m": 257.20593108301216,
   "end_elevation_m": 262.5827281516097,
   "start_xy": [
    607695.3861255745,
    4495092.12268675
   ],
   "end_xy": [
    607709.2387755401,
    4495112.820619523
   ]
  },
  "max_50m": {
   "gradient_pct": 20.81259582627274,
   "start_distance_m": 314.0,
   "end_distance_m": 364.0,
   "midpoint_distance_m": 339.0,
   "start_elevation_m": 252.37355167455053,
   "end_elevation_m": 262.7798495876869,
   "start_xy": [
    607682.8697396591,
    4495071.644891859
   ],
   "end_xy": [
    607709.9367448188,
    4495113.536747225
   ]
  },
  "max_100m": {
   "gradient_pct": 19.48984979746328,
   "start_distance_m": 278.0,
   "end_distance_m": 378.0,
   "midpoint_distance_m": 328.0,
   "start_elevation_m": 246.12846969673345,
   "end_elevation_m": 265.6183194941967,
   "start_xy": [
    607683.4198758058,
    4495040.215955578
   ],
   "end_xy": [
    607720.6773506948,
    4495122.376789807
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.465867912631097,
   "start_distance_m": 14.0,
   "end_distance_m": 19.0,
   "midpoint_distance_m": 16.5,
   "start_elevation_m": 232.43637288438703,
   "end_elevation_m": 231.91307948875547,
   "start_xy": [
    607923.4043521673,
    4495115.526812071
   ],
   "end_xy": [
    607918.6180556176,
    4495116.784091279
   ]
  },
  "min_10m": {
   "gradient_pct": -10.001268232394693,
   "start_distance_m": 14.0,
   "end_distance_m": 24.0,
   "midpoint_distance_m": 19.0,
   "start_elevation_m": 232.43637288438703,
   "end_elevation_m": 231.43624606114756,
   "start_xy": [
    607923.4043521673,
    4495115.526812071
   ],
   "end_xy": [
    607913.701362025,
    4495115.875177577
   ]
  },
  "min_20m": {
   "gradient_pct": -7.984900040965215,
   "start_distance_m": 6.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 16.0,
   "start_elevation_m": 232.92200261384468,
   "end_elevation_m": 231.32502260565164,
   "start_xy": [
    607927.8081186824,
    4495109.030212366
   ],
   "end_xy": [
    607911.8036973805,
    4495115.323500928
   ]
  },
  "min_25m": {
   "gradient_pct": -6.524620740057003,
   "start_distance_m": 4.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 16.5,
   "start_elevation_m": 232.93925882234188,
   "end_elevation_m": 231.30810363732763,
   "start_xy": [
    607928.8380791217,
    4495107.315808244
   ],
   "end_xy": [
    607909.2009155779,
    4495113.831680936
   ]
  },
  "min_50m": {
   "gradient_pct": -2.6843927357466555,
   "start_distance_m": 3.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 28.0,
   "start_elevation_m": 232.9184598932977,
   "end_elevation_m": 231.57626352542437,
   "start_xy": [
    607929.3530593412,
    4495106.4586061835
   ],
   "end_xy": [
    607889.1850947911,
    4495100.608529307
   ]
  },
  "min_100m": {
   "gradient_pct": 2.2984188203389806,
   "start_distance_m": 3.0,
   "end_distance_m": 103.0,
   "midpoint_distance_m": 53.0,
   "start_elevation_m": 232.9184598932977,
   "end_elevation_m": 235.21687871363667,
   "start_xy": [
    607929.3530593412,
    4495106.4586061835
   ],
   "end_xy": [
    607845.861570263,
    4495075.943533806
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.597690468278643,
   "start_distance_m": 351.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 352.0,
   "start_elevation_m": 259.9598035699539,
   "end_elevation_m": 260.4317573793195,
   "start_xy": [
    607702.1658346119,
    4495103.21482565
   ],
   "end_xy": [
    607703.2088667714,
    4495104.9213085575
   ]
  },
  "max_3m": {
   "gradient_pct": 23.228562806091684,
   "start_distance_m": 350.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 351.5,
   "start_elevation_m": 259.73490049513674,
   "end_elevation_m": 260.4317573793195,
   "start_xy": [
    607701.6443185321,
    4495102.361584196
   ],
   "end_xy": [
    607703.2088667714,
    4495104.9213085575
   ]
  }
 },
 "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": [
   "descends_at_start",
   "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_x60y450_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T12:51:45+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": [
   "x60y450"
  ],
  "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": "Lower Burrell",
  "county": "Pennsylvania"
 }
}