{
 "ocl_version": "0.1.0",
 "name": "Sears Road",
 "slug": "sears-road-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.164428524274456,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 306.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 174.02424809753555,
   "end_elevation_m": 174.62753666802104,
   "min_gradient_pct": -12.315094654084646,
   "suppressed_max_gradient_pct": 49.24097066013786,
   "suppressed_location_m": [
    113.0,
    115.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.945109577414502,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 305.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 173.7591833806986,
   "end_elevation_m": 174.62753666802104,
   "min_gradient_pct": -10.181739530919268,
   "suppressed_max_gradient_pct": 47.749020335151236,
   "suppressed_location_m": [
    112.0,
    115.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.862197510141073,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 303.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 173.28442679251398,
   "end_elevation_m": 174.62753666802104,
   "min_gradient_pct": -9.662181653823154,
   "suppressed_max_gradient_pct": 44.15329958482914,
   "suppressed_location_m": [
    110.0,
    115.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.07186510917535,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 303.0,
   "end_distance_m": 313.0,
   "start_elevation_m": 173.28442679251398,
   "end_elevation_m": 175.79161330343152,
   "min_gradient_pct": -4.699931021116299,
   "suppressed_max_gradient_pct": 38.61327158763288,
   "suppressed_location_m": [
    106.0,
    116.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.942700525575987,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 302.0,
   "end_distance_m": 322.0,
   "start_elevation_m": 173.07525402893717,
   "end_elevation_m": 177.46379413405236,
   "min_gradient_pct": -1.4163089145401386,
   "suppressed_max_gradient_pct": 28.48692933052888,
   "suppressed_location_m": [
    96.0,
    116.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.026563630111696,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 297.0,
   "end_distance_m": 322.0,
   "start_elevation_m": 172.20715322652444,
   "end_elevation_m": 177.46379413405236,
   "min_gradient_pct": -1.5092321010481555,
   "suppressed_max_gradient_pct": 26.60163860278135,
   "suppressed_location_m": [
    94.0,
    119.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.91549705983971,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 291.0,
   "end_distance_m": 341.0,
   "start_elevation_m": 171.63202788018376,
   "end_elevation_m": 180.0897764101036,
   "min_gradient_pct": 0.555157049241302,
   "suppressed_max_gradient_pct": 19.96000946861261,
   "suppressed_location_m": [
    71.0,
    121.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.084883416674415,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 246.0,
   "end_distance_m": 346.0,
   "start_elevation_m": 166.33710272179144,
   "end_elevation_m": 180.42198613846585,
   "min_gradient_pct": 9.831688993778243,
   "suppressed_max_gradient_pct": 14.640870151230073,
   "suppressed_location_m": [
    73.0,
    173.0
   ],
   "suppressed_min_gradient_pct": 5.885599831338595,
   "suppressed_min_location_m": [
    0.0,
    100.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.379,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 57.0,
  "shape_class": "sustained"
 },
 "length_m": 380.9991094082332,
 "start_elevation_m": 143.4407249388982,
 "end_elevation_m": 181.63026225830617,
 "endpoint_gain_m": 38.189537319407975,
 "overall_gradient_pct": 10.02352403886819,
 "accumulated_ascent_m": 39.83732267807247,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.862197510141073,
   "start_distance_m": 303.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 305.5,
   "start_elevation_m": 173.28442679251398,
   "end_elevation_m": 174.62753666802104,
   "start_xy": [
    715744.5512243559,
    4719416.126093734
   ],
   "end_xy": [
    715739.5871157892,
    4719416.724106854
   ]
  },
  "max_10m": {
   "gradient_pct": 25.07186510917535,
   "start_distance_m": 303.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 308.0,
   "start_elevation_m": 173.28442679251398,
   "end_elevation_m": 175.79161330343152,
   "start_xy": [
    715744.5512243559,
    4719416.126093734
   ],
   "end_xy": [
    715734.6230071046,
    4719417.322119987
   ]
  },
  "max_20m": {
   "gradient_pct": 21.942700525575987,
   "start_distance_m": 302.0,
   "end_distance_m": 322.0,
   "midpoint_distance_m": 312.0,
   "start_elevation_m": 173.07525402893717,
   "end_elevation_m": 177.46379413405236,
   "start_xy": [
    715745.5440015025,
    4719416.006120664
   ],
   "end_xy": [
    715725.6877899297,
    4719418.4000252
   ]
  },
  "max_25m": {
   "gradient_pct": 21.026563630111696,
   "start_distance_m": 297.0,
   "end_distance_m": 322.0,
   "midpoint_distance_m": 309.5,
   "start_elevation_m": 172.20715322652444,
   "end_elevation_m": 177.46379413405236,
   "start_xy": [
    715750.3956959331,
    4719414.798077194
   ],
   "end_xy": [
    715725.6877899297,
    4719418.4000252
   ]
  },
  "max_50m": {
   "gradient_pct": 16.91549705983971,
   "start_distance_m": 291.0,
   "end_distance_m": 341.0,
   "midpoint_distance_m": 316.0,
   "start_elevation_m": 171.63202788018376,
   "end_elevation_m": 180.0897764101036,
   "start_xy": [
    715756.2118742312,
    4719413.324285504
   ],
   "end_xy": [
    715706.8241323744,
    4719420.672103976
   ]
  },
  "max_100m": {
   "gradient_pct": 14.084883416674415,
   "start_distance_m": 246.0,
   "end_distance_m": 346.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 166.33710272179144,
   "end_elevation_m": 180.42198613846585,
   "start_xy": [
    715800.3726534472,
    4719413.751944524
   ],
   "end_xy": [
    715701.8485220878,
    4719421.089991875
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.662181653823154,
   "start_distance_m": 138.0,
   "end_distance_m": 143.0,
   "midpoint_distance_m": 140.5,
   "start_elevation_m": 155.92699658812464,
   "end_elevation_m": 155.44388750543348,
   "start_xy": [
    715904.3953038888,
    4719403.534946319
   ],
   "end_xy": [
    715899.4712268842,
    4719404.4029599205
   ]
  },
  "min_10m": {
   "gradient_pct": -4.699931021116299,
   "start_distance_m": 136.0,
   "end_distance_m": 146.0,
   "midpoint_distance_m": 141.0,
   "start_elevation_m": 155.9143610876328,
   "end_elevation_m": 155.44436798552118,
   "start_xy": [
    715906.3649814127,
    4719403.188003264
   ],
   "end_xy": [
    715896.5109609952,
    4719404.886997144
   ]
  },
  "min_20m": {
   "gradient_pct": -1.4163089145401386,
   "start_distance_m": 45.0,
   "end_distance_m": 65.0,
   "midpoint_distance_m": 55.0,
   "start_elevation_m": 144.88240008209863,
   "end_elevation_m": 144.5991382991906,
   "start_xy": [
    715992.9258576562,
    4719379.618092744
   ],
   "end_xy": [
    715976.1695951074,
    4719390.537231833
   ]
  },
  "min_25m": {
   "gradient_pct": -1.5092321010481555,
   "start_distance_m": 44.0,
   "end_distance_m": 69.0,
   "midpoint_distance_m": 56.5,
   "start_elevation_m": 144.87633489245252,
   "end_elevation_m": 144.49902686719048,
   "start_xy": [
    715993.7637068569,
    4719379.072190997
   ],
   "end_xy": [
    715972.3473228455,
    4719391.554942969
   ]
  },
  "min_50m": {
   "gradient_pct": 0.555157049241302,
   "start_distance_m": 22.0,
   "end_distance_m": 72.0,
   "midpoint_distance_m": 47.0,
   "start_elevation_m": 144.24693281379518,
   "end_elevation_m": 144.52451133841583,
   "start_xy": [
    716012.1948986043,
    4719367.060066064
   ],
   "end_xy": [
    715969.3929233548,
    4719392.076013462
   ]
  },
  "min_100m": {
   "gradient_pct": 9.831688993778243,
   "start_distance_m": 136.0,
   "end_distance_m": 236.0,
   "midpoint_distance_m": 186.0,
   "start_elevation_m": 155.9143610876328,
   "end_elevation_m": 165.74605008141106,
   "start_xy": [
    715906.3649814127,
    4719403.188003264
   ],
   "end_xy": [
    715809.1327851628,
    4719408.9681234015
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.164428524274456,
   "start_distance_m": 306.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 307.0,
   "start_elevation_m": 174.02424809753555,
   "end_elevation_m": 174.62753666802104,
   "start_xy": [
    715741.5727743022,
    4719416.485027302
   ],
   "end_xy": [
    715739.5871157892,
    4719416.724106854
   ]
  },
  "max_3m": {
   "gradient_pct": 28.945109577414502,
   "start_distance_m": 305.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 306.5,
   "start_elevation_m": 173.7591833806986,
   "end_elevation_m": 174.62753666802104,
   "start_xy": [
    715742.5656700234,
    4719416.366039544
   ],
   "end_xy": [
    715739.5871157892,
    4719416.724106854
   ]
  }
 },
 "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": {
  "texture_suppression": {
   "masked_fraction": 0.079,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    100.0
   ],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 94.0,
     "end_m": 119.0,
     "raw_pct": 26.6,
     "reason": "staircase+hump"
    },
    {
     "window_m": 20.0,
     "start_m": 96.0,
     "end_m": 116.0,
     "raw_pct": 28.49,
     "reason": "staircase+hump"
    },
    {
     "window_m": 10.0,
     "start_m": 106.0,
     "end_m": 116.0,
     "raw_pct": 38.61,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 110.0,
     "end_m": 115.0,
     "raw_pct": 44.15,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.249,
   "obstruction_max_height_m": 24.51,
   "flagged_windows_m": [
    100
   ]
  },
  "excluded_ranges_m": [
   [
    92.0,
    121.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "8f4becd2ed8ab26772f5cd961ca7d1d0c2823252",
   "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": "remeasure-valley-260921-us",
   "road_pbf": "batch-usa-ma-chunk000.pbf",
   "region_key": "usa-ma",
   "crs": "EPSG:26918",
   "elevation_provider_key": "usa3dep",
   "authority": "usa-inventory",
   "registry_pbf": "massachusetts-260822.osm.pbf",
   "tile_index_snapshot": "sha256:8940805f1f5a07f6"
  },
  "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ma/USGS_1M_18_x71y472_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-22T00:09:41+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/valley-260921/us/batch-usa-ma-chunk000.pbf",
  "osm_snapshot": "",
  "run_id": "remeasure-valley-260921-us",
  "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, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x71y472"
  ],
  "route_base_cut_m": 307.0,
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_MA_ME_MA_QL2_UTM18_L1_2015_LAS_2018",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.984,
   "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": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked",
  "prior_doc": {
   "slug": "sears-road-2",
   "calculated_at": "2026-09-15T02:22:32+00:00",
   "code_git_sha": null,
   "analysis_version": "0.1.0",
   "run_id": "retro-260914",
   "path": "/root/uk-climbs/output/valley-260921/us/priors/sears-road-2/sears-road-2.json",
   "spans": 7,
   "sources": [
    "excluded_ranges_m",
    "texture"
   ]
  },
  "carriageway": {
   "stations": 22,
   "stations_resolved": 22,
   "width_median_m": 3.25,
   "width_p10_m": 2.0,
   "width_min_m": 2.0,
   "width_max_m": 11.0,
   "bounded_share": 0.409,
   "unbounded_share": 0.591,
   "confidence_median": 0.0,
   "width_median_bounded_m": 2.75,
   "window_m": [
    297.0,
    322.0
   ],
   "width_at_max25_m": 2.0,
   "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)"
   }
  },
  "remeasured": {
   "on": "2026-09-22",
   "why": "valley-crossing extent re-measure 2026-09-22: low-to-summit (307.0 m -> 676.0 m)",
   "published_max25_pct": 21.03,
   "max25_pct": 21.03
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Wendell",
  "county": "Massachusetts"
 }
}