{
 "ocl_version": "0.1.0",
 "name": "Middle Road",
 "slug": "middle-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.715938235431167,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 739.0,
   "end_distance_m": 741.0,
   "start_elevation_m": 398.5787929297179,
   "end_elevation_m": 399.07311169442653,
   "min_gradient_pct": -9.517568124303466
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.497844874568347,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 686.0,
   "end_distance_m": 689.0,
   "start_elevation_m": 388.86036452806735,
   "end_elevation_m": 389.5652998743044,
   "min_gradient_pct": -9.470214482414955
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.571035179254295,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 685.0,
   "end_distance_m": 690.0,
   "start_elevation_m": 388.65158398219535,
   "end_elevation_m": 389.78013574115806,
   "min_gradient_pct": -9.374965848661532
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.270012501085148,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 685.0,
   "end_distance_m": 695.0,
   "start_elevation_m": 388.65158398219535,
   "end_elevation_m": 390.87858523230386,
   "min_gradient_pct": -9.034554781311499
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.519789099335753,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 675.0,
   "end_distance_m": 695.0,
   "start_elevation_m": 386.5746274124367,
   "end_elevation_m": 390.87858523230386,
   "min_gradient_pct": -8.071212687379159
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.984489079644618,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 671.0,
   "end_distance_m": 696.0,
   "start_elevation_m": 385.82455839999267,
   "end_elevation_m": 391.0706806699038,
   "min_gradient_pct": -7.730427942609822
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.919951714151694,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 661.0,
   "end_distance_m": 711.0,
   "start_elevation_m": 384.14664370709033,
   "end_elevation_m": 393.6066195641662,
   "min_gradient_pct": -6.851305538558449
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.09784558083976,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 646.0,
   "end_distance_m": 746.0,
   "start_elevation_m": 381.82081046251955,
   "end_elevation_m": 399.9186560433593,
   "min_gradient_pct": -6.730313223726
  }
 ],
 "shape": {
  "ascent_concentration": 0.512,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 265.0,
  "shape_class": "stepped"
 },
 "length_m": 1160.7835580955716,
 "start_elevation_m": 352.5394861236405,
 "end_elevation_m": 418.4920953988062,
 "endpoint_gain_m": 65.95260927516574,
 "overall_gradient_pct": 5.6817318625162345,
 "accumulated_ascent_m": 79.60990432787514,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.571035179254295,
   "start_distance_m": 685.0,
   "end_distance_m": 690.0,
   "midpoint_distance_m": 687.5,
   "start_elevation_m": 388.65158398219535,
   "end_elevation_m": 389.78013574115806,
   "start_xy": [
    395140.98097723495,
    4657652.368517669
   ],
   "end_xy": [
    395141.0561826659,
    4657647.369083382
   ]
  },
  "max_10m": {
   "gradient_pct": 22.270012501085148,
   "start_distance_m": 685.0,
   "end_distance_m": 695.0,
   "midpoint_distance_m": 690.0,
   "start_elevation_m": 388.65158398219535,
   "end_elevation_m": 390.87858523230386,
   "start_xy": [
    395140.98097723495,
    4657652.368517669
   ],
   "end_xy": [
    395141.2048561179,
    4657642.373384979
   ]
  },
  "max_20m": {
   "gradient_pct": 21.519789099335753,
   "start_distance_m": 675.0,
   "end_distance_m": 695.0,
   "midpoint_distance_m": 685.0,
   "start_elevation_m": 386.5746274124367,
   "end_elevation_m": 390.87858523230386,
   "start_xy": [
    395140.82897957537,
    4657662.3673616415
   ],
   "end_xy": [
    395141.2048561179,
    4657642.373384979
   ]
  },
  "max_25m": {
   "gradient_pct": 20.984489079644618,
   "start_distance_m": 671.0,
   "end_distance_m": 696.0,
   "midpoint_distance_m": 683.5,
   "start_elevation_m": 385.82455839999267,
   "end_elevation_m": 391.0706806699038,
   "start_xy": [
    395140.76898632426,
    4657666.366911717
   ],
   "end_xy": [
    395141.3390504014,
    4657641.382430016
   ]
  },
  "max_50m": {
   "gradient_pct": 18.919951714151694,
   "start_distance_m": 661.0,
   "end_distance_m": 711.0,
   "midpoint_distance_m": 686.0,
   "start_elevation_m": 384.14664370709033,
   "end_elevation_m": 393.6066195641662,
   "start_xy": [
    395140.6171878596,
    4657676.365758777
   ],
   "end_xy": [
    395143.3558497019,
    4657626.518632799
   ]
  },
  "max_100m": {
   "gradient_pct": 18.09784558083976,
   "start_distance_m": 646.0,
   "end_distance_m": 746.0,
   "midpoint_distance_m": 696.0,
   "start_elevation_m": 381.82081046251955,
   "end_elevation_m": 399.9186560433593,
   "start_xy": [
    395140.38998444454,
    4657691.36403703
   ],
   "end_xy": [
    395148.0610612024,
    4657591.836350729
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.374965848661532,
   "start_distance_m": 19.0,
   "end_distance_m": 24.0,
   "midpoint_distance_m": 21.5,
   "start_elevation_m": 354.37284576068214,
   "end_elevation_m": 353.90409746824906,
   "start_xy": [
    395205.0286530931,
    4658312.487971816
   ],
   "end_xy": [
    395204.53349955135,
    4658307.529015338
   ]
  },
  "min_10m": {
   "gradient_pct": -9.034554781311499,
   "start_distance_m": 19.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 24.0,
   "start_elevation_m": 354.37284576068214,
   "end_elevation_m": 353.469390282551,
   "start_xy": [
    395205.0286530931,
    4658312.487971816
   ],
   "end_xy": [
    395203.863511946,
    4658302.574107003
   ]
  },
  "min_20m": {
   "gradient_pct": -8.071212687379159,
   "start_distance_m": 19.0,
   "end_distance_m": 39.0,
   "midpoint_distance_m": 29.0,
   "start_elevation_m": 354.37284576068214,
   "end_elevation_m": 352.7586032232063,
   "start_xy": [
    395205.0286530931,
    4658312.487971816
   ],
   "end_xy": [
    395202.5235367352,
    4658292.664290333
   ]
  },
  "min_25m": {
   "gradient_pct": -7.730427942609822,
   "start_distance_m": 19.0,
   "end_distance_m": 44.0,
   "midpoint_distance_m": 31.5,
   "start_elevation_m": 354.37284576068214,
   "end_elevation_m": 352.4402387750297,
   "start_xy": [
    395205.0286530931,
    4658312.487971816
   ],
   "end_xy": [
    395201.8535491299,
    4658287.7093819985
   ]
  },
  "min_50m": {
   "gradient_pct": -6.851305538558449,
   "start_distance_m": 71.0,
   "end_distance_m": 121.0,
   "midpoint_distance_m": 96.0,
   "start_elevation_m": 350.94063939470476,
   "end_elevation_m": 347.51498662542554,
   "start_xy": [
    395198.2365981715,
    4658260.952744687
   ],
   "end_xy": [
    395191.5375714406,
    4658211.403546998
   ]
  },
  "min_100m": {
   "gradient_pct": -6.730313223726,
   "start_distance_m": 19.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 69.0,
   "start_elevation_m": 354.37284576068214,
   "end_elevation_m": 347.64253253695614,
   "start_xy": [
    395205.0286530931,
    4658312.487971816
   ],
   "end_xy": [
    395191.80556648277,
    4658213.385510332
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.715938235431167,
   "start_distance_m": 739.0,
   "end_distance_m": 741.0,
   "midpoint_distance_m": 740.0,
   "start_elevation_m": 398.5787929297179,
   "end_elevation_m": 399.07311169442653,
   "start_xy": [
    395147.1201331415,
    4657598.772822643
   ],
   "end_xy": [
    395147.3891099942,
    4657596.790992561
   ]
  },
  "max_3m": {
   "gradient_pct": 23.497844874568347,
   "start_distance_m": 686.0,
   "end_distance_m": 689.0,
   "midpoint_distance_m": 687.5,
   "start_elevation_m": 388.86036452806735,
   "end_elevation_m": 389.5652998743044,
   "start_xy": [
    395140.9959785256,
    4657651.368630195
   ],
   "end_xy": [
    395141.04098548274,
    4657648.368967818
   ]
  }
 },
 "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": 0.15,
   "obstruction_max_height_m": 23.03,
   "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_x39y466_NY_FEMAR2_Central_2018_D19.tif"
  ],
  "calculated_at": "2026-09-08T15:38:16+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": [
   "x39y466"
  ],
  "route_base_cut_m": 60.0,
  "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": "Owego",
  "county": "New York"
 }
}