{
 "ocl_version": "0.1.0",
 "name": "Northwest Brynwood Lane",
 "slug": "northwest-brynwood-lane",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.32435350274284,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 303.0,
   "end_distance_m": 305.0,
   "start_elevation_m": 298.87282624723815,
   "end_elevation_m": 299.679313317293,
   "min_gradient_pct": -5.634280630968647
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.94170075424768,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 303.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 298.87282624723815,
   "end_elevation_m": 300.0410772698656,
   "min_gradient_pct": -5.370124635629736
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 36.630760682994605,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 301.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 298.20953923571585,
   "end_elevation_m": 300.0410772698656,
   "min_gradient_pct": -1.8929256541241557
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.082118972338776,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 296.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 297.0328653726317,
   "end_elevation_m": 300.0410772698656,
   "min_gradient_pct": 2.3652111156113165
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 28.526583651875228,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 301.0,
   "end_distance_m": 321.0,
   "start_elevation_m": 298.20953923571585,
   "end_elevation_m": 303.9148559660909,
   "min_gradient_pct": 4.833309643753125
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 28.1211710998748,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 301.0,
   "end_distance_m": 326.0,
   "start_elevation_m": 298.20953923571585,
   "end_elevation_m": 305.23983201068455,
   "min_gradient_pct": 5.23387582215787
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 26.528831292375344,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 300.0,
   "end_distance_m": 350.0,
   "start_elevation_m": 297.96271789658067,
   "end_elevation_m": 311.22713354276834,
   "min_gradient_pct": 5.885783283294586
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 26.411516828923997,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 300.0,
   "end_distance_m": 400.0,
   "start_elevation_m": 297.96271789658067,
   "end_elevation_m": 324.37423472550466,
   "min_gradient_pct": 6.433922801887832
  }
 ],
 "shape": {
  "ascent_concentration": 0.359,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 420.0,
  "shape_class": "sustained"
 },
 "length_m": 725.4999999999193,
 "start_elevation_m": 241.49587064606231,
 "end_elevation_m": 366.7933799057664,
 "endpoint_gain_m": 125.2975092597041,
 "overall_gradient_pct": 17.270504377631706,
 "accumulated_ascent_m": 125.51021817151863,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 36.630760682994605,
   "start_distance_m": 301.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 303.5,
   "start_elevation_m": 298.20953923571585,
   "end_elevation_m": 300.0410772698656,
   "start_xy": [
    518982.07048808126,
    5041285.944814327
   ],
   "end_xy": [
    518987.0332628171,
    5041286.553802768
   ]
  },
  "max_10m": {
   "gradient_pct": 30.082118972338776,
   "start_distance_m": 296.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 301.0,
   "start_elevation_m": 297.0328653726317,
   "end_elevation_m": 300.0410772698656,
   "start_xy": [
    518977.11829729535,
    5041285.259632732
   ],
   "end_xy": [
    518987.0332628171,
    5041286.553802768
   ]
  },
  "max_20m": {
   "gradient_pct": 28.526583651875228,
   "start_distance_m": 301.0,
   "end_distance_m": 321.0,
   "midpoint_distance_m": 311.0,
   "start_elevation_m": 298.20953923571585,
   "end_elevation_m": 303.9148559660909,
   "start_xy": [
    518982.07048808126,
    5041285.944814327
   ],
   "end_xy": [
    519001.9674083623,
    5041287.891424377
   ]
  },
  "max_25m": {
   "gradient_pct": 28.1211710998748,
   "start_distance_m": 301.0,
   "end_distance_m": 326.0,
   "midpoint_distance_m": 313.5,
   "start_elevation_m": 298.20953923571585,
   "end_elevation_m": 305.23983201068455,
   "start_xy": [
    518982.07048808126,
    5041285.944814327
   ],
   "end_xy": [
    519006.9569689685,
    5041288.214356191
   ]
  },
  "max_50m": {
   "gradient_pct": 26.528831292375344,
   "start_distance_m": 300.0,
   "end_distance_m": 350.0,
   "midpoint_distance_m": 325.0,
   "start_elevation_m": 297.96271789658067,
   "end_elevation_m": 311.22713354276834,
   "start_xy": [
    518981.0779331341,
    5041285.823016639
   ],
   "end_xy": [
    519030.9068598784,
    5041289.7644289015
   ]
  },
  "max_100m": {
   "gradient_pct": 26.411516828923997,
   "start_distance_m": 300.0,
   "end_distance_m": 400.0,
   "midpoint_distance_m": 350.0,
   "start_elevation_m": 297.96271789658067,
   "end_elevation_m": 324.37423472550466,
   "start_xy": [
    518981.0779331341,
    5041285.823016639
   ],
   "end_xy": [
    519076.7726806916,
    5041301.730401151
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.8929256541241557,
   "start_distance_m": 561.0,
   "end_distance_m": 566.0,
   "midpoint_distance_m": 563.5,
   "start_elevation_m": 341.49502164374894,
   "end_elevation_m": 341.40037536104273,
   "start_xy": [
    519181.335221375,
    5041296.240307595
   ],
   "end_xy": [
    519181.9152167723,
    5041300.119001714
   ]
  },
  "min_10m": {
   "gradient_pct": 2.3652111156113165,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 241.49587064606231,
   "end_elevation_m": 241.73239175762345,
   "start_xy": [
    518895.08,
    5041046.791
   ],
   "end_xy": [
    518900.144129067,
    5041055.391523843
   ]
  },
  "min_20m": {
   "gradient_pct": 4.833309643753125,
   "start_distance_m": 546.0,
   "end_distance_m": 566.0,
   "midpoint_distance_m": 556.0,
   "start_elevation_m": 340.4337134322921,
   "end_elevation_m": 341.40037536104273,
   "start_xy": [
    519166.75433581806,
    5041299.750768204
   ],
   "end_xy": [
    519181.9152167723,
    5041300.119001714
   ]
  },
  "min_25m": {
   "gradient_pct": 5.23387582215787,
   "start_distance_m": 542.0,
   "end_distance_m": 567.0,
   "midpoint_distance_m": 554.5,
   "start_elevation_m": 340.1622874130275,
   "end_elevation_m": 341.470756368567,
   "start_xy": [
    519162.89984181774,
    5041300.816823963
   ],
   "end_xy": [
    519181.69551787357,
    5041301.094569443
   ]
  },
  "min_50m": {
   "gradient_pct": 5.885783283294586,
   "start_distance_m": 516.0,
   "end_distance_m": 566.0,
   "midpoint_distance_m": 541.0,
   "start_elevation_m": 338.45748371939544,
   "end_elevation_m": 341.40037536104273,
   "start_xy": [
    519138.53022436233,
    5041309.812460586
   ],
   "end_xy": [
    519181.9152167723,
    5041300.119001714
   ]
  },
  "min_100m": {
   "gradient_pct": 6.433922801887832,
   "start_distance_m": 466.0,
   "end_distance_m": 566.0,
   "midpoint_distance_m": 516.0,
   "start_elevation_m": 334.9664525591549,
   "end_elevation_m": 341.40037536104273,
   "start_xy": [
    519095.0989152459,
    5041334.399045757
   ],
   "end_xy": [
    519181.9152167723,
    5041300.119001714
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.32435350274284,
   "start_distance_m": 303.0,
   "end_distance_m": 305.0,
   "midpoint_distance_m": 304.0,
   "start_elevation_m": 298.87282624723815,
   "end_elevation_m": 299.679313317293,
   "start_xy": [
    518984.05559797556,
    5041286.188409703
   ],
   "end_xy": [
    518986.04070786986,
    5041286.432005079
   ]
  },
  "max_3m": {
   "gradient_pct": 38.94170075424768,
   "start_distance_m": 303.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 304.5,
   "start_elevation_m": 298.87282624723815,
   "end_elevation_m": 300.0410772698656,
   "start_xy": [
    518984.05559797556,
    5041286.188409703
   ],
   "end_xy": [
    518987.0332628171,
    5041286.553802768
   ]
  }
 },
 "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",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "22e265d449471caeb15f5f24ffa102fe71905e96",
   "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-portland",
   "road_pbf": "us-west-portland-block-batch-us-west-portland.osm.pbf",
   "region_key": "usa-or",
   "crs": "EPSG:26910",
   "elevation_provider_key": "usa3dep",
   "authority": "usa-inventory",
   "registry_pbf": "oregon-2026-09-29.osm.pbf",
   "tile_index_snapshot": "sha256:14ca93fa9ac00a10"
  },
  "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/or/USGS_1M_10_x51y505_OR_PortlandMetro_B24.tif"
  ],
  "calculated_at": "2026-09-29T09:53:43+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/us-west-portland-block-batch-us-west-portland.osm.pbf",
  "osm_snapshot": "",
  "run_id": "us-west-portland",
  "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, OR_PortlandMetro_B24 (collected 2024)",
  "elevation_tile_ids": [
   "x51y505"
  ],
  "route_cut_m": 725.5,
  "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": 4,
  "carriageway": {
   "stations": 36,
   "stations_resolved": 36,
   "width_median_m": 6.0,
   "width_p10_m": 4.38,
   "width_min_m": 2.75,
   "width_max_m": 12.0,
   "bounded_share": 0.167,
   "unbounded_share": 0.833,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.88,
   "window_m": [
    301.0,
    326.0
   ],
   "width_at_max25_m": 5.25,
   "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": "Portland West",
  "county": "Oregon"
 }
}