{
 "ocl_version": "0.1.0",
 "name": "Hodge Hill Drive",
 "slug": "hodge-hill-drive",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 52.82634637081998,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 653.0,
   "end_distance_m": 655.0,
   "start_elevation_m": 130.00713766007178,
   "end_elevation_m": 131.06366458748818,
   "min_gradient_pct": -68.84430390771428,
   "suppressed_max_gradient_pct": 81.7825997820421,
   "suppressed_location_m": [
    138.0,
    140.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 50.168517750048146,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 652.0,
   "end_distance_m": 655.0,
   "start_elevation_m": 129.55860905498673,
   "end_elevation_m": 131.06366458748818,
   "min_gradient_pct": -64.84547289943994,
   "suppressed_max_gradient_pct": 73.37481220801578,
   "suppressed_location_m": [
    137.0,
    140.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 44.17582271899562,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 652.0,
   "end_distance_m": 657.0,
   "start_elevation_m": 129.55860905498673,
   "end_elevation_m": 131.7674001909365,
   "min_gradient_pct": -50.97887959016305,
   "suppressed_max_gradient_pct": 62.52212700727455,
   "suppressed_location_m": [
    137.0,
    142.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 42.58726526491216,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 653.0,
   "end_distance_m": 663.0,
   "start_elevation_m": 130.00713766007178,
   "end_elevation_m": 134.265864186563,
   "min_gradient_pct": -39.179646134608106,
   "suppressed_max_gradient_pct": 51.581184035050285,
   "suppressed_location_m": [
    135.0,
    145.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 37.83074138757769,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 652.0,
   "end_distance_m": 672.0,
   "start_elevation_m": 129.55860905498673,
   "end_elevation_m": 137.12475733250227,
   "min_gradient_pct": -30.90358596843089
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 36.90126953852473,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 652.0,
   "end_distance_m": 677.0,
   "start_elevation_m": 129.55860905498673,
   "end_elevation_m": 138.78392643961791,
   "min_gradient_pct": -26.62168379267075
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.10779734469432,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 631.0,
   "end_distance_m": 681.0,
   "start_elevation_m": 127.07833757201344,
   "end_elevation_m": 139.6322362443606,
   "min_gradient_pct": -22.962492620665813
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.495921222242004,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 615.0,
   "end_distance_m": 715.0,
   "start_elevation_m": 124.030368100488,
   "end_elevation_m": 143.52628932273,
   "min_gradient_pct": -13.654810399603079
  }
 ],
 "shape": {
  "ascent_concentration": 0.491,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 69.0,
  "shape_class": "stepped"
 },
 "length_m": 833.3106019161487,
 "start_elevation_m": 129.48675357383462,
 "end_elevation_m": 160.94272855940412,
 "endpoint_gain_m": 31.455974985569497,
 "overall_gradient_pct": 3.774819966677291,
 "accumulated_ascent_m": 72.66297829743391,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 44.17582271899562,
   "start_distance_m": 652.0,
   "end_distance_m": 657.0,
   "midpoint_distance_m": 654.5,
   "start_elevation_m": 129.55860905498673,
   "end_elevation_m": 131.7674001909365,
   "start_xy": [
    393947.9391160372,
    4919772.798895627
   ],
   "end_xy": [
    393947.85768438224,
    4919767.799558783
   ]
  },
  "max_10m": {
   "gradient_pct": 42.58726526491216,
   "start_distance_m": 653.0,
   "end_distance_m": 663.0,
   "midpoint_distance_m": 658.0,
   "start_elevation_m": 130.00713766007178,
   "end_elevation_m": 134.265864186563,
   "start_xy": [
    393947.9228297062,
    4919771.799028259
   ],
   "end_xy": [
    393949.619362903,
    4919762.268877152
   ]
  },
  "max_20m": {
   "gradient_pct": 37.83074138757769,
   "start_distance_m": 652.0,
   "end_distance_m": 672.0,
   "midpoint_distance_m": 662.0,
   "start_elevation_m": 129.55860905498673,
   "end_elevation_m": 137.12475733250227,
   "start_xy": [
    393947.9391160372,
    4919772.798895627
   ],
   "end_xy": [
    393954.012655359,
    4919754.414007236
   ]
  },
  "max_25m": {
   "gradient_pct": 36.90126953852473,
   "start_distance_m": 652.0,
   "end_distance_m": 677.0,
   "midpoint_distance_m": 664.5,
   "start_elevation_m": 129.55860905498673,
   "end_elevation_m": 138.78392643961791,
   "start_xy": [
    393947.9391160372,
    4919772.798895627
   ],
   "end_xy": [
    393956.45337339013,
    4919750.050190616
   ]
  },
  "max_50m": {
   "gradient_pct": 25.10779734469432,
   "start_distance_m": 631.0,
   "end_distance_m": 681.0,
   "midpoint_distance_m": 656.0,
   "start_elevation_m": 127.07833757201344,
   "end_elevation_m": 139.6322362443606,
   "start_xy": [
    393948.28112898814,
    4919793.796110375
   ],
   "end_xy": [
    393958.40594781504,
    4919746.559137321
   ]
  },
  "max_100m": {
   "gradient_pct": 19.495921222242004,
   "start_distance_m": 615.0,
   "end_distance_m": 715.0,
   "midpoint_distance_m": 665.0,
   "start_elevation_m": 124.030368100488,
   "end_elevation_m": 143.52628932273,
   "start_xy": [
    393948.5417102841,
    4919809.793988277
   ],
   "end_xy": [
    393971.8151611957,
    4919716.013478293
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -50.97887959016305,
   "start_distance_m": 504.0,
   "end_distance_m": 509.0,
   "midpoint_distance_m": 506.5,
   "start_elevation_m": 128.44153181226272,
   "end_elevation_m": 125.89258783275457,
   "start_xy": [
    393907.15436757286,
    4919903.681207304
   ],
   "end_xy": [
    393912.04132293415,
    4919902.624009452
   ]
  },
  "min_10m": {
   "gradient_pct": -39.179646134608106,
   "start_distance_m": 172.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 136.95792503586085,
   "end_elevation_m": 133.03996042240004,
   "start_xy": [
    393615.1991671007,
    4919979.659549929
   ],
   "end_xy": [
    393624.16263911297,
    4919983.923681322
   ]
  },
  "min_20m": {
   "gradient_pct": -30.90358596843089,
   "start_distance_m": 170.0,
   "end_distance_m": 190.0,
   "midpoint_distance_m": 180.0,
   "start_elevation_m": 137.38404040530648,
   "end_elevation_m": 131.2033232116203,
   "start_xy": [
    393613.5286662929,
    4919978.559810391
   ],
   "end_xy": [
    393631.71294849535,
    4919986.568076948
   ]
  },
  "min_25m": {
   "gradient_pct": -26.62168379267075,
   "start_distance_m": 170.0,
   "end_distance_m": 195.0,
   "midpoint_distance_m": 182.5,
   "start_elevation_m": 137.38404040530648,
   "end_elevation_m": 130.7286194571388,
   "start_xy": [
    393613.5286662929,
    4919978.559810391
   ],
   "end_xy": [
    393636.43189185933,
    4919988.220824215
   ]
  },
  "min_50m": {
   "gradient_pct": -22.962492620665813,
   "start_distance_m": 462.0,
   "end_distance_m": 512.0,
   "midpoint_distance_m": 487.0,
   "start_elevation_m": 136.74609659845206,
   "end_elevation_m": 125.26485028811915,
   "start_xy": [
    393865.9247523247,
    4919911.605297268
   ],
   "end_xy": [
    393914.9734961509,
    4919901.9896907415
   ]
  },
  "min_100m": {
   "gradient_pct": -13.654810399603079,
   "start_distance_m": 452.0,
   "end_distance_m": 552.0,
   "midpoint_distance_m": 502.0,
   "start_elevation_m": 137.49395158218343,
   "end_elevation_m": 123.83914118258035,
   "start_xy": [
    393856.0483496043,
    4919913.172673835
   ],
   "end_xy": [
    393940.70774459577,
    4919871.8634233745
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 52.82634637081998,
   "start_distance_m": 653.0,
   "end_distance_m": 655.0,
   "midpoint_distance_m": 654.0,
   "start_elevation_m": 130.00713766007178,
   "end_elevation_m": 131.06366458748818,
   "start_xy": [
    393947.9228297062,
    4919771.799028259
   ],
   "end_xy": [
    393947.89025704423,
    4919769.799293521
   ]
  },
  "max_3m": {
   "gradient_pct": 50.168517750048146,
   "start_distance_m": 652.0,
   "end_distance_m": 655.0,
   "midpoint_distance_m": 653.5,
   "start_elevation_m": 129.55860905498673,
   "end_elevation_m": 131.06366458748818,
   "start_xy": [
    393947.9391160372,
    4919772.798895627
   ],
   "end_xy": [
    393947.89025704423,
    4919769.799293521
   ]
  }
 },
 "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": 0.031,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    136.0,
    142.0
   ],
   [
    177.0,
    182.0
   ],
   [
    231.0,
    237.0
   ],
   [
    503.0,
    508.0
   ]
  ],
  "review": [
   "max10_over_40"
  ],
  "extent": [
   "may_start_earlier",
   "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/me/USGS_1M_19_x39y492_ME_WesternMtns_B24.tif",
   "data/cache/usa/me/USGS_1M_19_x39y493_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-08-24T20:38:48+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/maine-2026-08-22.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-me-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, ME_WesternMtns_B24 (collected 2024)",
  "elevation_tile_ids": [
   "x39y492",
   "x39y493"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 16.1% over 200 m (Terrain 50), gain 30.0 m over 833 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": "Hartford",
  "county": "Maine"
 }
}