{
 "ocl_version": "0.1.0",
 "name": "Strobridge Hill",
 "slug": "strobridge-hill",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 31.997889580779315,
   "diagnostic": true,
   "flags": [
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 788.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 290.63526772845233,
   "end_elevation_m": 291.2752255200679,
   "min_gradient_pct": -26.86306203100912,
   "suppressed_max_gradient_pct": 37.823131404485366,
   "suppressed_location_m": [
    1703.0,
    1705.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.634674675683375,
   "diagnostic": true,
   "flags": [
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 787.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 290.4461852797974,
   "end_elevation_m": 291.2752255200679,
   "min_gradient_pct": -23.578979569174408,
   "suppressed_max_gradient_pct": 37.8488899943117,
   "suppressed_location_m": [
    1703.0,
    1706.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.906585255520667,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 787.0,
   "end_distance_m": 792.0,
   "start_elevation_m": 290.4461852797974,
   "end_elevation_m": 291.54151454257345,
   "min_gradient_pct": -17.348611188101586,
   "suppressed_max_gradient_pct": 31.563745950060138,
   "suppressed_location_m": [
    1701.0,
    1706.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.412090010724455,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 215.0,
   "end_distance_m": 225.0,
   "start_elevation_m": 260.0315682198891,
   "end_elevation_m": 262.07277722096154,
   "min_gradient_pct": -16.398021265204648,
   "suppressed_max_gradient_pct": 24.8176179534795,
   "suppressed_location_m": [
    1486.0,
    1496.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 19.4676025933407,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 212.0,
   "end_distance_m": 232.0,
   "start_elevation_m": 259.457684267393,
   "end_elevation_m": 263.35120478606115,
   "min_gradient_pct": -10.945393941629504,
   "suppressed_max_gradient_pct": 23.684388086922468,
   "suppressed_location_m": [
    1476.0,
    1496.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 19.678342497801623,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 200.0,
   "end_distance_m": 225.0,
   "start_elevation_m": 257.15319159651114,
   "end_elevation_m": 262.07277722096154,
   "min_gradient_pct": -10.264867616639549,
   "suppressed_max_gradient_pct": 22.97627349384743,
   "suppressed_location_m": [
    1473.0,
    1498.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.86950721778919,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 192.0,
   "end_distance_m": 242.0,
   "start_elevation_m": 255.69919229862694,
   "end_elevation_m": 265.13394590752154,
   "min_gradient_pct": -5.616088891344589,
   "suppressed_max_gradient_pct": 19.64116966773679,
   "suppressed_location_m": [
    1470.0,
    1520.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.526761710978917,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 158.0,
   "end_distance_m": 258.0,
   "start_elevation_m": 250.1505321877995,
   "end_elevation_m": 267.67729389877843,
   "min_gradient_pct": -3.028967049306118
  }
 ],
 "shape": {
  "ascent_concentration": 0.328,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 167.0,
  "shape_class": "sustained"
 },
 "length_m": 2340.9704008480144,
 "start_elevation_m": 235.5063824565368,
 "end_elevation_m": 399.9534279429527,
 "endpoint_gain_m": 164.4470454864159,
 "overall_gradient_pct": 7.024738348970373,
 "accumulated_ascent_m": 179.8508411233031,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.906585255520667,
   "start_distance_m": 787.0,
   "end_distance_m": 792.0,
   "midpoint_distance_m": 789.5,
   "start_elevation_m": 290.4461852797974,
   "end_elevation_m": 291.54151454257345,
   "start_xy": [
    730469.2372332512,
    4911711.108509749
   ],
   "end_xy": [
    730472.2154403258,
    4911715.124761043
   ]
  },
  "max_10m": {
   "gradient_pct": 20.412090010724455,
   "start_distance_m": 215.0,
   "end_distance_m": 225.0,
   "midpoint_distance_m": 220.0,
   "start_elevation_m": 260.0315682198891,
   "end_elevation_m": 262.07277722096154,
   "start_xy": [
    730541.4330652532,
    4911163.69950245
   ],
   "end_xy": [
    730537.93794638,
    4911173.068820691
   ]
  },
  "max_20m": {
   "gradient_pct": 19.4676025933407,
   "start_distance_m": 212.0,
   "end_distance_m": 232.0,
   "midpoint_distance_m": 222.0,
   "start_elevation_m": 259.457684267393,
   "end_elevation_m": 263.35120478606115,
   "start_xy": [
    730542.4810660416,
    4911160.888507504
   ],
   "end_xy": [
    730535.6911940661,
    4911179.693816372
   ]
  },
  "max_25m": {
   "gradient_pct": 19.678342497801623,
   "start_distance_m": 200.0,
   "end_distance_m": 225.0,
   "midpoint_distance_m": 212.5,
   "start_elevation_m": 257.15319159651114,
   "end_elevation_m": 262.07277722096154,
   "start_xy": [
    730546.6760184738,
    4911149.645627686
   ],
   "end_xy": [
    730537.93794638,
    4911173.068820691
   ]
  },
  "max_50m": {
   "gradient_pct": 18.86950721778919,
   "start_distance_m": 192.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 217.0,
   "start_elevation_m": 255.69919229862694,
   "end_elevation_m": 265.13394590752154,
   "start_xy": [
    730549.4721791502,
    4911142.150197532
   ],
   "end_xy": [
    730532.9392287422,
    4911189.307695195
   ]
  },
  "max_100m": {
   "gradient_pct": 17.526761710978917,
   "start_distance_m": 158.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 208.0,
   "start_elevation_m": 250.1505321877995,
   "end_elevation_m": 267.67729389877843,
   "start_xy": [
    730561.3551263564,
    4911110.294345571
   ],
   "end_xy": [
    730531.2274734438,
    4911205.18148119
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -17.348611188101586,
   "start_distance_m": 772.0,
   "end_distance_m": 777.0,
   "midpoint_distance_m": 774.5,
   "start_elevation_m": 291.1641556186287,
   "end_elevation_m": 290.2967250592236,
   "start_xy": [
    730460.3127497742,
    4911699.052249694
   ],
   "end_xy": [
    730463.2835484723,
    4911703.073984801
   ]
  },
  "min_10m": {
   "gradient_pct": -16.398021265204648,
   "start_distance_m": 2291.0,
   "end_distance_m": 2301.0,
   "midpoint_distance_m": 2296.0,
   "start_elevation_m": 398.2646044356153,
   "end_elevation_m": 396.62480230909483,
   "start_xy": [
    731133.3161980095,
    4913048.172903656
   ],
   "end_xy": [
    731139.4941756357,
    4913056.036012701
   ]
  },
  "min_20m": {
   "gradient_pct": -10.945393941629504,
   "start_distance_m": 2284.0,
   "end_distance_m": 2304.0,
   "midpoint_distance_m": 2294.0,
   "start_elevation_m": 398.6570501627882,
   "end_elevation_m": 396.4679713744623,
   "start_xy": [
    731129.0758246299,
    4913042.60341321
   ],
   "end_xy": [
    731141.3540951275,
    4913058.38988158
   ]
  },
  "min_25m": {
   "gradient_pct": -10.264867616639549,
   "start_distance_m": 1015.0,
   "end_distance_m": 1040.0,
   "midpoint_distance_m": 1027.5,
   "start_elevation_m": 311.0558241770641,
   "end_elevation_m": 308.4896072729042,
   "start_xy": [
    730567.407874655,
    4911915.954978903
   ],
   "end_xy": [
    730576.9229571997,
    4911939.0630393755
   ]
  },
  "min_50m": {
   "gradient_pct": -5.616088891344589,
   "start_distance_m": 1010.0,
   "end_distance_m": 1060.0,
   "midpoint_distance_m": 1035.0,
   "start_elevation_m": 311.1854821440745,
   "end_elevation_m": 308.3774376984022,
   "start_xy": [
    730565.3757060543,
    4911911.3865779005
   ],
   "end_xy": [
    730584.0050267542,
    4911957.767163498
   ]
  },
  "min_100m": {
   "gradient_pct": -3.028967049306118,
   "start_distance_m": 2216.0,
   "end_distance_m": 2316.0,
   "midpoint_distance_m": 2266.0,
   "start_elevation_m": 399.5741786434993,
   "end_elevation_m": 396.5452115941932,
   "start_xy": [
    731088.357287672,
    4912988.146715516
   ],
   "end_xy": [
    731148.7970211406,
    4913067.802788023
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 31.997889580779315,
   "start_distance_m": 788.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 789.0,
   "start_elevation_m": 290.63526772845233,
   "end_elevation_m": 291.2752255200679,
   "start_xy": [
    730469.8325940775,
    4911711.911968195
   ],
   "end_xy": [
    730471.0245554603,
    4911713.517965698
   ]
  },
  "max_3m": {
   "gradient_pct": 27.634674675683375,
   "start_distance_m": 787.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 788.5,
   "start_elevation_m": 290.4461852797974,
   "end_elevation_m": 291.2752255200679,
   "start_xy": [
    730469.2372332512,
    4911711.108509749
   ],
   "end_xy": [
    730471.0245554603,
    4911713.517965698
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.088,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.107,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 2,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 1473.0,
     "end_m": 1498.0,
     "raw_pct": 22.98,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 1476.0,
     "end_m": 1496.0,
     "raw_pct": 23.68,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 2318.0,
     "end_m": 2328.0,
     "raw_pct": 23.53,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.636,
   "obstruction_max_height_m": 30.53,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    1471.0,
    1500.0
   ],
   [
    1510.0,
    1550.0
   ],
   [
    1700.0,
    1770.0
   ],
   [
    1800.0,
    1830.0
   ],
   [
    1860.0,
    1890.0
   ],
   [
    2030.0,
    2060.0
   ],
   [
    2316.0,
    2330.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "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/vt/USGS_1M_18_x73y492_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-12T00:21:37+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/vermont-260821.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "texture-us-vt-260911",
  "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, VT_Statewide_A23 (collected 2023)",
  "elevation_tile_ids": [
   "x73y492"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/VT_Statewide_2_A23",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.999,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Barnet",
  "county": "Vermont"
 }
}