{
 "ocl_version": "0.1.0",
 "name": "Hunter Road",
 "slug": "hunter-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.389178917496565,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1153.0,
   "end_distance_m": 1155.0,
   "start_elevation_m": 553.42127664511,
   "end_elevation_m": 553.8490602234599,
   "min_gradient_pct": -10.292800404278069
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.36236199284743,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1147.0,
   "end_distance_m": 1150.0,
   "start_elevation_m": 552.1527602648744,
   "end_elevation_m": 552.7936311246598,
   "min_gradient_pct": -10.222464192137673
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.19719119564934,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1146.0,
   "end_distance_m": 1151.0,
   "start_elevation_m": 551.9435275769572,
   "end_elevation_m": 553.0033871367397,
   "min_gradient_pct": -10.201823772069929
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.135824819670006,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1147.0,
   "end_distance_m": 1157.0,
   "start_elevation_m": 552.1527602648744,
   "end_elevation_m": 554.2663427468414,
   "min_gradient_pct": -9.959342597040859
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.49457322473984,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1142.0,
   "end_distance_m": 1162.0,
   "start_elevation_m": 551.1622053598848,
   "end_elevation_m": 555.2611200048327,
   "min_gradient_pct": -9.71088582808818
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.244842586386767,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1105.0,
   "end_distance_m": 1130.0,
   "start_elevation_m": 543.779052931683,
   "end_elevation_m": 548.8402635782797,
   "min_gradient_pct": -9.638902849944316
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.158912806316494,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1109.0,
   "end_distance_m": 1159.0,
   "start_elevation_m": 544.6000484911763,
   "end_elevation_m": 554.6795048943345,
   "min_gradient_pct": -8.879406379093325
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.577345345034246,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1068.0,
   "end_distance_m": 1168.0,
   "start_elevation_m": 536.7747295433385,
   "end_elevation_m": 556.3520748883727,
   "min_gradient_pct": -8.110420066740971
  }
 ],
 "shape": {
  "ascent_concentration": 0.493,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 568.0,
  "shape_class": "stepped"
 },
 "length_m": 4808.000000000205,
 "start_elevation_m": 468.03703838684567,
 "end_elevation_m": 697.1862357150211,
 "endpoint_gain_m": 229.14919732817543,
 "overall_gradient_pct": 4.765998280535892,
 "accumulated_ascent_m": 291.71505859894813,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.19719119564934,
   "start_distance_m": 1146.0,
   "end_distance_m": 1151.0,
   "midpoint_distance_m": 1148.5,
   "start_elevation_m": 551.9435275769572,
   "end_elevation_m": 553.0033871367397,
   "start_xy": [
    533027.2055359954,
    4637939.920622517
   ],
   "end_xy": [
    533022.2268661385,
    4637939.459269663
   ]
  },
  "max_10m": {
   "gradient_pct": 21.135824819670006,
   "start_distance_m": 1147.0,
   "end_distance_m": 1157.0,
   "midpoint_distance_m": 1152.0,
   "start_elevation_m": 552.1527602648744,
   "end_elevation_m": 554.2663427468414,
   "start_xy": [
    533026.2098020241,
    4637939.828351947
   ],
   "end_xy": [
    533016.2524623104,
    4637938.905646238
   ]
  },
  "max_20m": {
   "gradient_pct": 20.49457322473984,
   "start_distance_m": 1142.0,
   "end_distance_m": 1162.0,
   "midpoint_distance_m": 1152.0,
   "start_elevation_m": 551.1622053598848,
   "end_elevation_m": 555.2611200048327,
   "start_xy": [
    533031.1884718809,
    4637940.2897048015
   ],
   "end_xy": [
    533011.2737924535,
    4637938.444293383
   ]
  },
  "max_25m": {
   "gradient_pct": 20.244842586386767,
   "start_distance_m": 1105.0,
   "end_distance_m": 1130.0,
   "midpoint_distance_m": 1117.5,
   "start_elevation_m": 543.779052931683,
   "end_elevation_m": 548.8402635782797,
   "start_xy": [
    533068.0306288217,
    4637943.703715925
   ],
   "end_xy": [
    533043.1372795374,
    4637941.396951652
   ]
  },
  "max_50m": {
   "gradient_pct": 20.158912806316494,
   "start_distance_m": 1109.0,
   "end_distance_m": 1159.0,
   "midpoint_distance_m": 1134.0,
   "start_elevation_m": 544.6000484911763,
   "end_elevation_m": 554.6795048943345,
   "start_xy": [
    533064.0476929361,
    4637943.334633641
   ],
   "end_xy": [
    533014.2609943677,
    4637938.721105096
   ]
  },
  "max_100m": {
   "gradient_pct": 19.577345345034246,
   "start_distance_m": 1068.0,
   "end_distance_m": 1168.0,
   "midpoint_distance_m": 1118.0,
   "start_elevation_m": 536.7747295433385,
   "end_elevation_m": 556.3520748883727,
   "start_xy": [
    533104.8727857624,
    4637947.117727049
   ],
   "end_xy": [
    533005.2993886253,
    4637937.890669958
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.201823772069929,
   "start_distance_m": 3990.0,
   "end_distance_m": 3995.0,
   "midpoint_distance_m": 3992.5,
   "start_elevation_m": 638.9603204281287,
   "end_elevation_m": 638.4502292395252,
   "start_xy": [
    530631.3294133318,
    4639111.477325108
   ],
   "end_xy": [
    530626.4892024412,
    4639112.731262321
   ]
  },
  "min_10m": {
   "gradient_pct": -9.959342597040859,
   "start_distance_m": 3990.0,
   "end_distance_m": 4000.0,
   "midpoint_distance_m": 3995.0,
   "start_elevation_m": 638.9603204281287,
   "end_elevation_m": 637.9643861684247,
   "start_xy": [
    530631.3294133318,
    4639111.477325108
   ],
   "end_xy": [
    530621.6489915506,
    4639113.985199533
   ]
  },
  "min_20m": {
   "gradient_pct": -9.71088582808818,
   "start_distance_m": 3987.0,
   "end_distance_m": 4007.0,
   "midpoint_distance_m": 3997.0,
   "start_elevation_m": 639.2493806698507,
   "end_elevation_m": 637.307203504233,
   "start_xy": [
    530634.2335398663,
    4639110.72496278
   ],
   "end_xy": [
    530614.7974135702,
    4639115.414962085
   ]
  },
  "min_25m": {
   "gradient_pct": -9.638902849944316,
   "start_distance_m": 3985.0,
   "end_distance_m": 4010.0,
   "midpoint_distance_m": 3997.5,
   "start_elevation_m": 639.4359993822537,
   "end_elevation_m": 637.0262736697676,
   "start_xy": [
    530636.1696242224,
    4639110.223387894
   ],
   "end_xy": [
    530611.8576580001,
    4639116.013157026
   ]
  },
  "min_50m": {
   "gradient_pct": -8.879406379093325,
   "start_distance_m": 3529.0,
   "end_distance_m": 3579.0,
   "midpoint_distance_m": 3554.0,
   "start_elevation_m": 653.9670506849294,
   "end_elevation_m": 649.5273474953827,
   "start_xy": [
    531040.5735936993,
    4638916.912052427
   ],
   "end_xy": [
    531004.5563285408,
    4638951.585912079
   ]
  },
  "min_100m": {
   "gradient_pct": -8.110420066740971,
   "start_distance_m": 3505.0,
   "end_distance_m": 3605.0,
   "midpoint_distance_m": 3555.0,
   "start_elevation_m": 655.6516963286495,
   "end_elevation_m": 647.5412762619085,
   "start_xy": [
    531058.3375630981,
    4638900.773855775
   ],
   "end_xy": [
    530985.9457136317,
    4638969.742040871
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.389178917496565,
   "start_distance_m": 1153.0,
   "end_distance_m": 1155.0,
   "midpoint_distance_m": 1154.0,
   "start_elevation_m": 553.42127664511,
   "end_elevation_m": 553.8490602234599,
   "start_xy": [
    533020.2353981958,
    4637939.274728521
   ],
   "end_xy": [
    533018.2439302531,
    4637939.090187379
   ]
  },
  "max_3m": {
   "gradient_pct": 21.36236199284743,
   "start_distance_m": 1147.0,
   "end_distance_m": 1150.0,
   "midpoint_distance_m": 1148.5,
   "start_elevation_m": 552.1527602648744,
   "end_elevation_m": 552.7936311246598,
   "start_xy": [
    533026.2098020241,
    4637939.828351947
   ],
   "end_xy": [
    533023.22260011,
    4637939.551540234
   ]
  }
 },
 "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": 0.119,
   "obstruction_max_height_m": 26.33,
   "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_1M_18_x52y464_NY_FEMAR2_Central_2018_D19.tif",
   "data/cache/usa/ny/USGS_1M_18_x52y465_NY_FEMAR2_Central_2018_D19.tif",
   "data/cache/usa/ny/USGS_1M_18_x53y464_NY_FEMAR2_Central_2018_D19.tif"
  ],
  "calculated_at": "2026-09-06T17:22:33+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": [
   "x52y464",
   "x52y465",
   "x53y464"
  ],
  "route_summit_trim_m": 3437.9,
  "route_summit_trim_loss_m": 143.5,
  "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": "Neversink",
  "county": "New York"
 }
}