{
 "ocl_version": "0.1.0",
 "name": "North Hudson Street",
 "slug": "north-hudson-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.457525817046985,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 832.0,
   "end_distance_m": 834.0,
   "start_elevation_m": 294.46087414851263,
   "end_elevation_m": 294.89002466485357,
   "min_gradient_pct": -1.8080581411993535
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.29093194950542,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 831.0,
   "end_distance_m": 834.0,
   "start_elevation_m": 294.2512967063684,
   "end_elevation_m": 294.89002466485357,
   "min_gradient_pct": -1.766446503828926
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.011483675938507,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 851.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 298.34957654987227,
   "end_elevation_m": 299.4001507336692,
   "min_gradient_pct": -1.3606498795132893
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.828603816090663,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 846.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 297.3172903520601,
   "end_elevation_m": 299.4001507336692,
   "min_gradient_pct": -1.123553848170502
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.584586633762854,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 836.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 295.2832334069166,
   "end_elevation_m": 299.4001507336692,
   "min_gradient_pct": -0.8243029012655256
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.595416109203143,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 831.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 294.2512967063684,
   "end_elevation_m": 299.4001507336692,
   "min_gradient_pct": -0.7261906838097048
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.85543149645639,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 816.0,
   "end_distance_m": 866.0,
   "start_elevation_m": 291.3847880107505,
   "end_elevation_m": 301.3125037589787,
   "min_gradient_pct": -0.5939509998829067
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.97484113605401,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 808.0,
   "end_distance_m": 908.0,
   "start_elevation_m": 290.1513840739333,
   "end_elevation_m": 306.1262252099873,
   "min_gradient_pct": -0.46963201732367565
  }
 ],
 "shape": {
  "ascent_concentration": 0.505,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 91.0,
  "shape_class": "stepped"
 },
 "length_m": 942.9999999999172,
 "start_elevation_m": 254.70019243637813,
 "end_elevation_m": 310.8450140153525,
 "endpoint_gain_m": 56.14482157897436,
 "overall_gradient_pct": 5.953851705087941,
 "accumulated_ascent_m": 56.927908371270576,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.011483675938507,
   "start_distance_m": 851.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 853.5,
   "start_elevation_m": 298.34957654987227,
   "end_elevation_m": 299.4001507336692,
   "start_xy": [
    420550.4436578574,
    4664349.475702683
   ],
   "end_xy": [
    420550.1484477202,
    4664354.466965634
   ]
  },
  "max_10m": {
   "gradient_pct": 20.828603816090663,
   "start_distance_m": 846.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 851.0,
   "start_elevation_m": 297.3172903520601,
   "end_elevation_m": 299.4001507336692,
   "start_xy": [
    420550.73961389624,
    4664344.484469791
   ],
   "end_xy": [
    420550.1484477202,
    4664354.466965634
   ]
  },
  "max_20m": {
   "gradient_pct": 20.584586633762854,
   "start_distance_m": 836.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 846.0,
   "start_elevation_m": 295.2832334069166,
   "end_elevation_m": 299.4001507336692,
   "start_xy": [
    420551.3316396466,
    4664334.502010724
   ],
   "end_xy": [
    420550.1484477202,
    4664354.466965634
   ]
  },
  "max_25m": {
   "gradient_pct": 20.595416109203143,
   "start_distance_m": 831.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 843.5,
   "start_elevation_m": 294.2512967063684,
   "end_elevation_m": 299.4001507336692,
   "start_xy": [
    420551.6276532138,
    4664329.510781231
   ],
   "end_xy": [
    420550.1484477202,
    4664354.466965634
   ]
  },
  "max_50m": {
   "gradient_pct": 19.85543149645639,
   "start_distance_m": 816.0,
   "end_distance_m": 866.0,
   "midpoint_distance_m": 841.0,
   "start_elevation_m": 291.3847880107505,
   "end_elevation_m": 301.3125037589787,
   "start_xy": [
    420552.5146385187,
    4664314.537029803
   ],
   "end_xy": [
    420550.93627211533,
    4664364.430144743
   ]
  },
  "max_100m": {
   "gradient_pct": 15.97484113605401,
   "start_distance_m": 808.0,
   "end_distance_m": 908.0,
   "midpoint_distance_m": 858.0,
   "start_elevation_m": 290.1513840739333,
   "end_elevation_m": 306.1262252099873,
   "start_xy": [
    420552.98863525636,
    4664306.551084986
   ],
   "end_xy": [
    420553.9501362634,
    4664406.230252677
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.3606498795132893,
   "start_distance_m": 121.0,
   "end_distance_m": 126.0,
   "midpoint_distance_m": 123.5,
   "start_elevation_m": 254.34418435268034,
   "end_elevation_m": 254.27615185870468,
   "start_xy": [
    420593.5927183422,
    4663620.753840972
   ],
   "end_xy": [
    420593.3117129036,
    4663625.745937897
   ]
  },
  "min_10m": {
   "gradient_pct": -1.123553848170502,
   "start_distance_m": 120.0,
   "end_distance_m": 130.0,
   "midpoint_distance_m": 125.0,
   "start_elevation_m": 254.35052399039617,
   "end_elevation_m": 254.23816860557912,
   "start_xy": [
    420593.6486878123,
    4663619.755408491
   ],
   "end_xy": [
    420593.0877283938,
    4663629.73966184
   ]
  },
  "min_20m": {
   "gradient_pct": -0.8243029012655256,
   "start_distance_m": 112.0,
   "end_distance_m": 132.0,
   "midpoint_distance_m": 122.0,
   "start_elevation_m": 254.39405002023182,
   "end_elevation_m": 254.2291894399787,
   "start_xy": [
    420594.0977082939,
    4663611.768020048
   ],
   "end_xy": [
    420592.9746846832,
    4663631.736464313
   ]
  },
  "min_25m": {
   "gradient_pct": -0.7261906838097048,
   "start_distance_m": 112.0,
   "end_distance_m": 137.0,
   "midpoint_distance_m": 124.5,
   "start_elevation_m": 254.39405002023182,
   "end_elevation_m": 254.2125023492794,
   "start_xy": [
    420594.0977082939,
    4663611.768020048
   ],
   "end_xy": [
    420592.6946760864,
    4663636.728617673
   ]
  },
  "min_50m": {
   "gradient_pct": -0.5939509998829067,
   "start_distance_m": 41.0,
   "end_distance_m": 91.0,
   "midpoint_distance_m": 66.0,
   "start_elevation_m": 254.66549864415495,
   "end_elevation_m": 254.3685231442135,
   "start_xy": [
    420598.08268958767,
    4663540.87994371
   ],
   "end_xy": [
    420595.27570454445,
    4663590.801086868
   ]
  },
  "min_100m": {
   "gradient_pct": -0.46963201732367565,
   "start_distance_m": 40.0,
   "end_distance_m": 140.0,
   "midpoint_distance_m": 90.0,
   "start_elevation_m": 254.6646092505385,
   "end_elevation_m": 254.19497723321481,
   "start_xy": [
    420598.13868198043,
    4663539.881512527
   ],
   "end_xy": [
    420592.5257175132,
    4663639.723855746
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.457525817046985,
   "start_distance_m": 832.0,
   "end_distance_m": 834.0,
   "midpoint_distance_m": 833.0,
   "start_elevation_m": 294.46087414851263,
   "end_elevation_m": 294.89002466485357,
   "start_xy": [
    420551.5686150134,
    4664330.509036944
   ],
   "end_xy": [
    420551.4496125163,
    4664332.505493156
   ]
  },
  "max_3m": {
   "gradient_pct": 21.29093194950542,
   "start_distance_m": 831.0,
   "end_distance_m": 834.0,
   "midpoint_distance_m": 832.5,
   "start_elevation_m": 294.2512967063684,
   "end_elevation_m": 294.89002466485357,
   "start_xy": [
    420551.6276532138,
    4664329.510781231
   ],
   "end_xy": [
    420551.4496125163,
    4664332.505493156
   ]
  }
 },
 "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": 0.001,
   "obstruction_max_height_m": 6.05,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ny/USGS_1M_18_x42y467_NY_FEMAR2_Central_2018_D19.tif"
  ],
  "calculated_at": "2026-09-08T17:58:22+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": "retro-box-260908",
  "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": [
   "x42y467"
  ],
  "route_cut_m": 943.0,
  "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": "Union",
  "county": "New York"
 }
}