{
 "ocl_version": "0.1.0",
 "name": "Belvedere Street",
 "slug": "belvedere-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.146703727134764,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1358.0,
   "end_distance_m": 1360.0,
   "start_elevation_m": 223.25587691660135,
   "end_elevation_m": 223.67881099114405,
   "min_gradient_pct": -7.67012419781139
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 20.93401812129514,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1229.0,
   "end_distance_m": 1232.0,
   "start_elevation_m": 199.9946554989432,
   "end_elevation_m": 200.62267604258204,
   "min_gradient_pct": -7.6223887172498435
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 20.657790480308904,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1228.0,
   "end_distance_m": 1233.0,
   "start_elevation_m": 199.79245940854878,
   "end_elevation_m": 200.82534893256422,
   "min_gradient_pct": -7.514831142399885
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.309845760615133,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1223.0,
   "end_distance_m": 1233.0,
   "start_elevation_m": 198.7943643565027,
   "end_elevation_m": 200.82534893256422,
   "min_gradient_pct": -6.282463982638831
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.135403742927025,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1340.0,
   "end_distance_m": 1360.0,
   "start_elevation_m": 219.65173024255864,
   "end_elevation_m": 223.67881099114405,
   "min_gradient_pct": -4.330970023957832
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.079182797524822,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1336.0,
   "end_distance_m": 1361.0,
   "start_elevation_m": 218.8541930562411,
   "end_elevation_m": 223.8739887556223,
   "min_gradient_pct": -3.631537236408917
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.0385418016362,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1310.0,
   "end_distance_m": 1360.0,
   "start_elevation_m": 213.65954009032595,
   "end_elevation_m": 223.67881099114405,
   "min_gradient_pct": -1.6174428705212165
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.15680571966564,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1174.0,
   "end_distance_m": 1274.0,
   "start_elevation_m": 189.65468550101215,
   "end_elevation_m": 208.8114912206778,
   "min_gradient_pct": -1.2868579840118741
  }
 ],
 "shape": {
  "ascent_concentration": 0.37,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 279.0,
  "shape_class": "sustained"
 },
 "length_m": 1494.2223811579759,
 "start_elevation_m": 93.5270453464962,
 "end_elevation_m": 242.2885375976567,
 "endpoint_gain_m": 148.76149225116052,
 "overall_gradient_pct": 9.955779951299819,
 "accumulated_ascent_m": 151.90886632828227,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 20.657790480308904,
   "start_distance_m": 1228.0,
   "end_distance_m": 1233.0,
   "midpoint_distance_m": 1230.5,
   "start_elevation_m": 199.79245940854878,
   "end_elevation_m": 200.82534893256422,
   "start_xy": [
    548538.4773590581,
    4179133.570056684
   ],
   "end_xy": [
    548533.4837637763,
    4179133.3201708244
   ]
  },
  "max_10m": {
   "gradient_pct": 20.309845760615133,
   "start_distance_m": 1223.0,
   "end_distance_m": 1233.0,
   "midpoint_distance_m": 1228.0,
   "start_elevation_m": 198.7943643565027,
   "end_elevation_m": 200.82534893256422,
   "start_xy": [
    548543.463358372,
    4179133.318222443
   ],
   "end_xy": [
    548533.4837637763,
    4179133.3201708244
   ]
  },
  "max_20m": {
   "gradient_pct": 20.135403742927025,
   "start_distance_m": 1340.0,
   "end_distance_m": 1360.0,
   "midpoint_distance_m": 1350.0,
   "start_elevation_m": 219.65173024255864,
   "end_elevation_m": 223.67881099114405,
   "start_xy": [
    548449.3059973067,
    4179080.6890565027
   ],
   "end_xy": [
    548436.3425548607,
    4179065.4591792887
   ]
  },
  "max_25m": {
   "gradient_pct": 20.079182797524822,
   "start_distance_m": 1336.0,
   "end_distance_m": 1361.0,
   "midpoint_distance_m": 1348.5,
   "start_elevation_m": 218.8541930562411,
   "end_elevation_m": 223.8739887556223,
   "start_xy": [
    548451.898685796,
    4179083.735031945
   ],
   "end_xy": [
    548435.6943827386,
    4179064.697685428
   ]
  },
  "max_50m": {
   "gradient_pct": 20.0385418016362,
   "start_distance_m": 1310.0,
   "end_distance_m": 1360.0,
   "midpoint_distance_m": 1335.0,
   "start_elevation_m": 213.65954009032595,
   "end_elevation_m": 223.67881099114405,
   "start_xy": [
    548468.7511609757,
    4179103.5338723236
   ],
   "end_xy": [
    548436.3425548607,
    4179065.4591792887
   ]
  },
  "max_100m": {
   "gradient_pct": 19.15680571966564,
   "start_distance_m": 1174.0,
   "end_distance_m": 1274.0,
   "midpoint_distance_m": 1224.0,
   "start_elevation_m": 189.65468550101215,
   "end_elevation_m": 208.8114912206778,
   "start_xy": [
    548580.8650458055,
    4179103.2946056323
   ],
   "end_xy": [
    548492.6272494554,
    4179129.893038268
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.514831142399885,
   "start_distance_m": 1143.0,
   "end_distance_m": 1148.0,
   "midpoint_distance_m": 1145.5,
   "start_elevation_m": 188.9137851226171,
   "end_elevation_m": 188.5380435654971,
   "start_xy": [
    548608.6933870729,
    4179089.8815449127
   ],
   "end_xy": [
    548604.1420137943,
    4179091.951569376
   ]
  },
  "min_10m": {
   "gradient_pct": -6.282463982638831,
   "start_distance_m": 1143.0,
   "end_distance_m": 1153.0,
   "midpoint_distance_m": 1148.0,
   "start_elevation_m": 188.9137851226171,
   "end_elevation_m": 188.28553872435322,
   "start_xy": [
    548608.6933870729,
    4179089.8815449127
   ],
   "end_xy": [
    548599.5906405158,
    4179094.0215938394
   ]
  },
  "min_20m": {
   "gradient_pct": -4.330970023957832,
   "start_distance_m": 668.0,
   "end_distance_m": 688.0,
   "midpoint_distance_m": 678.0,
   "start_elevation_m": 146.35978688387442,
   "end_elevation_m": 145.49359287908285,
   "start_xy": [
    548739.7304460105,
    4179441.8674449245
   ],
   "end_xy": [
    548756.4362009785,
    4179452.2309371694
   ]
  },
  "min_25m": {
   "gradient_pct": -3.631537236408917,
   "start_distance_m": 664.0,
   "end_distance_m": 689.0,
   "midpoint_distance_m": 676.5,
   "start_elevation_m": 146.37642969073525,
   "end_elevation_m": 145.46854538163302,
   "start_xy": [
    548735.7444105264,
    4179441.53349791
   ],
   "end_xy": [
    548757.0081170606,
    4179452.6896490473
   ]
  },
  "min_50m": {
   "gradient_pct": -1.6174428705212165,
   "start_distance_m": 124.0,
   "end_distance_m": 174.0,
   "midpoint_distance_m": 149.0,
   "start_elevation_m": 102.20966109899922,
   "end_elevation_m": 101.40093966373861,
   "start_xy": [
    548579.3328194323,
    4179884.9035749654
   ],
   "end_xy": [
    548587.3256887693,
    4179835.5466436283
   ]
  },
  "min_100m": {
   "gradient_pct": -1.2868579840118741,
   "start_distance_m": 119.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 169.0,
   "start_elevation_m": 102.17566760249785,
   "end_elevation_m": 100.88880961848598,
   "start_xy": [
    548578.5009726613,
    4179889.8338924954
   ],
   "end_xy": [
    548594.502911289,
    4179791.1226929417
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.146703727134764,
   "start_distance_m": 1358.0,
   "end_distance_m": 1360.0,
   "midpoint_distance_m": 1359.0,
   "start_elevation_m": 223.25587691660135,
   "end_elevation_m": 223.67881099114405,
   "start_xy": [
    548437.6388991054,
    4179066.98216701
   ],
   "end_xy": [
    548436.3425548607,
    4179065.4591792887
   ]
  },
  "max_3m": {
   "gradient_pct": 20.93401812129514,
   "start_distance_m": 1229.0,
   "end_distance_m": 1232.0,
   "midpoint_distance_m": 1230.5,
   "start_elevation_m": 199.9946554989432,
   "end_elevation_m": 200.62267604258204,
   "start_xy": [
    548537.4785177325,
    4179133.521931782
   ],
   "end_xy": [
    548534.4819937556,
    4179133.3775570765
   ]
  }
 },
 "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": 0.096,
   "obstruction_max_height_m": 20.48,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "bef8f0c688e0409eaf74fa4b531091cae7766c61",
   "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-sf-eastbay",
   "road_pbf": "us-west-sf-eastbay-block-batch-us-west-sf-eastbay.osm.pbf",
   "region_key": "usa-ca",
   "crs": "EPSG:26910",
   "elevation_provider_key": "usa3dep",
   "authority": "usa-inventory",
   "registry_pbf": "california-2026-09-29.osm.pbf",
   "tile_index_snapshot": "sha256:3e06ad0d5e78884c"
  },
  "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/ca/USGS_1M_10_x54y418_CA_SanFrancisco_B23.tif"
  ],
  "calculated_at": "2026-09-29T07:28:39+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/us-west-sf-eastbay-block-batch-us-west-sf-eastbay.osm.pbf",
  "osm_snapshot": "",
  "run_id": "us-west-sf-eastbay",
  "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, CA_SanFrancisco_B23 (collected 2023)",
  "elevation_tile_ids": [
   "x54y418"
  ],
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/CA_SanFrancisco_1_B23",
   "ept_crs": "EPSG:3857",
   "station_coverage": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0,
   "window_coverage": {
    "5": 1.0,
    "10": 1.0,
    "20": 1.0,
    "25": 1.0
   }
  },
  "structure_own_ways": 9,
  "carriageway": {
   "stations": 66,
   "stations_resolved": 66,
   "width_median_m": 11.5,
   "width_p10_m": 9.12,
   "width_min_m": 7.25,
   "width_max_m": 12.0,
   "bounded_share": 0.0,
   "unbounded_share": 1.0,
   "confidence_median": 0.0,
   "window_m": [
    1336.0,
    1361.0
   ],
   "width_at_max25_m": 10.75,
   "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": "Western Addition-Buena Vista-Eureka Valley",
  "county": "California"
 }
}