{
 "ocl_version": "0.1.0",
 "name": "Brunswick Avenue",
 "slug": "brunswick-avenue",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 50.46039000890792,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 4.0,
   "end_distance_m": 6.0,
   "start_elevation_m": 4.199627354425431,
   "end_elevation_m": 5.208835154603589,
   "min_gradient_pct": -9.192212360496654
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 49.393624663541516,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 4.0,
   "end_distance_m": 7.0,
   "start_elevation_m": 4.199627354425431,
   "end_elevation_m": 5.681436094331676,
   "min_gradient_pct": -8.219286766947675
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 49.63927214252607,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 4.0,
   "end_distance_m": 9.0,
   "start_elevation_m": 4.199627354425431,
   "end_elevation_m": 6.681590961551734,
   "min_gradient_pct": -6.89823354700934
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 46.46730694272296,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2.0,
   "end_distance_m": 12.0,
   "start_elevation_m": 3.342666650248986,
   "end_elevation_m": 7.989397344521283,
   "min_gradient_pct": -6.581625775033899
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.25459886221168,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "start_elevation_m": 2.744513098335896,
   "end_elevation_m": 7.995432870778232,
   "min_gradient_pct": -6.531394069436232
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.092297147719975,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "start_elevation_m": 2.744513098335896,
   "end_elevation_m": 8.01758738526589,
   "min_gradient_pct": -6.500144406400921
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 12.33571948528451,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "start_elevation_m": 2.744513098335896,
   "end_elevation_m": 8.91237284097815,
   "min_gradient_pct": -6.426234931124128
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 11.86103958742796,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 2.744513098335896,
   "end_elevation_m": 14.605552685763856,
   "min_gradient_pct": -6.34374299498269
  }
 ],
 "shape": {
  "ascent_concentration": 0.547,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 105.0,
  "shape_class": "stepped"
 },
 "length_m": 7454.872638890215,
 "start_elevation_m": 2.744513098335896,
 "end_elevation_m": 90.31604056835803,
 "endpoint_gain_m": 87.57152747002213,
 "overall_gradient_pct": 1.1746884448861443,
 "accumulated_ascent_m": 142.08501783810357,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 49.63927214252607,
   "start_distance_m": 4.0,
   "end_distance_m": 9.0,
   "midpoint_distance_m": 6.5,
   "start_elevation_m": 4.199627354425431,
   "end_elevation_m": 6.681590961551734,
   "start_xy": [
    438145.3739794874,
    4897726.122253379
   ],
   "end_xy": [
    438144.6077038466,
    4897721.181320103
   ]
  },
  "max_10m": {
   "gradient_pct": 46.46730694272296,
   "start_distance_m": 2.0,
   "end_distance_m": 12.0,
   "midpoint_distance_m": 7.0,
   "start_elevation_m": 3.342666650248986,
   "end_elevation_m": 7.989397344521283,
   "start_xy": [
    438145.6804897437,
    4897728.09862669
   ],
   "end_xy": [
    438144.1479384621,
    4897718.216760137
   ]
  },
  "max_20m": {
   "gradient_pct": 26.25459886221168,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 2.744513098335896,
   "end_elevation_m": 7.995432870778232,
   "start_xy": [
    438145.987,
    4897730.075
   ],
   "end_xy": [
    438142.92189743684,
    4897710.311266894
   ]
  },
  "max_25m": {
   "gradient_pct": 21.092297147719975,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 2.744513098335896,
   "end_elevation_m": 8.01758738526589,
   "start_xy": [
    438145.987,
    4897730.075
   ],
   "end_xy": [
    438142.15562179603,
    4897705.370333618
   ]
  },
  "max_50m": {
   "gradient_pct": 12.33571948528451,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 2.744513098335896,
   "end_elevation_m": 8.91237284097815,
   "start_xy": [
    438145.987,
    4897730.075
   ],
   "end_xy": [
    438138.0748992241,
    4897680.706763893
   ]
  },
  "max_100m": {
   "gradient_pct": 11.86103958742796,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 2.744513098335896,
   "end_elevation_m": 14.605552685763856,
   "start_xy": [
    438145.987,
    4897730.075
   ],
   "end_xy": [
    438128.58707163663,
    4897631.639944888
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.89823354700934,
   "start_distance_m": 7240.0,
   "end_distance_m": 7245.0,
   "midpoint_distance_m": 7242.5,
   "start_elevation_m": 102.66953779148139,
   "end_elevation_m": 102.32462611413092,
   "start_xy": [
    433696.32347573095,
    4892280.011718609
   ],
   "end_xy": [
    433692.3704006053,
    4892276.950150866
   ]
  },
  "min_10m": {
   "gradient_pct": -6.581625775033899,
   "start_distance_m": 7238.0,
   "end_distance_m": 7248.0,
   "midpoint_distance_m": 7243.0,
   "start_elevation_m": 102.79662357984614,
   "end_elevation_m": 102.13846100234275,
   "start_xy": [
    433697.9047057812,
    4892281.236345707
   ],
   "end_xy": [
    433689.99855553,
    4892275.113210219
   ]
  },
  "min_20m": {
   "gradient_pct": -6.531394069436232,
   "start_distance_m": 7227.0,
   "end_distance_m": 7247.0,
   "midpoint_distance_m": 7237.0,
   "start_elevation_m": 103.50737777280371,
   "end_elevation_m": 102.20109895891646,
   "start_xy": [
    433706.60147105757,
    4892287.971794744
   ],
   "end_xy": [
    433690.7891705551,
    4892275.725523768
   ]
  },
  "min_25m": {
   "gradient_pct": -6.500144406400921,
   "start_distance_m": 7227.0,
   "end_distance_m": 7252.0,
   "midpoint_distance_m": 7239.5,
   "start_elevation_m": 103.50737777280371,
   "end_elevation_m": 101.88234167120348,
   "start_xy": [
    433706.60147105757,
    4892287.971794744
   ],
   "end_xy": [
    433686.8360954295,
    4892272.663956024
   ]
  },
  "min_50m": {
   "gradient_pct": -6.426234931124128,
   "start_distance_m": 7298.0,
   "end_distance_m": 7348.0,
   "midpoint_distance_m": 7323.0,
   "start_elevation_m": 99.03148647503072,
   "end_elevation_m": 95.81836900946865,
   "start_xy": [
    433650.46780427377,
    4892244.497532779
   ],
   "end_xy": [
    433610.82985214004,
    4892214.021447909
   ]
  },
  "min_100m": {
   "gradient_pct": -6.34374299498269,
   "start_distance_m": 7228.0,
   "end_distance_m": 7328.0,
   "midpoint_distance_m": 7278.0,
   "start_elevation_m": 103.44162115484309,
   "end_elevation_m": 97.0978781598604,
   "start_xy": [
    433705.8108560324,
    4892287.359481195
   ],
   "end_xy": [
    433626.7417880844,
    4892226.137977714
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 50.46039000890792,
   "start_distance_m": 4.0,
   "end_distance_m": 6.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 4.199627354425431,
   "end_elevation_m": 5.208835154603589,
   "start_xy": [
    438145.3739794874,
    4897726.122253379
   ],
   "end_xy": [
    438145.0674692311,
    4897724.145880069
   ]
  },
  "max_3m": {
   "gradient_pct": 49.393624663541516,
   "start_distance_m": 4.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 5.5,
   "start_elevation_m": 4.199627354425431,
   "end_elevation_m": 5.681436094331676,
   "start_xy": [
    438145.3739794874,
    4897726.122253379
   ],
   "end_xy": [
    438144.9142141029,
    4897723.157693413
   ]
  }
 },
 "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": [
   "max5_over_45",
   "max10_over_40"
  ],
  "extent": [
   "may_start_earlier",
   "descends_at_end"
  ],
  "suggested_summit_cut_m": 6875.0,
  "trailing_descent_m": 24.3
 },
 "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_x43y490_ME_SouthCoastal_2020_A20.tif"
  ],
  "calculated_at": "2026-08-24T20:59:16+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-3-260824",
  "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_SouthCoastal_2020_A20 (collected 2020)",
  "elevation_tile_ids": [
   "x43y490"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 9.9% over 200 m (Terrain 50), gain 78.1 m over 7380 m way. EXTENDED by graph walk: +2 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. 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": "Gardiner",
  "county": "Maine"
 }
}