{
 "ocl_version": "0.1.0",
 "name": "Cooper Road",
 "slug": "cooper-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.454559543535368,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 116.0,
   "end_distance_m": 118.0,
   "start_elevation_m": 84.95136800783825,
   "end_elevation_m": 85.38045919870896,
   "min_gradient_pct": 0.3698410850461187
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.25605331667657,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 116.0,
   "end_distance_m": 119.0,
   "start_elevation_m": 84.95136800783825,
   "end_elevation_m": 85.58904960733855,
   "min_gradient_pct": 0.6952202706022111
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.224745361113264,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 113.0,
   "end_distance_m": 118.0,
   "start_elevation_m": 84.3192219306533,
   "end_elevation_m": 85.38045919870896,
   "min_gradient_pct": 0.8382616887917038
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.022154505357236,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 109.0,
   "end_distance_m": 119.0,
   "start_elevation_m": 83.48683415680283,
   "end_elevation_m": 85.58904960733855,
   "min_gradient_pct": 1.3489670870350778
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.764892373984836,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 109.0,
   "end_distance_m": 129.0,
   "start_elevation_m": 83.48683415680283,
   "end_elevation_m": 87.6398126315998,
   "min_gradient_pct": 1.4875225540669845
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.66889678829432,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 108.0,
   "end_distance_m": 133.0,
   "start_elevation_m": 83.28412953968046,
   "end_elevation_m": 88.45135373675404,
   "min_gradient_pct": 1.5810949402286951
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.211867993101976,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 108.0,
   "end_distance_m": 158.0,
   "start_elevation_m": 83.28412953968046,
   "end_elevation_m": 93.39006353623145,
   "min_gradient_pct": 1.705921054923465
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.569121255516563,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 101.0,
   "end_distance_m": 201.0,
   "start_elevation_m": 81.97297542480348,
   "end_elevation_m": 101.54209668032004,
   "min_gradient_pct": 2.71119831303497
  }
 ],
 "shape": {
  "ascent_concentration": 0.32,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 230.0,
  "shape_class": "sustained"
 },
 "length_m": 1415.9999999998595,
 "start_elevation_m": 69.18429982735513,
 "end_elevation_m": 200.8714632339754,
 "endpoint_gain_m": 131.68716340662024,
 "overall_gradient_pct": 9.29994091854755,
 "accumulated_ascent_m": 131.68716340662024,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.224745361113264,
   "start_distance_m": 113.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 115.5,
   "start_elevation_m": 84.3192219306533,
   "end_elevation_m": 85.38045919870896,
   "start_xy": [
    638161.4683537012,
    4593460.00878687
   ],
   "end_xy": [
    638156.9942295227,
    4593462.240873077
   ]
  },
  "max_10m": {
   "gradient_pct": 21.022154505357236,
   "start_distance_m": 109.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 114.0,
   "start_elevation_m": 83.48683415680283,
   "end_elevation_m": 85.58904960733855,
   "start_xy": [
    638165.0474611954,
    4593458.222733304
   ],
   "end_xy": [
    638156.0995929518,
    4593462.687667646
   ]
  },
  "max_20m": {
   "gradient_pct": 20.764892373984836,
   "start_distance_m": 109.0,
   "end_distance_m": 129.0,
   "midpoint_distance_m": 119.0,
   "start_elevation_m": 83.48683415680283,
   "end_elevation_m": 87.6398126315998,
   "start_xy": [
    638165.0474611954,
    4593458.222733304
   ],
   "end_xy": [
    638146.5664877315,
    4593465.652807536
   ]
  },
  "max_25m": {
   "gradient_pct": 20.66889678829432,
   "start_distance_m": 108.0,
   "end_distance_m": 133.0,
   "midpoint_distance_m": 120.5,
   "start_elevation_m": 83.28412953968046,
   "end_elevation_m": 88.45135373675404,
   "start_xy": [
    638165.9420978246,
    4593457.775938852
   ],
   "end_xy": [
    638142.717837164,
    4593466.742708373
   ]
  },
  "max_50m": {
   "gradient_pct": 20.211867993101976,
   "start_distance_m": 108.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 133.0,
   "start_elevation_m": 83.28412953968046,
   "end_elevation_m": 93.39006353623145,
   "start_xy": [
    638165.9420978246,
    4593457.775938852
   ],
   "end_xy": [
    638120.8936773419,
    4593478.378446762
   ]
  },
  "max_100m": {
   "gradient_pct": 19.569121255516563,
   "start_distance_m": 101.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 151.0,
   "start_elevation_m": 81.97297542480348,
   "end_elevation_m": 101.54209668032004,
   "start_xy": [
    638172.2056754677,
    4593454.650626526
   ],
   "end_xy": [
    638091.8761928141,
    4593509.77184394
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.8382616887917038,
   "start_distance_m": 298.0,
   "end_distance_m": 303.0,
   "midpoint_distance_m": 300.5,
   "start_elevation_m": 109.16571696018791,
   "end_elevation_m": 109.20763004462749,
   "start_xy": [
    638026.2248553714,
    4593581.120715832
   ],
   "end_xy": [
    638023.3688101122,
    4593585.224738543
   ]
  },
  "min_10m": {
   "gradient_pct": 1.3489670870350778,
   "start_distance_m": 1406.0,
   "end_distance_m": 1416.0,
   "midpoint_distance_m": 1411.0,
   "start_elevation_m": 200.73656652527188,
   "end_elevation_m": 200.8714632339754,
   "start_xy": [
    638341.4459885638,
    4594565.164641029
   ],
   "end_xy": [
    638349.1161793589,
    4594571.580882853
   ]
  },
  "min_20m": {
   "gradient_pct": 1.4875225540669845,
   "start_distance_m": 293.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 303.0,
   "start_elevation_m": 109.07186222008208,
   "end_elevation_m": 109.36936673089548,
   "start_xy": [
    638029.4624681567,
    4593577.31873048
   ],
   "end_xy": [
    638017.655637239,
    4593593.432029469
   ]
  },
  "min_25m": {
   "gradient_pct": 1.5810949402286951,
   "start_distance_m": 288.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 300.5,
   "start_elevation_m": 108.9740929958383,
   "end_elevation_m": 109.36936673089548,
   "start_xy": [
    638032.8044729632,
    4593573.599725135
   ],
   "end_xy": [
    638017.655637239,
    4593593.432029469
   ]
  },
  "min_50m": {
   "gradient_pct": 1.705921054923465,
   "start_distance_m": 263.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 108.51640620343375,
   "end_elevation_m": 109.36936673089548,
   "start_xy": [
    638049.5149967051,
    4593555.005147378
   ],
   "end_xy": [
    638017.655637239,
    4593593.432029469
   ]
  },
  "min_100m": {
   "gradient_pct": 2.71119831303497,
   "start_distance_m": 248.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 298.0,
   "start_elevation_m": 107.98689650141955,
   "end_elevation_m": 110.69809481445452,
   "start_xy": [
    638059.5410111225,
    4593543.848131341
   ],
   "end_xy": [
    637999.1699841992,
    4593623.024352543
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.454559543535368,
   "start_distance_m": 116.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 117.0,
   "start_elevation_m": 84.95136800783825,
   "end_elevation_m": 85.38045919870896,
   "start_xy": [
    638158.7838829327,
    4593461.348046178
   ],
   "end_xy": [
    638156.9942295227,
    4593462.240873077
   ]
  },
  "max_3m": {
   "gradient_pct": 21.25605331667657,
   "start_distance_m": 116.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 117.5,
   "start_elevation_m": 84.95136800783825,
   "end_elevation_m": 85.58904960733855,
   "start_xy": [
    638158.7838829327,
    4593461.348046178
   ],
   "end_xy": [
    638156.0995929518,
    4593462.687667646
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.192,
   "obstruction_max_height_m": 28.25,
   "flagged_windows_m": [
    3,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_x63y460_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-09-03T22:40:11+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": [
   "x63y460"
  ],
  "route_cut_m": 1416.0,
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/CT_Statewide_B3_2016",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.996,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Bridgewater",
  "county": "Connecticut"
 }
}