{
 "ocl_version": "0.1.0",
 "name": "Gordon Hill Road",
 "slug": "gordon-hill-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 48.52238983525581,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 2207.0,
   "end_distance_m": 2209.0,
   "start_elevation_m": 174.54820657747527,
   "end_elevation_m": 175.5186543741804,
   "min_gradient_pct": -46.93879731973851,
   "suppressed_max_gradient_pct": 64.15474009542237,
   "suppressed_location_m": [
    1836.0,
    1838.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 46.86062768118878,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 2206.0,
   "end_distance_m": 2209.0,
   "start_elevation_m": 174.11283554374472,
   "end_elevation_m": 175.5186543741804,
   "min_gradient_pct": -38.43928654090215,
   "suppressed_max_gradient_pct": 49.74103798915811,
   "suppressed_location_m": [
    1835.0,
    1838.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 40.03973655263337,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2206.0,
   "end_distance_m": 2211.0,
   "start_elevation_m": 174.11283554374472,
   "end_elevation_m": 176.1148223713764,
   "min_gradient_pct": -25.828551284560035
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 32.14902346854174,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1605.0,
   "end_distance_m": 1615.0,
   "start_elevation_m": 122.7463221173312,
   "end_elevation_m": 125.96122446418538,
   "min_gradient_pct": -17.11939264819165
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.038858928597733,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1866.0,
   "end_distance_m": 1886.0,
   "start_elevation_m": 141.45937454851767,
   "end_elevation_m": 145.86714633423722,
   "min_gradient_pct": -12.94085669581662
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.947685095023417,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1866.0,
   "end_distance_m": 1891.0,
   "start_elevation_m": 141.45937454851767,
   "end_elevation_m": 146.69629582227353,
   "min_gradient_pct": -12.206400813884215
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.745943574162936,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1567.0,
   "end_distance_m": 1617.0,
   "start_elevation_m": 117.35649023465221,
   "end_elevation_m": 126.22946202173368,
   "min_gradient_pct": -10.350890674629795
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.299005504115996,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1559.0,
   "end_distance_m": 1659.0,
   "start_elevation_m": 116.0396385116965,
   "end_elevation_m": 130.3386440158125,
   "min_gradient_pct": -9.095302344595922,
   "suppressed_max_gradient_pct": 14.667685314208143,
   "suppressed_location_m": [
    1831.0,
    1931.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.493,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 99.0,
  "shape_class": "stepped"
 },
 "length_m": 2549.471547374436,
 "start_elevation_m": 114.62400717764051,
 "end_elevation_m": 199.8391861018452,
 "endpoint_gain_m": 85.2151789242047,
 "overall_gradient_pct": 3.342464402552884,
 "accumulated_ascent_m": 140.14295609332282,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 40.03973655263337,
   "start_distance_m": 2206.0,
   "end_distance_m": 2211.0,
   "midpoint_distance_m": 2208.5,
   "start_elevation_m": 174.11283554374472,
   "end_elevation_m": 176.1148223713764,
   "start_xy": [
    411634.5193599,
    4928145.822000914
   ],
   "end_xy": [
    411629.9263654305,
    4928147.797956099
   ]
  },
  "max_10m": {
   "gradient_pct": 32.14902346854174,
   "start_distance_m": 1605.0,
   "end_distance_m": 1615.0,
   "midpoint_distance_m": 1610.0,
   "start_elevation_m": 122.7463221173312,
   "end_elevation_m": 125.96122446418538,
   "start_xy": [
    411914.5447155295,
    4927645.587213353
   ],
   "end_xy": [
    411906.54339618556,
    4927651.58545286
   ]
  },
  "max_20m": {
   "gradient_pct": 22.038858928597733,
   "start_distance_m": 1866.0,
   "end_distance_m": 1886.0,
   "midpoint_distance_m": 1876.0,
   "start_elevation_m": 141.45937454851767,
   "end_elevation_m": 145.86714633423722,
   "start_xy": [
    411817.8053415898,
    4927883.984176856
   ],
   "end_xy": [
    411811.1974675295,
    4927902.861038339
   ]
  },
  "max_25m": {
   "gradient_pct": 20.947685095023417,
   "start_distance_m": 1866.0,
   "end_distance_m": 1891.0,
   "midpoint_distance_m": 1878.5,
   "start_elevation_m": 141.45937454851767,
   "end_elevation_m": 146.69629582227353,
   "start_xy": [
    411817.8053415898,
    4927883.984176856
   ],
   "end_xy": [
    411809.54540392716,
    4927907.580220281
   ]
  },
  "max_50m": {
   "gradient_pct": 17.745943574162936,
   "start_distance_m": 1567.0,
   "end_distance_m": 1617.0,
   "midpoint_distance_m": 1592.0,
   "start_elevation_m": 117.35649023465221,
   "end_elevation_m": 126.22946202173368,
   "start_xy": [
    411945.5607442192,
    4927623.787972227
   ],
   "end_xy": [
    411904.94339618564,
    4927652.78545286
   ]
  },
  "max_100m": {
   "gradient_pct": 14.299005504115996,
   "start_distance_m": 1559.0,
   "end_distance_m": 1659.0,
   "midpoint_distance_m": 1609.0,
   "start_elevation_m": 116.0396385116965,
   "end_elevation_m": 130.3386440158125,
   "start_xy": [
    411952.7510267788,
    4927620.280862217
   ],
   "end_xy": [
    411880.7929293007,
    4927687.086228504
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -25.828551284560035,
   "start_distance_m": 1212.0,
   "end_distance_m": 1217.0,
   "midpoint_distance_m": 1214.5,
   "start_elevation_m": 132.1259503294606,
   "end_elevation_m": 130.8345227652326,
   "start_xy": [
    412238.34131348087,
    4927463.525138391
   ],
   "end_xy": [
    412235.9282331912,
    4927467.9042981835
   ]
  },
  "min_10m": {
   "gradient_pct": -17.11939264819165,
   "start_distance_m": 1304.0,
   "end_distance_m": 1314.0,
   "midpoint_distance_m": 1309.0,
   "start_elevation_m": 126.19547564748424,
   "end_elevation_m": 124.48353638266508,
   "start_xy": [
    412188.6715257771,
    4927539.560760597
   ],
   "end_xy": [
    412180.69135154475,
    4927545.587103221
   ]
  },
  "min_20m": {
   "gradient_pct": -12.94085669581662,
   "start_distance_m": 1304.0,
   "end_distance_m": 1324.0,
   "midpoint_distance_m": 1314.0,
   "start_elevation_m": 126.19547564748424,
   "end_elevation_m": 123.60730430832092,
   "start_xy": [
    412188.6715257771,
    4927539.560760597
   ],
   "end_xy": [
    412172.71109199343,
    4927551.613332742
   ]
  },
  "min_25m": {
   "gradient_pct": -12.206400813884215,
   "start_distance_m": 1303.0,
   "end_distance_m": 1328.0,
   "midpoint_distance_m": 1315.5,
   "start_elevation_m": 126.33048606224642,
   "end_elevation_m": 123.27888585877537,
   "start_xy": [
    412189.46982541156,
    4927538.958500128
   ],
   "end_xy": [
    412169.51925408305,
    4927554.024176744
   ]
  },
  "min_50m": {
   "gradient_pct": -10.350890674629795,
   "start_distance_m": 1303.0,
   "end_distance_m": 1353.0,
   "midpoint_distance_m": 1328.0,
   "start_elevation_m": 126.33048606224642,
   "end_elevation_m": 121.15504072493152,
   "start_xy": [
    412189.46982541156,
    4927538.958500128
   ],
   "end_xy": [
    412149.1696186108,
    4927568.4585545305
   ]
  },
  "min_100m": {
   "gradient_pct": -9.095302344595922,
   "start_distance_m": 1297.0,
   "end_distance_m": 1397.0,
   "midpoint_distance_m": 1347.0,
   "start_elevation_m": 126.86406991741599,
   "end_elevation_m": 117.76876757282007,
   "start_xy": [
    412194.257814849,
    4927535.342542163
   ],
   "end_xy": [
    412109.99667638977,
    4927588.495524992
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 48.52238983525581,
   "start_distance_m": 2207.0,
   "end_distance_m": 2209.0,
   "midpoint_distance_m": 2208.0,
   "start_elevation_m": 174.54820657747527,
   "end_elevation_m": 175.5186543741804,
   "start_xy": [
    411633.6008056898,
    4928146.217295917
   ],
   "end_xy": [
    411631.7636864757,
    4928147.007860394
   ]
  },
  "max_3m": {
   "gradient_pct": 46.86062768118878,
   "start_distance_m": 2206.0,
   "end_distance_m": 2209.0,
   "midpoint_distance_m": 2207.5,
   "start_elevation_m": 174.11283554374472,
   "end_elevation_m": 175.5186543741804,
   "start_xy": [
    411634.5193599,
    4928145.822000914
   ],
   "end_xy": [
    411631.7636864757,
    4928147.007860394
   ]
  }
 },
 "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": 0.002,
   "windows_resited": [
    2.0,
    3.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    1835.0,
    1840.0
   ]
  ],
  "review": [],
  "extent": [
   "descends_at_start"
  ]
 },
 "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_x41y493_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-09-03T17:03:08+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/gordon-hill-road/gordon-hill-road.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, ME_WesternMtns_B24 (collected 2024)",
  "elevation_tile_ids": [
   "x41y493"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: USGS_LPC_ME_SouthernAreas_2012_LAS_2016: no corridor points fetched; ME_ME_MA_QL2_L1_2015: no corridor points fetched; USGS_LPC_ME_NRCS_Lot4_2013_LAS_2015: EPT covers only 10% of stations; ME_MidCentral_1_B23: no corridor points fetched; ME_SouthCentral_1_B22: EPT covers only 78% of stations",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Chesterville",
  "county": "Maine"
 }
}