{
 "ocl_version": "0.1.0",
 "name": "Elm Mountain Road",
 "slug": "elm-mountain-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.13836511878162,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 808.0,
   "end_distance_m": 810.0,
   "start_elevation_m": 543.8429417271271,
   "end_elevation_m": 544.7657090295028,
   "min_gradient_pct": -16.34343543958323
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 41.209869263093424,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 596.0,
   "end_distance_m": 599.0,
   "start_elevation_m": 512.4926021568251,
   "end_elevation_m": 513.7288982347179,
   "min_gradient_pct": -13.801649496584409
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 39.67030859985243,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 597.0,
   "end_distance_m": 602.0,
   "start_elevation_m": 512.8522252781971,
   "end_elevation_m": 514.8357407081897,
   "min_gradient_pct": -10.261243673518265
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 36.11363027432503,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 593.0,
   "end_distance_m": 603.0,
   "start_elevation_m": 511.6199356531413,
   "end_elevation_m": 515.2312986805738,
   "min_gradient_pct": -5.753526540032681
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 34.86131193026779,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 583.0,
   "end_distance_m": 603.0,
   "start_elevation_m": 508.25903629452023,
   "end_elevation_m": 515.2312986805738,
   "min_gradient_pct": -3.085404964292593
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 34.6530676074201,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 578.0,
   "end_distance_m": 603.0,
   "start_elevation_m": 506.56803177871876,
   "end_elevation_m": 515.2312986805738,
   "min_gradient_pct": -2.5661634315551964
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 28.502888231370434,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 569.0,
   "end_distance_m": 619.0,
   "start_elevation_m": 504.6776447388985,
   "end_elevation_m": 518.9290888545837,
   "min_gradient_pct": 0.7138804408201622
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.400623183977586,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 558.0,
   "end_distance_m": 658.0,
   "start_elevation_m": 503.3094628553681,
   "end_elevation_m": 522.7100860393457,
   "min_gradient_pct": 2.5947616721487634,
   "suppressed_max_gradient_pct": 22.04117343712312,
   "suppressed_location_m": [
    531.0,
    631.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.411,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 81.0,
  "shape_class": "sustained"
 },
 "length_m": 1072.1315956777403,
 "start_elevation_m": 469.695811242697,
 "end_elevation_m": 576.0698614953603,
 "endpoint_gain_m": 106.37405025266332,
 "overall_gradient_pct": 9.921734484974275,
 "accumulated_ascent_m": 107.6844644455166,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 39.67030859985243,
   "start_distance_m": 597.0,
   "end_distance_m": 602.0,
   "midpoint_distance_m": 599.5,
   "start_elevation_m": 512.8522252781971,
   "end_elevation_m": 514.8357407081897,
   "start_xy": [
    435268.32028187055,
    5097055.134245116
   ],
   "end_xy": [
    435263.72006883594,
    5097057.093335887
   ]
  },
  "max_10m": {
   "gradient_pct": 36.11363027432503,
   "start_distance_m": 593.0,
   "end_distance_m": 603.0,
   "midpoint_distance_m": 598.0,
   "start_elevation_m": 511.6199356531413,
   "end_elevation_m": 515.2312986805738,
   "start_xy": [
    435272.0005243434,
    5097053.567141801
   ],
   "end_xy": [
    435262.82770707255,
    5097057.521155653
   ]
  },
  "max_20m": {
   "gradient_pct": 34.86131193026779,
   "start_distance_m": 583.0,
   "end_distance_m": 603.0,
   "midpoint_distance_m": 593.0,
   "start_elevation_m": 508.25903629452023,
   "end_elevation_m": 515.2312986805738,
   "start_xy": [
    435281.2009182734,
    5097049.648884734
   ],
   "end_xy": [
    435262.82770707255,
    5097057.521155653
   ]
  },
  "max_25m": {
   "gradient_pct": 34.6530676074201,
   "start_distance_m": 578.0,
   "end_distance_m": 603.0,
   "midpoint_distance_m": 590.5,
   "start_elevation_m": 506.56803177871876,
   "end_elevation_m": 515.2312986805738,
   "start_xy": [
    435285.8008032197,
    5097047.689022976
   ],
   "end_xy": [
    435262.82770707255,
    5097057.521155653
   ]
  },
  "max_50m": {
   "gradient_pct": 28.502888231370434,
   "start_distance_m": 569.0,
   "end_distance_m": 619.0,
   "midpoint_distance_m": 594.0,
   "start_elevation_m": 504.6776447388985,
   "end_elevation_m": 518.9290888545837,
   "start_xy": [
    435294.0814119795,
    5097044.1631896775
   ],
   "end_xy": [
    435253.322839043,
    5097070.39159624
   ]
  },
  "max_100m": {
   "gradient_pct": 19.400623183977586,
   "start_distance_m": 558.0,
   "end_distance_m": 658.0,
   "midpoint_distance_m": 608.0,
   "start_elevation_m": 503.3094628553681,
   "end_elevation_m": 522.7100860393457,
   "start_xy": [
    435303.42492090934,
    5097038.361529016
   ],
   "end_xy": [
    435229.1493074676,
    5097100.755367601
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.261243673518265,
   "start_distance_m": 525.0,
   "end_distance_m": 530.0,
   "midpoint_distance_m": 527.5,
   "start_elevation_m": 499.3265866968689,
   "end_elevation_m": 498.813524513193,
   "start_xy": [
    435319.71401273744,
    5097012.103881966
   ],
   "end_xy": [
    435318.3870427958,
    5097016.9245817475
   ]
  },
  "min_10m": {
   "gradient_pct": -5.753526540032681,
   "start_distance_m": 520.0,
   "end_distance_m": 530.0,
   "midpoint_distance_m": 525.0,
   "start_elevation_m": 499.38887716719626,
   "end_elevation_m": 498.813524513193,
   "start_xy": [
    435319.61511205276,
    5097007.2569034165
   ],
   "end_xy": [
    435318.3870427958,
    5097016.9245817475
   ]
  },
  "min_20m": {
   "gradient_pct": -3.085404964292593,
   "start_distance_m": 510.0,
   "end_distance_m": 530.0,
   "midpoint_distance_m": 520.0,
   "start_elevation_m": 499.4306055060515,
   "end_elevation_m": 498.813524513193,
   "start_xy": [
    435316.9240863489,
    5096997.625788677
   ],
   "end_xy": [
    435318.3870427958,
    5097016.9245817475
   ]
  },
  "min_25m": {
   "gradient_pct": -2.5661634315551964,
   "start_distance_m": 505.0,
   "end_distance_m": 530.0,
   "midpoint_distance_m": 517.5,
   "start_elevation_m": 499.4550653710818,
   "end_elevation_m": 498.813524513193,
   "start_xy": [
    435315.57797724253,
    5096992.810398084
   ],
   "end_xy": [
    435318.3870427958,
    5097016.9245817475
   ]
  },
  "min_50m": {
   "gradient_pct": 0.7138804408201622,
   "start_distance_m": 480.0,
   "end_distance_m": 530.0,
   "midpoint_distance_m": 505.0,
   "start_elevation_m": 498.4565842927829,
   "end_elevation_m": 498.813524513193,
   "start_xy": [
    435308.85006407957,
    5096968.732708954
   ],
   "end_xy": [
    435318.3870427958,
    5097016.9245817475
   ]
  },
  "min_100m": {
   "gradient_pct": 2.5947616721487634,
   "start_distance_m": 282.0,
   "end_distance_m": 382.0,
   "midpoint_distance_m": 332.0,
   "start_elevation_m": 491.0917592712444,
   "end_elevation_m": 493.6865209433932,
   "start_xy": [
    435252.94773298805,
    5096779.070626022
   ],
   "end_xy": [
    435279.47164248937,
    5096875.2401231155
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.13836511878162,
   "start_distance_m": 808.0,
   "end_distance_m": 810.0,
   "midpoint_distance_m": 809.0,
   "start_elevation_m": 543.8429417271271,
   "end_elevation_m": 544.7657090295028,
   "start_xy": [
    435143.07084521814,
    5097213.674091703
   ],
   "end_xy": [
    435141.070964212,
    5097213.695900358
   ]
  },
  "max_3m": {
   "gradient_pct": 41.209869263093424,
   "start_distance_m": 596.0,
   "end_distance_m": 599.0,
   "midpoint_distance_m": 597.5,
   "start_elevation_m": 512.4926021568251,
   "end_elevation_m": 513.7288982347179,
   "start_xy": [
    435269.24025243195,
    5097054.74225766
   ],
   "end_xy": [
    435266.48034074774,
    5097055.918220029
   ]
  }
 },
 "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": 0.046,
   "windows_resited": [
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    507.0,
    555.0
   ]
  ],
  "review": [],
  "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_x43y510_ME_CrownofMaine_2018_A18.tif"
  ],
  "calculated_at": "2026-08-25T06:09:25+00:00",
  "road_source": "../ne-docs/me/elm-mountain-road/elm-mountain-road.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_CrownofMaine_2018_A18 (collected 2018)",
  "elevation_tile_ids": [
   "x43y510"
  ],
  "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": [
   [
    512.0,
    550.0
   ]
  ],
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Seboomook Lake",
  "county": "Maine"
 }
}