{
 "ocl_version": "0.1.0",
 "name": "Big Bear Hill Road",
 "slug": "big-bear-hill-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.65779114463129,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 304.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 148.24006797538652,
   "end_elevation_m": 148.69322379827915,
   "min_gradient_pct": -12.192943712237536
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.350742737558942,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 302.0,
   "end_distance_m": 305.0,
   "start_elevation_m": 147.7942551682259,
   "end_elevation_m": 148.46477745035267,
   "min_gradient_pct": -11.764048366633043
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.30880017662912,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 301.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 147.5777837894477,
   "end_elevation_m": 148.69322379827915,
   "min_gradient_pct": -11.391149103005773
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.88215505605484,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 297.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 146.7166063094438,
   "end_elevation_m": 148.90482181504927,
   "min_gradient_pct": -11.20743924240685
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.600358489857143,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 287.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 144.58475011707785,
   "end_elevation_m": 148.90482181504927,
   "min_gradient_pct": -11.006553074681449
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.300592442708535,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 283.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 143.76776508960802,
   "end_elevation_m": 149.09291320028515,
   "min_gradient_pct": -10.895422882468552
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.15164899278807,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 278.0,
   "end_distance_m": 328.0,
   "start_elevation_m": 142.8233170898011,
   "end_elevation_m": 152.89914158619513,
   "min_gradient_pct": -10.356129847002137
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.634040533558903,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 215.0,
   "end_distance_m": 315.0,
   "start_elevation_m": 130.8690430511611,
   "end_elevation_m": 150.50308358472,
   "min_gradient_pct": -9.384043219786577
  }
 ],
 "shape": {
  "ascent_concentration": 0.624,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 397.0,
  "shape_class": "stepped"
 },
 "length_m": 1467.465239224949,
 "start_elevation_m": 115.66910911071261,
 "end_elevation_m": 196.0396521337904,
 "endpoint_gain_m": 80.3705430230778,
 "overall_gradient_pct": 5.476827721352092,
 "accumulated_ascent_m": 100.15256764913954,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.30880017662912,
   "start_distance_m": 301.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 303.5,
   "start_elevation_m": 147.5777837894477,
   "end_elevation_m": 148.69322379827915,
   "start_xy": [
    633868.9436944438,
    4611116.892018372
   ],
   "end_xy": [
    633865.6362793829,
    4611120.641819116
   ]
  },
  "max_10m": {
   "gradient_pct": 21.88215505605484,
   "start_distance_m": 297.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 302.0,
   "start_elevation_m": 146.7166063094438,
   "end_elevation_m": 148.90482181504927,
   "start_xy": [
    633871.5896264927,
    4611113.892177777
   ],
   "end_xy": [
    633864.9747963706,
    4611121.391779264
   ]
  },
  "max_20m": {
   "gradient_pct": 21.600358489857143,
   "start_distance_m": 287.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 297.0,
   "start_elevation_m": 144.58475011707785,
   "end_elevation_m": 148.90482181504927,
   "start_xy": [
    633878.2044566147,
    4611106.392576291
   ],
   "end_xy": [
    633864.9747963706,
    4611121.391779264
   ]
  },
  "max_25m": {
   "gradient_pct": 21.300592442708535,
   "start_distance_m": 283.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 295.5,
   "start_elevation_m": 143.76776508960802,
   "end_elevation_m": 149.09291320028515,
   "start_xy": [
    633880.8503886635,
    4611103.392735696
   ],
   "end_xy": [
    633864.3133133585,
    4611122.141739413
   ]
  },
  "max_50m": {
   "gradient_pct": 20.15164899278807,
   "start_distance_m": 278.0,
   "end_distance_m": 328.0,
   "midpoint_distance_m": 303.0,
   "start_elevation_m": 142.8233170898011,
   "end_elevation_m": 152.89914158619513,
   "start_xy": [
    633884.1578037245,
    4611099.642934953
   ],
   "end_xy": [
    633853.4688738731,
    4611138.886974809
   ]
  },
  "max_100m": {
   "gradient_pct": 19.634040533558903,
   "start_distance_m": 215.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 265.0,
   "start_elevation_m": 130.8690430511611,
   "end_elevation_m": 150.50308358472,
   "start_xy": [
    633927.5633808486,
    4611053.986768575
   ],
   "end_xy": [
    633860.1637409105,
    4611127.743422622
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.391149103005773,
   "start_distance_m": 1264.0,
   "end_distance_m": 1269.0,
   "midpoint_distance_m": 1266.5,
   "start_elevation_m": 202.03251843315235,
   "end_elevation_m": 201.46296097800206,
   "start_xy": [
    633356.7361335343,
    4610885.890981857
   ],
   "end_xy": [
    633351.8382730304,
    4610884.885515555
   ]
  },
  "min_10m": {
   "gradient_pct": -11.20743924240685,
   "start_distance_m": 1264.0,
   "end_distance_m": 1274.0,
   "midpoint_distance_m": 1269.0,
   "start_elevation_m": 202.03251843315235,
   "end_elevation_m": 200.91177450891166,
   "start_xy": [
    633356.7361335343,
    4610885.890981857
   ],
   "end_xy": [
    633346.9404125264,
    4610883.880049254
   ]
  },
  "min_20m": {
   "gradient_pct": -11.006553074681449,
   "start_distance_m": 1260.0,
   "end_distance_m": 1280.0,
   "midpoint_distance_m": 1270.0,
   "start_elevation_m": 202.46946182607317,
   "end_elevation_m": 200.26815121113688,
   "start_xy": [
    633360.6293868511,
    4610886.790578981
   ],
   "end_xy": [
    633341.0120466857,
    4610883.054802438
   ]
  },
  "min_25m": {
   "gradient_pct": -10.895422882468552,
   "start_distance_m": 1260.0,
   "end_distance_m": 1285.0,
   "midpoint_distance_m": 1272.5,
   "start_elevation_m": 202.46946182607317,
   "end_elevation_m": 199.74560610545603,
   "start_xy": [
    633360.6293868511,
    4610886.790578981
   ],
   "end_xy": [
    633336.0219976993,
    4610882.739507159
   ]
  },
  "min_50m": {
   "gradient_pct": -10.356129847002137,
   "start_distance_m": 1248.0,
   "end_distance_m": 1298.0,
   "midpoint_distance_m": 1273.0,
   "start_elevation_m": 203.64469542426133,
   "end_elevation_m": 198.46663050076026,
   "start_xy": [
    633371.9939219494,
    4610890.601930655
   ],
   "end_xy": [
    633323.0459152159,
    4610882.429309286
   ]
  },
  "min_100m": {
   "gradient_pct": -9.384043219786577,
   "start_distance_m": 1237.0,
   "end_distance_m": 1337.0,
   "midpoint_distance_m": 1287.0,
   "start_elevation_m": 204.5544029792882,
   "end_elevation_m": 195.17035975950162,
   "start_xy": [
    633381.5895698321,
    4610895.979991802
   ],
   "end_xy": [
    633284.9868252701,
    4610889.986838204
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.65779114463129,
   "start_distance_m": 304.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 305.0,
   "start_elevation_m": 148.24006797538652,
   "end_elevation_m": 148.69322379827915,
   "start_xy": [
    633866.9592454073,
    4611119.141898818
   ],
   "end_xy": [
    633865.6362793829,
    4611120.641819116
   ]
  },
  "max_3m": {
   "gradient_pct": 22.350742737558942,
   "start_distance_m": 302.0,
   "end_distance_m": 305.0,
   "midpoint_distance_m": 303.5,
   "start_elevation_m": 147.7942551682259,
   "end_elevation_m": 148.46477745035267,
   "start_xy": [
    633868.2822114317,
    4611117.641978521
   ],
   "end_xy": [
    633866.297762395,
    4611119.891858967
   ]
  }
 },
 "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": [],
  "suggested_summit_cut_m": 1012.0,
  "trailing_descent_m": 16.1
 },
 "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": "2026-08-24T21:34:23+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-1-260824",
  "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 18.6% over 200 m (Terrain 50), gain 80.5 m over 1467 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). 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": "New Milford",
  "county": "Connecticut"
 }
}