{
 "ocl_version": "0.1.0",
 "name": "Cemetery Road",
 "slug": "cemetery-road-10",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.130490725003483,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1106.0,
   "end_distance_m": 1108.0,
   "start_elevation_m": 481.8559194305445,
   "end_elevation_m": 482.31852924504454,
   "min_gradient_pct": -1.9764247106365929
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.125770510775585,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1106.0,
   "end_distance_m": 1109.0,
   "start_elevation_m": 481.8559194305445,
   "end_elevation_m": 482.54969254586774,
   "min_gradient_pct": -1.8200133940581509
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.115564520909402,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1106.0,
   "end_distance_m": 1111.0,
   "start_elevation_m": 481.8559194305445,
   "end_elevation_m": 483.01169765658994,
   "min_gradient_pct": -1.585250178594606
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.515256822106267,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1102.0,
   "end_distance_m": 1112.0,
   "start_elevation_m": 480.976338635345,
   "end_elevation_m": 483.2278643175556,
   "min_gradient_pct": -1.5135554025067677
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.841675305308854,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1092.0,
   "end_distance_m": 1112.0,
   "start_elevation_m": 478.85952925649383,
   "end_elevation_m": 483.2278643175556,
   "min_gradient_pct": -1.2496747688999221
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.448261790189463,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1088.0,
   "end_distance_m": 1113.0,
   "start_elevation_m": 478.06381914166616,
   "end_elevation_m": 483.4258845892135,
   "min_gradient_pct": -1.1941214200512604
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.90614100095354,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1078.0,
   "end_distance_m": 1128.0,
   "start_elevation_m": 476.346933063494,
   "end_elevation_m": 485.8000035639708,
   "min_gradient_pct": -1.0197043593254875
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.346848167875237,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1048.0,
   "end_distance_m": 1148.0,
   "start_elevation_m": 474.83273937324464,
   "end_elevation_m": 487.1795875411199,
   "min_gradient_pct": -0.3650273462008613
  }
 ],
 "shape": {
  "ascent_concentration": 0.429,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 68.0,
  "shape_class": "sustained"
 },
 "length_m": 1165.0000000000002,
 "start_elevation_m": 435.6352080726933,
 "end_elevation_m": 487.22033530640607,
 "endpoint_gain_m": 51.5851272337128,
 "overall_gradient_pct": 4.427907917056891,
 "accumulated_ascent_m": 52.37034200034384,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.115564520909402,
   "start_distance_m": 1106.0,
   "end_distance_m": 1111.0,
   "midpoint_distance_m": 1108.5,
   "start_elevation_m": 481.8559194305445,
   "end_elevation_m": 483.01169765658994,
   "start_xy": [
    521645.40750457026,
    4627867.21802266
   ],
   "end_xy": [
    521640.4296423614,
    4627867.688009657
   ]
  },
  "max_10m": {
   "gradient_pct": 22.515256822106267,
   "start_distance_m": 1102.0,
   "end_distance_m": 1112.0,
   "midpoint_distance_m": 1107.0,
   "start_elevation_m": 480.976338635345,
   "end_elevation_m": 483.2278643175556,
   "start_xy": [
    521649.3896966732,
    4627866.841004531
   ],
   "end_xy": [
    521639.4341551574,
    4627867.782904784
   ]
  },
  "max_20m": {
   "gradient_pct": 21.841675305308854,
   "start_distance_m": 1092.0,
   "end_distance_m": 1112.0,
   "midpoint_distance_m": 1102.0,
   "start_elevation_m": 478.85952925649383,
   "end_elevation_m": 483.2278643175556,
   "start_xy": [
    521659.34532695985,
    4627865.900039423
   ],
   "end_xy": [
    521639.4341551574,
    4627867.782904784
   ]
  },
  "max_25m": {
   "gradient_pct": 21.448261790189463,
   "start_distance_m": 1088.0,
   "end_distance_m": 1113.0,
   "midpoint_distance_m": 1100.5,
   "start_elevation_m": 478.06381914166616,
   "end_elevation_m": 483.4258845892135,
   "start_xy": [
    521663.32761319383,
    4627865.524012409
   ],
   "end_xy": [
    521638.43859337544,
    4627867.877014279
   ]
  },
  "max_50m": {
   "gradient_pct": 18.90614100095354,
   "start_distance_m": 1078.0,
   "end_distance_m": 1128.0,
   "midpoint_distance_m": 1103.0,
   "start_elevation_m": 476.346933063494,
   "end_elevation_m": 485.8000035639708,
   "start_xy": [
    521673.2832423559,
    4627864.583034391
   ],
   "end_xy": [
    521623.5051084956,
    4627869.288047037
   ]
  },
  "max_100m": {
   "gradient_pct": 12.346848167875237,
   "start_distance_m": 1048.0,
   "end_distance_m": 1148.0,
   "midpoint_distance_m": 1098.0,
   "start_elevation_m": 474.83273937324464,
   "end_elevation_m": 487.1795875411199,
   "start_xy": [
    521676.84626933065,
    4627844.069805018
   ],
   "end_xy": [
    521603.5944094106,
    4627871.175893681
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.585250178594606,
   "start_distance_m": 817.0,
   "end_distance_m": 822.0,
   "midpoint_distance_m": 819.5,
   "start_elevation_m": 472.0424498285624,
   "end_elevation_m": 471.96318731963265,
   "start_xy": [
    521609.38206200406,
    4627623.1443781685
   ],
   "end_xy": [
    521610.8009952625,
    4627627.938814988
   ]
  },
  "min_10m": {
   "gradient_pct": -1.5135554025067677,
   "start_distance_m": 816.0,
   "end_distance_m": 826.0,
   "midpoint_distance_m": 821.0,
   "start_elevation_m": 472.05503206129566,
   "end_elevation_m": 471.903676521045,
   "start_xy": [
    521609.0979295629,
    4627622.185593137
   ],
   "end_xy": [
    521611.9370761476,
    4627631.774088118
   ]
  },
  "min_20m": {
   "gradient_pct": -1.2496747688999221,
   "start_distance_m": 813.0,
   "end_distance_m": 833.0,
   "midpoint_distance_m": 823.0,
   "start_elevation_m": 472.0895789835852,
   "end_elevation_m": 471.83964402980524,
   "start_xy": [
    521608.24638375745,
    4627619.308985949
   ],
   "end_xy": [
    521613.92339321703,
    4627638.4863558365
   ]
  },
  "min_25m": {
   "gradient_pct": -1.1941214200512604,
   "start_distance_m": 813.0,
   "end_distance_m": 838.0,
   "midpoint_distance_m": 825.5,
   "start_elevation_m": 472.0895789835852,
   "end_elevation_m": 471.7910486285724,
   "start_xy": [
    521608.24638375745,
    4627619.308985949
   ],
   "end_xy": [
    521615.3429353713,
    4627643.280612751
   ]
  },
  "min_50m": {
   "gradient_pct": -1.0197043593254875,
   "start_distance_m": 812.0,
   "end_distance_m": 862.0,
   "midpoint_distance_m": 837.0,
   "start_elevation_m": 472.0986071048396,
   "end_elevation_m": 471.58875492517683,
   "start_xy": [
    521607.9630404323,
    4627618.349967516
   ],
   "end_xy": [
    521622.20131409774,
    4627666.279797971
   ]
  },
  "min_100m": {
   "gradient_pct": -0.3650273462008613,
   "start_distance_m": 782.0,
   "end_distance_m": 882.0,
   "midpoint_distance_m": 832.0,
   "start_elevation_m": 471.9575865684024,
   "end_elevation_m": 471.59255922220154,
   "start_xy": [
    521598.51534529036,
    4627589.883218041
   ],
   "end_xy": [
    521627.91633667285,
    4627685.445873668
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.130490725003483,
   "start_distance_m": 1106.0,
   "end_distance_m": 1108.0,
   "midpoint_distance_m": 1107.0,
   "start_elevation_m": 481.8559194305445,
   "end_elevation_m": 482.31852924504454,
   "start_xy": [
    521645.40750457026,
    4627867.21802266
   ],
   "end_xy": [
    521643.4163614533,
    4627867.406036168
   ]
  },
  "max_3m": {
   "gradient_pct": 23.125770510775585,
   "start_distance_m": 1106.0,
   "end_distance_m": 1109.0,
   "midpoint_distance_m": 1107.5,
   "start_elevation_m": 481.8559194305445,
   "end_elevation_m": 482.54969254586774,
   "start_xy": [
    521645.40750457026,
    4627867.21802266
   ],
   "end_xy": [
    521642.4207854784,
    4627867.49999615
   ]
  }
 },
 "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": 0.139,
   "obstruction_max_height_m": 22.98,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    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_x52y463_NY_FEMAR2_Central_2018_D19.tif"
  ],
  "calculated_at": "2026-09-15T02:40:24+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.osm.pbf",
  "osm_snapshot": "2026-09-04T20:21:21Z",
  "run_id": "retro-260914",
  "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": [
   "x52y463"
  ],
  "route_cut_m": 1165.0,
  "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": 0.999,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Liberty",
  "county": "New York"
 }
}