{
 "ocl_version": "0.1.0",
 "name": "West Dravus Street",
 "slug": "west-dravus-street-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.352423388477206,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 623.0,
   "end_distance_m": 625.0,
   "start_elevation_m": 100.54786969578855,
   "end_elevation_m": 101.0149181635581,
   "min_gradient_pct": -0.6949953894363148
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.163507644710535,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 626.0,
   "end_distance_m": 629.0,
   "start_elevation_m": 101.23804418066754,
   "end_elevation_m": 101.93294941000886,
   "min_gradient_pct": -0.30014921959301927
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.990852280685203,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 624.0,
   "end_distance_m": 629.0,
   "start_elevation_m": 100.7834067959746,
   "end_elevation_m": 101.93294941000886,
   "min_gradient_pct": 0.33736455150830125
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.95413332280603,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 622.0,
   "end_distance_m": 632.0,
   "start_elevation_m": 100.32268465817343,
   "end_elevation_m": 102.61809799045403,
   "min_gradient_pct": 0.5563974056272514
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.676271232344334,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 612.0,
   "end_distance_m": 632.0,
   "start_elevation_m": 98.08284374398517,
   "end_elevation_m": 102.61809799045403,
   "min_gradient_pct": 1.5864700008977195
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.58296788676108,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 608.0,
   "end_distance_m": 633.0,
   "start_elevation_m": 97.19374048028335,
   "end_elevation_m": 102.83948245197362,
   "min_gradient_pct": 1.9753481633230194
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.076317730660094,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 490.0,
   "end_distance_m": 540.0,
   "start_elevation_m": 73.25127429787952,
   "end_elevation_m": 84.28943316320957,
   "min_gradient_pct": 2.7333635984428497
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.466552481242886,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 487.0,
   "end_distance_m": 587.0,
   "start_elevation_m": 72.66813135954871,
   "end_elevation_m": 93.1346838407916,
   "min_gradient_pct": 3.0204643176785595
  }
 ],
 "shape": {
  "ascent_concentration": 0.387,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 170.0,
  "shape_class": "sustained"
 },
 "length_m": 807.025023070331,
 "start_elevation_m": 16.961332527124476,
 "end_elevation_m": 111.16921284411633,
 "endpoint_gain_m": 94.20788031699186,
 "overall_gradient_pct": 11.673476983226305,
 "accumulated_ascent_m": 94.23236878020577,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.990852280685203,
   "start_distance_m": 624.0,
   "end_distance_m": 629.0,
   "midpoint_distance_m": 626.5,
   "start_elevation_m": 100.7834067959746,
   "end_elevation_m": 101.93294941000886,
   "start_xy": [
    545772.6148338121,
    5277437.783357022
   ],
   "end_xy": [
    545767.6169437297,
    5277437.638116794
   ]
  },
  "max_10m": {
   "gradient_pct": 22.95413332280603,
   "start_distance_m": 622.0,
   "end_distance_m": 632.0,
   "midpoint_distance_m": 627.0,
   "start_elevation_m": 100.32268465817343,
   "end_elevation_m": 102.61809799045403,
   "start_xy": [
    545774.6139898452,
    5277437.841453114
   ],
   "end_xy": [
    545764.7146680213,
    5277436.993145209
   ]
  },
  "max_20m": {
   "gradient_pct": 22.676271232344334,
   "start_distance_m": 612.0,
   "end_distance_m": 632.0,
   "midpoint_distance_m": 622.0,
   "start_elevation_m": 98.08284374398517,
   "end_elevation_m": 102.61809799045403,
   "start_xy": [
    545784.606876858,
    5277438.095403946
   ],
   "end_xy": [
    545764.7146680213,
    5277436.993145209
   ]
  },
  "max_25m": {
   "gradient_pct": 22.58296788676108,
   "start_distance_m": 608.0,
   "end_distance_m": 633.0,
   "midpoint_distance_m": 620.5,
   "start_elevation_m": 97.19374048028335,
   "end_elevation_m": 102.83948245197362,
   "start_xy": [
    545788.5370513034,
    5277437.351274368
   ],
   "end_xy": [
    545763.7633763154,
    5277436.684852993
   ]
  },
  "max_50m": {
   "gradient_pct": 22.076317730660094,
   "start_distance_m": 490.0,
   "end_distance_m": 540.0,
   "midpoint_distance_m": 515.0,
   "start_elevation_m": 73.25127429787952,
   "end_elevation_m": 84.28943316320957,
   "start_xy": [
    545901.313647338,
    5277415.027397832
   ],
   "end_xy": [
    545851.3252115605,
    5277413.9521117
   ]
  },
  "max_100m": {
   "gradient_pct": 20.466552481242886,
   "start_distance_m": 487.0,
   "end_distance_m": 587.0,
   "midpoint_distance_m": 537.0,
   "start_elevation_m": 72.66813135954871,
   "end_elevation_m": 93.1346838407916,
   "start_xy": [
    545904.3129447734,
    5277415.092320045
   ],
   "end_xy": [
    545808.7158378272,
    5277431.752560541
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.33736455150830125,
   "start_distance_m": 802.0,
   "end_distance_m": 807.0,
   "midpoint_distance_m": 804.5,
   "start_elevation_m": 111.15272650986343,
   "end_elevation_m": 111.16959473743884,
   "start_xy": [
    545595.671595598,
    5277427.612766965
   ],
   "end_xy": [
    545590.673015962,
    5277427.493596402
   ]
  },
  "min_10m": {
   "gradient_pct": 0.5563974056272514,
   "start_distance_m": 797.0,
   "end_distance_m": 807.0,
   "midpoint_distance_m": 802.0,
   "start_elevation_m": 111.11395499687612,
   "end_elevation_m": 111.16959473743884,
   "start_xy": [
    545600.6701692608,
    5277427.732187526
   ],
   "end_xy": [
    545590.673015962,
    5277427.493596402
   ]
  },
  "min_20m": {
   "gradient_pct": 1.5864700008977195,
   "start_distance_m": 694.0,
   "end_distance_m": 714.0,
   "midpoint_distance_m": 704.0,
   "start_elevation_m": 107.94008152864049,
   "end_elevation_m": 108.25737552882003,
   "start_xy": [
    545703.6454921057,
    5277429.283434388
   ],
   "end_xy": [
    545683.6576727587,
    5277428.737161556
   ]
  },
  "min_25m": {
   "gradient_pct": 1.9753481633230194,
   "start_distance_m": 694.0,
   "end_distance_m": 719.0,
   "midpoint_distance_m": 706.5,
   "start_elevation_m": 107.94008152864049,
   "end_elevation_m": 108.43391856947125,
   "start_xy": [
    545703.6454921057,
    5277429.283434388
   ],
   "end_xy": [
    545678.6577611845,
    5277428.709770672
   ]
  },
  "min_50m": {
   "gradient_pct": 2.7333635984428497,
   "start_distance_m": 694.0,
   "end_distance_m": 744.0,
   "midpoint_distance_m": 719.0,
   "start_elevation_m": 107.94008152864049,
   "end_elevation_m": 109.30676332786192,
   "start_xy": [
    545703.6454921057,
    5277429.283434388
   ],
   "end_xy": [
    545653.6577979885,
    5277428.752205033
   ]
  },
  "min_100m": {
   "gradient_pct": 3.0204643176785595,
   "start_distance_m": 707.0,
   "end_distance_m": 807.0,
   "midpoint_distance_m": 757.0,
   "start_elevation_m": 108.14913041976028,
   "end_elevation_m": 111.16959473743884,
   "start_xy": [
    545690.6575722097,
    5277428.774396742
   ],
   "end_xy": [
    545590.673015962,
    5277427.493596402
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.352423388477206,
   "start_distance_m": 623.0,
   "end_distance_m": 625.0,
   "midpoint_distance_m": 624.0,
   "start_elevation_m": 100.54786969578855,
   "end_elevation_m": 101.0149181635581,
   "start_xy": [
    545773.6144118287,
    5277437.8124050675
   ],
   "end_xy": [
    545771.6152557957,
    5277437.754308976
   ]
  },
  "max_3m": {
   "gradient_pct": 23.163507644710535,
   "start_distance_m": 626.0,
   "end_distance_m": 629.0,
   "midpoint_distance_m": 627.5,
   "start_elevation_m": 101.23804418066754,
   "end_elevation_m": 101.93294941000886,
   "start_xy": [
    545770.6156777792,
    5277437.725260931
   ],
   "end_xy": [
    545767.6169437297,
    5277437.638116794
   ]
  }
 },
 "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"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "df76949036663033d9910b89cee4f0cc7be92656",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:8c94015b54267da4",
   "python": "3.14.4",
   "numpy": "2.5.3",
   "rasterio": "1.5.1",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.1.2",
   "pyosmium": "4.3.1",
   "libosmium": "2.23.1",
   "gdal": "3.12.4",
   "proj": "9.8.1",
   "run_id": "us-west-seattle",
   "road_pbf": "block-batch-us-west-seattle.osm.pbf",
   "region_key": "usa-wa",
   "crs": "EPSG:26910",
   "elevation_provider_key": "usa3dep",
   "authority": "usa-inventory",
   "registry_pbf": "washington-2026-09-29.osm.pbf",
   "tile_index_snapshot": "sha256:b32ebd10ce2918c9"
  },
  "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:26910",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/wa/USGS_1M_10_x54y528_WA_KingCounty_2021_B21.tif"
  ],
  "calculated_at": "2026-09-29T04:14:46+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-us-west-seattle.osm.pbf",
  "osm_snapshot": "",
  "run_id": "us-west-seattle",
  "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, WA_KingCounty_2021_B21 (collected 2021)",
  "elevation_tile_ids": [
   "x54y528"
  ],
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 39,
   "stations_resolved": 39,
   "width_median_m": 9.0,
   "width_p10_m": 7.35,
   "width_min_m": 5.5,
   "width_max_m": 12.0,
   "bounded_share": 0.0,
   "unbounded_share": 1.0,
   "confidence_median": 0.0,
   "window_m": [
    608.0,
    633.0
   ],
   "width_at_max25_m": 8.75,
   "window_stations": 7,
   "single_track": false,
   "single_track_rule": "PROVISIONAL (2026-09-15): width_p10_m <= 3.0 m with bounded_share >= 0.6; recorded, not a rule",
   "status": "ok",
   "source": "dtm",
   "station_m": 25.0,
   "window_station_m": 5.0,
   "halfwidth_m": 6.0,
   "step_m": 0.25,
   "level_tol_m": 0.12,
   "break_min_m": 0.3,
   "stations_failed": 0,
   "hedge_to_hedge": {
    "status": "unavailable \u2014 no DSM raster (surface model absent or point-cloud only, which cannot serve off-line samples)"
   }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Seattle",
  "county": "Washington"
 }
}