{
 "ocl_version": "0.1.0",
 "name": "Tucker Mountain Road",
 "slug": "tucker-mountain-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 54.71922824318085,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 788.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 244.5401148043075,
   "end_elevation_m": 245.63449936917112,
   "min_gradient_pct": -34.63577135521234
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 50.22015557975408,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 788.0,
   "end_distance_m": 791.0,
   "start_elevation_m": 244.5401148043075,
   "end_elevation_m": 246.04671947170013,
   "min_gradient_pct": -31.74874949211528
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.993466317925595,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 786.0,
   "end_distance_m": 791.0,
   "start_elevation_m": 244.14704615580385,
   "end_elevation_m": 246.04671947170013,
   "min_gradient_pct": -27.669128152615485
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.948467245849542,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 856.0,
   "end_distance_m": 866.0,
   "start_elevation_m": 250.3501255543812,
   "end_elevation_m": 253.44497227896616,
   "min_gradient_pct": -18.477113969358072
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.42696079170682,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 782.0,
   "end_distance_m": 802.0,
   "start_elevation_m": 243.43310317113932,
   "end_elevation_m": 248.5184953294807,
   "min_gradient_pct": -17.297691406086244
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.28402162947782,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 780.0,
   "end_distance_m": 805.0,
   "start_elevation_m": 243.28553170426437,
   "end_elevation_m": 248.85653711163383,
   "min_gradient_pct": -16.355895529829695
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 15.708706800644109,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 775.0,
   "end_distance_m": 825.0,
   "start_elevation_m": 242.96370362848003,
   "end_elevation_m": 250.8180570288021,
   "min_gradient_pct": -13.175202152820077
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.384806308311086,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 630.0,
   "end_distance_m": 730.0,
   "start_elevation_m": 225.56623426083678,
   "end_elevation_m": 239.95104056914786,
   "min_gradient_pct": -10.04478112487206
  }
 ],
 "shape": {
  "ascent_concentration": 0.47,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 140.0,
  "shape_class": "stepped"
 },
 "length_m": 3359.0712081470247,
 "start_elevation_m": 168.50381050282024,
 "end_elevation_m": 273.66778972083404,
 "endpoint_gain_m": 105.1639792180138,
 "overall_gradient_pct": 3.1307457538545527,
 "accumulated_ascent_m": 184.20163692762355,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.993466317925595,
   "start_distance_m": 786.0,
   "end_distance_m": 791.0,
   "midpoint_distance_m": 788.5,
   "start_elevation_m": 244.14704615580385,
   "end_elevation_m": 246.04671947170013,
   "start_xy": [
    293086.9321998953,
    4829998.573467269
   ],
   "end_xy": [
    293083.4860234036,
    4829995.105228673
   ]
  },
  "max_10m": {
   "gradient_pct": 30.948467245849542,
   "start_distance_m": 856.0,
   "end_distance_m": 866.0,
   "midpoint_distance_m": 861.0,
   "start_elevation_m": 250.3501255543812,
   "end_elevation_m": 253.44497227896616,
   "start_xy": [
    293051.7511877078,
    4829939.276243602
   ],
   "end_xy": [
    293044.10209243593,
    4829932.895035473
   ]
  },
  "max_20m": {
   "gradient_pct": 25.42696079170682,
   "start_distance_m": 782.0,
   "end_distance_m": 802.0,
   "midpoint_distance_m": 792.0,
   "start_elevation_m": 243.43310317113932,
   "end_elevation_m": 248.5184953294807,
   "start_xy": [
    293090.3759966274,
    4830000.608231154
   ],
   "end_xy": [
    293077.2035394067,
    4829986.075810374
   ]
  },
  "max_25m": {
   "gradient_pct": 22.28402162947782,
   "start_distance_m": 780.0,
   "end_distance_m": 805.0,
   "midpoint_distance_m": 792.5,
   "start_elevation_m": 243.28553170426437,
   "end_elevation_m": 248.85653711163383,
   "start_xy": [
    293092.0978949934,
    4830001.625613096
   ],
   "end_xy": [
    293075.4901346803,
    4829983.613241746
   ]
  },
  "max_50m": {
   "gradient_pct": 15.708706800644109,
   "start_distance_m": 775.0,
   "end_distance_m": 825.0,
   "midpoint_distance_m": 800.0,
   "start_elevation_m": 242.96370362848003,
   "end_elevation_m": 250.8180570288021,
   "start_xy": [
    293096.40264090843,
    4830004.169067953
   ],
   "end_xy": [
    293067.1069692085,
    4829965.635461636
   ]
  },
  "max_100m": {
   "gradient_pct": 14.384806308311086,
   "start_distance_m": 630.0,
   "end_distance_m": 730.0,
   "midpoint_distance_m": 680.0,
   "start_elevation_m": 225.56623426083678,
   "end_elevation_m": 239.95104056914786,
   "start_xy": [
    293232.6494423373,
    4829981.411349359
   ],
   "end_xy": [
    293139.1664360085,
    4830015.732276231
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -27.669128152615485,
   "start_distance_m": 833.0,
   "end_distance_m": 838.0,
   "midpoint_distance_m": 835.5,
   "start_elevation_m": 250.80539139389614,
   "end_elevation_m": 249.42193498626537,
   "start_xy": [
    293063.848010022,
    4829958.332971177
   ],
   "end_xy": [
    293061.76270289725,
    4829953.788579668
   ]
  },
  "min_10m": {
   "gradient_pct": -18.477113969358072,
   "start_distance_m": 2269.0,
   "end_distance_m": 2279.0,
   "midpoint_distance_m": 2274.0,
   "start_elevation_m": 249.2203938334004,
   "end_elevation_m": 247.3726824364646,
   "start_xy": [
    291837.6661871439,
    4830267.058561946
   ],
   "end_xy": [
    291827.9331469003,
    4830269.353758587
   ]
  },
  "min_20m": {
   "gradient_pct": -17.297691406086244,
   "start_distance_m": 2264.0,
   "end_distance_m": 2284.0,
   "midpoint_distance_m": 2274.0,
   "start_elevation_m": 250.00422167668702,
   "end_elevation_m": 246.54468339546978,
   "start_xy": [
    291842.6086778563,
    4830266.314887306
   ],
   "end_xy": [
    291823.0666267785,
    4830270.501356907
   ]
  },
  "min_25m": {
   "gradient_pct": -16.355895529829695,
   "start_distance_m": 2259.0,
   "end_distance_m": 2284.0,
   "midpoint_distance_m": 2271.5,
   "start_elevation_m": 250.6336572779272,
   "end_elevation_m": 246.54468339546978,
   "start_xy": [
    291847.55959357566,
    4830265.616007102
   ],
   "end_xy": [
    291823.0666267785,
    4830270.501356907
   ]
  },
  "min_50m": {
   "gradient_pct": -13.175202152820077,
   "start_distance_m": 2512.0,
   "end_distance_m": 2562.0,
   "midpoint_distance_m": 2537.0,
   "start_elevation_m": 247.37608269111308,
   "end_elevation_m": 240.78848161470304,
   "start_xy": [
    291607.13498104,
    4830320.451206785
   ],
   "end_xy": [
    291570.29947143135,
    4830353.165005746
   ]
  },
  "min_100m": {
   "gradient_pct": -10.04478112487206,
   "start_distance_m": 2507.0,
   "end_distance_m": 2607.0,
   "midpoint_distance_m": 2557.0,
   "start_elevation_m": 247.62601854307204,
   "end_elevation_m": 237.58123741819998,
   "start_xy": [
    291611.53097595,
    4830318.0689329235
   ],
   "end_xy": [
    291529.80097358447,
    4830372.572595246
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 54.71922824318085,
   "start_distance_m": 788.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 789.0,
   "start_elevation_m": 244.5401148043075,
   "end_elevation_m": 245.63449936917112,
   "start_xy": [
    293085.2103015293,
    4829997.556085326
   ],
   "end_xy": [
    293084.05715831235,
    4829995.926084883
   ]
  },
  "max_3m": {
   "gradient_pct": 50.22015557975408,
   "start_distance_m": 788.0,
   "end_distance_m": 791.0,
   "midpoint_distance_m": 789.5,
   "start_elevation_m": 244.5401148043075,
   "end_elevation_m": 246.04671947170013,
   "start_xy": [
    293085.2103015293,
    4829997.556085326
   ],
   "end_xy": [
    293083.4860234036,
    4829995.105228673
   ]
  }
 },
 "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": 1347.0,
  "trailing_descent_m": 12.8
 },
 "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_x29y483_NH_CT_RiverNorthL6_2015.tif",
   "data/cache/usa/nh/USGS_one_meter_x29y484_NH_CT_RiverNorthL6_2015.tif"
  ],
  "calculated_at": "2026-08-24T20:52:45+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": [
   "x29y483",
   "x29y484"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.6% over 200 m (Terrain 50), gain 35.9 m over 2532 m way. EXTENDED by graph walk: +3 segment(s) at base, +2 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. 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": "Meredith",
  "county": "New Hampshire"
 }
}