{
 "ocl_version": "0.1.0",
 "name": "Goodspeed Highway (Cheat Neck)",
 "slug": "discovered-lane-39-6625-79-8196",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 39.70656623515083,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 275.0,
   "end_distance_m": 277.0,
   "start_elevation_m": 536.9810957793292,
   "end_elevation_m": 537.7752271040322,
   "min_gradient_pct": -10.427089054235239
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.569824959063226,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 275.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 536.9810957793292,
   "end_elevation_m": 538.1381905281011,
   "min_gradient_pct": -5.577428669569902
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.89058514500948,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 273.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 536.3436612708506,
   "end_elevation_m": 538.1381905281011,
   "min_gradient_pct": -3.3213827897293413
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 33.81448138489759,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 268.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 534.7567423896113,
   "end_elevation_m": 538.1381905281011,
   "min_gradient_pct": -0.05578847376114027
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 30.881056986506223,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 258.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 531.9619791307998,
   "end_elevation_m": 538.1381905281011,
   "min_gradient_pct": 2.3187640669615917
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 28.96921641635481,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 253.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 530.8958864240124,
   "end_elevation_m": 538.1381905281011,
   "min_gradient_pct": 2.4299613141554346
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.8436076968203,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 228.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 526.7163866796909,
   "end_elevation_m": 538.1381905281011,
   "min_gradient_pct": 2.658203607527639
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.076930733629638,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 224.0,
   "end_distance_m": 324.0,
   "start_elevation_m": 526.199032513726,
   "end_elevation_m": 545.2759632473557,
   "min_gradient_pct": 3.548037721071637
  }
 ],
 "shape": {
  "ascent_concentration": 0.477,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 118.0,
  "shape_class": "stepped"
 },
 "length_m": 405.28962396869224,
 "start_elevation_m": 510.1698404113548,
 "end_elevation_m": 550.6888636484374,
 "endpoint_gain_m": 40.51902323708259,
 "overall_gradient_pct": 9.997547640206205,
 "accumulated_ascent_m": 40.94006235815067,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 35.89058514500948,
   "start_distance_m": 273.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 275.5,
   "start_elevation_m": 536.3436612708506,
   "end_elevation_m": 538.1381905281011,
   "start_xy": [
    601217.4983430663,
    4391022.2811522605
   ],
   "end_xy": [
    601217.4885513232,
    4391027.2811426725
   ]
  },
  "max_10m": {
   "gradient_pct": 33.81448138489759,
   "start_distance_m": 268.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 273.0,
   "start_elevation_m": 534.7567423896113,
   "end_elevation_m": 538.1381905281011,
   "start_xy": [
    601217.5219489099,
    4391017.282589784
   ],
   "end_xy": [
    601217.4885513232,
    4391027.2811426725
   ]
  },
  "max_20m": {
   "gradient_pct": 30.881056986506223,
   "start_distance_m": 258.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 268.0,
   "start_elevation_m": 531.9619791307998,
   "end_elevation_m": 538.1381905281011,
   "start_xy": [
    601219.5482791865,
    4391007.490042332
   ],
   "end_xy": [
    601217.4885513232,
    4391027.2811426725
   ]
  },
  "max_25m": {
   "gradient_pct": 28.96921641635481,
   "start_distance_m": 253.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 265.5,
   "start_elevation_m": 530.8958864240124,
   "end_elevation_m": 538.1381905281011,
   "start_xy": [
    601221.8143816281,
    4391003.070662434
   ],
   "end_xy": [
    601217.4885513232,
    4391027.2811426725
   ]
  },
  "max_50m": {
   "gradient_pct": 22.8436076968203,
   "start_distance_m": 228.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 526.7163866796909,
   "end_elevation_m": 538.1381905281011,
   "start_xy": [
    601240.2445299507,
    4390986.440019595
   ],
   "end_xy": [
    601217.4885513232,
    4391027.2811426725
   ]
  },
  "max_100m": {
   "gradient_pct": 19.076930733629638,
   "start_distance_m": 224.0,
   "end_distance_m": 324.0,
   "midpoint_distance_m": 274.0,
   "start_elevation_m": 526.199032513726,
   "end_elevation_m": 545.2759632473557,
   "start_xy": [
    601243.3308057411,
    4390983.895436772
   ],
   "end_xy": [
    601224.4755798524,
    4391072.28520517
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.3213827897293413,
   "start_distance_m": 397.0,
   "end_distance_m": 402.0,
   "midpoint_distance_m": 399.5,
   "start_elevation_m": 550.7857906801256,
   "end_elevation_m": 550.6197215406391,
   "start_xy": [
    601235.4232870139,
    4391144.396820139
   ],
   "end_xy": [
    601236.1095141518,
    4391149.349505504
   ]
  },
  "min_10m": {
   "gradient_pct": -0.05578847376114027,
   "start_distance_m": 392.0,
   "end_distance_m": 402.0,
   "midpoint_distance_m": 397.0,
   "start_elevation_m": 550.6253003880153,
   "end_elevation_m": 550.6197215406391,
   "start_xy": [
    601234.737059876,
    4391139.444134776
   ],
   "end_xy": [
    601236.1095141518,
    4391149.349505504
   ]
  },
  "min_20m": {
   "gradient_pct": 2.3187640669615917,
   "start_distance_m": 3.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 13.0,
   "start_elevation_m": 510.32464038894614,
   "end_elevation_m": 510.78839320233845,
   "start_xy": [
    601107.796807368,
    4390860.501224687
   ],
   "end_xy": [
    601107.1088564881,
    4390880.489389275
   ]
  },
  "min_25m": {
   "gradient_pct": 2.4299613141554346,
   "start_distance_m": 35.0,
   "end_distance_m": 60.0,
   "midpoint_distance_m": 47.5,
   "start_elevation_m": 511.26160026553464,
   "end_elevation_m": 511.8690905940735,
   "start_xy": [
    601110.32343519,
    4390891.57911839
   ],
   "end_xy": [
    601130.0065388113,
    4390906.89863024
   ]
  },
  "min_50m": {
   "gradient_pct": 2.658203607527639,
   "start_distance_m": 7.0,
   "end_distance_m": 57.0,
   "midpoint_distance_m": 32.0,
   "start_elevation_m": 510.4646816700118,
   "end_elevation_m": 511.79378347377565,
   "start_xy": [
    601107.6592171921,
    4390864.498857605
   ],
   "end_xy": [
    601127.4279028494,
    4390905.3654516535
   ]
  },
  "min_100m": {
   "gradient_pct": 3.548037721071637,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 510.1698404113548,
   "end_elevation_m": 513.7178781324264,
   "start_xy": [
    601107.9,
    4390857.503
   ],
   "end_xy": [
    601165.4347371487,
    4390925.1303062355
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 39.70656623515083,
   "start_distance_m": 275.0,
   "end_distance_m": 277.0,
   "midpoint_distance_m": 276.0,
   "start_elevation_m": 536.9810957793292,
   "end_elevation_m": 537.7752271040322,
   "start_xy": [
    601217.4944263691,
    4391024.281148425
   ],
   "end_xy": [
    601217.4905096719,
    4391026.28114459
   ]
  },
  "max_3m": {
   "gradient_pct": 38.569824959063226,
   "start_distance_m": 275.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 276.5,
   "start_elevation_m": 536.9810957793292,
   "end_elevation_m": 538.1381905281011,
   "start_xy": [
    601217.4944263691,
    4391024.281148425
   ],
   "end_xy": [
    601217.4885513232,
    4391027.2811426725
   ]
  }
 },
 "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": 0.6,
   "obstruction_max_height_m": 31.18,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [],
  "lateral_stability": {
   "offsets_m": [
    -1.0,
    -0.5,
    0.0,
    0.5,
    1.0
   ],
   "windows": [
    {
     "window_m": 5,
     "min_pct": 32.22,
     "max_pct": 39.91
    },
    {
     "window_m": 10,
     "min_pct": 30.0,
     "max_pct": 33.88
    },
    {
     "window_m": 25,
     "min_pct": 26.34,
     "max_pct": 29.15
    }
   ]
  }
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "86555f202930aae0c26212a7f06991f3f172f836",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:cadd8ced0d561e22",
   "python": "3.14.4",
   "numpy": "2.5.4",
   "rasterio": "1.5.2",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.2.0",
   "pyosmium": "4.3.2",
   "libosmium": "2.23.1",
   "gdal": "3.12.2",
   "proj": "9.8.1",
   "run_id": "us-wv-run1",
   "road_pbf": "west-virginia-2026-10-31-batch-us-wv-run1.osm.pbf",
   "region_key": "usa-wv",
   "crs": "EPSG:26917",
   "elevation_provider_key": "usa3dep",
   "authority": "usa-inventory",
   "registry_pbf": "west-virginia-2026-10-31.osm.pbf",
   "tile_index_snapshot": "sha256:fc7dfe76ef2a15a9"
  },
  "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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/wv/USGS_1M_17_x60y440_WV_FEMAR3_Southcentral_2018_D19.tif"
  ],
  "calculated_at": "2026-11-02T08:47:45+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/west-virginia-2026-10-31-batch-us-wv-run1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "us-wv-run1",
  "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, WV_FEMAR3_Southcentral_2018_D19 (collected 2018-11..2020-03)",
  "elevation_tile_ids": [
   "x60y440"
  ],
  "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/WV_FEMAR3_Southcentral_B2_2018",
   "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": 1,
  "tunnel_check": "osm tunnel=* ways on 1 own way(s)",
  "tunnel_ranges_m": [],
  "underground_fraction": 0.0,
  "carriageway": {
   "stations": 23,
   "stations_resolved": 23,
   "width_median_m": 3.75,
   "width_p10_m": 2.05,
   "width_min_m": 1.5,
   "width_max_m": 12.0,
   "bounded_share": 0.13,
   "unbounded_share": 0.87,
   "confidence_median": 0.0,
   "width_median_bounded_m": 2.75,
   "window_m": [
    253.0,
    278.0
   ],
   "width_at_max25_m": 2.25,
   "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)"
   }
  },
  "naming_note": "birth-named at adoption (named from its own OSM street ('Goodspeed Highway'), anchored to 'Cheat Neck')",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Eastern",
  "county": "West Virginia"
 }
}