{
 "ocl_version": "0.1.0",
 "name": "Barrington Place",
 "slug": "barrington-place",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.93779374948508,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 232.0,
   "end_distance_m": 234.0,
   "start_elevation_m": 262.9021257611422,
   "end_elevation_m": 263.3808816361319,
   "min_gradient_pct": 2.961285411981862
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.66388589181459,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 232.0,
   "end_distance_m": 235.0,
   "start_elevation_m": 262.9021257611422,
   "end_elevation_m": 263.61204233789664,
   "min_gradient_pct": 3.1304550964250666
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.956015770770364,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 231.0,
   "end_distance_m": 236.0,
   "start_elevation_m": 262.67766745258797,
   "end_elevation_m": 263.8254682411265,
   "min_gradient_pct": 3.2441374024210745
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.546131362035794,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 227.0,
   "end_distance_m": 237.0,
   "start_elevation_m": 261.87679866720237,
   "end_elevation_m": 264.03141180340594,
   "min_gradient_pct": 3.42215200749024
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.5237568052587,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 237.0,
   "start_elevation_m": 259.9266604423542,
   "end_elevation_m": 264.03141180340594,
   "min_gradient_pct": 3.442118879866314
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.308701755066068,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 212.0,
   "end_distance_m": 237.0,
   "start_elevation_m": 258.9542363646394,
   "end_elevation_m": 264.03141180340594,
   "min_gradient_pct": 3.5366718684264242
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.18639019901798,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 188.0,
   "end_distance_m": 238.0,
   "start_elevation_m": 254.62039071750434,
   "end_elevation_m": 264.2135858170133,
   "min_gradient_pct": 3.8029936842472125
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.236027439833947,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 139.0,
   "end_distance_m": 239.0,
   "start_elevation_m": 248.12669968725606,
   "end_elevation_m": 264.36272712709,
   "min_gradient_pct": 4.382759895798898
  }
 ],
 "shape": {
  "ascent_concentration": 0.474,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 101.0,
  "shape_class": "stepped"
 },
 "length_m": 239.82332322104295,
 "start_elevation_m": 240.82474620452393,
 "end_elevation_m": 264.4352376174876,
 "endpoint_gain_m": 23.610491412963654,
 "overall_gradient_pct": 9.844952148879234,
 "accumulated_ascent_m": 23.610491412963654,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.956015770770364,
   "start_distance_m": 231.0,
   "end_distance_m": 236.0,
   "midpoint_distance_m": 233.5,
   "start_elevation_m": 262.67766745258797,
   "end_elevation_m": 263.8254682411265,
   "start_xy": [
    634308.5643214495,
    4672577.816163741
   ],
   "end_xy": [
    634303.8935634806,
    4672579.600545986
   ]
  },
  "max_10m": {
   "gradient_pct": 21.546131362035794,
   "start_distance_m": 227.0,
   "end_distance_m": 237.0,
   "midpoint_distance_m": 232.0,
   "start_elevation_m": 261.87679866720237,
   "end_elevation_m": 264.03141180340594,
   "start_xy": [
    634312.3009278247,
    4672576.388657945
   ],
   "end_xy": [
    634302.9594118868,
    4672579.957422434
   ]
  },
  "max_20m": {
   "gradient_pct": 20.5237568052587,
   "start_distance_m": 217.0,
   "end_distance_m": 237.0,
   "midpoint_distance_m": 227.0,
   "start_elevation_m": 259.9266604423542,
   "end_elevation_m": 264.03141180340594,
   "start_xy": [
    634321.6424437626,
    4672572.819893455
   ],
   "end_xy": [
    634302.9594118868,
    4672579.957422434
   ]
  },
  "max_25m": {
   "gradient_pct": 20.308701755066068,
   "start_distance_m": 212.0,
   "end_distance_m": 237.0,
   "midpoint_distance_m": 224.5,
   "start_elevation_m": 258.9542363646394,
   "end_elevation_m": 264.03141180340594,
   "start_xy": [
    634326.3132017315,
    4672571.035511211
   ],
   "end_xy": [
    634302.9594118868,
    4672579.957422434
   ]
  },
  "max_50m": {
   "gradient_pct": 19.18639019901798,
   "start_distance_m": 188.0,
   "end_distance_m": 238.0,
   "midpoint_distance_m": 213.0,
   "start_elevation_m": 254.62039071750434,
   "end_elevation_m": 264.2135858170133,
   "start_xy": [
    634349.2369544378,
    4672564.105956824
   ],
   "end_xy": [
    634302.0252602929,
    4672580.314298883
   ]
  },
  "max_100m": {
   "gradient_pct": 16.236027439833947,
   "start_distance_m": 139.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 189.0,
   "start_elevation_m": 248.12669968725606,
   "end_elevation_m": 264.36272712709,
   "start_xy": [
    634396.9705603203,
    4672553.041761276
   ],
   "end_xy": [
    634301.0911086992,
    4672580.671175333
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 3.2441374024210745,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 240.82474620452393,
   "end_elevation_m": 240.986953074645,
   "start_xy": [
    634533.195,
    4672525.962
   ],
   "end_xy": [
    634528.3367436202,
    4672527.14409346
   ]
  },
  "min_10m": {
   "gradient_pct": 3.42215200749024,
   "start_distance_m": 7.0,
   "end_distance_m": 17.0,
   "midpoint_distance_m": 12.0,
   "start_elevation_m": 241.06958663498193,
   "end_elevation_m": 241.41180183573096,
   "start_xy": [
    634526.3934410682,
    4672527.616930844
   ],
   "end_xy": [
    634516.6769283087,
    4672529.9811177645
   ]
  },
  "min_20m": {
   "gradient_pct": 3.442118879866314,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 240.85542406599973,
   "end_elevation_m": 241.543847841973,
   "start_xy": [
    634532.223348724,
    4672526.198418693
   ],
   "end_xy": [
    634512.7903232048,
    4672530.926792532
   ]
  },
  "min_25m": {
   "gradient_pct": 3.5366718684264242,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 240.82474620452393,
   "end_elevation_m": 241.70891417163054,
   "start_xy": [
    634533.195,
    4672525.962
   ],
   "end_xy": [
    634508.9037181011,
    4672531.872467301
   ]
  },
  "min_50m": {
   "gradient_pct": 3.8029936842472125,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 240.82474620452393,
   "end_elevation_m": 242.72624304664754,
   "start_xy": [
    634533.195,
    4672525.962
   ],
   "end_xy": [
    634484.2720009177,
    4672536.034243997
   ]
  },
  "min_100m": {
   "gradient_pct": 4.382759895798898,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 240.82474620452393,
   "end_elevation_m": 245.20750610032283,
   "start_xy": [
    634533.195,
    4672525.962
   ],
   "end_xy": [
    634435.0284253067,
    4672544.521295766
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.93779374948508,
   "start_distance_m": 232.0,
   "end_distance_m": 234.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 262.9021257611422,
   "end_elevation_m": 263.3808816361319,
   "start_xy": [
    634307.6301698558,
    4672578.17304019
   ],
   "end_xy": [
    634305.7618666681,
    4672578.886793087
   ]
  },
  "max_3m": {
   "gradient_pct": 23.66388589181459,
   "start_distance_m": 232.0,
   "end_distance_m": 235.0,
   "midpoint_distance_m": 233.5,
   "start_elevation_m": 262.9021257611422,
   "end_elevation_m": 263.61204233789664,
   "start_xy": [
    634307.6301698558,
    4672578.17304019
   ],
   "end_xy": [
    634304.8277150744,
    4672579.243669537
   ]
  }
 },
 "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": [
   "may_continue_beyond_end"
  ]
 },
 "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/ma/USGS_1M_18_x63y468_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-08-24T21:46:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/massachusetts-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-ma-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, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x63y468"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.0% over 200 m (Terrain 50), gain 22.4 m over 209 m way. EXTENDED by graph walk: +1 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": "Great Barrington",
  "county": "Massachusetts"
 }
}