{
 "ocl_version": "0.1.0",
 "name": "Nelson Road",
 "slug": "nelson-road-5",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 15.05245577881169,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 6504.0,
   "end_distance_m": 6506.0,
   "start_elevation_m": 390.5241007063522,
   "end_elevation_m": 390.82514982192845,
   "min_gradient_pct": -9.660775678528921
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 14.8334571959064,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 6509.0,
   "end_distance_m": 6512.0,
   "start_elevation_m": 391.2427671353526,
   "end_elevation_m": 391.6877708512298,
   "min_gradient_pct": -9.404841377456327
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 14.57709775731928,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6507.0,
   "end_distance_m": 6512.0,
   "start_elevation_m": 390.95891596336384,
   "end_elevation_m": 391.6877708512298,
   "min_gradient_pct": -9.371147915297797
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 14.415690136289072,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6504.0,
   "end_distance_m": 6514.0,
   "start_elevation_m": 390.5241007063522,
   "end_elevation_m": 391.9656697199811,
   "min_gradient_pct": -9.110437649965775
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 14.225947810309947,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6499.0,
   "end_distance_m": 6519.0,
   "start_elevation_m": 389.8281228708702,
   "end_elevation_m": 392.67331243293216,
   "min_gradient_pct": -8.98562464716889
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 14.171580215474933,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6493.0,
   "end_distance_m": 6518.0,
   "start_elevation_m": 388.9920446194863,
   "end_elevation_m": 392.53493967335504,
   "min_gradient_pct": -8.862144440898646
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 13.692124308905022,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6475.0,
   "end_distance_m": 6525.0,
   "start_elevation_m": 386.59649364100005,
   "end_elevation_m": 393.44255579545256,
   "min_gradient_pct": -8.057936546975611
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.201004768246662,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6420.0,
   "end_distance_m": 6520.0,
   "start_elevation_m": 379.59747078524117,
   "end_elevation_m": 392.79847555348783,
   "min_gradient_pct": -6.242939140429371
  }
 ],
 "shape": {
  "ascent_concentration": 0.378,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 187.0,
  "shape_class": "sustained"
 },
 "length_m": 11263.717530871787,
 "start_elevation_m": 155.29131156005928,
 "end_elevation_m": 505.932948937507,
 "endpoint_gain_m": 350.6416373774477,
 "overall_gradient_pct": 3.113018738408551,
 "accumulated_ascent_m": 400.8411369561228,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 14.57709775731928,
   "start_distance_m": 6507.0,
   "end_distance_m": 6512.0,
   "midpoint_distance_m": 6509.5,
   "start_elevation_m": 390.95891596336384,
   "end_elevation_m": 391.6877708512298,
   "start_xy": [
    436442.0820093201,
    4762857.978669192
   ],
   "end_xy": [
    436438.88096341287,
    4762854.137666055
   ]
  },
  "max_10m": {
   "gradient_pct": 14.415690136289072,
   "start_distance_m": 6504.0,
   "end_distance_m": 6514.0,
   "midpoint_distance_m": 6509.0,
   "start_elevation_m": 390.5241007063522,
   "end_elevation_m": 391.9656697199811,
   "start_xy": [
    436444.00263686443,
    4762860.283271074
   ],
   "end_xy": [
    436437.61482084816,
    4762852.590353431
   ]
  },
  "max_20m": {
   "gradient_pct": 14.225947810309947,
   "start_distance_m": 6499.0,
   "end_distance_m": 6519.0,
   "midpoint_distance_m": 6509.0,
   "start_elevation_m": 389.8281228708702,
   "end_elevation_m": 392.67331243293216,
   "start_xy": [
    436447.20368277165,
    4762864.124274211
   ],
   "end_xy": [
    436434.74866557936,
    4762848.493384555
   ]
  },
  "max_25m": {
   "gradient_pct": 14.171580215474933,
   "start_distance_m": 6493.0,
   "end_distance_m": 6518.0,
   "midpoint_distance_m": 6505.5,
   "start_elevation_m": 388.9920446194863,
   "end_elevation_m": 392.53493967335504,
   "start_xy": [
    436451.04493786034,
    4762868.733477976
   ],
   "end_xy": [
    436435.32189663313,
    4762849.3127783295
   ]
  },
  "max_50m": {
   "gradient_pct": 13.692124308905022,
   "start_distance_m": 6475.0,
   "end_distance_m": 6525.0,
   "midpoint_distance_m": 6500.0,
   "start_elevation_m": 386.59649364100005,
   "end_elevation_m": 393.44255579545256,
   "start_xy": [
    436464.3102660413,
    4762880.850670237
   ],
   "end_xy": [
    436431.30927925685,
    4762843.577021902
   ]
  },
  "max_100m": {
   "gradient_pct": 13.201004768246662,
   "start_distance_m": 6420.0,
   "end_distance_m": 6520.0,
   "midpoint_distance_m": 6470.0,
   "start_elevation_m": 379.59747078524117,
   "end_elevation_m": 392.79847555348783,
   "start_xy": [
    436505.9191161549,
    4762916.818761543
   ],
   "end_xy": [
    436434.1754345256,
    4762847.67399078
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.371147915297797,
   "start_distance_m": 3767.0,
   "end_distance_m": 3772.0,
   "midpoint_distance_m": 3769.5,
   "start_elevation_m": 261.2705415612799,
   "end_elevation_m": 260.801984165515,
   "start_xy": [
    437970.2670579012,
    4764900.081927018
   ],
   "end_xy": [
    437968.732446582,
    4764895.323254083
   ]
  },
  "min_10m": {
   "gradient_pct": -9.110437649965775,
   "start_distance_m": 10991.0,
   "end_distance_m": 11001.0,
   "midpoint_distance_m": 10996.0,
   "start_elevation_m": 504.6550877452561,
   "end_elevation_m": 503.7440439802595,
   "start_xy": [
    437530.21309913095,
    4759653.783000671
   ],
   "end_xy": [
    437540.1842460848,
    4759653.02390356
   ]
  },
  "min_20m": {
   "gradient_pct": -8.98562464716889,
   "start_distance_m": 10988.0,
   "end_distance_m": 11008.0,
   "midpoint_distance_m": 10998.0,
   "start_elevation_m": 504.92581716259326,
   "end_elevation_m": 503.1286922331595,
   "start_xy": [
    437527.22175504477,
    4759654.010729805
   ],
   "end_xy": [
    437547.1640489526,
    4759652.492535583
   ]
  },
  "min_25m": {
   "gradient_pct": -8.862144440898646,
   "start_distance_m": 10984.0,
   "end_distance_m": 11009.0,
   "midpoint_distance_m": 10996.5,
   "start_elevation_m": 505.2515131171927,
   "end_elevation_m": 503.03597700696804,
   "start_xy": [
    437523.2332962632,
    4759654.314368648
   ],
   "end_xy": [
    437548.16116364795,
    4759652.416625871
   ]
  },
  "min_50m": {
   "gradient_pct": -8.057936546975611,
   "start_distance_m": 10974.0,
   "end_distance_m": 11024.0,
   "midpoint_distance_m": 10999.0,
   "start_elevation_m": 505.959974106157,
   "end_elevation_m": 501.9310058326692,
   "start_xy": [
    437513.26214930933,
    4759655.07346576
   ],
   "end_xy": [
    437563.11788407876,
    4759651.277980205
   ]
  },
  "min_100m": {
   "gradient_pct": -6.242939140429371,
   "start_distance_m": 10955.0,
   "end_distance_m": 11055.0,
   "midpoint_distance_m": 11005.0,
   "start_elevation_m": 506.79629156864576,
   "end_elevation_m": 500.5533524282164,
   "start_xy": [
    437494.31697009696,
    4759656.51575027
   ],
   "end_xy": [
    437594.0576027037,
    4759649.461111711
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 15.05245577881169,
   "start_distance_m": 6504.0,
   "end_distance_m": 6506.0,
   "midpoint_distance_m": 6505.0,
   "start_elevation_m": 390.5241007063522,
   "end_elevation_m": 390.82514982192845,
   "start_xy": [
    436444.00263686443,
    4762860.283271074
   ],
   "end_xy": [
    436442.72221850156,
    4762858.746869819
   ]
  },
  "max_3m": {
   "gradient_pct": 14.8334571959064,
   "start_distance_m": 6509.0,
   "end_distance_m": 6512.0,
   "midpoint_distance_m": 6510.5,
   "start_elevation_m": 391.2427671353526,
   "end_elevation_m": 391.6877708512298,
   "start_xy": [
    436440.8015909572,
    4762856.442267937
   ],
   "end_xy": [
    436438.88096341287,
    4762854.137666055
   ]
  }
 },
 "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": 0.033,
   "obstruction_max_height_m": 20.93,
   "flagged_windows_m": []
  },
  "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_one_meter_x43y476_NY_MadisonOtsegoCo_2015.tif",
   "data/cache/usa/ny/USGS_one_meter_x43y477_NY_MadisonOtsegoCo_2015.tif"
  ],
  "calculated_at": "2026-09-06T10:30:49+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_MadisonOtsegoCo_2015 (collected 2015)",
  "elevation_tile_ids": [
   "x43y476",
   "x43y477"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_NY_MadisonOtsegoCo_2015_LAS_2017",
   "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": "Lenox",
  "county": "New York"
 }
}