{
 "ocl_version": "0.1.0",
 "name": "Richardson Street",
 "slug": "richardson-street",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.844327472776342,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 180.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 203.42779129306928,
   "end_elevation_m": 203.9846778425248,
   "min_gradient_pct": -3.2798798290897935
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.809103213941928,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 178.0,
   "end_distance_m": 181.0,
   "start_elevation_m": 202.87853922208726,
   "end_elevation_m": 203.7128123185055,
   "min_gradient_pct": -1.9677604360727703
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.55324697253627,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 178.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 202.87853922208726,
   "end_elevation_m": 204.25620157071407,
   "min_gradient_pct": 0.47768839535763163
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.54821486412061,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 174.0,
   "end_distance_m": 184.0,
   "start_elevation_m": 201.86446152101402,
   "end_elevation_m": 204.51928300742608,
   "min_gradient_pct": 5.0828839661886605
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.712423970467455,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 198.8421930484313,
   "end_elevation_m": 203.9846778425248,
   "min_gradient_pct": 8.121568178492709
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.91997750347673,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 158.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 197.7762071948449,
   "end_elevation_m": 204.25620157071407,
   "min_gradient_pct": 9.046916443108898
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.17672894827643,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 134.0,
   "end_distance_m": 184.0,
   "start_elevation_m": 191.93091853328787,
   "end_elevation_m": 204.51928300742608,
   "min_gradient_pct": 11.804903050406836
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.263776240289303,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 84.0,
   "end_distance_m": 184.0,
   "start_elevation_m": 182.25550676713678,
   "end_elevation_m": 204.51928300742608,
   "min_gradient_pct": 14.772740168367534
  }
 ],
 "shape": {
  "ascent_concentration": 0.34,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 121.0,
  "shape_class": "sustained"
 },
 "length_m": 184.09325949948368,
 "start_elevation_m": 170.52560173216852,
 "end_elevation_m": 204.54531953178102,
 "endpoint_gain_m": 34.01971779961249,
 "overall_gradient_pct": 18.47961076473194,
 "accumulated_ascent_m": 34.08531539619429,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.55324697253627,
   "start_distance_m": 178.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 180.5,
   "start_elevation_m": 202.87853922208726,
   "end_elevation_m": 204.25620157071407,
   "start_xy": [
    693026.5537054826,
    4904086.506005778
   ],
   "end_xy": [
    693029.0493275037,
    4904090.838657475
   ]
  },
  "max_10m": {
   "gradient_pct": 26.54821486412061,
   "start_distance_m": 174.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 179.0,
   "start_elevation_m": 201.86446152101402,
   "end_elevation_m": 204.51928300742608,
   "start_xy": [
    693024.5572078658,
    4904083.03988442
   ],
   "end_xy": [
    693029.5484519078,
    4904091.705187814
   ]
  },
  "max_20m": {
   "gradient_pct": 25.712423970467455,
   "start_distance_m": 162.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 172.0,
   "start_elevation_m": 198.8421930484313,
   "end_elevation_m": 203.9846778425248,
   "start_xy": [
    693018.5677150153,
    4904072.641520347
   ],
   "end_xy": [
    693028.5502030995,
    4904089.972127136
   ]
  },
  "max_25m": {
   "gradient_pct": 25.91997750347673,
   "start_distance_m": 158.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 170.5,
   "start_elevation_m": 197.7762071948449,
   "end_elevation_m": 204.25620157071407,
   "start_xy": [
    693016.5712173985,
    4904069.17539899
   ],
   "end_xy": [
    693029.0493275037,
    4904090.838657475
   ]
  },
  "max_50m": {
   "gradient_pct": 25.17672894827643,
   "start_distance_m": 134.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 159.0,
   "start_elevation_m": 191.93091853328787,
   "end_elevation_m": 204.51928300742608,
   "start_xy": [
    693011.1118031121,
    4904046.037113266
   ],
   "end_xy": [
    693029.5484519078,
    4904091.705187814
   ]
  },
  "max_100m": {
   "gradient_pct": 22.263776240289303,
   "start_distance_m": 84.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 134.0,
   "start_elevation_m": 182.25550676713678,
   "end_elevation_m": 204.51928300742608,
   "start_xy": [
    693000.456191113,
    4903997.245772864
   ],
   "end_xy": [
    693029.5484519078,
    4904091.705187814
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.47768839535763163,
   "start_distance_m": 37.0,
   "end_distance_m": 42.0,
   "midpoint_distance_m": 39.5,
   "start_elevation_m": 176.78937580433447,
   "end_elevation_m": 176.81326022410235,
   "start_xy": [
    693021.2355941224,
    4903969.456053097
   ],
   "end_xy": [
    693017.4688002145,
    4903971.632684891
   ]
  },
  "min_10m": {
   "gradient_pct": 5.0828839661886605,
   "start_distance_m": 37.0,
   "end_distance_m": 47.0,
   "midpoint_distance_m": 42.0,
   "start_elevation_m": 176.78937580433447,
   "end_elevation_m": 177.29766420095334,
   "start_xy": [
    693021.2355941224,
    4903969.456053097
   ],
   "end_xy": [
    693012.7314506343,
    4903973.231909377
   ]
  },
  "min_20m": {
   "gradient_pct": 8.121568178492709,
   "start_distance_m": 36.0,
   "end_distance_m": 56.0,
   "midpoint_distance_m": 46.0,
   "start_elevation_m": 176.68300399491696,
   "end_elevation_m": 178.3073176306155,
   "start_xy": [
    693021.0645667681,
    4903968.470786816
   ],
   "end_xy": [
    693004.2042213901,
    4903976.110513451
   ]
  },
  "min_25m": {
   "gradient_pct": 9.046916443108898,
   "start_distance_m": 37.0,
   "end_distance_m": 62.0,
   "midpoint_distance_m": 49.5,
   "start_elevation_m": 176.78937580433447,
   "end_elevation_m": 179.0511049151117,
   "start_xy": [
    693021.2355941224,
    4903969.456053097
   ],
   "end_xy": [
    692998.519401894,
    4903978.029582834
   ]
  },
  "min_50m": {
   "gradient_pct": 11.804903050406836,
   "start_distance_m": 35.0,
   "end_distance_m": 85.0,
   "midpoint_distance_m": 60.0,
   "start_elevation_m": 176.53551902876998,
   "end_elevation_m": 182.4379705539734,
   "start_xy": [
    693020.8935394137,
    4903967.485520535
   ],
   "end_xy": [
    693000.7164489174,
    4903998.211312027
   ]
  },
  "min_100m": {
   "gradient_pct": 14.772740168367534,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 170.52560173216852,
   "end_elevation_m": 185.29834190053606,
   "start_xy": [
    693010.78,
    4903934.079
   ],
   "end_xy": [
    693004.5230225347,
    4904012.72015422
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.844327472776342,
   "start_distance_m": 180.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 181.0,
   "start_elevation_m": 203.42779129306928,
   "end_elevation_m": 203.9846778425248,
   "start_xy": [
    693027.5519542911,
    4904088.239066457
   ],
   "end_xy": [
    693028.5502030995,
    4904089.972127136
   ]
  },
  "max_3m": {
   "gradient_pct": 27.809103213941928,
   "start_distance_m": 178.0,
   "end_distance_m": 181.0,
   "midpoint_distance_m": 179.5,
   "start_elevation_m": 202.87853922208726,
   "end_elevation_m": 203.7128123185055,
   "start_xy": [
    693026.5537054826,
    4904086.506005778
   ],
   "end_xy": [
    693028.0510786952,
    4904089.105596797
   ]
  }
 },
 "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": 0.102,
   "obstruction_max_height_m": 20.77,
   "flagged_windows_m": [
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "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_x69y491_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T20:28:29+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": "redo-vt-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, VT_Statewide_A23 (collected 2023)",
  "elevation_tile_ids": [
   "x69y491"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 21.5% over 200 m (Terrain 50), gain 25.5 m over 119 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_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
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Montpelier",
  "county": "Vermont"
 }
}