{
 "ocl_version": "0.1.0",
 "name": "Buffum Road",
 "slug": "buffum-road-ct",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.578865988215682,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 843.0,
   "end_distance_m": 845.0,
   "start_elevation_m": 208.07964330816176,
   "end_elevation_m": 208.59122062792608,
   "min_gradient_pct": -14.147816066555663
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.382445642369095,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 842.0,
   "end_distance_m": 845.0,
   "start_elevation_m": 207.829747258655,
   "end_elevation_m": 208.59122062792608,
   "min_gradient_pct": -13.82934625229287
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.847120143589905,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 841.0,
   "end_distance_m": 846.0,
   "start_elevation_m": 207.58745080021367,
   "end_elevation_m": 208.82980680739317,
   "min_gradient_pct": -13.58132787222985
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.571540737533724,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 841.0,
   "end_distance_m": 851.0,
   "start_elevation_m": 207.58745080021367,
   "end_elevation_m": 210.04460487396705,
   "min_gradient_pct": -13.09387337433293
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.462157718940375,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 836.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 206.44788171528052,
   "end_elevation_m": 211.1403132590686,
   "min_gradient_pct": -12.644920972639113
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.707992624084795,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 831.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 205.4633151030474,
   "end_elevation_m": 211.1403132590686,
   "min_gradient_pct": -12.36368996932947
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.24209560501282,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 811.0,
   "end_distance_m": 861.0,
   "start_elevation_m": 202.3428229586444,
   "end_elevation_m": 211.96387076115082,
   "min_gradient_pct": -10.625552937384498
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.50453059080971,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1386.0,
   "end_distance_m": 1486.0,
   "start_elevation_m": 255.46830819480417,
   "end_elevation_m": 269.9728387856139,
   "min_gradient_pct": -9.094881135273909
  }
 ],
 "shape": {
  "ascent_concentration": 0.429,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 357.0,
  "shape_class": "sustained"
 },
 "length_m": 1982.906554379228,
 "start_elevation_m": 191.09223230743595,
 "end_elevation_m": 311.36451256103777,
 "endpoint_gain_m": 120.27228025360182,
 "overall_gradient_pct": 6.06545376472642,
 "accumulated_ascent_m": 146.17039683963594,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.847120143589905,
   "start_distance_m": 841.0,
   "end_distance_m": 846.0,
   "midpoint_distance_m": 843.5,
   "start_elevation_m": 207.58745080021367,
   "end_elevation_m": 208.82980680739317,
   "start_xy": [
    639050.1011144063,
    4613811.836893828
   ],
   "end_xy": [
    639046.317983121,
    4613808.575426771
   ]
  },
  "max_10m": {
   "gradient_pct": 24.571540737533724,
   "start_distance_m": 841.0,
   "end_distance_m": 851.0,
   "midpoint_distance_m": 846.0,
   "start_elevation_m": 207.58745080021367,
   "end_elevation_m": 210.04460487396705,
   "start_xy": [
    639050.1011144063,
    4613811.836893828
   ],
   "end_xy": [
    639042.3934532193,
    4613805.477352361
   ]
  },
  "max_20m": {
   "gradient_pct": 23.462157718940375,
   "start_distance_m": 836.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 846.0,
   "start_elevation_m": 206.44788171528052,
   "end_elevation_m": 211.1403132590686,
   "start_xy": [
    639053.7305529728,
    4613815.275959935
   ],
   "end_xy": [
    639038.4689233175,
    4613802.379277951
   ]
  },
  "max_25m": {
   "gradient_pct": 22.707992624084795,
   "start_distance_m": 831.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 843.5,
   "start_elevation_m": 205.4633151030474,
   "end_elevation_m": 211.1403132590686,
   "start_xy": [
    639057.3464056813,
    4613818.728357691
   ],
   "end_xy": [
    639038.4689233175,
    4613802.379277951
   ]
  },
  "max_50m": {
   "gradient_pct": 19.24209560501282,
   "start_distance_m": 811.0,
   "end_distance_m": 861.0,
   "midpoint_distance_m": 836.0,
   "start_elevation_m": 202.3428229586444,
   "end_elevation_m": 211.96387076115082,
   "start_xy": [
    639070.0646437627,
    4613834.144298489
   ],
   "end_xy": [
    639034.5443934158,
    4613799.281203541
   ]
  },
  "max_100m": {
   "gradient_pct": 14.50453059080971,
   "start_distance_m": 1386.0,
   "end_distance_m": 1486.0,
   "midpoint_distance_m": 1436.0,
   "start_elevation_m": 255.46830819480417,
   "end_elevation_m": 269.9728387856139,
   "start_xy": [
    638643.7639251676,
    4614118.349134338
   ],
   "end_xy": [
    638567.021362219,
    4614182.318486384
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.58132787222985,
   "start_distance_m": 692.0,
   "end_distance_m": 697.0,
   "midpoint_distance_m": 694.5,
   "start_elevation_m": 202.59049527426026,
   "end_elevation_m": 201.91142888064877,
   "start_xy": [
    639126.9679720305,
    4613936.532077275
   ],
   "end_xy": [
    639124.9554493265,
    4613931.958964493
   ]
  },
  "min_10m": {
   "gradient_pct": -13.09387337433293,
   "start_distance_m": 689.0,
   "end_distance_m": 699.0,
   "midpoint_distance_m": 694.0,
   "start_elevation_m": 202.95816956971487,
   "end_elevation_m": 201.64878223228158,
   "start_xy": [
    639128.3301700725,
    4613939.204770795
   ],
   "end_xy": [
    639124.198789907,
    4613930.1076226765
   ]
  },
  "min_20m": {
   "gradient_pct": -12.644920972639113,
   "start_distance_m": 684.0,
   "end_distance_m": 704.0,
   "midpoint_distance_m": 694.0,
   "start_elevation_m": 203.567387256575,
   "end_elevation_m": 201.03840306204717,
   "start_xy": [
    639130.875127544,
    4613943.508628538
   ],
   "end_xy": [
    639122.7980067388,
    4613925.310756191
   ]
  },
  "min_25m": {
   "gradient_pct": -12.36368996932947,
   "start_distance_m": 681.0,
   "end_distance_m": 706.0,
   "midpoint_distance_m": 693.5,
   "start_elevation_m": 203.90376761332772,
   "end_elevation_m": 200.81284512099535,
   "start_xy": [
    639132.5272546016,
    4613946.01141023
   ],
   "end_xy": [
    639122.3526003468,
    4613923.360983602
   ]
  },
  "min_50m": {
   "gradient_pct": -10.625552937384498,
   "start_distance_m": 670.0,
   "end_distance_m": 720.0,
   "midpoint_distance_m": 695.0,
   "start_elevation_m": 204.91761736235608,
   "end_elevation_m": 199.60484089366383,
   "start_xy": [
    639138.8701423438,
    4613954.994938969
   ],
   "end_xy": [
    639119.2347556024,
    4613909.712575484
   ]
  },
  "min_100m": {
   "gradient_pct": -9.094881135273909,
   "start_distance_m": 616.0,
   "end_distance_m": 716.0,
   "midpoint_distance_m": 666.0,
   "start_elevation_m": 208.96725176988724,
   "end_elevation_m": 199.87237063461333,
   "start_xy": [
    639171.3611894564,
    4613998.126162069
   ],
   "end_xy": [
    639120.1255683865,
    4613913.612120661
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.578865988215682,
   "start_distance_m": 843.0,
   "end_distance_m": 845.0,
   "midpoint_distance_m": 844.0,
   "start_elevation_m": 208.07964330816176,
   "end_elevation_m": 208.59122062792608,
   "start_xy": [
    639048.6493389796,
    4613810.461267385
   ],
   "end_xy": [
    639047.1028891014,
    4613809.195041653
   ]
  },
  "max_3m": {
   "gradient_pct": 25.382445642369095,
   "start_distance_m": 842.0,
   "end_distance_m": 845.0,
   "midpoint_distance_m": 843.5,
   "start_elevation_m": 207.829747258655,
   "end_elevation_m": 208.59122062792608,
   "start_xy": [
    639049.3752266929,
    4613811.149080606
   ],
   "end_xy": [
    639047.1028891014,
    4613809.195041653
   ]
  }
 },
 "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": [
   "descends_at_start"
  ]
 },
 "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_x63y462_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-08-24T22:06:01+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": [
   "x63y462"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.7% over 200 m (Terrain 50), gain 22.9 m over 872 m way. EXTENDED by graph walk: +0 segment(s) at base, +2 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): kielwasser-road ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'. Slug suffixed -ct (suffix(nh:buffum-road)); doc slug patched at corpus copy.",
  "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": "Washington",
  "county": "Connecticut"
 }
}