{
 "ocl_version": "0.1.0",
 "name": "Buckeye Lane",
 "slug": "buckeye-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 28.68595191267893,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 24.0,
   "end_distance_m": 26.0,
   "start_elevation_m": 41.359939173969195,
   "end_elevation_m": 41.933658212222774,
   "min_gradient_pct": -5.1097015513931865
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.887715390053813,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 53.0,
   "end_distance_m": 56.0,
   "start_elevation_m": 47.26770065435782,
   "end_elevation_m": 48.10433211605943,
   "min_gradient_pct": -3.6981898987998343
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.72715275812692,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 52.0,
   "end_distance_m": 57.0,
   "start_elevation_m": 47.01746123029862,
   "end_elevation_m": 48.35381886820497,
   "min_gradient_pct": -2.772646159864962
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.13290618279015,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 46.0,
   "end_distance_m": 56.0,
   "start_elevation_m": 45.59104149778042,
   "end_elevation_m": 48.10433211605943,
   "min_gradient_pct": -2.0089289358402596
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.014285356536618,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 42.0,
   "end_distance_m": 62.0,
   "start_elevation_m": 44.9900656265082,
   "end_elevation_m": 49.39292269781552,
   "min_gradient_pct": -1.113056051566943
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.406679425617796,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 34.0,
   "end_distance_m": 59.0,
   "start_elevation_m": 43.45168625139872,
   "end_elevation_m": 48.80335610780317,
   "min_gradient_pct": -0.8741113612695699
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.551093444222047,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 12.0,
   "end_distance_m": 62.0,
   "start_elevation_m": 39.1173759757045,
   "end_elevation_m": 49.39292269781552,
   "min_gradient_pct": 0.08332086827550711
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.823433963589345,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 7.0,
   "end_distance_m": 107.0,
   "start_elevation_m": 38.3827165872797,
   "end_elevation_m": 56.20615055086905,
   "min_gradient_pct": 1.9768742432698048
  }
 ],
 "shape": {
  "ascent_concentration": 0.548,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 115.0,
  "shape_class": "stepped"
 },
 "length_m": 327.99999999997533,
 "start_elevation_m": 38.056895243132175,
 "end_elevation_m": 65.53817029811701,
 "endpoint_gain_m": 27.481275054984835,
 "overall_gradient_pct": 8.378437516764299,
 "accumulated_ascent_m": 28.233119562689957,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.72715275812692,
   "start_distance_m": 52.0,
   "end_distance_m": 57.0,
   "midpoint_distance_m": 54.5,
   "start_elevation_m": 47.01746123029862,
   "end_elevation_m": 48.35381886820497,
   "start_xy": [
    480040.7102472427,
    4892322.996
   ],
   "end_xy": [
    480035.9224536762,
    4892321.891081931
   ]
  },
  "max_10m": {
   "gradient_pct": 25.13290618279015,
   "start_distance_m": 46.0,
   "end_distance_m": 56.0,
   "midpoint_distance_m": 51.0,
   "start_elevation_m": 45.59104149778042,
   "end_elevation_m": 48.10433211605943,
   "start_xy": [
    480046.4808857537,
    4892321.511673551
   ],
   "end_xy": [
    480036.84155978117,
    4892322.2850920055
   ]
  },
  "max_20m": {
   "gradient_pct": 22.014285356536618,
   "start_distance_m": 42.0,
   "end_distance_m": 62.0,
   "midpoint_distance_m": 52.0,
   "start_elevation_m": 44.9900656265082,
   "end_elevation_m": 49.39292269781552,
   "start_xy": [
    480050.0592408109,
    4892319.724385605
   ],
   "end_xy": [
    480031.7238576575,
    4892319.205937119
   ]
  },
  "max_25m": {
   "gradient_pct": 21.406679425617796,
   "start_distance_m": 34.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 46.5,
   "start_elevation_m": 43.45168625139872,
   "end_elevation_m": 48.80335610780317,
   "start_xy": [
    480057.27110791055,
    4892316.270089586
   ],
   "end_xy": [
    480034.1823169244,
    4892320.925232721
   ]
  },
  "max_50m": {
   "gradient_pct": 20.551093444222047,
   "start_distance_m": 12.0,
   "end_distance_m": 62.0,
   "midpoint_distance_m": 37.0,
   "start_elevation_m": 39.1173759757045,
   "end_elevation_m": 49.39292269781552,
   "start_xy": [
    480077.7755240265,
    4892308.359234368
   ],
   "end_xy": [
    480031.7238576575,
    4892319.205937119
   ]
  },
  "max_100m": {
   "gradient_pct": 17.823433963589345,
   "start_distance_m": 7.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 57.0,
   "start_elevation_m": 38.3827165872797,
   "end_elevation_m": 56.20615055086905,
   "start_xy": [
    480082.2496550332,
    4892306.127161849
   ],
   "end_xy": [
    480000.8337934946,
    4892287.349974414
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.772646159864962,
   "start_distance_m": 283.0,
   "end_distance_m": 288.0,
   "midpoint_distance_m": 285.5,
   "start_elevation_m": 65.23473624482153,
   "end_elevation_m": 65.09610393682829,
   "start_xy": [
    479842.04840781254,
    4892231.035680659
   ],
   "end_xy": [
    479837.05570252775,
    4892231.305669403
   ]
  },
  "min_10m": {
   "gradient_pct": -2.0089289358402596,
   "start_distance_m": 283.0,
   "end_distance_m": 293.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 65.23473624482153,
   "end_elevation_m": 65.03384335123751,
   "start_xy": [
    479842.04840781254,
    4892231.035680659
   ],
   "end_xy": [
    479832.06856882473,
    4892231.649207743
   ]
  },
  "min_20m": {
   "gradient_pct": -1.113056051566943,
   "start_distance_m": 283.0,
   "end_distance_m": 303.0,
   "midpoint_distance_m": 293.0,
   "start_elevation_m": 65.23473624482153,
   "end_elevation_m": 65.01212503450814,
   "start_xy": [
    479842.04840781254,
    4892231.035680659
   ],
   "end_xy": [
    479822.14922531706,
    4892232.872050013
   ]
  },
  "min_25m": {
   "gradient_pct": -0.8741113612695699,
   "start_distance_m": 279.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 291.5,
   "start_elevation_m": 65.21832716704253,
   "end_elevation_m": 64.99979932672514,
   "start_xy": [
    479846.0425710761,
    4892230.819671834
   ],
   "end_xy": [
    479821.1684145952,
    4892233.067012389
   ]
  },
  "min_50m": {
   "gradient_pct": 0.08332086827550711,
   "start_distance_m": 262.0,
   "end_distance_m": 312.0,
   "midpoint_distance_m": 287.0,
   "start_elevation_m": 65.09707714723118,
   "end_elevation_m": 65.13873758136893,
   "start_xy": [
    479863.033860289,
    4892230.515295501
   ],
   "end_xy": [
    479813.234033172,
    4892234.0009100335
   ]
  },
  "min_100m": {
   "gradient_pct": 1.9768742432698048,
   "start_distance_m": 211.0,
   "end_distance_m": 311.0,
   "midpoint_distance_m": 261.0,
   "start_elevation_m": 63.126702181775215,
   "end_elevation_m": 65.10357642504502,
   "start_xy": [
    479905.89076609776,
    4892254.068118288
   ],
   "end_xy": [
    479814.2335944192,
    4892233.972746065
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 28.68595191267893,
   "start_distance_m": 24.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 41.359939173969195,
   "end_elevation_m": 41.933658212222774,
   "start_xy": [
    480066.51123036887,
    4892312.446464036
   ],
   "end_xy": [
    480064.66330245533,
    4892313.211422578
   ]
  },
  "max_3m": {
   "gradient_pct": 27.887715390053813,
   "start_distance_m": 53.0,
   "end_distance_m": 56.0,
   "midpoint_distance_m": 54.5,
   "start_elevation_m": 47.26770065435782,
   "end_elevation_m": 48.10433211605943,
   "start_xy": [
    480039.7102472427,
    4892322.996
   ],
   "end_xy": [
    480036.84155978117,
    4892322.2850920055
   ]
  }
 },
 "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": 0.502,
   "obstruction_max_height_m": 23.31,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/me/USGS_1M_19_x47y490_ME_MidCoast_2021_B21.tif",
   "data/cache/usa/me/USGS_1M_19_x48y490_ME_MidCoast_2021_B21.tif"
  ],
  "calculated_at": "2026-09-03T22:42:59+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/maine-2026-08-22.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "extent-trim-v2-260903",
  "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, ME_MidCoast_2021_B21 (collected 2021)",
  "elevation_tile_ids": [
   "x47y490",
   "x48y490"
  ],
  "route_cut_m": 328.0,
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/ME_MidCoast_2_2021",
   "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.html"
 },
 "area": {
  "place": "Union",
  "county": "Maine"
 }
}