{
 "ocl_version": "0.1.0",
 "name": "Buckboard Ridge",
 "slug": "buckboard-ridge",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.40542345541263,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 277.0,
   "end_distance_m": 279.0,
   "start_elevation_m": 76.91974545295184,
   "end_elevation_m": 77.3478539220601,
   "min_gradient_pct": -4.883325402072103
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.072843490838505,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 277.0,
   "end_distance_m": 280.0,
   "start_elevation_m": 76.91974545295184,
   "end_elevation_m": 77.551930757677,
   "min_gradient_pct": -4.806161617489124
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.063180924507776,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 278.0,
   "end_distance_m": 283.0,
   "start_elevation_m": 77.12889863811736,
   "end_elevation_m": 78.18205768434275,
   "min_gradient_pct": -4.698610787566793
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.88990546403906,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 276.0,
   "end_distance_m": 286.0,
   "start_elevation_m": 76.71610432034404,
   "end_elevation_m": 78.80509486674795,
   "min_gradient_pct": -4.398190956076888
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.584036129420014,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 272.0,
   "end_distance_m": 292.0,
   "start_elevation_m": 75.91021322578106,
   "end_elevation_m": 80.02702045166507,
   "min_gradient_pct": -3.480828632902302
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.333320054809803,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 269.0,
   "end_distance_m": 294.0,
   "start_elevation_m": 75.33125209766443,
   "end_elevation_m": 80.41458211136688,
   "min_gradient_pct": -3.0228484457841773
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.9961243222329,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 259.0,
   "end_distance_m": 309.0,
   "start_elevation_m": 73.569308108897,
   "end_elevation_m": 83.06737027001346,
   "min_gradient_pct": -1.7976356185311602
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.108659792367078,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 249.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 72.05735687898712,
   "end_elevation_m": 89.1660166713542,
   "min_gradient_pct": 1.3816117917428556
  }
 ],
 "shape": {
  "ascent_concentration": 0.495,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 133.0,
  "shape_class": "stepped"
 },
 "length_m": 461.3988046619953,
 "start_elevation_m": 54.21118563918186,
 "end_elevation_m": 92.09510221010794,
 "endpoint_gain_m": 37.883916570926075,
 "overall_gradient_pct": 8.210666388413927,
 "accumulated_ascent_m": 38.83535960510993,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.063180924507776,
   "start_distance_m": 278.0,
   "end_distance_m": 283.0,
   "midpoint_distance_m": 280.5,
   "start_elevation_m": 77.12889863811736,
   "end_elevation_m": 78.18205768434275,
   "start_xy": [
    632039.3562063938,
    4559469.279264719
   ],
   "end_xy": [
    632035.244286579,
    4559472.123929099
   ]
  },
  "max_10m": {
   "gradient_pct": 20.88990546403906,
   "start_distance_m": 276.0,
   "end_distance_m": 286.0,
   "midpoint_distance_m": 281.0,
   "start_elevation_m": 76.71610432034404,
   "end_elevation_m": 78.80509486674795,
   "start_xy": [
    632041.0009743198,
    4559468.141398967
   ],
   "end_xy": [
    632032.7626216533,
    4559473.807024086
   ]
  },
  "max_20m": {
   "gradient_pct": 20.584036129420014,
   "start_distance_m": 272.0,
   "end_distance_m": 292.0,
   "midpoint_distance_m": 282.0,
   "start_elevation_m": 75.91021322578106,
   "end_elevation_m": 80.02702045166507,
   "start_xy": [
    632044.2767485315,
    4559465.846199799
   ],
   "end_xy": [
    632027.4357367158,
    4559476.536506827
   ]
  },
  "max_25m": {
   "gradient_pct": 20.333320054809803,
   "start_distance_m": 269.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 281.5,
   "start_elevation_m": 75.33125209766443,
   "end_elevation_m": 80.41458211136688,
   "start_xy": [
    632046.7088082245,
    4559464.08975861
   ],
   "end_xy": [
    632025.4897254795,
    4559476.998069681
   ]
  },
  "max_50m": {
   "gradient_pct": 18.9961243222329,
   "start_distance_m": 259.0,
   "end_distance_m": 309.0,
   "midpoint_distance_m": 284.0,
   "start_elevation_m": 73.569308108897,
   "end_elevation_m": 83.06737027001346,
   "start_xy": [
    632054.8156738678,
    4559458.234954648
   ],
   "end_xy": [
    632010.8444629336,
    4559480.236884791
   ]
  },
  "max_100m": {
   "gradient_pct": 17.108659792367078,
   "start_distance_m": 249.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 299.0,
   "start_elevation_m": 72.05735687898712,
   "end_elevation_m": 89.1660166713542,
   "start_xy": [
    632063.3324572452,
    4559452.995377984
   ],
   "end_xy": [
    631985.0638997596,
    4559506.915920066
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.698610787566793,
   "start_distance_m": 437.0,
   "end_distance_m": 442.0,
   "midpoint_distance_m": 439.5,
   "start_elevation_m": 92.56982810473596,
   "end_elevation_m": 92.33489756535762,
   "start_xy": [
    631979.9081837963,
    4559593.165672946
   ],
   "end_xy": [
    631982.3411757045,
    4559597.508171221
   ]
  },
  "min_10m": {
   "gradient_pct": -4.398190956076888,
   "start_distance_m": 432.0,
   "end_distance_m": 442.0,
   "midpoint_distance_m": 437.0,
   "start_elevation_m": 92.77471666096531,
   "end_elevation_m": 92.33489756535762,
   "start_xy": [
    631978.3052589515,
    4559588.445385763
   ],
   "end_xy": [
    631982.3411757045,
    4559597.508171221
   ]
  },
  "min_20m": {
   "gradient_pct": -3.480828632902302,
   "start_distance_m": 425.0,
   "end_distance_m": 445.0,
   "midpoint_distance_m": 435.0,
   "start_elevation_m": 92.96131906099158,
   "end_elevation_m": 92.26515333441112,
   "start_xy": [
    631976.5686334923,
    4559581.666880522
   ],
   "end_xy": [
    631984.1552471543,
    4559599.897552893
   ]
  },
  "min_25m": {
   "gradient_pct": -3.0228484457841773,
   "start_distance_m": 424.0,
   "end_distance_m": 449.0,
   "midpoint_distance_m": 436.5,
   "start_elevation_m": 92.97296357865334,
   "end_elevation_m": 92.21725146720729,
   "start_xy": [
    631976.347670107,
    4559580.691598418
   ],
   "end_xy": [
    631987.0351113034,
    4559602.54898433
   ]
  },
  "min_50m": {
   "gradient_pct": -1.7976356185311602,
   "start_distance_m": 410.0,
   "end_distance_m": 460.0,
   "midpoint_distance_m": 435.0,
   "start_elevation_m": 92.99971984006203,
   "end_elevation_m": 92.10090203079645,
   "start_xy": [
    631974.9859177696,
    4559566.797153158
   ],
   "end_xy": [
    631996.6760225784,
    4559607.845476545
   ]
  },
  "min_100m": {
   "gradient_pct": 1.3816117917428556,
   "start_distance_m": 361.0,
   "end_distance_m": 461.0,
   "midpoint_distance_m": 411.0,
   "start_elevation_m": 90.71914818491986,
   "end_elevation_m": 92.10075997666272,
   "start_xy": [
    631981.2868911953,
    4559518.301006157
   ],
   "end_xy": [
    631997.552469058,
    4559608.326975837
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.40542345541263,
   "start_distance_m": 277.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 278.0,
   "start_elevation_m": 76.91974545295184,
   "end_elevation_m": 77.3478539220601,
   "start_xy": [
    632040.1785903568,
    4559468.710331843
   ],
   "end_xy": [
    632038.5338224309,
    4559469.848197595
   ]
  },
  "max_3m": {
   "gradient_pct": 21.072843490838505,
   "start_distance_m": 277.0,
   "end_distance_m": 280.0,
   "midpoint_distance_m": 278.5,
   "start_elevation_m": 76.91974545295184,
   "end_elevation_m": 77.551930757677,
   "start_xy": [
    632040.1785903568,
    4559468.710331843
   ],
   "end_xy": [
    632037.711438468,
    4559470.417130471
   ]
  }
 },
 "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": {
  "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/ct/USGS_1M_18_x63y456_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-08-24T21:59:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/connecticut-2026-08-23.osm.pbf",
  "osm_snapshot": "2026-08-22T20:21:28Z",
  "run_id": "redo-ct-2-260824",
  "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, CT_Statewide_C16 (collected 2016)",
  "elevation_tile_ids": [
   "x63y456"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.9% over 200 m (Terrain 50), gain 21.6 m over 224 m way. EXTENDED by graph walk: +3 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Wilton",
  "county": "Connecticut"
 }
}