{
 "ocl_version": "0.1.0",
 "name": "Lakeside Place Northeast",
 "slug": "northeast-123rd-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.42617855781961,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 93.0,
   "end_distance_m": 95.0,
   "start_elevation_m": 25.694018645136794,
   "end_elevation_m": 26.182542216293186,
   "min_gradient_pct": -1.124323954125117
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.194855891450555,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 89.0,
   "end_distance_m": 92.0,
   "start_elevation_m": 24.84101899071952,
   "end_elevation_m": 25.536864667463036,
   "min_gradient_pct": -0.9448729292344638
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.326571814376166,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 90.0,
   "end_distance_m": 95.0,
   "start_elevation_m": 25.066213625574377,
   "end_elevation_m": 26.182542216293186,
   "min_gradient_pct": -0.8226882140465364
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.474097407144157,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 66.0,
   "end_distance_m": 76.0,
   "start_elevation_m": 20.192114869306444,
   "end_elevation_m": 22.33952461002086,
   "min_gradient_pct": -0.39989974828685604
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.114056800621785,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 80.0,
   "start_elevation_m": 18.927491545578565,
   "end_elevation_m": 23.150302905702922,
   "min_gradient_pct": -0.2499105975120841
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.902457755609035,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 54.0,
   "end_distance_m": 79.0,
   "start_elevation_m": 17.72681915063208,
   "end_elevation_m": 22.952433589534337,
   "min_gradient_pct": -0.14942990381786103
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.42499886629075,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 46.0,
   "end_distance_m": 96.0,
   "start_elevation_m": 16.17303078100762,
   "end_elevation_m": 26.385530214152993,
   "min_gradient_pct": 0.3252585386803162
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.87612503189067,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 15.0,
   "end_distance_m": 115.0,
   "start_elevation_m": 10.819936004037515,
   "end_elevation_m": 28.696061035928185,
   "min_gradient_pct": 5.332403676360286
  }
 ],
 "shape": {
  "ascent_concentration": 0.376,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 119.0,
  "shape_class": "sustained"
 },
 "length_m": 663.0000000000342,
 "start_elevation_m": 9.688394579887994,
 "end_elevation_m": 75.19476431669621,
 "endpoint_gain_m": 65.50636973680821,
 "overall_gradient_pct": 9.880297094540698,
 "accumulated_ascent_m": 65.60732847832432,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.326571814376166,
   "start_distance_m": 90.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 92.5,
   "start_elevation_m": 25.066213625574377,
   "end_elevation_m": 26.182542216293186,
   "start_xy": [
    554065.448128018,
    5284953.337744931
   ],
   "end_xy": [
    554062.1282436594,
    5284957.076510482
   ]
  },
  "max_10m": {
   "gradient_pct": 21.474097407144157,
   "start_distance_m": 66.0,
   "end_distance_m": 76.0,
   "midpoint_distance_m": 71.0,
   "start_elevation_m": 20.192114869306444,
   "end_elevation_m": 22.33952461002086,
   "start_xy": [
    554087.7368835479,
    5284947.116260798
   ],
   "end_xy": [
    554077.833755955,
    5284947.610189488
   ]
  },
  "max_20m": {
   "gradient_pct": 21.114056800621785,
   "start_distance_m": 60.0,
   "end_distance_m": 80.0,
   "midpoint_distance_m": 70.0,
   "start_elevation_m": 18.927491545578565,
   "end_elevation_m": 23.150302905702922,
   "start_xy": [
    554093.3838233824,
    5284948.947371984
   ],
   "end_xy": [
    554073.9733618322,
    5284948.602448915
   ]
  },
  "max_25m": {
   "gradient_pct": 20.902457755609035,
   "start_distance_m": 54.0,
   "end_distance_m": 79.0,
   "midpoint_distance_m": 66.5,
   "start_elevation_m": 17.72681915063208,
   "end_elevation_m": 22.952433589534337,
   "start_xy": [
    554098.7361000906,
    5284951.60515655
   ],
   "end_xy": [
    554074.9092616616,
    5284948.250182667
   ]
  },
  "max_50m": {
   "gradient_pct": 20.42499886629075,
   "start_distance_m": 46.0,
   "end_distance_m": 96.0,
   "midpoint_distance_m": 71.0,
   "start_elevation_m": 16.17303078100762,
   "end_elevation_m": 26.385530214152993,
   "start_xy": [
    554105.3483608733,
    5284956.108267401
   ],
   "end_xy": [
    554061.4642667876,
    5284957.824263592
   ]
  },
  "max_100m": {
   "gradient_pct": 17.87612503189067,
   "start_distance_m": 15.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 65.0,
   "start_elevation_m": 10.819936004037515,
   "end_elevation_m": 28.696061035928185,
   "start_xy": [
    554131.5806890238,
    5284972.594642541
   ],
   "end_xy": [
    554057.8319102293,
    5284976.286800962
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.8226882140465364,
   "start_distance_m": 629.0,
   "end_distance_m": 634.0,
   "midpoint_distance_m": 631.5,
   "start_elevation_m": 75.06222221317256,
   "end_elevation_m": 75.02108780247023,
   "start_xy": [
    553693.0665659037,
    5285137.435496964
   ],
   "end_xy": [
    553688.069443983,
    5285137.265872351
   ]
  },
  "min_10m": {
   "gradient_pct": -0.39989974828685604,
   "start_distance_m": 628.0,
   "end_distance_m": 638.0,
   "midpoint_distance_m": 633.0,
   "start_elevation_m": 75.06651254457135,
   "end_elevation_m": 75.02652256974267,
   "start_xy": [
    553694.0659902879,
    5285137.469421886
   ],
   "end_xy": [
    553684.0717464464,
    5285137.130172661
   ]
  },
  "min_20m": {
   "gradient_pct": -0.2499105975120841,
   "start_distance_m": 615.0,
   "end_distance_m": 635.0,
   "midpoint_distance_m": 625.0,
   "start_elevation_m": 75.06572191381956,
   "end_elevation_m": 75.01573979431714,
   "start_xy": [
    553706.9919093399,
    5285136.154574114
   ],
   "end_xy": [
    553687.0700195988,
    5285137.231947429
   ]
  },
  "min_25m": {
   "gradient_pct": -0.14942990381786103,
   "start_distance_m": 615.0,
   "end_distance_m": 640.0,
   "midpoint_distance_m": 627.5,
   "start_elevation_m": 75.06572191381956,
   "end_elevation_m": 75.0283644378651,
   "start_xy": [
    553706.9919093399,
    5285136.154574114
   ],
   "end_xy": [
    553682.0728976781,
    5285137.062322816
   ]
  },
  "min_50m": {
   "gradient_pct": 0.3252585386803162,
   "start_distance_m": 613.0,
   "end_distance_m": 663.0,
   "midpoint_distance_m": 638.0,
   "start_elevation_m": 75.03213504735605,
   "end_elevation_m": 75.19476431669621,
   "start_xy": [
    553708.9831252489,
    5285135.967333083
   ],
   "end_xy": [
    553659.0860819917,
    5285136.283669659
   ]
  },
  "min_100m": {
   "gradient_pct": 5.332403676360286,
   "start_distance_m": 202.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 252.0,
   "start_elevation_m": 38.04553091241623,
   "end_elevation_m": 43.37793458877652,
   "start_xy": [
    554058.6226138875,
    5285063.264128453
   ],
   "end_xy": [
    553995.4172252307,
    5285137.42540833
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.42617855781961,
   "start_distance_m": 93.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 94.0,
   "start_elevation_m": 25.694018645136794,
   "end_elevation_m": 26.182542216293186,
   "start_xy": [
    554063.4561974028,
    5284955.581004261
   ],
   "end_xy": [
    554062.1282436594,
    5284957.076510482
   ]
  },
  "max_3m": {
   "gradient_pct": 23.194855891450555,
   "start_distance_m": 89.0,
   "end_distance_m": 92.0,
   "midpoint_distance_m": 90.5,
   "start_elevation_m": 24.84101899071952,
   "end_elevation_m": 25.536864667463036,
   "start_xy": [
    554066.1121048896,
    5284952.58999182
   ],
   "end_xy": [
    554064.1201742745,
    5284954.833251151
   ]
  }
 },
 "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": "sha256:026f81f7a4876aa6"
  },
  "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_x55y529_WA_KingCounty_2021_B21.tif"
  ],
  "calculated_at": "2026-09-29T04:16:33+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": [
   "x55y529"
  ],
  "route_summit_trim_m": 202.8,
  "route_summit_trim_loss_m": 8.6,
  "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": 33,
   "stations_resolved": 33,
   "width_median_m": 9.25,
   "width_p10_m": 6.75,
   "width_min_m": 5.0,
   "width_max_m": 12.0,
   "bounded_share": 0.0,
   "unbounded_share": 1.0,
   "confidence_median": 0.0,
   "window_m": [
    54.0,
    79.0
   ],
   "width_at_max25_m": 9.5,
   "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"
 }
}