{
 "ocl_version": "0.1.0",
 "name": "Mountain Avenue",
 "slug": "mountain-avenue",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.55589372344906,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 350.0,
   "end_distance_m": 352.0,
   "start_elevation_m": 216.1121482874608,
   "end_elevation_m": 216.54326616192978,
   "min_gradient_pct": 0.5222624158804479
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.428379783580453,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 356.0,
   "end_distance_m": 359.0,
   "start_elevation_m": 217.35425676778436,
   "end_elevation_m": 217.99710816129178,
   "min_gradient_pct": 0.7893044181865131
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.055573987166554,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 355.0,
   "end_distance_m": 360.0,
   "start_elevation_m": 217.14514981487093,
   "end_elevation_m": 218.19792851422926,
   "min_gradient_pct": 1.047375755141502
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.95176094089055,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 349.0,
   "end_distance_m": 359.0,
   "start_elevation_m": 215.90193206720272,
   "end_elevation_m": 217.99710816129178,
   "min_gradient_pct": 1.3065915420673946
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.66123709852718,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 340.0,
   "end_distance_m": 360.0,
   "start_elevation_m": 214.06568109452382,
   "end_elevation_m": 218.19792851422926,
   "min_gradient_pct": 1.7857011625144992
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.610152947551455,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 334.0,
   "end_distance_m": 359.0,
   "start_elevation_m": 212.8445699244039,
   "end_elevation_m": 217.99710816129178,
   "min_gradient_pct": 1.7817254520612096
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.81028757853977,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 325.0,
   "end_distance_m": 375.0,
   "start_elevation_m": 211.14843532683258,
   "end_elevation_m": 221.05357911610247,
   "min_gradient_pct": 2.208621391263705
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.094898419027658,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 294.0,
   "end_distance_m": 394.0,
   "start_elevation_m": 206.14967096777804,
   "end_elevation_m": 224.2445693868057,
   "min_gradient_pct": 2.3490453036380075
  }
 ],
 "shape": {
  "ascent_concentration": 0.43,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 281.0,
  "shape_class": "sustained"
 },
 "length_m": 489.5251961290127,
 "start_elevation_m": 183.6780775013713,
 "end_elevation_m": 233.77737003600026,
 "endpoint_gain_m": 50.09929253462897,
 "overall_gradient_pct": 10.23426228737478,
 "accumulated_ascent_m": 50.09929253462897,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.055573987166554,
   "start_distance_m": 355.0,
   "end_distance_m": 360.0,
   "midpoint_distance_m": 357.5,
   "start_elevation_m": 217.14514981487093,
   "end_elevation_m": 218.19792851422926,
   "start_xy": [
    738582.6910636948,
    4922748.078636423
   ],
   "end_xy": [
    738581.3793479614,
    4922743.253763177
   ]
  },
  "max_10m": {
   "gradient_pct": 20.95176094089055,
   "start_distance_m": 349.0,
   "end_distance_m": 359.0,
   "midpoint_distance_m": 354.0,
   "start_elevation_m": 215.90193206720272,
   "end_elevation_m": 217.99710816129178,
   "start_xy": [
    738584.2651225748,
    4922753.868484317
   ],
   "end_xy": [
    738581.6416911081,
    4922744.218737827
   ]
  },
  "max_20m": {
   "gradient_pct": 20.66123709852718,
   "start_distance_m": 340.0,
   "end_distance_m": 360.0,
   "midpoint_distance_m": 350.0,
   "start_elevation_m": 214.06568109452382,
   "end_elevation_m": 218.19792851422926,
   "start_xy": [
    738586.6262108948,
    4922762.55325616
   ],
   "end_xy": [
    738581.3793479614,
    4922743.253763177
   ]
  },
  "max_25m": {
   "gradient_pct": 20.610152947551455,
   "start_distance_m": 334.0,
   "end_distance_m": 359.0,
   "midpoint_distance_m": 346.5,
   "start_elevation_m": 212.8445699244039,
   "end_elevation_m": 217.99710816129178,
   "start_xy": [
    738588.2002697749,
    4922768.343104054
   ],
   "end_xy": [
    738581.6416911081,
    4922744.218737827
   ]
  },
  "max_50m": {
   "gradient_pct": 19.81028757853977,
   "start_distance_m": 325.0,
   "end_distance_m": 375.0,
   "midpoint_distance_m": 350.0,
   "start_elevation_m": 211.14843532683258,
   "end_elevation_m": 221.05357911610247,
   "start_xy": [
    738590.5613580948,
    4922777.027875896
   ],
   "end_xy": [
    738577.4442007614,
    4922728.7791434415
   ]
  },
  "max_100m": {
   "gradient_pct": 18.094898419027658,
   "start_distance_m": 294.0,
   "end_distance_m": 394.0,
   "midpoint_distance_m": 344.0,
   "start_elevation_m": 206.14967096777804,
   "end_elevation_m": 224.2445693868057,
   "start_xy": [
    738600.0587430046,
    4922806.535729821
   ],
   "end_xy": [
    738572.4596809747,
    4922710.4446251085
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.047375755141502,
   "start_distance_m": 8.0,
   "end_distance_m": 13.0,
   "midpoint_distance_m": 10.5,
   "start_elevation_m": 183.84562880464426,
   "end_elevation_m": 183.89799759240134,
   "start_xy": [
    738495.6833639755,
    4923006.70221793
   ],
   "end_xy": [
    738500.0742164602,
    4923004.310479136
   ]
  },
  "min_10m": {
   "gradient_pct": 1.3065915420673946,
   "start_distance_m": 3.0,
   "end_distance_m": 13.0,
   "midpoint_distance_m": 8.0,
   "start_elevation_m": 183.7673384381946,
   "end_elevation_m": 183.89799759240134,
   "start_xy": [
    738491.2925114909,
    4923009.093956724
   ],
   "end_xy": [
    738500.0742164602,
    4923004.310479136
   ]
  },
  "min_20m": {
   "gradient_pct": 1.7857011625144992,
   "start_distance_m": 56.0,
   "end_distance_m": 76.0,
   "midpoint_distance_m": 66.0,
   "start_elevation_m": 184.93665803041705,
   "end_elevation_m": 185.29379826291995,
   "start_xy": [
    738537.8388583589,
    4922983.7476044
   ],
   "end_xy": [
    738555.4039638323,
    4922974.183762614
   ]
  },
  "min_25m": {
   "gradient_pct": 1.7817254520612096,
   "start_distance_m": 3.0,
   "end_distance_m": 28.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 183.7673384381946,
   "end_elevation_m": 184.2127698012099,
   "start_xy": [
    738491.2925114909,
    4923009.093956724
   ],
   "end_xy": [
    738513.2477106962,
    4922997.1369829
   ]
  },
  "min_50m": {
   "gradient_pct": 2.208621391263705,
   "start_distance_m": 3.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 28.0,
   "start_elevation_m": 183.7673384381946,
   "end_elevation_m": 184.87164913382645,
   "start_xy": [
    738491.2925114909,
    4923009.093956724
   ],
   "end_xy": [
    738535.2040925379,
    4922985.182180668
   ]
  },
  "min_100m": {
   "gradient_pct": 2.3490453036380075,
   "start_distance_m": 2.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 52.0,
   "start_elevation_m": 183.7445551468997,
   "end_elevation_m": 186.0936004505377,
   "start_xy": [
    738490.414340994,
    4923009.572304483
   ],
   "end_xy": [
    738578.2386009477,
    4922961.750768292
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.55589372344906,
   "start_distance_m": 350.0,
   "end_distance_m": 352.0,
   "midpoint_distance_m": 351.0,
   "start_elevation_m": 216.1121482874608,
   "end_elevation_m": 216.54326616192978,
   "start_xy": [
    738584.0027794281,
    4922752.903509669
   ],
   "end_xy": [
    738583.4780931348,
    4922750.9735603705
   ]
  },
  "max_3m": {
   "gradient_pct": 21.428379783580453,
   "start_distance_m": 356.0,
   "end_distance_m": 359.0,
   "midpoint_distance_m": 357.5,
   "start_elevation_m": 217.35425676778436,
   "end_elevation_m": 217.99710816129178,
   "start_xy": [
    738582.4287205482,
    4922747.113661774
   ],
   "end_xy": [
    738581.6416911081,
    4922744.218737827
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.022,
   "obstruction_max_height_m": 8.44,
   "flagged_windows_m": []
  },
  "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/vt/USGS_1M_18_x73y493_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-01T03:14:26+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/vermont-260821.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "vt-260831",
  "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, VT_Statewide_A23 (collected 2023)",
  "elevation_tile_ids": [
   "x73y493"
  ],
  "trimmed_from": "mountain-avenue",
  "trim_cut_m": [
   [
    884.2,
    915.8
   ]
  ],
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/VT_Statewide_2_A23",
   "ept_crs": "EPSG:3857",
   "station_coverage": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "inventory_drain": "inventory-inconclusive",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "St. Johnsbury",
  "county": "Vermont"
 }
}