{
 "ocl_version": "0.1.0",
 "name": "Howard Beech Road",
 "slug": "howard-beech-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.634010882105372,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 826.0,
   "end_distance_m": 828.0,
   "start_elevation_m": 492.9153625966071,
   "end_elevation_m": 493.3880428142492,
   "min_gradient_pct": -7.123041457273871
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.29245128991791,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 825.0,
   "end_distance_m": 828.0,
   "start_elevation_m": 492.6892692755517,
   "end_elevation_m": 493.3880428142492,
   "min_gradient_pct": -7.035858952984124
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.78005097864252,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 822.0,
   "end_distance_m": 827.0,
   "start_elevation_m": 492.0160909907481,
   "end_elevation_m": 493.15509353968025,
   "min_gradient_pct": -6.940500517667942
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.658191155971394,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 819.0,
   "end_distance_m": 829.0,
   "start_elevation_m": 491.3405766444994,
   "end_elevation_m": 493.6063957600965,
   "min_gradient_pct": -6.332932472410562
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.43304309966993,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 813.0,
   "end_distance_m": 833.0,
   "start_elevation_m": 490.1409299455287,
   "end_elevation_m": 494.42753856546267,
   "min_gradient_pct": -4.787754120377485
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.87322073887958,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 808.0,
   "end_distance_m": 833.0,
   "start_elevation_m": 489.2092333807428,
   "end_elevation_m": 494.42753856546267,
   "min_gradient_pct": -4.292091770334764
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.268819358633436,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1222.0,
   "end_distance_m": 1272.0,
   "start_elevation_m": 549.7135428352348,
   "end_elevation_m": 559.3479525145515,
   "min_gradient_pct": -2.636855471398235
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.615480082843533,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1171.0,
   "end_distance_m": 1271.0,
   "start_elevation_m": 540.550863008325,
   "end_elevation_m": 559.1663430911685,
   "min_gradient_pct": -0.487502317899839
  }
 ],
 "shape": {
  "ascent_concentration": 0.379,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 304.0,
  "shape_class": "sustained"
 },
 "length_m": 1461.9999999998813,
 "start_elevation_m": 435.87540514527694,
 "end_elevation_m": 575.3189683706978,
 "endpoint_gain_m": 139.44356322542086,
 "overall_gradient_pct": 9.537863421712187,
 "accumulated_ascent_m": 141.1406878193714,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.78005097864252,
   "start_distance_m": 822.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 824.5,
   "start_elevation_m": 492.0160909907481,
   "end_elevation_m": 493.15509353968025,
   "start_xy": [
    512922.7614336697,
    4640206.007322708
   ],
   "end_xy": [
    512918.42370377964,
    4640203.592997147
   ]
  },
  "max_10m": {
   "gradient_pct": 22.658191155971394,
   "start_distance_m": 819.0,
   "end_distance_m": 829.0,
   "midpoint_distance_m": 824.0,
   "start_elevation_m": 491.3405766444994,
   "end_elevation_m": 493.6063957600965,
   "start_xy": [
    512925.284249898,
    4640207.630713689
   ],
   "end_xy": [
    512916.50436472386,
    4640203.030736008
   ]
  },
  "max_20m": {
   "gradient_pct": 21.43304309966993,
   "start_distance_m": 813.0,
   "end_distance_m": 833.0,
   "midpoint_distance_m": 823.0,
   "start_elevation_m": 490.1409299455287,
   "end_elevation_m": 494.42753856546267,
   "start_xy": [
    512930.22291271435,
    4640211.021746534
   ],
   "end_xy": [
    512912.54354664136,
    4640202.617429855
   ]
  },
  "max_25m": {
   "gradient_pct": 20.87322073887958,
   "start_distance_m": 808.0,
   "end_distance_m": 833.0,
   "midpoint_distance_m": 820.5,
   "start_elevation_m": 489.2092333807428,
   "end_elevation_m": 494.42753856546267,
   "start_xy": [
    512934.03302660893,
    4640214.259497623
   ],
   "end_xy": [
    512912.54354664136,
    4640202.617429855
   ]
  },
  "max_50m": {
   "gradient_pct": 19.268819358633436,
   "start_distance_m": 1222.0,
   "end_distance_m": 1272.0,
   "midpoint_distance_m": 1247.0,
   "start_elevation_m": 549.7135428352348,
   "end_elevation_m": 559.3479525145515,
   "start_xy": [
    512666.58575815154,
    4640467.863509242
   ],
   "end_xy": [
    512638.9498529933,
    4640507.41851333
   ]
  },
  "max_100m": {
   "gradient_pct": 18.615480082843533,
   "start_distance_m": 1171.0,
   "end_distance_m": 1271.0,
   "midpoint_distance_m": 1221.0,
   "start_elevation_m": 540.550863008325,
   "end_elevation_m": 559.1663430911685,
   "start_xy": [
    512684.5570819408,
    4640420.2025745185
   ],
   "end_xy": [
    512639.78815357876,
    4640506.873304995
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.940500517667942,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 435.87540514527694,
   "end_elevation_m": 435.52838011939355,
   "start_xy": [
    513436.728,
    4639723.118
   ],
   "end_xy": [
    513433.47228636494,
    4639726.912776506
   ]
  },
  "min_10m": {
   "gradient_pct": -6.332932472410562,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 435.87540514527694,
   "end_elevation_m": 435.2421118980359,
   "start_xy": [
    513436.728,
    4639723.118
   ],
   "end_xy": [
    513430.21657272987,
    4639730.70755301
   ]
  },
  "min_20m": {
   "gradient_pct": -4.787754120377485,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 435.87540514527694,
   "end_elevation_m": 434.91785432120145,
   "start_xy": [
    513436.728,
    4639723.118
   ],
   "end_xy": [
    513423.7051454598,
    4639738.297106022
   ]
  },
  "min_25m": {
   "gradient_pct": -4.292091770334764,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 435.87540514527694,
   "end_elevation_m": 434.80238220269325,
   "start_xy": [
    513436.728,
    4639723.118
   ],
   "end_xy": [
    513420.44943182473,
    4639742.091882527
   ]
  },
  "min_50m": {
   "gradient_pct": -2.636855471398235,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 435.87540514527694,
   "end_elevation_m": 434.5569774095778,
   "start_xy": [
    513436.728,
    4639723.118
   ],
   "end_xy": [
    513404.17086364946,
    4639761.065765055
   ]
  },
  "min_100m": {
   "gradient_pct": -0.487502317899839,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 435.87540514527694,
   "end_elevation_m": 435.3879028273771,
   "start_xy": [
    513436.728,
    4639723.118
   ],
   "end_xy": [
    513373.8506834405,
    4639800.770333843
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.634010882105372,
   "start_distance_m": 826.0,
   "end_distance_m": 828.0,
   "midpoint_distance_m": 827.0,
   "start_elevation_m": 492.9153625966071,
   "end_elevation_m": 493.3880428142492,
   "start_xy": [
    512919.38337330753,
    4640203.874127717
   ],
   "end_xy": [
    512917.46403425175,
    4640203.311866578
   ]
  },
  "max_3m": {
   "gradient_pct": 23.29245128991791,
   "start_distance_m": 825.0,
   "end_distance_m": 828.0,
   "midpoint_distance_m": 826.5,
   "start_elevation_m": 492.6892692755517,
   "end_elevation_m": 493.3880428142492,
   "start_xy": [
    512920.23861744144,
    4640204.383931727
   ],
   "end_xy": [
    512917.46403425175,
    4640203.311866578
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.414,
   "obstruction_max_height_m": 25.18,
   "flagged_windows_m": [
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "descends_at_start"
  ]
 },
 "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/ny/USGS_1M_18_x51y464_NY_FEMAR2_Central_2018_D19.tif",
   "data/cache/usa/ny/USGS_1M_18_x51y465_NY_FEMAR2_Central_2018_D19.tif"
  ],
  "calculated_at": "2026-09-06T17:28:37+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-york-2026-09-06-batch.osm.pbf",
  "osm_snapshot": "2026-09-04T20:21:21Z",
  "run_id": "ny-run3-260906",
  "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, NY_FEMAR2_Central_2018_D19 (collected 2018)",
  "elevation_tile_ids": [
   "x51y464",
   "x51y465"
  ],
  "route_summit_trim_m": 266.4,
  "route_summit_trim_loss_m": 10.3,
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/NY_FEMAR2_Central_5_2018",
   "ept_crs": "EPSG:3857",
   "station_coverage": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Rockland",
  "county": "New York"
 }
}