{
 "ocl_version": "0.1.0",
 "name": "Eastman Hill Road",
 "slug": "eastman-hill-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.48220928092337,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 785.0,
   "end_distance_m": 787.0,
   "start_elevation_m": 358.6742443222496,
   "end_elevation_m": 359.12388850786806,
   "min_gradient_pct": -14.60199898923804
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.778952946010577,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 585.0,
   "end_distance_m": 588.0,
   "start_elevation_m": 328.11393537592704,
   "end_elevation_m": 328.76730396430736,
   "min_gradient_pct": -14.542915726912042
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.48033426682332,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 785.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 358.6742443222496,
   "end_elevation_m": 359.74826103559076,
   "min_gradient_pct": -13.733741239262827
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.8114888190255,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 780.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 357.6671121536882,
   "end_elevation_m": 359.74826103559076,
   "min_gradient_pct": -13.396507049502588
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.380655496361157,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 770.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 355.6721299363185,
   "end_elevation_m": 359.74826103559076,
   "min_gradient_pct": -12.945120102116618
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.295813796360108,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 765.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 354.67430758650073,
   "end_elevation_m": 359.74826103559076,
   "min_gradient_pct": -12.730942771493119
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.15597067187798,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 769.0,
   "end_distance_m": 819.0,
   "start_elevation_m": 355.4721948293443,
   "end_elevation_m": 365.5501801652833,
   "min_gradient_pct": -11.197251756320611
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.488209436971033,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 732.0,
   "end_distance_m": 832.0,
   "start_elevation_m": 348.5229862273536,
   "end_elevation_m": 368.01119566432465,
   "min_gradient_pct": -9.05167869643725
  }
 ],
 "shape": {
  "ascent_concentration": 0.684,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 383.0,
  "shape_class": "stepped"
 },
 "length_m": 3810.462491274471,
 "start_elevation_m": 255.9507566953182,
 "end_elevation_m": 342.53943311279045,
 "endpoint_gain_m": 86.58867641747224,
 "overall_gradient_pct": 2.2723928293678397,
 "accumulated_ascent_m": 183.85707808537853,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.48033426682332,
   "start_distance_m": 785.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 787.5,
   "start_elevation_m": 358.6742443222496,
   "end_elevation_m": 359.74826103559076,
   "start_xy": [
    242763.49710279872,
    4836186.606354647
   ],
   "end_xy": [
    242764.54038628703,
    4836181.716409907
   ]
  },
  "max_10m": {
   "gradient_pct": 20.8114888190255,
   "start_distance_m": 780.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 785.0,
   "start_elevation_m": 357.6671121536882,
   "end_elevation_m": 359.74826103559076,
   "start_xy": [
    242762.45381931044,
    4836191.496299388
   ],
   "end_xy": [
    242764.54038628703,
    4836181.716409907
   ]
  },
  "max_20m": {
   "gradient_pct": 20.380655496361157,
   "start_distance_m": 770.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 780.0,
   "start_elevation_m": 355.6721299363185,
   "end_elevation_m": 359.74826103559076,
   "start_xy": [
    242760.36725233382,
    4836201.276188868
   ],
   "end_xy": [
    242764.54038628703,
    4836181.716409907
   ]
  },
  "max_25m": {
   "gradient_pct": 20.295813796360108,
   "start_distance_m": 765.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 777.5,
   "start_elevation_m": 354.67430758650073,
   "end_elevation_m": 359.74826103559076,
   "start_xy": [
    242759.32396884554,
    4836206.166133609
   ],
   "end_xy": [
    242764.54038628703,
    4836181.716409907
   ]
  },
  "max_50m": {
   "gradient_pct": 20.15597067187798,
   "start_distance_m": 769.0,
   "end_distance_m": 819.0,
   "midpoint_distance_m": 794.0,
   "start_elevation_m": 355.4721948293443,
   "end_elevation_m": 365.5501801652833,
   "start_xy": [
    242760.15859563617,
    4836202.254177816
   ],
   "end_xy": [
    242770.59143051918,
    4836153.354730413
   ]
  },
  "max_100m": {
   "gradient_pct": 19.488209436971033,
   "start_distance_m": 732.0,
   "end_distance_m": 832.0,
   "midpoint_distance_m": 782.0,
   "start_elevation_m": 348.5229862273536,
   "end_elevation_m": 368.01119566432465,
   "start_xy": [
    242754.99073805616,
    4836238.812820965
   ],
   "end_xy": [
    242773.30396758876,
    4836140.640874089
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.733741239262827,
   "start_distance_m": 1970.0,
   "end_distance_m": 1975.0,
   "midpoint_distance_m": 1972.5,
   "start_elevation_m": 429.41251847248975,
   "end_elevation_m": 428.7258314105266,
   "start_xy": [
    243146.2292136266,
    4835161.315451634
   ],
   "end_xy": [
    243143.8781984421,
    4835156.902660273
   ]
  },
  "min_10m": {
   "gradient_pct": -13.396507049502588,
   "start_distance_m": 1966.0,
   "end_distance_m": 1976.0,
   "midpoint_distance_m": 1971.0,
   "start_elevation_m": 429.92123462345427,
   "end_elevation_m": 428.581583918504,
   "start_xy": [
    243148.11002577416,
    4835164.845684724
   ],
   "end_xy": [
    243143.4079954052,
    4835156.020102001
   ]
  },
  "min_20m": {
   "gradient_pct": -12.945120102116618,
   "start_distance_m": 1964.0,
   "end_distance_m": 1984.0,
   "midpoint_distance_m": 1974.0,
   "start_elevation_m": 430.1635724232148,
   "end_elevation_m": 427.5745484027915,
   "start_xy": [
    243149.05043184795,
    4835166.610801268
   ],
   "end_xy": [
    243139.64637111005,
    4835148.959635821
   ]
  },
  "min_25m": {
   "gradient_pct": -12.730942771493119,
   "start_distance_m": 1960.0,
   "end_distance_m": 1985.0,
   "midpoint_distance_m": 1972.5,
   "start_elevation_m": 430.6484104995829,
   "end_elevation_m": 427.4656748067096,
   "start_xy": [
    243150.93124399552,
    4835170.141034358
   ],
   "end_xy": [
    243139.17616807314,
    4835148.077077549
   ]
  },
  "min_50m": {
   "gradient_pct": -11.197251756320611,
   "start_distance_m": 1953.0,
   "end_distance_m": 2003.0,
   "midpoint_distance_m": 1978.0,
   "start_elevation_m": 431.34364446820956,
   "end_elevation_m": 425.74501859004926,
   "start_xy": [
    243154.2226652538,
    4835176.318942265
   ],
   "end_xy": [
    243130.71251340903,
    4835132.191028647
   ]
  },
  "min_100m": {
   "gradient_pct": -9.05167869643725,
   "start_distance_m": 1933.0,
   "end_distance_m": 2033.0,
   "midpoint_distance_m": 1983.0,
   "start_elevation_m": 432.7671704664626,
   "end_elevation_m": 423.7154917700253,
   "start_xy": [
    243163.62672599172,
    4835193.970107712
   ],
   "end_xy": [
    243116.58014172857,
    4835105.728515445
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.48220928092337,
   "start_distance_m": 785.0,
   "end_distance_m": 787.0,
   "midpoint_distance_m": 786.0,
   "start_elevation_m": 358.6742443222496,
   "end_elevation_m": 359.12388850786806,
   "start_xy": [
    242763.49710279872,
    4836186.606354647
   ],
   "end_xy": [
    242763.91441619405,
    4836184.650376751
   ]
  },
  "max_3m": {
   "gradient_pct": 21.778952946010577,
   "start_distance_m": 585.0,
   "end_distance_m": 588.0,
   "midpoint_distance_m": 586.5,
   "start_elevation_m": 328.11393537592704,
   "end_elevation_m": 328.76730396430736,
   "start_xy": [
    242857.11870144765,
    4836321.361805756
   ],
   "end_xy": [
    242857.46916954077,
    4836318.382347396
   ]
  }
 },
 "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": {
  "review": [],
  "extent": [
   "may_start_earlier"
  ],
  "suggested_summit_cut_m": 1816.0,
  "trailing_descent_m": 94.0
 },
 "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/nh/USGS_one_meter_x24y484_NH_CT_RiverNorthL6_2015.tif"
  ],
  "calculated_at": "2026-08-24T20:21:32+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-hampshire-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-nh-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, NH_CT_RiverNorthL6_2015 (collected 2015)",
  "elevation_tile_ids": [
   "x24y484"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 17.8% over 200 m (Terrain 50), gain 85.2 m over 3760 m way. EXTENDED by graph walk: +0 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): discovered-lane-43-6371-72-1888 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": "Lebanon",
  "county": "New Hampshire"
 }
}