{
 "ocl_version": "0.1.0",
 "name": "Fire Tower Road",
 "slug": "fire-tower-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 43.21910042176569,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1510.0,
   "end_distance_m": 1512.0,
   "start_elevation_m": 307.7692269274535,
   "end_elevation_m": 308.6336089358888,
   "min_gradient_pct": -25.892337312104985,
   "suppressed_max_gradient_pct": 58.02890807061942,
   "suppressed_location_m": [
    1438.0,
    1440.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 43.50712362174439,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1655.0,
   "end_distance_m": 1658.0,
   "start_elevation_m": 332.3167575231738,
   "end_elevation_m": 333.62197123182614,
   "min_gradient_pct": -20.612379067915754,
   "suppressed_max_gradient_pct": 52.74857600188625,
   "suppressed_location_m": [
    1438.0,
    1441.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 39.4116311324035,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1653.0,
   "end_distance_m": 1658.0,
   "start_elevation_m": 331.65138967520596,
   "end_elevation_m": 333.62197123182614,
   "min_gradient_pct": -12.474336087226447,
   "suppressed_max_gradient_pct": 46.83776310249186,
   "suppressed_location_m": [
    1436.0,
    1441.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 36.78378251107972,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1653.0,
   "end_distance_m": 1663.0,
   "start_elevation_m": 331.65138967520596,
   "end_elevation_m": 335.32976792631393,
   "min_gradient_pct": -9.35204596224338,
   "suppressed_max_gradient_pct": 39.564272008748276,
   "suppressed_location_m": [
    1435.0,
    1445.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 30.932719458271833,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1649.0,
   "end_distance_m": 1669.0,
   "start_elevation_m": 330.33447456591324,
   "end_elevation_m": 336.5210184575676,
   "min_gradient_pct": -5.9361145657365455,
   "suppressed_max_gradient_pct": 34.05460321884647,
   "suppressed_location_m": [
    1428.0,
    1448.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 28.538472189383356,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1647.0,
   "end_distance_m": 1672.0,
   "start_elevation_m": 329.938844312131,
   "end_elevation_m": 337.0734623594768,
   "min_gradient_pct": -5.377057187319565,
   "suppressed_max_gradient_pct": 32.85986880876135,
   "suppressed_location_m": [
    1430.0,
    1455.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.62817960879795,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1525.0,
   "end_distance_m": 1575.0,
   "start_elevation_m": 310.5761980538714,
   "end_elevation_m": 321.89028785827037,
   "min_gradient_pct": -4.648456114542967,
   "suppressed_max_gradient_pct": 25.355590409386195,
   "suppressed_location_m": [
    1426.0,
    1476.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.55738225246705,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1487.0,
   "end_distance_m": 1587.0,
   "start_elevation_m": 303.7227901350053,
   "end_elevation_m": 324.28017238747236,
   "min_gradient_pct": -2.0799199911906214,
   "suppressed_max_gradient_pct": 21.67713341188465,
   "suppressed_location_m": [
    1428.0,
    1528.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.424,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 121.0,
  "shape_class": "sustained"
 },
 "length_m": 2189.6029878086697,
 "start_elevation_m": 200.24776471354267,
 "end_elevation_m": 373.14147221556715,
 "endpoint_gain_m": 172.89370750202448,
 "overall_gradient_pct": 7.896121281559566,
 "accumulated_ascent_m": 190.32078061133828,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 39.4116311324035,
   "start_distance_m": 1653.0,
   "end_distance_m": 1658.0,
   "midpoint_distance_m": 1655.5,
   "start_elevation_m": 331.65138967520596,
   "end_elevation_m": 333.62197123182614,
   "start_xy": [
    487906.4349213387,
    4945378.09757796
   ],
   "end_xy": [
    487904.47527511674,
    4945382.697554774
   ]
  },
  "max_10m": {
   "gradient_pct": 36.78378251107972,
   "start_distance_m": 1653.0,
   "end_distance_m": 1663.0,
   "midpoint_distance_m": 1658.0,
   "start_elevation_m": 331.65138967520596,
   "end_elevation_m": 335.32976792631393,
   "start_xy": [
    487906.4349213387,
    4945378.09757796
   ],
   "end_xy": [
    487902.51562889473,
    4945387.297531587
   ]
  },
  "max_20m": {
   "gradient_pct": 30.932719458271833,
   "start_distance_m": 1649.0,
   "end_distance_m": 1669.0,
   "midpoint_distance_m": 1659.0,
   "start_elevation_m": 330.33447456591324,
   "end_elevation_m": 336.5210184575676,
   "start_xy": [
    487908.00263831625,
    4945374.41759651
   ],
   "end_xy": [
    487900.1640534284,
    4945392.817503763
   ]
  },
  "max_25m": {
   "gradient_pct": 28.538472189383356,
   "start_distance_m": 1647.0,
   "end_distance_m": 1672.0,
   "midpoint_distance_m": 1659.5,
   "start_elevation_m": 329.938844312131,
   "end_elevation_m": 337.0734623594768,
   "start_xy": [
    487908.786496805,
    4945372.577605784
   ],
   "end_xy": [
    487898.9882656952,
    4945395.577489852
   ]
  },
  "max_50m": {
   "gradient_pct": 22.62817960879795,
   "start_distance_m": 1525.0,
   "end_distance_m": 1575.0,
   "midpoint_distance_m": 1550.0,
   "start_elevation_m": 310.5761980538714,
   "end_elevation_m": 321.89028785827037,
   "start_xy": [
    487932.78098090185,
    4945255.583658338
   ],
   "end_xy": [
    487922.0319000223,
    4945304.1309305895
   ]
  },
  "max_100m": {
   "gradient_pct": 20.55738225246705,
   "start_distance_m": 1487.0,
   "end_distance_m": 1587.0,
   "midpoint_distance_m": 1537.0,
   "start_elevation_m": 303.7227901350053,
   "end_elevation_m": 324.28017238747236,
   "start_xy": [
    487936.2091768579,
    4945217.738612791
   ],
   "end_xy": [
    487917.55730610195,
    4945315.265471857
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.474336087226447,
   "start_distance_m": 748.0,
   "end_distance_m": 753.0,
   "midpoint_distance_m": 750.5,
   "start_elevation_m": 232.8952857403658,
   "end_elevation_m": 232.27156893600448,
   "start_xy": [
    487303.3231490146,
    4944950.146021624
   ],
   "end_xy": [
    487308.2602977209,
    4944950.936314387
   ]
  },
  "min_10m": {
   "gradient_pct": -9.35204596224338,
   "start_distance_m": 828.0,
   "end_distance_m": 838.0,
   "midpoint_distance_m": 833.0,
   "start_elevation_m": 231.3857331696064,
   "end_elevation_m": 230.45052857338206,
   "start_xy": [
    487374.93478026934,
    4944969.543707037
   ],
   "end_xy": [
    487380.82298546506,
    4944977.626345194
   ]
  },
  "min_20m": {
   "gradient_pct": -5.9361145657365455,
   "start_distance_m": 2081.0,
   "end_distance_m": 2101.0,
   "midpoint_distance_m": 2091.0,
   "start_elevation_m": 367.0652674540818,
   "end_elevation_m": 365.87804454093447,
   "start_xy": [
    488128.27036790055,
    4945665.842266322
   ],
   "end_xy": [
    488146.2729304872,
    4945672.7131354
   ]
  },
  "min_25m": {
   "gradient_pct": -5.377057187319565,
   "start_distance_m": 788.0,
   "end_distance_m": 813.0,
   "midpoint_distance_m": 800.5,
   "start_elevation_m": 232.77475663065354,
   "end_elevation_m": 231.43049233382365,
   "start_xy": [
    487343.14510765666,
    4944949.865610112
   ],
   "end_xy": [
    487366.10247247573,
    4944957.419749802
   ]
  },
  "min_50m": {
   "gradient_pct": -4.648456114542967,
   "start_distance_m": 788.0,
   "end_distance_m": 838.0,
   "midpoint_distance_m": 813.0,
   "start_elevation_m": 232.77475663065354,
   "end_elevation_m": 230.45052857338206,
   "start_xy": [
    487343.14510765666,
    4944949.865610112
   ],
   "end_xy": [
    487380.82298546506,
    4944977.626345194
   ]
  },
  "min_100m": {
   "gradient_pct": -2.0799199911906214,
   "start_distance_m": 748.0,
   "end_distance_m": 848.0,
   "midpoint_distance_m": 798.0,
   "start_elevation_m": 232.8952857403658,
   "end_elevation_m": 230.81536574917519,
   "start_xy": [
    487303.3231490146,
    4944950.146021624
   ],
   "end_xy": [
    487388.69816882664,
    4944982.932726549
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 43.21910042176569,
   "start_distance_m": 1510.0,
   "end_distance_m": 1512.0,
   "midpoint_distance_m": 1511.0,
   "start_elevation_m": 307.7692269274535,
   "end_elevation_m": 308.6336089358888,
   "start_xy": [
    487934.13421614765,
    4945240.644824569
   ],
   "end_xy": [
    487933.95378478157,
    4945242.636669071
   ]
  },
  "max_3m": {
   "gradient_pct": 43.50712362174439,
   "start_distance_m": 1655.0,
   "end_distance_m": 1658.0,
   "midpoint_distance_m": 1656.5,
   "start_elevation_m": 332.3167575231738,
   "end_elevation_m": 333.62197123182614,
   "start_xy": [
    487905.6510628499,
    4945379.937568686
   ],
   "end_xy": [
    487904.47527511674,
    4945382.697554774
   ]
  }
 },
 "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": 0.003,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    1436.0,
    1441.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "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_x48y495_ME_MidCoast_2021_B21.tif"
  ],
  "calculated_at": "2026-08-24T20:35:12+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/maine-2026-08-22.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-me-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, ME_MidCoast_2021_B21 (collected 2021)",
  "elevation_tile_ids": [
   "x48y495"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 19.4% over 200 m (Terrain 50), gain 168.1 m over 2038 m way. EXTENDED by graph walk: +1 segment(s) at base, +0 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,qualified-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": "Dixmont",
  "county": "Maine"
 }
}