{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (42.5952, -73.2529)",
 "slug": "discovered-lane-42-5952-73-2529",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.493992938241036,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 862.0,
   "end_distance_m": 864.0,
   "start_elevation_m": 504.33352865423007,
   "end_elevation_m": 505.2634085129949,
   "min_gradient_pct": -22.75424578331524
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.94579954443028,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 862.0,
   "end_distance_m": 865.0,
   "start_elevation_m": 504.33352865423007,
   "end_elevation_m": 505.471902640563,
   "min_gradient_pct": -15.017407993999162
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.64678269568458,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 860.0,
   "end_distance_m": 865.0,
   "start_elevation_m": 504.03956350577874,
   "end_elevation_m": 505.471902640563,
   "min_gradient_pct": -10.47007977392127
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.712717709486583,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 379.0,
   "end_distance_m": 389.0,
   "start_elevation_m": 437.5760210383504,
   "end_elevation_m": 439.84729280929906,
   "min_gradient_pct": -8.668559568049545
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.06983640993576,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 374.0,
   "end_distance_m": 394.0,
   "start_elevation_m": 436.60463858594886,
   "end_elevation_m": 440.818605867936,
   "min_gradient_pct": -7.298963105483267
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.47988901871622,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 373.0,
   "end_distance_m": 398.0,
   "start_elevation_m": 436.4261485776391,
   "end_elevation_m": 441.54612083231814,
   "min_gradient_pct": -6.72091852887138
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.967380970295608,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 341.0,
   "end_distance_m": 391.0,
   "start_elevation_m": 430.7743947057042,
   "end_elevation_m": 440.258085190852,
   "min_gradient_pct": -3.881575265568358
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.747736605451678,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 321.0,
   "end_distance_m": 421.0,
   "start_elevation_m": 427.4139806915474,
   "end_elevation_m": 445.1617172969991,
   "min_gradient_pct": -3.704847505683688
  }
 ],
 "shape": {
  "ascent_concentration": 0.453,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 279.0,
  "shape_class": "stepped"
 },
 "length_m": 1308.0000000000382,
 "start_elevation_m": 405.43318125830024,
 "end_elevation_m": 508.4109582520025,
 "endpoint_gain_m": 102.97777699370226,
 "overall_gradient_pct": 7.872918730405142,
 "accumulated_ascent_m": 109.6033832307138,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.64678269568458,
   "start_distance_m": 860.0,
   "end_distance_m": 865.0,
   "midpoint_distance_m": 862.5,
   "start_elevation_m": 504.03956350577874,
   "end_elevation_m": 505.471902640563,
   "start_xy": [
    643481.1802121184,
    4717579.672713746
   ],
   "end_xy": [
    643479.5352828313,
    4717574.951039505
   ]
  },
  "max_10m": {
   "gradient_pct": 22.712717709486583,
   "start_distance_m": 379.0,
   "end_distance_m": 389.0,
   "midpoint_distance_m": 384.0,
   "start_elevation_m": 437.5760210383504,
   "end_elevation_m": 439.84729280929906,
   "start_xy": [
    643673.312146229,
    4717930.292489516
   ],
   "end_xy": [
    643663.3666224247,
    4717929.423483949
   ]
  },
  "max_20m": {
   "gradient_pct": 21.06983640993576,
   "start_distance_m": 374.0,
   "end_distance_m": 394.0,
   "midpoint_distance_m": 384.0,
   "start_elevation_m": 436.60463858594886,
   "end_elevation_m": 440.818605867936,
   "start_xy": [
    643678.1555147028,
    4717931.474880774
   ],
   "end_xy": [
    643658.36667082,
    4717929.445482834
   ]
  },
  "max_25m": {
   "gradient_pct": 20.47988901871622,
   "start_distance_m": 373.0,
   "end_distance_m": 398.0,
   "midpoint_distance_m": 385.5,
   "start_elevation_m": 436.4261485776391,
   "end_elevation_m": 441.54612083231814,
   "start_xy": [
    643679.1140280128,
    4717931.759928549
   ],
   "end_xy": [
    643654.3794155504,
    4717929.72489459
   ]
  },
  "max_50m": {
   "gradient_pct": 18.967380970295608,
   "start_distance_m": 341.0,
   "end_distance_m": 391.0,
   "midpoint_distance_m": 366.0,
   "start_elevation_m": 430.7743947057042,
   "end_elevation_m": 440.258085190852,
   "start_xy": [
    643700.3424710432,
    4717953.395432602
   ],
   "end_xy": [
    643661.3666417828,
    4717929.432283503
   ]
  },
  "max_100m": {
   "gradient_pct": 17.747736605451678,
   "start_distance_m": 321.0,
   "end_distance_m": 421.0,
   "midpoint_distance_m": 371.0,
   "start_elevation_m": 427.4139806915474,
   "end_elevation_m": 445.1617172969991,
   "start_xy": [
    643705.8488165291,
    4717972.6094545415
   ],
   "end_xy": [
    643631.7606117283,
    4717933.693196724
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.47007977392127,
   "start_distance_m": 875.0,
   "end_distance_m": 880.0,
   "midpoint_distance_m": 877.5,
   "start_elevation_m": 505.95005576637305,
   "end_elevation_m": 505.426551777677,
   "start_xy": [
    643476.245424257,
    4717565.507691022
   ],
   "end_xy": [
    643474.3358551135,
    4717560.887531758
   ]
  },
  "min_10m": {
   "gradient_pct": -8.668559568049545,
   "start_distance_m": 1144.0,
   "end_distance_m": 1154.0,
   "midpoint_distance_m": 1149.0,
   "start_elevation_m": 504.1115273544287,
   "end_elevation_m": 503.24467139762373,
   "start_xy": [
    643357.3608150993,
    4717337.101501034
   ],
   "end_xy": [
    643347.4216015576,
    4717338.141365041
   ]
  },
  "min_20m": {
   "gradient_pct": -7.298963105483267,
   "start_distance_m": 1137.0,
   "end_distance_m": 1157.0,
   "midpoint_distance_m": 1147.0,
   "start_elevation_m": 504.5357642362672,
   "end_elevation_m": 503.07597161517054,
   "start_xy": [
    643364.3125343621,
    4717336.329860798
   ],
   "end_xy": [
    643344.4254263443,
    4717338.292805097
   ]
  },
  "min_25m": {
   "gradient_pct": -6.72091852887138,
   "start_distance_m": 1082.0,
   "end_distance_m": 1107.0,
   "midpoint_distance_m": 1094.5,
   "start_elevation_m": 506.5139155000513,
   "end_elevation_m": 504.8336858678335,
   "start_xy": [
    643390.2693320538,
    4717377.653040113
   ],
   "end_xy": [
    643383.6306835976,
    4717353.572597366
   ]
  },
  "min_50m": {
   "gradient_pct": -3.881575265568358,
   "start_distance_m": 1080.0,
   "end_distance_m": 1130.0,
   "midpoint_distance_m": 1105.0,
   "start_elevation_m": 506.5733163002845,
   "end_elevation_m": 504.6325286675003,
   "start_xy": [
    643390.9653678641,
    4717379.525668115
   ],
   "end_xy": [
    643371.297326608,
    4717336.285146444
   ]
  },
  "min_100m": {
   "gradient_pct": -3.704847505683688,
   "start_distance_m": 1075.0,
   "end_distance_m": 1175.0,
   "midpoint_distance_m": 1125.0,
   "start_elevation_m": 506.5504701599745,
   "end_elevation_m": 502.8456226542908,
   "start_xy": [
    643392.977536276,
    4717384.102913824
   ],
   "end_xy": [
    643326.4405475896,
    4717338.734448313
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.493992938241036,
   "start_distance_m": 862.0,
   "end_distance_m": 864.0,
   "midpoint_distance_m": 863.0,
   "start_elevation_m": 504.33352865423007,
   "end_elevation_m": 505.2634085129949,
   "start_xy": [
    643480.5222404036,
    4717577.78404405
   ],
   "end_xy": [
    643479.8642686887,
    4717575.895374353
   ]
  },
  "max_3m": {
   "gradient_pct": 37.94579954443028,
   "start_distance_m": 862.0,
   "end_distance_m": 865.0,
   "midpoint_distance_m": 863.5,
   "start_elevation_m": 504.33352865423007,
   "end_elevation_m": 505.471902640563,
   "start_xy": [
    643480.5222404036,
    4717577.78404405
   ],
   "end_xy": [
    643479.5352828313,
    4717574.951039505
   ]
  }
 },
 "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": 0.415,
   "obstruction_max_height_m": 16.5,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "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_x64y472_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-04T21:42:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/massachusetts-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "hunt-wave1-260905",
  "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": [
   "x64y472"
  ],
  "route_summit_trim_m": 81.2,
  "route_summit_trim_loss_m": 6.9,
  "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": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "New Ashford",
  "county": "Massachusetts"
 }
}