{
 "ocl_version": "0.1.0",
 "name": "Lambert Road",
 "slug": "lambert-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 45.249086214568024,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1494.0,
   "end_distance_m": 1496.0,
   "start_elevation_m": 299.79063436797446,
   "end_elevation_m": 300.6956160922658,
   "min_gradient_pct": -56.28216004133435,
   "suppressed_max_gradient_pct": 78.88860612479789,
   "suppressed_location_m": [
    2417.0,
    2419.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 41.49043408709758,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1493.0,
   "end_distance_m": 1496.0,
   "start_elevation_m": 299.4509030696529,
   "end_elevation_m": 300.6956160922658,
   "min_gradient_pct": -54.05759046534134,
   "suppressed_max_gradient_pct": 71.92560872136937,
   "suppressed_location_m": [
    2417.0,
    2420.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 39.25736446201881,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1492.0,
   "end_distance_m": 1497.0,
   "start_elevation_m": 299.0705081625979,
   "end_elevation_m": 301.03337638569883,
   "min_gradient_pct": -47.274739719879335,
   "suppressed_max_gradient_pct": 53.36676844225735,
   "suppressed_location_m": [
    2416.0,
    2421.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 36.48682586278994,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1206.0,
   "end_distance_m": 1216.0,
   "start_elevation_m": 266.79819929549035,
   "end_elevation_m": 270.44688188176934,
   "min_gradient_pct": -34.85576474668051,
   "suppressed_max_gradient_pct": 36.53780768464458,
   "suppressed_location_m": [
    2416.0,
    2426.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 33.73223103706948,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1202.0,
   "end_distance_m": 1222.0,
   "start_elevation_m": 265.5838337037395,
   "end_elevation_m": 272.3302799111534,
   "min_gradient_pct": -31.2057623343955
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 31.96894721908552,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1200.0,
   "end_distance_m": 1225.0,
   "start_elevation_m": 265.0732963011941,
   "end_elevation_m": 273.06553310596547,
   "min_gradient_pct": -25.294371042307148
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 24.79856681898059,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1180.0,
   "end_distance_m": 1230.0,
   "start_elevation_m": 261.40377494815334,
   "end_elevation_m": 273.80305835764364,
   "min_gradient_pct": -16.040397514329243
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.55270664252089,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1129.0,
   "end_distance_m": 1229.0,
   "start_elevation_m": 256.1491367829627,
   "end_elevation_m": 273.7018434254836,
   "min_gradient_pct": -9.27914816635382
  }
 ],
 "shape": {
  "ascent_concentration": 0.42,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 89.0,
  "shape_class": "sustained"
 },
 "length_m": 3259.999999999796,
 "start_elevation_m": 169.9138540397721,
 "end_elevation_m": 360.20725358626856,
 "endpoint_gain_m": 190.29339954649646,
 "overall_gradient_pct": 5.83722084498492,
 "accumulated_ascent_m": 220.9129947965193,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 39.25736446201881,
   "start_distance_m": 1492.0,
   "end_distance_m": 1497.0,
   "midpoint_distance_m": 1494.5,
   "start_elevation_m": 299.0705081625979,
   "end_elevation_m": 301.03337638569883,
   "start_xy": [
    626095.0309947511,
    4631877.762717954
   ],
   "end_xy": [
    626090.7497577388,
    4631875.179889141
   ]
  },
  "max_10m": {
   "gradient_pct": 36.48682586278994,
   "start_distance_m": 1206.0,
   "end_distance_m": 1216.0,
   "midpoint_distance_m": 1211.0,
   "start_elevation_m": 266.79819929549035,
   "end_elevation_m": 270.44688188176934,
   "start_xy": [
    626010.5849546418,
    4632122.241847722
   ],
   "end_xy": [
    626013.9568247487,
    4632112.827472067
   ]
  },
  "max_20m": {
   "gradient_pct": 33.73223103706948,
   "start_distance_m": 1202.0,
   "end_distance_m": 1222.0,
   "midpoint_distance_m": 1212.0,
   "start_elevation_m": 265.5838337037395,
   "end_elevation_m": 272.3302799111534,
   "start_xy": [
    626009.2358282028,
    4632126.007462412
   ],
   "end_xy": [
    626015.9799541248,
    4632107.178849164
   ]
  },
  "max_25m": {
   "gradient_pct": 31.96894721908552,
   "start_distance_m": 1200.0,
   "end_distance_m": 1225.0,
   "midpoint_distance_m": 1212.5,
   "start_elevation_m": 265.0732963011941,
   "end_elevation_m": 273.06553310596547,
   "start_xy": [
    626008.5615934234,
    4632127.89038756
   ],
   "end_xy": [
    626016.9917721109,
    4632104.354628531
   ]
  },
  "max_50m": {
   "gradient_pct": 24.79856681898059,
   "start_distance_m": 1180.0,
   "end_distance_m": 1230.0,
   "midpoint_distance_m": 1205.0,
   "start_elevation_m": 261.40377494815334,
   "end_elevation_m": 273.80305835764364,
   "start_xy": [
    626001.8169643902,
    4632146.718820501
   ],
   "end_xy": [
    626015.9992799928,
    4632100.30655927
   ]
  },
  "max_100m": {
   "gradient_pct": 17.55270664252089,
   "start_distance_m": 1129.0,
   "end_distance_m": 1229.0,
   "midpoint_distance_m": 1179.0,
   "start_elevation_m": 256.1491367829627,
   "end_elevation_m": 273.7018434254836,
   "start_xy": [
    625977.306429828,
    4632177.879847665
   ],
   "end_xy": [
    626016.8271537517,
    4632100.867473737
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -47.274739719879335,
   "start_distance_m": 1241.0,
   "end_distance_m": 1246.0,
   "midpoint_distance_m": 1243.5,
   "start_elevation_m": 273.5025094618163,
   "end_elevation_m": 271.13877247582235,
   "start_xy": [
    626006.8940779266,
    4632094.134422363
   ],
   "end_xy": [
    626002.7550238875,
    4632091.32938575
   ]
  },
  "min_10m": {
   "gradient_pct": -34.85576474668051,
   "start_distance_m": 2541.0,
   "end_distance_m": 2551.0,
   "midpoint_distance_m": 2546.0,
   "start_elevation_m": 327.0807145803101,
   "end_elevation_m": 323.59513810564204,
   "start_xy": [
    626239.123023196,
    4630956.4705054555
   ],
   "end_xy": [
    626248.1278505956,
    4630952.121588878
   ]
  },
  "min_20m": {
   "gradient_pct": -31.2057623343955,
   "start_distance_m": 2536.0,
   "end_distance_m": 2556.0,
   "midpoint_distance_m": 2546.0,
   "start_elevation_m": 328.4862820582867,
   "end_elevation_m": 322.2451295914076,
   "start_xy": [
    626239.3336739058,
    4630961.0570955435
   ],
   "end_xy": [
    626252.629973933,
    4630949.9465292655
   ]
  },
  "min_25m": {
   "gradient_pct": -25.294371042307148,
   "start_distance_m": 2535.0,
   "end_distance_m": 2560.0,
   "midpoint_distance_m": 2547.5,
   "start_elevation_m": 328.5423380158047,
   "end_elevation_m": 322.21874525522793,
   "start_xy": [
    626239.5984834188,
    4630962.021396286
   ],
   "end_xy": [
    626255.9863870812,
    4630947.977156304
   ]
  },
  "min_50m": {
   "gradient_pct": -16.040397514329243,
   "start_distance_m": 2507.0,
   "end_distance_m": 2557.0,
   "midpoint_distance_m": 2532.0,
   "start_elevation_m": 330.2395580559865,
   "end_elevation_m": 322.21935929882187,
   "start_xy": [
    626247.020586901,
    4630989.019772727
   ],
   "end_xy": [
    626253.5303483794,
    4630949.51141338
   ]
  },
  "min_100m": {
   "gradient_pct": -9.27914816635382,
   "start_distance_m": 2508.0,
   "end_distance_m": 2608.0,
   "midpoint_distance_m": 2558.0,
   "start_elevation_m": 330.25890938253906,
   "end_elevation_m": 320.97976121618524,
   "start_xy": [
    626246.7555234109,
    4630988.055541766
   ],
   "end_xy": [
    626238.2167400044,
    4630903.41028091
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 45.249086214568024,
   "start_distance_m": 1494.0,
   "end_distance_m": 1496.0,
   "midpoint_distance_m": 1495.0,
   "start_elevation_m": 299.79063436797446,
   "end_elevation_m": 300.6956160922658,
   "start_xy": [
    626093.3183906174,
    4631876.729767464
   ],
   "end_xy": [
    626091.6059697897,
    4631875.696513296
   ]
  },
  "max_3m": {
   "gradient_pct": 41.49043408709758,
   "start_distance_m": 1493.0,
   "end_distance_m": 1496.0,
   "midpoint_distance_m": 1494.5,
   "start_elevation_m": 299.4509030696529,
   "end_elevation_m": 300.6956160922658,
   "start_xy": [
    626094.174683527,
    4631877.246257827
   ],
   "end_xy": [
    626091.6059697897,
    4631875.696513296
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.002,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    2415.0,
    2421.0
   ]
  ],
  "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_x62y463_CT_Statewide_C16.tif",
   "data/cache/usa/ct/USGS_1M_18_x62y464_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-09-03T22:40:48+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": "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, CT_Statewide_C16 (collected 2016)",
  "elevation_tile_ids": [
   "x62y463",
   "x62y464"
  ],
  "route_cut_m": 3260.0,
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: USGS_LPC_CT_Sandy_2014_LAS_2015: no corridor points fetched",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Sharon",
  "county": "Connecticut"
 }
}