{
 "ocl_version": "0.1.0",
 "name": "Brown Road",
 "slug": "brown-road-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.652230070966198,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1380.0,
   "end_distance_m": 1382.0,
   "start_elevation_m": 553.7585036653396,
   "end_elevation_m": 554.2715482667589,
   "min_gradient_pct": -2.1345147279930643
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.063022012705915,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1379.0,
   "end_distance_m": 1382.0,
   "start_elevation_m": 553.5496576063778,
   "end_elevation_m": 554.2715482667589,
   "min_gradient_pct": -2.0498455511642533
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.041431125626332,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1416.0,
   "end_distance_m": 1421.0,
   "start_elevation_m": 560.4706726509143,
   "end_elevation_m": 561.5727442071956,
   "min_gradient_pct": -1.9770508375813733
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.174732212306253,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1412.0,
   "end_distance_m": 1422.0,
   "start_elevation_m": 559.6531773585914,
   "end_elevation_m": 561.770650579822,
   "min_gradient_pct": -1.4746314271837946
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.246512917242967,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1401.0,
   "end_distance_m": 1421.0,
   "start_elevation_m": 557.523441623747,
   "end_elevation_m": 561.5727442071956,
   "min_gradient_pct": -0.5621226503512844
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.053088947644937,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1400.0,
   "end_distance_m": 1425.0,
   "start_elevation_m": 557.3324363076016,
   "end_elevation_m": 562.3457085445128,
   "min_gradient_pct": 0.0037765315964861657
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.538754919132543,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1415.0,
   "end_distance_m": 1465.0,
   "start_elevation_m": 560.2595784030726,
   "end_elevation_m": 570.0289558626389,
   "min_gradient_pct": 0.940538536623535
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.0701116606524,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1399.0,
   "end_distance_m": 1499.0,
   "start_elevation_m": 557.1593147288784,
   "end_elevation_m": 576.2294263895308,
   "min_gradient_pct": 3.592490345967576
  }
 ],
 "shape": {
  "ascent_concentration": 0.39,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 471.0,
  "shape_class": "sustained"
 },
 "length_m": 1737.931606231818,
 "start_elevation_m": 425.0635679512965,
 "end_elevation_m": 609.4055168917338,
 "endpoint_gain_m": 184.3419489404373,
 "overall_gradient_pct": 10.6069737312694,
 "accumulated_ascent_m": 184.49427394358565,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.041431125626332,
   "start_distance_m": 1416.0,
   "end_distance_m": 1421.0,
   "midpoint_distance_m": 1418.5,
   "start_elevation_m": 560.4706726509143,
   "end_elevation_m": 561.5727442071956,
   "start_xy": [
    636860.5566475821,
    4427218.371350592
   ],
   "end_xy": [
    636865.5523502401,
    4427218.1640948225
   ]
  },
  "max_10m": {
   "gradient_pct": 21.174732212306253,
   "start_distance_m": 1412.0,
   "end_distance_m": 1422.0,
   "midpoint_distance_m": 1417.0,
   "start_elevation_m": 559.6531773585914,
   "end_elevation_m": 561.770650579822,
   "start_xy": [
    636856.5600854559,
    4427218.537155208
   ],
   "end_xy": [
    636866.5514907716,
    4427218.122643668
   ]
  },
  "max_20m": {
   "gradient_pct": 20.246512917242967,
   "start_distance_m": 1401.0,
   "end_distance_m": 1421.0,
   "midpoint_distance_m": 1411.0,
   "start_elevation_m": 557.523441623747,
   "end_elevation_m": 561.5727442071956,
   "start_xy": [
    636845.5642990917,
    4427218.350135927
   ],
   "end_xy": [
    636865.5523502401,
    4427218.1640948225
   ]
  },
  "max_25m": {
   "gradient_pct": 20.053088947644937,
   "start_distance_m": 1400.0,
   "end_distance_m": 1425.0,
   "midpoint_distance_m": 1412.5,
   "start_elevation_m": 557.3324363076016,
   "end_elevation_m": 562.3457085445128,
   "start_xy": [
    636844.5646156565,
    4427218.324975853
   ],
   "end_xy": [
    636869.5489123663,
    4427217.998290206
   ]
  },
  "max_50m": {
   "gradient_pct": 19.538754919132543,
   "start_distance_m": 1415.0,
   "end_distance_m": 1465.0,
   "midpoint_distance_m": 1440.0,
   "start_elevation_m": 560.2595784030726,
   "end_elevation_m": 570.0289558626389,
   "start_xy": [
    636859.5575070506,
    4427218.412801746
   ],
   "end_xy": [
    636909.2669244327,
    4427213.5656917235
   ]
  },
  "max_100m": {
   "gradient_pct": 19.0701116606524,
   "start_distance_m": 1399.0,
   "end_distance_m": 1499.0,
   "midpoint_distance_m": 1449.0,
   "start_elevation_m": 557.1593147288784,
   "end_elevation_m": 576.2294263895308,
   "start_xy": [
    636843.5649322213,
    4427218.299815779
   ],
   "end_xy": [
    636943.2156207523,
    4427212.6512028035
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.9770508375813733,
   "start_distance_m": 76.0,
   "end_distance_m": 81.0,
   "midpoint_distance_m": 78.5,
   "start_elevation_m": 430.68435236788343,
   "end_elevation_m": 430.58549982600437,
   "start_xy": [
    635896.430590642,
    4428077.028034377
   ],
   "end_xy": [
    635899.473600952,
    4428073.06065637
   ]
  },
  "min_10m": {
   "gradient_pct": -1.4746314271837946,
   "start_distance_m": 73.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 78.0,
   "start_elevation_m": 430.71725345349404,
   "end_elevation_m": 430.56979031077566,
   "start_xy": [
    635894.6047844561,
    4428079.408461181
   ],
   "end_xy": [
    635900.6908050759,
    4428071.473705167
   ]
  },
  "min_20m": {
   "gradient_pct": -0.5621226503512844,
   "start_distance_m": 71.0,
   "end_distance_m": 91.0,
   "midpoint_distance_m": 81.0,
   "start_elevation_m": 430.696659328634,
   "end_elevation_m": 430.5842347985637,
   "start_xy": [
    635893.3875803321,
    4428080.995412385
   ],
   "end_xy": [
    635905.5596215719,
    4428065.125900355
   ]
  },
  "min_25m": {
   "gradient_pct": 0.0037765315964861657,
   "start_distance_m": 69.0,
   "end_distance_m": 94.0,
   "midpoint_distance_m": 81.5,
   "start_elevation_m": 430.6506744772727,
   "end_elevation_m": 430.6516186101718,
   "start_xy": [
    635892.1703762081,
    4428082.582363588
   ],
   "end_xy": [
    635907.3854277579,
    4428062.745473551
   ]
  },
  "min_50m": {
   "gradient_pct": 0.940538536623535,
   "start_distance_m": 68.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 93.0,
   "start_elevation_m": 430.624757049119,
   "end_elevation_m": 431.0950263174308,
   "start_xy": [
    635891.5617741462,
    4428083.37583919
   ],
   "end_xy": [
    635921.9918772455,
    4428043.702059115
   ]
  },
  "min_100m": {
   "gradient_pct": 3.592490345967576,
   "start_distance_m": 28.0,
   "end_distance_m": 128.0,
   "midpoint_distance_m": 78.0,
   "start_elevation_m": 428.11521426543425,
   "end_elevation_m": 431.7077046114018,
   "start_xy": [
    635865.2026442756,
    4428113.427476705
   ],
   "end_xy": [
    635928.0778978653,
    4428035.7673031
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.652230070966198,
   "start_distance_m": 1380.0,
   "end_distance_m": 1382.0,
   "midpoint_distance_m": 1381.0,
   "start_elevation_m": 553.7585036653396,
   "end_elevation_m": 554.2715482667589,
   "start_xy": [
    636824.5827943352,
    4427217.590327987
   ],
   "end_xy": [
    636826.5768490316,
    4427217.744424929
   ]
  },
  "max_3m": {
   "gradient_pct": 24.063022012705915,
   "start_distance_m": 1379.0,
   "end_distance_m": 1382.0,
   "midpoint_distance_m": 1380.5,
   "start_elevation_m": 553.5496576063778,
   "end_elevation_m": 554.2715482667589,
   "start_xy": [
    636823.585766987,
    4427217.513279517
   ],
   "end_xy": [
    636826.5768490316,
    4427217.744424929
   ]
  }
 },
 "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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa-west/USGS_1M_17_x63y443_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T15:18:15+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-band2.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": [
   "x63y443"
  ],
  "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": "Springfield",
  "county": "Pennsylvania"
 }
}