{
 "ocl_version": "0.1.0",
 "name": "Cider Hill Road",
 "slug": "cider-hill-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.66351401603822,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 173.0,
   "end_distance_m": 175.0,
   "start_elevation_m": 450.0365865715214,
   "end_elevation_m": 450.7098568518422,
   "min_gradient_pct": -8.994584819848228
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.75013542488144,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 172.0,
   "end_distance_m": 175.0,
   "start_elevation_m": 449.72735278909573,
   "end_elevation_m": 450.7098568518422,
   "min_gradient_pct": -8.919388560887379
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.148414695055635,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 172.0,
   "end_distance_m": 177.0,
   "start_elevation_m": 449.72735278909573,
   "end_elevation_m": 451.2847735238485,
   "min_gradient_pct": -8.687605092297872
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.871402216533625,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 172.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 449.72735278909573,
   "end_elevation_m": 452.7144930107491,
   "min_gradient_pct": -4.453721005061766
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.021325658585965,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 246.0,
   "end_distance_m": 266.0,
   "start_elevation_m": 464.7389170216611,
   "end_elevation_m": 469.9431821533783,
   "min_gradient_pct": 1.8422603797748138,
   "suppressed_max_gradient_pct": 28.016685102522274,
   "suppressed_location_m": [
    165.0,
    185.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.608758202941544,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 248.0,
   "end_distance_m": 273.0,
   "start_elevation_m": 465.25873205389945,
   "end_elevation_m": 471.66092160463484,
   "min_gradient_pct": 2.8600670536980033,
   "suppressed_max_gradient_pct": 26.170442604380696,
   "suppressed_location_m": [
    162.0,
    187.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.30767578179882,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 242.0,
   "end_distance_m": 292.0,
   "start_elevation_m": 463.7862592691129,
   "end_elevation_m": 476.44009716001233,
   "min_gradient_pct": 6.096355441069136
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.064144958414264,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 193.0,
   "end_distance_m": 293.0,
   "start_elevation_m": 454.6109154426593,
   "end_elevation_m": 476.67506040107355,
   "min_gradient_pct": 7.782948155156305
  }
 ],
 "shape": {
  "ascent_concentration": 0.337,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 460.0,
  "shape_class": "sustained"
 },
 "length_m": 901.7297929058965,
 "start_elevation_m": 421.227616279953,
 "end_elevation_m": 559.4189099511689,
 "endpoint_gain_m": 138.19129367121587,
 "overall_gradient_pct": 15.325133400093543,
 "accumulated_ascent_m": 138.78632379711416,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.148414695055635,
   "start_distance_m": 172.0,
   "end_distance_m": 177.0,
   "midpoint_distance_m": 174.5,
   "start_elevation_m": 449.72735278909573,
   "end_elevation_m": 451.2847735238485,
   "start_xy": [
    313548.42372911127,
    4697491.300414923
   ],
   "end_xy": [
    313548.2814701566,
    4697496.298390122
   ]
  },
  "max_10m": {
   "gradient_pct": 29.871402216533625,
   "start_distance_m": 172.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 449.72735278909573,
   "end_elevation_m": 452.7144930107491,
   "start_xy": [
    313548.42372911127,
    4697491.300414923
   ],
   "end_xy": [
    313547.7328618015,
    4697501.258783416
   ]
  },
  "max_20m": {
   "gradient_pct": 26.021325658585965,
   "start_distance_m": 246.0,
   "end_distance_m": 266.0,
   "midpoint_distance_m": 256.0,
   "start_elevation_m": 464.7389170216611,
   "end_elevation_m": 469.9431821533783,
   "start_xy": [
    313532.6049774995,
    4697563.425515678
   ],
   "end_xy": [
    313527.714041108,
    4697582.818262809
   ]
  },
  "max_25m": {
   "gradient_pct": 25.608758202941544,
   "start_distance_m": 248.0,
   "end_distance_m": 273.0,
   "midpoint_distance_m": 260.5,
   "start_elevation_m": 465.25873205389945,
   "end_elevation_m": 471.66092160463484,
   "start_xy": [
    313532.11608150136,
    4697565.364840267
   ],
   "end_xy": [
    313526.00281072425,
    4697589.605875135
   ]
  },
  "max_50m": {
   "gradient_pct": 25.30767578179882,
   "start_distance_m": 242.0,
   "end_distance_m": 292.0,
   "midpoint_distance_m": 267.0,
   "start_elevation_m": 463.7862592691129,
   "end_elevation_m": 476.44009716001233,
   "start_xy": [
    313533.58311857504,
    4697559.546954845
   ],
   "end_xy": [
    313521.3561294412,
    4697608.028911648
   ]
  },
  "max_100m": {
   "gradient_pct": 22.064144958414264,
   "start_distance_m": 193.0,
   "end_distance_m": 293.0,
   "midpoint_distance_m": 243.0,
   "start_elevation_m": 454.6109154426593,
   "end_elevation_m": 476.67506040107355,
   "start_xy": [
    313545.56585262844,
    4697512.0347094005
   ],
   "end_xy": [
    313521.11187458155,
    4697608.998622573
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.687605092297872,
   "start_distance_m": 112.0,
   "end_distance_m": 117.0,
   "midpoint_distance_m": 114.5,
   "start_elevation_m": 443.5822589845034,
   "end_elevation_m": 443.14787872988853,
   "start_xy": [
    313551.68127613346,
    4697431.426898285
   ],
   "end_xy": [
    313551.1660042358,
    4697436.400276783
   ]
  },
  "min_10m": {
   "gradient_pct": -4.453721005061766,
   "start_distance_m": 109.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 114.0,
   "start_elevation_m": 443.57461748926784,
   "end_elevation_m": 443.12924538876166,
   "start_xy": [
    313552.1833549621,
    4697428.482058543
   ],
   "end_xy": [
    313550.9592345497,
    4697438.389559447
   ]
  },
  "min_20m": {
   "gradient_pct": 1.8422603797748138,
   "start_distance_m": 110.0,
   "end_distance_m": 130.0,
   "midpoint_distance_m": 120.0,
   "start_elevation_m": 443.6728138011142,
   "end_elevation_m": 444.0412658770692,
   "start_xy": [
    313551.91003544524,
    4697429.440219546
   ],
   "end_xy": [
    313549.8242810195,
    4697449.330851132
   ]
  },
  "min_25m": {
   "gradient_pct": 2.8600670536980033,
   "start_distance_m": 107.0,
   "end_distance_m": 132.0,
   "midpoint_distance_m": 119.5,
   "start_elevation_m": 443.35408297775217,
   "end_elevation_m": 444.0690997411767,
   "start_xy": [
    313552.8283971664,
    4697426.588934421
   ],
   "end_xy": [
    313549.6185272378,
    4697451.3202392
   ]
  },
  "min_50m": {
   "gradient_pct": 6.096355441069136,
   "start_distance_m": 851.0,
   "end_distance_m": 901.0,
   "midpoint_distance_m": 876.0,
   "start_elevation_m": 556.3583158679942,
   "end_elevation_m": 559.4064935885287,
   "start_xy": [
    313365.30790135666,
    4698141.507646092
   ],
   "end_xy": [
    313343.8448845704,
    4698186.666681465
   ]
  },
  "min_100m": {
   "gradient_pct": 7.782948155156305,
   "start_distance_m": 801.0,
   "end_distance_m": 901.0,
   "midpoint_distance_m": 851.0,
   "start_elevation_m": 551.6235454333724,
   "end_elevation_m": 559.4064935885287,
   "start_xy": [
    313384.7361480975,
    4698095.471482518
   ],
   "end_xy": [
    313343.8448845704,
    4698186.666681465
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.66351401603822,
   "start_distance_m": 173.0,
   "end_distance_m": 175.0,
   "midpoint_distance_m": 174.0,
   "start_elevation_m": 450.0365865715214,
   "end_elevation_m": 450.7098568518422,
   "start_xy": [
    313548.39545956015,
    4697492.300015167
   ],
   "end_xy": [
    313548.3384755899,
    4697494.299202956
   ]
  },
  "max_3m": {
   "gradient_pct": 32.75013542488144,
   "start_distance_m": 172.0,
   "end_distance_m": 175.0,
   "midpoint_distance_m": 173.5,
   "start_elevation_m": 449.72735278909573,
   "end_elevation_m": 450.7098568518422,
   "start_xy": [
    313548.42372911127,
    4697491.300414923
   ],
   "end_xy": [
    313548.3384755899,
    4697494.299202956
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.18,
   "windows_resited": [
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.652,
   "obstruction_max_height_m": 31.15,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    50.0
   ],
   [
    60.0,
    170.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_x31y470_NY_FingerLakes_2020_A20.tif"
  ],
  "calculated_at": "2026-09-08T19:08:49+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": "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_FingerLakes_2020_A20 (collected 2020)",
  "elevation_tile_ids": [
   "x31y470"
  ],
  "route_base_cut_m": 1122.2,
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/NY_FingerLakes_1_2020",
   "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": "Urbana",
  "county": "New York"
 }
}