{
 "ocl_version": "0.1.0",
 "name": "Nelson Drive",
 "slug": "nelson-drive",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.348343107479195,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1268.0,
   "end_distance_m": 1270.0,
   "start_elevation_m": 198.43828646618505,
   "end_elevation_m": 199.36525332833463,
   "min_gradient_pct": -16.20306454393159
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 44.28532140402316,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1268.0,
   "end_distance_m": 1271.0,
   "start_elevation_m": 198.43828646618505,
   "end_elevation_m": 199.76684610830574,
   "min_gradient_pct": -14.49546861263021
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 41.72284564193376,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1268.0,
   "end_distance_m": 1273.0,
   "start_elevation_m": 198.43828646618505,
   "end_elevation_m": 200.52442874828174,
   "min_gradient_pct": -12.874704470954725
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 34.49173688966994,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1264.0,
   "end_distance_m": 1274.0,
   "start_elevation_m": 197.3222826686099,
   "end_elevation_m": 200.77145635757688,
   "min_gradient_pct": -9.293701466280595
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.66071242097908,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1437.0,
   "end_distance_m": 1457.0,
   "start_elevation_m": 216.99941863913406,
   "end_elevation_m": 222.53156112332988,
   "min_gradient_pct": -8.236081515327811
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.039157280155905,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1434.0,
   "end_distance_m": 1459.0,
   "start_elevation_m": 216.41852187409398,
   "end_elevation_m": 222.92831119413296,
   "min_gradient_pct": -8.218649449117493
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.24467892228563,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1410.0,
   "end_distance_m": 1460.0,
   "start_elevation_m": 212.46343019068325,
   "end_elevation_m": 223.08576965182607,
   "min_gradient_pct": -7.311657510947839
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.242821230157434,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1376.0,
   "end_distance_m": 1476.0,
   "start_elevation_m": 210.42859537891664,
   "end_elevation_m": 223.67141660907407,
   "min_gradient_pct": -5.625987017710685,
   "suppressed_max_gradient_pct": 15.971302416678498,
   "suppressed_location_m": [
    1408.0,
    1508.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.373,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 101.0,
  "shape_class": "sustained"
 },
 "length_m": 1632.279126367302,
 "start_elevation_m": 119.9651842718266,
 "end_elevation_m": 240.89240983766757,
 "endpoint_gain_m": 120.92722556584097,
 "overall_gradient_pct": 7.408489370011672,
 "accumulated_ascent_m": 130.83936590291245,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 41.72284564193376,
   "start_distance_m": 1268.0,
   "end_distance_m": 1273.0,
   "midpoint_distance_m": 1270.5,
   "start_elevation_m": 198.43828646618505,
   "end_elevation_m": 200.52442874828174,
   "start_xy": [
    673651.4704102081,
    4625282.821889499
   ],
   "end_xy": [
    673646.7488720822,
    4625284.429158419
   ]
  },
  "max_10m": {
   "gradient_pct": 34.49173688966994,
   "start_distance_m": 1264.0,
   "end_distance_m": 1274.0,
   "midpoint_distance_m": 1269.0,
   "start_elevation_m": 197.3222826686099,
   "end_elevation_m": 200.77145635757688,
   "start_xy": [
    673655.3930069143,
    4625282.038798617
   ],
   "end_xy": [
    673645.8196778478,
    4625284.798750134
   ]
  },
  "max_20m": {
   "gradient_pct": 27.66071242097908,
   "start_distance_m": 1437.0,
   "end_distance_m": 1457.0,
   "midpoint_distance_m": 1447.0,
   "start_elevation_m": 216.99941863913406,
   "end_elevation_m": 222.53156112332988,
   "start_xy": [
    673503.2354472411,
    4625257.327070345
   ],
   "end_xy": [
    673491.2367292147,
    4625273.328031099
   ]
  },
  "max_25m": {
   "gradient_pct": 26.039157280155905,
   "start_distance_m": 1434.0,
   "end_distance_m": 1459.0,
   "midpoint_distance_m": 1446.5,
   "start_elevation_m": 216.41852187409398,
   "end_elevation_m": 222.92831119413296,
   "start_xy": [
    673505.0354472412,
    4625254.927070345
   ],
   "end_xy": [
    673490.0372077333,
    4625274.928389689
   ]
  },
  "max_50m": {
   "gradient_pct": 21.24467892228563,
   "start_distance_m": 1410.0,
   "end_distance_m": 1460.0,
   "midpoint_distance_m": 1435.0,
   "start_elevation_m": 212.46343019068325,
   "end_elevation_m": 223.08576965182607,
   "start_xy": [
    673525.2917392201,
    4625243.892613782
   ],
   "end_xy": [
    673489.4372077333,
    4625275.728389689
   ]
  },
  "max_100m": {
   "gradient_pct": 13.242821230157434,
   "start_distance_m": 1376.0,
   "end_distance_m": 1476.0,
   "midpoint_distance_m": 1426.0,
   "start_elevation_m": 210.42859537891664,
   "end_elevation_m": 223.67141660907407,
   "start_xy": [
    673558.1090677837,
    4625241.335585123
   ],
   "end_xy": [
    673485.1358416285,
    4625290.777546784
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.874704470954725,
   "start_distance_m": 259.0,
   "end_distance_m": 264.0,
   "midpoint_distance_m": 261.5,
   "start_elevation_m": 135.71909180269196,
   "end_elevation_m": 135.07535657914423,
   "start_xy": [
    673968.4362953567,
    4624424.373312501
   ],
   "end_xy": [
    673965.201226898,
    4624428.139106107
   ]
  },
  "min_10m": {
   "gradient_pct": -9.293701466280595,
   "start_distance_m": 258.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 263.0,
   "start_elevation_m": 135.77226197553307,
   "end_elevation_m": 134.842891828905,
   "start_xy": [
    673968.9207555836,
    4624423.498499216
   ],
   "end_xy": [
    673962.3311258876,
    4624430.925236062
   ]
  },
  "min_20m": {
   "gradient_pct": -8.236081515327811,
   "start_distance_m": 253.0,
   "end_distance_m": 273.0,
   "midpoint_distance_m": 263.0,
   "start_elevation_m": 136.06437958562316,
   "end_elevation_m": 134.4171632825576,
   "start_xy": [
    673971.3443774001,
    4624419.125164484
   ],
   "end_xy": [
    673958.7439731554,
    4624434.408384534
   ]
  },
  "min_25m": {
   "gradient_pct": -8.218649449117493,
   "start_distance_m": 259.0,
   "end_distance_m": 284.0,
   "midpoint_distance_m": 271.5,
   "start_elevation_m": 135.71909180269196,
   "end_elevation_m": 133.6644294404126,
   "start_xy": [
    673968.4362953567,
    4624424.373312501
   ],
   "end_xy": [
    673950.1479247471,
    4624441.220584201
   ]
  },
  "min_50m": {
   "gradient_pct": -7.311657510947839,
   "start_distance_m": 234.0,
   "end_distance_m": 284.0,
   "midpoint_distance_m": 259.0,
   "start_elevation_m": 137.3202581958865,
   "end_elevation_m": 133.6644294404126,
   "start_xy": [
    673976.2487766787,
    4624401.070923916
   ],
   "end_xy": [
    673950.1479247471,
    4624441.220584201
   ]
  },
  "min_100m": {
   "gradient_pct": -5.625987017710685,
   "start_distance_m": 221.0,
   "end_distance_m": 321.0,
   "midpoint_distance_m": 271.0,
   "start_elevation_m": 137.90564501490337,
   "end_elevation_m": 132.2796579971927,
   "start_xy": [
    673976.2650531868,
    4624388.071864455
   ],
   "end_xy": [
    673919.7838892053,
    4624462.363550869
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.348343107479195,
   "start_distance_m": 1268.0,
   "end_distance_m": 1270.0,
   "midpoint_distance_m": 1269.0,
   "start_elevation_m": 198.43828646618505,
   "end_elevation_m": 199.36525332833463,
   "start_xy": [
    673651.4704102081,
    4625282.821889499
   ],
   "end_xy": [
    673649.5366610313,
    4625283.320902496
   ]
  },
  "max_3m": {
   "gradient_pct": 44.28532140402316,
   "start_distance_m": 1268.0,
   "end_distance_m": 1271.0,
   "midpoint_distance_m": 1269.5,
   "start_elevation_m": 198.43828646618505,
   "end_elevation_m": 199.76684610830574,
   "start_xy": [
    673651.4704102081,
    4625282.821889499
   ],
   "end_xy": [
    673648.607583576,
    4625283.690787579
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.062,
   "windows_resited": [
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.201,
   "obstruction_max_height_m": 29.17,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    1480.0,
    1550.0
   ],
   [
    1580.0,
    1610.0
   ]
  ],
  "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/ct/USGS_1M_18_x67y463_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-09-03T19:23:07+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/nelson-drive/nelson-drive.geojson",
  "run_id": "canopy-all-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": [
   "x67y463"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/CT_Statewide_B5_2016",
   "ept_crs": "EPSG:3857",
   "station_coverage": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Burlington",
  "county": "Connecticut"
 }
}