{
 "ocl_version": "0.1.0",
 "name": "Road Number 24",
 "slug": "road-number-24",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 43.888029651905214,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 24.0,
   "end_distance_m": 26.0,
   "start_elevation_m": 123.34146001552574,
   "end_elevation_m": 124.21922060856384,
   "min_gradient_pct": -41.40533386919145
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 43.61246144055713,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 23.0,
   "end_distance_m": 26.0,
   "start_elevation_m": 122.91084676534713,
   "end_elevation_m": 124.21922060856384,
   "min_gradient_pct": -34.738004426927205
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 41.42684614727045,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 22.0,
   "end_distance_m": 27.0,
   "start_elevation_m": 122.46741402991225,
   "end_elevation_m": 124.53875633727577,
   "min_gradient_pct": -29.736570997309286
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 32.977010026225884,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 18.0,
   "end_distance_m": 28.0,
   "start_elevation_m": 121.51009837898313,
   "end_elevation_m": 124.80779938160572,
   "min_gradient_pct": -21.538793376959973
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 29.070791657260884,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 12.0,
   "end_distance_m": 32.0,
   "start_elevation_m": 119.78592551844784,
   "end_elevation_m": 125.60008384990002,
   "min_gradient_pct": -20.771858874042124
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 27.637346260279454,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 12.0,
   "end_distance_m": 37.0,
   "start_elevation_m": 119.78592551844784,
   "end_elevation_m": 126.6952620835177,
   "min_gradient_pct": -16.449199931656153
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 24.266532783543653,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 94.0,
   "end_distance_m": 144.0,
   "start_elevation_m": 129.6372183080456,
   "end_elevation_m": 141.77048469981742,
   "min_gradient_pct": 1.0067587501715138,
   "suppressed_max_gradient_pct": 25.367043897061563,
   "suppressed_location_m": [
    82.0,
    132.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.946118448312774,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 91.0,
   "end_distance_m": 191.0,
   "start_elevation_m": 128.9403721628824,
   "end_elevation_m": 149.88649061119517,
   "min_gradient_pct": 12.118478754189027,
   "suppressed_max_gradient_pct": 22.375727292855245,
   "suppressed_location_m": [
    80.0,
    180.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.335,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 96.0,
  "shape_class": "sustained"
 },
 "length_m": 242.08416106208918,
 "start_elevation_m": 118.62127888183616,
 "end_elevation_m": 159.92271848205598,
 "endpoint_gain_m": 41.30143960021982,
 "overall_gradient_pct": 17.06077730117458,
 "accumulated_ascent_m": 45.96418350110493,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 41.42684614727045,
   "start_distance_m": 22.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 24.5,
   "start_elevation_m": 122.46741402991225,
   "end_elevation_m": 124.53875633727577,
   "start_xy": [
    348551.3377652998,
    4896059.323921959
   ],
   "end_xy": [
    348555.1532871872,
    4896056.871224831
   ]
  },
  "max_10m": {
   "gradient_pct": 32.977010026225884,
   "start_distance_m": 18.0,
   "end_distance_m": 28.0,
   "midpoint_distance_m": 23.0,
   "start_elevation_m": 121.51009837898313,
   "end_elevation_m": 124.80779938160572,
   "start_xy": [
    348547.57495585183,
    4896060.680853312
   ],
   "end_xy": [
    348555.327455211,
    4896055.8865089845
   ]
  },
  "max_20m": {
   "gradient_pct": 29.070791657260884,
   "start_distance_m": 12.0,
   "end_distance_m": 32.0,
   "midpoint_distance_m": 22.0,
   "start_elevation_m": 119.78592551844784,
   "end_elevation_m": 125.60008384990002,
   "start_xy": [
    348541.88486077817,
    4896062.362817658
   ],
   "end_xy": [
    348556.0243815622,
    4896051.947690582
   ]
  },
  "max_25m": {
   "gradient_pct": 27.637346260279454,
   "start_distance_m": 12.0,
   "end_distance_m": 37.0,
   "midpoint_distance_m": 24.5,
   "start_elevation_m": 119.78592551844784,
   "end_elevation_m": 126.6952620835177,
   "start_xy": [
    348541.88486077817,
    4896062.362817658
   ],
   "end_xy": [
    348556.8953046655,
    4896047.024125888
   ]
  },
  "max_50m": {
   "gradient_pct": 24.266532783543653,
   "start_distance_m": 94.0,
   "end_distance_m": 144.0,
   "midpoint_distance_m": 119.0,
   "start_elevation_m": 129.6372183080456,
   "end_elevation_m": 141.77048469981742,
   "start_xy": [
    348555.87957794935,
    4895999.772974243
   ],
   "end_xy": [
    348598.9251441998,
    4895974.335230664
   ]
  },
  "max_100m": {
   "gradient_pct": 20.946118448312774,
   "start_distance_m": 91.0,
   "end_distance_m": 191.0,
   "midpoint_distance_m": 141.0,
   "start_elevation_m": 128.9403721628824,
   "end_elevation_m": 149.88649061119517,
   "start_xy": [
    348553.2968120204,
    4896001.299184513
   ],
   "end_xy": [
    348643.96334559156,
    4895966.041836225
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -29.736570997309286,
   "start_distance_m": 58.0,
   "end_distance_m": 63.0,
   "midpoint_distance_m": 60.5,
   "start_elevation_m": 124.40720933557844,
   "end_elevation_m": 122.92038078571298,
   "start_xy": [
    348547.1591798156,
    4896029.353146162
   ],
   "end_xy": [
    348544.32277368585,
    4896025.260625001
   ]
  },
  "min_10m": {
   "gradient_pct": -21.538793376959973,
   "start_distance_m": 44.0,
   "end_distance_m": 54.0,
   "midpoint_distance_m": 49.0,
   "start_elevation_m": 126.97560990875195,
   "end_elevation_m": 124.82173057105595,
   "start_xy": [
    348555.37080256257,
    4896040.6919830935
   ],
   "end_xy": [
    348549.5050832039,
    4896032.59301262
   ]
  },
  "min_20m": {
   "gradient_pct": -20.771858874042124,
   "start_distance_m": 43.0,
   "end_distance_m": 63.0,
   "midpoint_distance_m": 53.0,
   "start_elevation_m": 127.0747525605214,
   "end_elevation_m": 122.92038078571298,
   "start_xy": [
    348555.9571204399,
    4896041.502064089
   ],
   "end_xy": [
    348544.32277368585,
    4896025.260625001
   ]
  },
  "min_25m": {
   "gradient_pct": -16.449199931656153,
   "start_distance_m": 39.0,
   "end_distance_m": 64.0,
   "midpoint_distance_m": 51.5,
   "start_elevation_m": 127.09343578200563,
   "end_elevation_m": 122.98113579909159,
   "start_xy": [
    348557.2432492733,
    4896045.054624799
   ],
   "end_xy": [
    348544.21473526617,
    4896024.27808314
   ]
  },
  "min_50m": {
   "gradient_pct": 1.0067587501715138,
   "start_distance_m": 33.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 58.0,
   "start_elevation_m": 125.86388266295535,
   "end_elevation_m": 126.3672620380411,
   "start_xy": [
    348556.19833799155,
    4896050.962937232
   ],
   "end_xy": [
    348546.500710492,
    4896005.48657833
   ]
  },
  "min_100m": {
   "gradient_pct": 12.118478754189027,
   "start_distance_m": 2.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 52.0,
   "start_elevation_m": 119.26475665795073,
   "end_elevation_m": 131.38323541213975,
   "start_xy": [
    348535.81771238433,
    4896054.413623304
   ],
   "end_xy": [
    348562.7669630506,
    4895995.703095124
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 43.888029651905214,
   "start_distance_m": 24.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 123.34146001552574,
   "end_elevation_m": 124.21922060856384,
   "start_xy": [
    348553.21927220304,
    4896058.645739345
   ],
   "end_xy": [
    348554.96744728566,
    4896057.853787934
   ]
  },
  "max_3m": {
   "gradient_pct": 43.61246144055713,
   "start_distance_m": 23.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 24.5,
   "start_elevation_m": 122.91084676534713,
   "end_elevation_m": 124.21922060856384,
   "start_xy": [
    348552.278555852,
    4896058.984933581
   ],
   "end_xy": [
    348554.96744728566,
    4896057.853787934
   ]
  }
 },
 "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": 0.21,
   "windows_resited": [
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    40.0,
    90.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "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_x34y490_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-08-25T06:11:05+00:00",
  "road_source": "../ne-docs/me/road-number-24/road-number-24.geojson",
  "run_id": "rebatch-xsection-me-260825",
  "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": [
   "x34y490"
  ],
  "climb_origin": "discovered",
  "notes": "NE box session: masked re-batch, xsection channel-crossing evidence (calibrated vs the NHD-confirmed population, 2026-08-25) + manifest masks where present. ADOPTED (NE wave 1, 2026-08-25): clean-steep,qualified-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'. MASKED RE-BATCH (2026-08-25): culvert-class V-dip masks applied (NHD flowline / xsection channel-crossing evidence, ne-adoption-audits); superseded values in B2 redo trees.",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "mask_ranges_m": [
   [
    45.0,
    85.0
   ]
  ],
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Lovell",
  "county": "Maine"
 }
}