{
 "ocl_version": "0.1.0",
 "name": "Northeast 45th Street",
 "slug": "northeast-45th-street-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.15308640669933,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 187.0,
   "end_distance_m": 189.0,
   "start_elevation_m": 35.27368853295913,
   "end_elevation_m": 35.736750261093114,
   "min_gradient_pct": 0.8536993183005492
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.755239004841837,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 196.0,
   "end_distance_m": 199.0,
   "start_elevation_m": 37.258892393449855,
   "end_elevation_m": 37.94154956359511,
   "min_gradient_pct": 1.0569431363369592
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.708612328844566,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 196.0,
   "end_distance_m": 201.0,
   "start_elevation_m": 37.258892393449855,
   "end_elevation_m": 38.394323009892084,
   "min_gradient_pct": 1.105168061660109
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.45323148632977,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 193.0,
   "end_distance_m": 203.0,
   "start_elevation_m": 36.59512365301559,
   "end_elevation_m": 38.84044680164857,
   "min_gradient_pct": 1.6531898655139798
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.15578999404933,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 184.0,
   "end_distance_m": 204.0,
   "start_elevation_m": 34.61413050436761,
   "end_elevation_m": 39.045288503177474,
   "min_gradient_pct": 1.91399023547417
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.07649787256173,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 178.0,
   "end_distance_m": 203.0,
   "start_elevation_m": 33.321322333508135,
   "end_elevation_m": 38.84044680164857,
   "min_gradient_pct": 2.1140106036280883
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.622264225086486,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 156.0,
   "end_distance_m": 206.0,
   "start_elevation_m": 29.044880346316933,
   "end_elevation_m": 39.35601245886018,
   "min_gradient_pct": 2.5178234965107578
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.623749813651536,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 262.0,
   "start_elevation_m": 29.918305395039418,
   "end_elevation_m": 47.542055208690954,
   "min_gradient_pct": 2.707796877690249
  }
 ],
 "shape": {
  "ascent_concentration": 0.467,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 63.0,
  "shape_class": "stepped"
 },
 "length_m": 274.2266706321749,
 "start_elevation_m": 23.99384575072982,
 "end_elevation_m": 49.8122361917829,
 "endpoint_gain_m": 25.81839044105308,
 "overall_gradient_pct": 9.414981548488312,
 "accumulated_ascent_m": 25.81839044105308,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.708612328844566,
   "start_distance_m": 196.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 198.5,
   "start_elevation_m": 37.258892393449855,
   "end_elevation_m": 38.394323009892084,
   "start_xy": [
    554836.0190968304,
    5278908.258464637
   ],
   "end_xy": [
    554831.0200813586,
    5278908.159246125
   ]
  },
  "max_10m": {
   "gradient_pct": 22.45323148632977,
   "start_distance_m": 193.0,
   "end_distance_m": 203.0,
   "midpoint_distance_m": 198.0,
   "start_elevation_m": 36.59512365301559,
   "end_elevation_m": 38.84044680164857,
   "start_xy": [
    554839.0185061134,
    5278908.317995744
   ],
   "end_xy": [
    554829.02047517,
    5278908.11955872
   ]
  },
  "max_20m": {
   "gradient_pct": 22.15578999404933,
   "start_distance_m": 184.0,
   "end_distance_m": 204.0,
   "midpoint_distance_m": 194.0,
   "start_elevation_m": 34.61413050436761,
   "end_elevation_m": 39.045288503177474,
   "start_xy": [
    554848.0167339626,
    5278908.4965890655
   ],
   "end_xy": [
    554828.0206720756,
    5278908.099715018
   ]
  },
  "max_25m": {
   "gradient_pct": 22.07649787256173,
   "start_distance_m": 178.0,
   "end_distance_m": 203.0,
   "midpoint_distance_m": 190.5,
   "start_elevation_m": 33.321322333508135,
   "end_elevation_m": 38.84044680164857,
   "start_xy": [
    554854.0155525288,
    5278908.61565128
   ],
   "end_xy": [
    554829.02047517,
    5278908.11955872
   ]
  },
  "max_50m": {
   "gradient_pct": 20.622264225086486,
   "start_distance_m": 156.0,
   "end_distance_m": 206.0,
   "midpoint_distance_m": 181.0,
   "start_elevation_m": 29.044880346316933,
   "end_elevation_m": 39.35601245886018,
   "start_xy": [
    554876.0112206045,
    5278909.052212732
   ],
   "end_xy": [
    554826.0210658868,
    5278908.060027613
   ]
  },
  "max_100m": {
   "gradient_pct": 17.623749813651536,
   "start_distance_m": 162.0,
   "end_distance_m": 262.0,
   "midpoint_distance_m": 212.0,
   "start_elevation_m": 29.918305395039418,
   "end_elevation_m": 47.542055208690954,
   "start_xy": [
    554870.0124020383,
    5278908.933150518
   ],
   "end_xy": [
    554770.0259108206,
    5278907.430192708
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.105168061660109,
   "start_distance_m": 127.0,
   "end_distance_m": 132.0,
   "midpoint_distance_m": 129.5,
   "start_elevation_m": 27.655122220971947,
   "end_elevation_m": 27.710380624054952,
   "start_xy": [
    554894.3384773171,
    5278899.548528768
   ],
   "end_xy": [
    554894.7206220934,
    5278904.533903917
   ]
  },
  "min_10m": {
   "gradient_pct": 1.6531898655139798,
   "start_distance_m": 127.0,
   "end_distance_m": 137.0,
   "midpoint_distance_m": 132.0,
   "start_elevation_m": 27.655122220971947,
   "end_elevation_m": 27.820441207523345,
   "start_xy": [
    554894.3384773171,
    5278899.548528768
   ],
   "end_xy": [
    554895.0074793971,
    5278909.4292430775
   ]
  },
  "min_20m": {
   "gradient_pct": 1.91399023547417,
   "start_distance_m": 117.0,
   "end_distance_m": 137.0,
   "midpoint_distance_m": 127.0,
   "start_elevation_m": 27.43764316042851,
   "end_elevation_m": 27.820441207523345,
   "start_xy": [
    554893.5741877645,
    5278889.577778472
   ],
   "end_xy": [
    554895.0074793971,
    5278909.4292430775
   ]
  },
  "min_25m": {
   "gradient_pct": 2.1140106036280883,
   "start_distance_m": 113.0,
   "end_distance_m": 138.0,
   "midpoint_distance_m": 125.5,
   "start_elevation_m": 27.312036641423994,
   "end_elevation_m": 27.840539292331016,
   "start_xy": [
    554893.2684719436,
    5278885.589478353
   ],
   "end_xy": [
    554894.0076763028,
    5278909.409399375
   ]
  },
  "min_50m": {
   "gradient_pct": 2.5178234965107578,
   "start_distance_m": 88.0,
   "end_distance_m": 138.0,
   "midpoint_distance_m": 113.0,
   "start_elevation_m": 26.581627544075637,
   "end_elevation_m": 27.840539292331016,
   "start_xy": [
    554891.3577480622,
    5278860.662602611
   ],
   "end_xy": [
    554894.0076763028,
    5278909.409399375
   ]
  },
  "min_100m": {
   "gradient_pct": 2.707796877690249,
   "start_distance_m": 38.0,
   "end_distance_m": 138.0,
   "midpoint_distance_m": 88.0,
   "start_elevation_m": 25.132742414640767,
   "end_elevation_m": 27.840539292331016,
   "start_xy": [
    554887.5363002996,
    5278810.8088511275
   ],
   "end_xy": [
    554894.0076763028,
    5278909.409399375
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.15308640669933,
   "start_distance_m": 187.0,
   "end_distance_m": 189.0,
   "midpoint_distance_m": 188.0,
   "start_elevation_m": 35.27368853295913,
   "end_elevation_m": 35.736750261093114,
   "start_xy": [
    554845.0173246795,
    5278908.437057958
   ],
   "end_xy": [
    554843.0177184909,
    5278908.397370554
   ]
  },
  "max_3m": {
   "gradient_pct": 22.755239004841837,
   "start_distance_m": 196.0,
   "end_distance_m": 199.0,
   "midpoint_distance_m": 197.5,
   "start_elevation_m": 37.258892393449855,
   "end_elevation_m": 37.94154956359511,
   "start_xy": [
    554836.0190968304,
    5278908.258464637
   ],
   "end_xy": [
    554833.0196875473,
    5278908.19893353
   ]
  }
 },
 "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_continue_beyond_end"
  ]
 },
 "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": "sha256:2303dda3b7b16c1c"
  },
  "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_x55y528_WA_KingCounty_2021_B21.tif"
  ],
  "calculated_at": "2026-09-29T04:14:28+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": [
   "x55y528"
  ],
  "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": 2,
  "carriageway": {
   "stations": 17,
   "stations_resolved": 17,
   "width_median_m": 7.5,
   "width_p10_m": 5.9,
   "width_min_m": 5.75,
   "width_max_m": 12.0,
   "bounded_share": 0.0,
   "unbounded_share": 1.0,
   "confidence_median": 0.0,
   "window_m": [
    178.0,
    203.0
   ],
   "width_at_max25_m": 7.25,
   "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"
 }
}