{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (42.1836, -72.8299)",
 "slug": "discovered-lane-42-1836-72-8299",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.993675731010796,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 514.0,
   "end_distance_m": 516.0,
   "start_elevation_m": 175.9694951753435,
   "end_elevation_m": 176.6293686899637,
   "min_gradient_pct": -60.825719420617474,
   "suppressed_max_gradient_pct": 90.3425878645919,
   "suppressed_location_m": [
    1429.0,
    1431.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.833357074781436,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 514.0,
   "end_distance_m": 517.0,
   "start_elevation_m": 175.9694951753435,
   "end_elevation_m": 176.83449588758694,
   "min_gradient_pct": -56.6076676457385,
   "suppressed_max_gradient_pct": 84.75411893912603,
   "suppressed_location_m": [
    1428.0,
    1431.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.519560921438256,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 432.0,
   "end_distance_m": 437.0,
   "start_elevation_m": 166.84905884783004,
   "end_elevation_m": 168.12503689390195,
   "min_gradient_pct": -45.00937423122423,
   "suppressed_max_gradient_pct": 71.64457131114204,
   "suppressed_location_m": [
    1427.0,
    1432.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.277471777940434,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 431.0,
   "end_distance_m": 441.0,
   "start_elevation_m": 166.66994947103146,
   "end_elevation_m": 168.8976966488255,
   "min_gradient_pct": -34.32775703726861,
   "suppressed_max_gradient_pct": 42.4991947384666,
   "suppressed_location_m": [
    1423.0,
    1433.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 18.362811376680952,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1841.0,
   "end_distance_m": 1861.0,
   "start_elevation_m": 275.2815407827378,
   "end_elevation_m": 278.954103058074,
   "min_gradient_pct": -23.3006475944768,
   "suppressed_max_gradient_pct": 25.569455074778773,
   "suppressed_location_m": [
    1002.0,
    1022.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 17.16621971994755,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 683.0,
   "end_distance_m": 708.0,
   "start_elevation_m": 201.86538684894475,
   "end_elevation_m": 206.15694177893164,
   "min_gradient_pct": -21.340083172545746,
   "suppressed_max_gradient_pct": 24.576937296905953,
   "suppressed_location_m": [
    995.0,
    1020.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 15.854686957836066,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 348.0,
   "end_distance_m": 398.0,
   "start_elevation_m": 156.43327238635624,
   "end_elevation_m": 164.36061586527427,
   "min_gradient_pct": -15.72940017524445,
   "suppressed_max_gradient_pct": 21.715464555829666,
   "suppressed_location_m": [
    625.0,
    675.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.80909246248555,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 158.0,
   "end_distance_m": 258.0,
   "start_elevation_m": 129.36831684286898,
   "end_elevation_m": 144.17740930535453,
   "min_gradient_pct": -9.355176273126972,
   "suppressed_max_gradient_pct": 17.42739481395097,
   "suppressed_location_m": [
    575.0,
    675.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.399,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 185.0,
  "shape_class": "sustained"
 },
 "length_m": 2135.1325797006734,
 "start_elevation_m": 110.47995551473441,
 "end_elevation_m": 284.8810499902383,
 "endpoint_gain_m": 174.4010944755039,
 "overall_gradient_pct": 8.168162302125209,
 "accumulated_ascent_m": 200.02300663096344,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.519560921438256,
   "start_distance_m": 432.0,
   "end_distance_m": 437.0,
   "midpoint_distance_m": 434.5,
   "start_elevation_m": 166.84905884783004,
   "end_elevation_m": 168.12503689390195,
   "start_xy": [
    679214.5224487351,
    4672518.871989165
   ],
   "end_xy": [
    679210.6726658784,
    4672522.023847404
   ]
  },
  "max_10m": {
   "gradient_pct": 22.277471777940434,
   "start_distance_m": 431.0,
   "end_distance_m": 441.0,
   "midpoint_distance_m": 436.0,
   "start_elevation_m": 166.66994947103146,
   "end_elevation_m": 168.8976966488255,
   "start_xy": [
    679215.2398599582,
    4672518.175339288
   ],
   "end_xy": [
    679207.2426942232,
    4672524.081830391
   ]
  },
  "max_20m": {
   "gradient_pct": 18.362811376680952,
   "start_distance_m": 1841.0,
   "end_distance_m": 1861.0,
   "midpoint_distance_m": 1851.0,
   "start_elevation_m": 275.2815407827378,
   "end_elevation_m": 278.954103058074,
   "start_xy": [
    680241.7058172381,
    4672852.41287073
   ],
   "end_xy": [
    680254.9978016401,
    4672867.347516059
   ]
  },
  "max_25m": {
   "gradient_pct": 17.16621971994755,
   "start_distance_m": 683.0,
   "end_distance_m": 708.0,
   "midpoint_distance_m": 695.5,
   "start_elevation_m": 201.86538684894475,
   "end_elevation_m": 206.15694177893164,
   "start_xy": [
    679236.612127316,
    4672735.096352252
   ],
   "end_xy": [
    679243.7389517216,
    4672758.565146539
   ]
  },
  "max_50m": {
   "gradient_pct": 15.854686957836066,
   "start_distance_m": 348.0,
   "end_distance_m": 398.0,
   "midpoint_distance_m": 373.0,
   "start_elevation_m": 156.43327238635624,
   "end_elevation_m": 164.36061586527427,
   "start_xy": [
    679217.9331152005,
    4672452.885053374
   ],
   "end_xy": [
    679233.6119893008,
    4672491.213685574
   ]
  },
  "max_100m": {
   "gradient_pct": 14.80909246248555,
   "start_distance_m": 158.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 208.0,
   "start_elevation_m": 129.36831684286898,
   "end_elevation_m": 144.17740930535453,
   "start_xy": [
    679169.5922659836,
    4672275.013457362
   ],
   "end_xy": [
    679186.0150309402,
    4672369.490067781
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -45.00937423122423,
   "start_distance_m": 1443.0,
   "end_distance_m": 1448.0,
   "midpoint_distance_m": 1445.5,
   "start_elevation_m": 274.7667725837399,
   "end_elevation_m": 272.5163038721787,
   "start_xy": [
    679895.7607610116,
    4672748.797032496
   ],
   "end_xy": [
    679900.7328033512,
    4672748.269027985
   ]
  },
  "min_10m": {
   "gradient_pct": -34.32775703726861,
   "start_distance_m": 1438.0,
   "end_distance_m": 1448.0,
   "midpoint_distance_m": 1443.0,
   "start_elevation_m": 275.94907957590556,
   "end_elevation_m": 272.5163038721787,
   "start_xy": [
    679890.7887185677,
    4672749.325037017
   ],
   "end_xy": [
    679900.7328033512,
    4672748.269027985
   ]
  },
  "min_20m": {
   "gradient_pct": -23.3006475944768,
   "start_distance_m": 1475.0,
   "end_distance_m": 1495.0,
   "midpoint_distance_m": 1485.0,
   "start_elevation_m": 271.2084452492533,
   "end_elevation_m": 266.54831573035796,
   "start_xy": [
    679927.4864023274,
    4672744.6506366385
   ],
   "end_xy": [
    679947.2847368488,
    4672741.817642434
   ]
  },
  "min_25m": {
   "gradient_pct": -21.340083172545746,
   "start_distance_m": 1470.0,
   "end_distance_m": 1495.0,
   "midpoint_distance_m": 1482.5,
   "start_elevation_m": 271.8833365234944,
   "end_elevation_m": 266.54831573035796,
   "start_xy": [
    679922.536783017,
    4672745.358635806
   ],
   "end_xy": [
    679947.2847368488,
    4672741.817642434
   ]
  },
  "min_50m": {
   "gradient_pct": -15.72940017524445,
   "start_distance_m": 1439.0,
   "end_distance_m": 1489.0,
   "midpoint_distance_m": 1464.0,
   "start_elevation_m": 275.71987689225676,
   "end_elevation_m": 267.85517680463454,
   "start_xy": [
    679891.7831811211,
    4672749.219945656
   ],
   "end_xy": [
    679941.345259883,
    4672742.667704138
   ]
  },
  "min_100m": {
   "gradient_pct": -9.355176273126972,
   "start_distance_m": 1433.0,
   "end_distance_m": 1533.0,
   "midpoint_distance_m": 1483.0,
   "start_elevation_m": 276.1687550130605,
   "end_elevation_m": 266.8135787399335,
   "start_xy": [
    679885.8166761238,
    4672749.853041539
   ],
   "end_xy": [
    679984.9016716309,
    4672736.435645079
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.993675731010796,
   "start_distance_m": 514.0,
   "end_distance_m": 516.0,
   "midpoint_distance_m": 515.0,
   "start_elevation_m": 175.9694951753435,
   "end_elevation_m": 176.6293686899637,
   "start_xy": [
    679185.6564311113,
    4672589.553094047
   ],
   "end_xy": [
    679185.4824581989,
    4672591.545513034
   ]
  },
  "max_3m": {
   "gradient_pct": 28.833357074781436,
   "start_distance_m": 514.0,
   "end_distance_m": 517.0,
   "midpoint_distance_m": 515.5,
   "start_elevation_m": 175.9694951753435,
   "end_elevation_m": 176.83449588758694,
   "start_xy": [
    679185.6564311113,
    4672589.553094047
   ],
   "end_xy": [
    679185.3954401407,
    4672592.541719768
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.015,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.088,
   "windows_resited": [
    25.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.167,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 4,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 1002.0,
     "end_m": 1027.0,
     "raw_pct": 24.05,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 1002.0,
     "end_m": 1022.0,
     "raw_pct": 25.57,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 532.0,
     "end_m": 542.0,
     "raw_pct": 31.97,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 536.0,
     "end_m": 541.0,
     "raw_pct": 41.45,
     "reason": "hump+short-step"
    },
    {
     "window_m": 25.0,
     "start_m": 650.0,
     "end_m": 675.0,
     "raw_pct": 22.05,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 655.0,
     "end_m": 675.0,
     "raw_pct": 23.31,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 664.0,
     "end_m": 674.0,
     "raw_pct": 30.91,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 770.0,
     "end_m": 775.0,
     "raw_pct": 39.88,
     "reason": "short-step"
    },
    {
     "window_m": 25.0,
     "start_m": 622.0,
     "end_m": 647.0,
     "raw_pct": 20.8,
     "reason": "mask-edge"
    },
    {
     "window_m": 20.0,
     "start_m": 298.0,
     "end_m": 318.0,
     "raw_pct": 21.89,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 302.0,
     "end_m": 312.0,
     "raw_pct": 26.69,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 964.0,
     "end_m": 969.0,
     "raw_pct": 35.44,
     "reason": "short-step"
    },
    {
     "window_m": 10.0,
     "start_m": 459.0,
     "end_m": 469.0,
     "raw_pct": 23.19,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 606.0,
     "end_m": 611.0,
     "raw_pct": 32.41,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.769,
   "obstruction_max_height_m": 26.54,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    296.0,
    320.0
   ],
   [
    457.0,
    471.0
   ],
   [
    530.0,
    544.0
   ],
   [
    604.0,
    613.0
   ],
   [
    620.0,
    677.0
   ],
   [
    768.0,
    777.0
   ],
   [
    840.0,
    870.0
   ],
   [
    910.0,
    940.0
   ],
   [
    962.0,
    1029.0
   ],
   [
    1070.0,
    1100.0
   ],
   [
    1240.0,
    1270.0
   ],
   [
    1422.0,
    1453.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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/ma/USGS_1M_18_x67y468_MA_Western_B24.tif",
   "data/cache/usa/ma/USGS_1M_18_x68y468_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-11T23:05:55+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-us-ma/batch-usa-rchunk00.pbf",
  "osm_snapshot": "",
  "run_id": "texture-us-ma-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, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x67y468",
   "x68y468"
  ],
  "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_L2_2015_LAS_2018",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.994,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Russell",
  "county": "Massachusetts"
 }
}