{
 "ocl_version": "0.1.0",
 "name": "Bly Hollow Road",
 "slug": "bly-hollow-road-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.37446429287604,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 976.0,
   "end_distance_m": 978.0,
   "start_elevation_m": 444.2823282506067,
   "end_elevation_m": 444.76981753646425,
   "min_gradient_pct": -0.4262982135372795
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.47077024606013,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 975.0,
   "end_distance_m": 978.0,
   "start_elevation_m": 444.06569442908244,
   "end_elevation_m": 444.76981753646425,
   "min_gradient_pct": 0.6776561537947146
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.84410567006148,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 974.0,
   "end_distance_m": 979.0,
   "start_elevation_m": 443.8425438560102,
   "end_elevation_m": 444.98474913951327,
   "min_gradient_pct": 1.0413437238719325
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.354564274602126,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 975.0,
   "end_distance_m": 985.0,
   "start_elevation_m": 444.06569442908244,
   "end_elevation_m": 446.20115085654265,
   "min_gradient_pct": 1.5479525232007063
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.74384229748432,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 948.0,
   "end_distance_m": 968.0,
   "start_elevation_m": 438.5712561924155,
   "end_elevation_m": 442.72002465191235,
   "min_gradient_pct": 1.8720709596149732
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.699939523080957,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 947.0,
   "end_distance_m": 972.0,
   "start_elevation_m": 438.3628644830871,
   "end_elevation_m": 443.53784936385733,
   "min_gradient_pct": 2.015220136164089
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.341429865661667,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 939.0,
   "end_distance_m": 989.0,
   "start_elevation_m": 436.7572701841571,
   "end_elevation_m": 446.92798511698794,
   "min_gradient_pct": 2.95217798092051
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.92562211770837,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 891.0,
   "end_distance_m": 991.0,
   "start_elevation_m": 427.44632444934507,
   "end_elevation_m": 447.37194656705344,
   "min_gradient_pct": 3.9318784842182026
  }
 ],
 "shape": {
  "ascent_concentration": 0.351,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 457.0,
  "shape_class": "sustained"
 },
 "length_m": 2452.542200892343,
 "start_elevation_m": 363.4526404645483,
 "end_elevation_m": 600.2794288574246,
 "endpoint_gain_m": 236.82678839287627,
 "overall_gradient_pct": 9.656379747786124,
 "accumulated_ascent_m": 236.89782101745067,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.84410567006148,
   "start_distance_m": 974.0,
   "end_distance_m": 979.0,
   "midpoint_distance_m": 976.5,
   "start_elevation_m": 443.8425438560102,
   "end_elevation_m": 444.98474913951327,
   "start_xy": [
    632478.3803252988,
    4721711.390965726
   ],
   "end_xy": [
    632476.1088552463,
    4721715.839861789
   ]
  },
  "max_10m": {
   "gradient_pct": 21.354564274602126,
   "start_distance_m": 975.0,
   "end_distance_m": 985.0,
   "midpoint_distance_m": 980.0,
   "start_elevation_m": 444.06569442908244,
   "end_elevation_m": 446.20115085654265,
   "start_xy": [
    632477.873423081,
    4721712.250112444
   ],
   "end_xy": [
    632473.4620034943,
    4721721.224485805
   ]
  },
  "max_20m": {
   "gradient_pct": 20.74384229748432,
   "start_distance_m": 948.0,
   "end_distance_m": 968.0,
   "midpoint_distance_m": 958.0,
   "start_elevation_m": 438.5712561924155,
   "end_elevation_m": 442.72002465191235,
   "start_xy": [
    632493.0116271931,
    4721689.898525082
   ],
   "end_xy": [
    632481.756779582,
    4721706.431171731
   ]
  },
  "max_25m": {
   "gradient_pct": 20.699939523080957,
   "start_distance_m": 947.0,
   "end_distance_m": 972.0,
   "midpoint_distance_m": 959.5,
   "start_elevation_m": 438.3628644830871,
   "end_elevation_m": 443.53784936385733,
   "start_xy": [
    632493.5743695736,
    4721689.071892749
   ],
   "end_xy": [
    632479.5058100598,
    4721709.737701061
   ]
  },
  "max_50m": {
   "gradient_pct": 20.341429865661667,
   "start_distance_m": 939.0,
   "end_distance_m": 989.0,
   "midpoint_distance_m": 964.0,
   "start_elevation_m": 436.7572701841571,
   "end_elevation_m": 446.92798511698794,
   "start_xy": [
    632498.0763086181,
    4721682.458834089
   ],
   "end_xy": [
    632471.6974356595,
    4721724.81423515
   ]
  },
  "max_100m": {
   "gradient_pct": 19.92562211770837,
   "start_distance_m": 891.0,
   "end_distance_m": 991.0,
   "midpoint_distance_m": 941.0,
   "start_elevation_m": 427.44632444934507,
   "end_elevation_m": 447.37194656705344,
   "start_xy": [
    632527.7123140843,
    4721644.866642126
   ],
   "end_xy": [
    632470.8151517421,
    4721726.609109822
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.0413437238719325,
   "start_distance_m": 20.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 22.5,
   "start_elevation_m": 363.9130317371316,
   "end_elevation_m": 363.9650989233252,
   "start_xy": [
    632876.2977621291,
    4720895.597768522
   ],
   "end_xy": [
    632875.2627026615,
    4720900.489460653
   ]
  },
  "min_10m": {
   "gradient_pct": 1.5479525232007063,
   "start_distance_m": 15.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 20.0,
   "start_elevation_m": 363.8103036710051,
   "end_elevation_m": 363.9650989233252,
   "start_xy": [
    632877.3328215969,
    4720890.706076392
   ],
   "end_xy": [
    632875.2627026615,
    4720900.489460653
   ]
  },
  "min_20m": {
   "gradient_pct": 1.8720709596149732,
   "start_distance_m": 5.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 15.0,
   "start_elevation_m": 363.5906847314022,
   "end_elevation_m": 363.9650989233252,
   "start_xy": [
    632879.4029405323,
    4720880.922692131
   ],
   "end_xy": [
    632875.2627026615,
    4720900.489460653
   ]
  },
  "min_25m": {
   "gradient_pct": 2.015220136164089,
   "start_distance_m": 7.0,
   "end_distance_m": 32.0,
   "midpoint_distance_m": 19.5,
   "start_elevation_m": 363.64124641685515,
   "end_elevation_m": 364.1450514508962,
   "start_xy": [
    632878.9889167452,
    4720882.879368983
   ],
   "end_xy": [
    632874.1937125715,
    4720907.4009085875
   ]
  },
  "min_50m": {
   "gradient_pct": 2.95217798092051,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 363.4526404645483,
   "end_elevation_m": 364.9287294550086,
   "start_xy": [
    632880.438,
    4720876.031
   ],
   "end_xy": [
    632872.0318223914,
    4720925.270610063
   ]
  },
  "min_100m": {
   "gradient_pct": 3.9318784842182026,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 363.4526404645483,
   "end_elevation_m": 367.3845189487665,
   "start_xy": [
    632880.438,
    4720876.031
   ],
   "end_xy": [
    632866.0265718913,
    4720974.9086697195
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.37446429287604,
   "start_distance_m": 976.0,
   "end_distance_m": 978.0,
   "midpoint_distance_m": 977.0,
   "start_elevation_m": 444.2823282506067,
   "end_elevation_m": 444.76981753646425,
   "start_xy": [
    632477.4322811223,
    4721713.14754978
   ],
   "end_xy": [
    632476.549997205,
    4721714.942424452
   ]
  },
  "max_3m": {
   "gradient_pct": 23.47077024606013,
   "start_distance_m": 975.0,
   "end_distance_m": 978.0,
   "midpoint_distance_m": 976.5,
   "start_elevation_m": 444.06569442908244,
   "end_elevation_m": 444.76981753646425,
   "start_xy": [
    632477.873423081,
    4721712.250112444
   ],
   "end_xy": [
    632476.549997205,
    4721714.942424452
   ]
  }
 },
 "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": 0.111,
   "obstruction_max_height_m": 25.13,
   "flagged_windows_m": [
    50,
    100
   ]
  },
  "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/ny/USGS_1M_18_x63y473_NY_Hudson_D22.tif"
  ],
  "calculated_at": "2026-09-06T11:32:50+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-band3.osm.pbf",
  "osm_snapshot": "",
  "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_Hudson_D22 (collected 2022)",
  "elevation_tile_ids": [
   "x63y473"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/NY_Hudson_1_D22",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.986,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Berlin",
  "county": "New York"
 }
}