{
 "ocl_version": "0.1.0",
 "name": "Jim Hill Place",
 "slug": "jim-hill-place",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.58207974115703,
   "diagnostic": true,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 44.0,
   "end_distance_m": 46.0,
   "start_elevation_m": 310.52986174942,
   "end_elevation_m": 311.1415033442431,
   "min_gradient_pct": -12.10008569342449,
   "suppressed_max_gradient_pct": 42.12823943437911,
   "suppressed_location_m": [
    217.0,
    219.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.920584007582267,
   "diagnostic": true,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 329.0,
   "end_distance_m": 332.0,
   "start_elevation_m": 354.51895198446414,
   "end_elevation_m": 355.3565695046916,
   "min_gradient_pct": -9.104634654168345,
   "suppressed_max_gradient_pct": 39.47987178034017,
   "suppressed_location_m": [
    216.0,
    219.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.368441330465885,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 41.0,
   "end_distance_m": 46.0,
   "start_elevation_m": 309.7730812777198,
   "end_elevation_m": 311.1415033442431,
   "min_gradient_pct": -0.12904589916502118,
   "suppressed_max_gradient_pct": 31.089001586904033,
   "suppressed_location_m": [
    215.0,
    220.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.878130413814688,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 39.0,
   "end_distance_m": 49.0,
   "start_elevation_m": 309.46532516051474,
   "end_elevation_m": 311.7531382018962,
   "min_gradient_pct": 2.1695450997611943,
   "suppressed_max_gradient_pct": 24.971406393862026,
   "suppressed_location_m": [
    216.0,
    226.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.582950996083014,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 317.0,
   "end_distance_m": 337.0,
   "start_elevation_m": 352.21965811888424,
   "end_elevation_m": 356.33624831810084,
   "min_gradient_pct": 2.8819359031862746,
   "suppressed_max_gradient_pct": 24.56041004612331,
   "suppressed_location_m": [
    216.0,
    236.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.155369659222288,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 309.0,
   "end_distance_m": 334.0,
   "start_elevation_m": 350.772430304349,
   "end_elevation_m": 355.81127271915454,
   "min_gradient_pct": 3.4637114993536215,
   "suppressed_max_gradient_pct": 22.414789492465616,
   "suppressed_location_m": [
    214.0,
    239.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.298479865585364,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 284.0,
   "end_distance_m": 334.0,
   "start_elevation_m": 346.66203278636186,
   "end_elevation_m": 355.81127271915454,
   "min_gradient_pct": 5.461856637744177,
   "suppressed_max_gradient_pct": 18.95098344698954,
   "suppressed_location_m": [
    186.0,
    236.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.205317660205026,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 24.0,
   "end_distance_m": 124.0,
   "start_elevation_m": 307.5970930888555,
   "end_elevation_m": 322.8024107490605,
   "min_gradient_pct": 8.256557225374422,
   "suppressed_max_gradient_pct": 17.91242377944849,
   "suppressed_location_m": [
    136.0,
    236.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.32,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 84.0,
  "shape_class": "sustained"
 },
 "length_m": 441.0509997745066,
 "start_elevation_m": 305.75558180588666,
 "end_elevation_m": 365.18130913861296,
 "endpoint_gain_m": 59.4257273327263,
 "overall_gradient_pct": 13.473663445521836,
 "accumulated_ascent_m": 60.088987124121445,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.368441330465885,
   "start_distance_m": 41.0,
   "end_distance_m": 46.0,
   "midpoint_distance_m": 43.5,
   "start_elevation_m": 309.7730812777198,
   "end_elevation_m": 311.1415033442431,
   "start_xy": [
    702402.3832866916,
    4879142.406342385
   ],
   "end_xy": [
    702407.0284237253,
    4879144.256396962
   ]
  },
  "max_10m": {
   "gradient_pct": 22.878130413814688,
   "start_distance_m": 39.0,
   "end_distance_m": 49.0,
   "midpoint_distance_m": 44.0,
   "start_elevation_m": 309.46532516051474,
   "end_elevation_m": 311.7531382018962,
   "start_xy": [
    702400.4194091491,
    4879142.141908635
   ],
   "end_xy": [
    702409.8151617942,
    4879145.367292642
   ]
  },
  "max_20m": {
   "gradient_pct": 20.582950996083014,
   "start_distance_m": 317.0,
   "end_distance_m": 337.0,
   "midpoint_distance_m": 327.0,
   "start_elevation_m": 352.21965811888424,
   "end_elevation_m": 356.33624831810084,
   "start_xy": [
    702647.9223406193,
    4879239.580526351
   ],
   "end_xy": [
    702665.0758457959,
    4879249.840854508
   ]
  },
  "max_25m": {
   "gradient_pct": 20.155369659222288,
   "start_distance_m": 309.0,
   "end_distance_m": 334.0,
   "midpoint_distance_m": 321.5,
   "start_elevation_m": 350.772430304349,
   "end_elevation_m": 355.81127271915454,
   "start_xy": [
    702640.9610629717,
    4879235.638369017
   ],
   "end_xy": [
    702662.5945898376,
    4879248.159042785
   ]
  },
  "max_50m": {
   "gradient_pct": 18.298479865585364,
   "start_distance_m": 284.0,
   "end_distance_m": 334.0,
   "midpoint_distance_m": 309.0,
   "start_elevation_m": 346.66203278636186,
   "end_elevation_m": 355.81127271915454,
   "start_xy": [
    702619.3955533316,
    4879223.005722382
   ],
   "end_xy": [
    702662.5945898376,
    4879248.159042785
   ]
  },
  "max_100m": {
   "gradient_pct": 15.205317660205026,
   "start_distance_m": 24.0,
   "end_distance_m": 124.0,
   "midpoint_distance_m": 74.0,
   "start_elevation_m": 307.5970930888555,
   "end_elevation_m": 322.8024107490605,
   "start_xy": [
    702385.421769229,
    4879142.407902154
   ],
   "end_xy": [
    702467.2292068492,
    4879191.233402608
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.12904589916502118,
   "start_distance_m": 379.0,
   "end_distance_m": 384.0,
   "midpoint_distance_m": 381.5,
   "start_elevation_m": 359.2614977541224,
   "end_elevation_m": 359.25504545916414,
   "start_xy": [
    702685.7034528694,
    4879285.706854585
   ],
   "end_xy": [
    702687.6125321368,
    4879290.328046321
   ]
  },
  "min_10m": {
   "gradient_pct": 2.1695450997611943,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 305.75558180588666,
   "end_elevation_m": 305.9725363158628,
   "start_xy": [
    702364.4866271031,
    4879139.170828079
   ],
   "end_xy": [
    702371.4239732784,
    4879142.656237454
   ]
  },
  "min_20m": {
   "gradient_pct": 2.8819359031862746,
   "start_distance_m": 364.0,
   "end_distance_m": 384.0,
   "midpoint_distance_m": 374.0,
   "start_elevation_m": 358.6786582785269,
   "end_elevation_m": 359.25504545916414,
   "start_xy": [
    702679.9745066769,
    4879271.843984737
   ],
   "end_xy": [
    702687.6125321368,
    4879290.328046321
   ]
  },
  "min_25m": {
   "gradient_pct": 3.4637114993536215,
   "start_distance_m": 364.0,
   "end_distance_m": 389.0,
   "midpoint_distance_m": 376.5,
   "start_elevation_m": 358.6786582785269,
   "end_elevation_m": 359.5445861533653,
   "start_xy": [
    702679.9745066769,
    4879271.843984737
   ],
   "end_xy": [
    702689.5224655996,
    4879294.948885377
   ]
  },
  "min_50m": {
   "gradient_pct": 5.461856637744177,
   "start_distance_m": 344.0,
   "end_distance_m": 394.0,
   "midpoint_distance_m": 369.0,
   "start_elevation_m": 357.0557862976457,
   "end_elevation_m": 359.78671461651777,
   "start_xy": [
    702670.3085693393,
    4879254.459812727
   ],
   "end_xy": [
    702691.4013248134,
    4879299.581880778
   ]
  },
  "min_100m": {
   "gradient_pct": 8.256557225374422,
   "start_distance_m": 337.0,
   "end_distance_m": 437.0,
   "midpoint_distance_m": 387.0,
   "start_elevation_m": 356.33624831810084,
   "end_elevation_m": 364.59280554347527,
   "start_xy": [
    702665.0758457959,
    4879249.840854508
   ],
   "end_xy": [
    702702.0167073145,
    4879341.115762907
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.58207974115703,
   "start_distance_m": 44.0,
   "end_distance_m": 46.0,
   "midpoint_distance_m": 45.0,
   "start_elevation_m": 310.52986174942,
   "end_elevation_m": 311.1415033442431,
   "start_xy": [
    702405.1703689119,
    4879143.516375132
   ],
   "end_xy": [
    702407.0284237253,
    4879144.256396962
   ]
  },
  "max_3m": {
   "gradient_pct": 27.920584007582267,
   "start_distance_m": 329.0,
   "end_distance_m": 332.0,
   "midpoint_distance_m": 330.5,
   "start_elevation_m": 354.51895198446414,
   "end_elevation_m": 355.3565695046916,
   "start_xy": [
    702658.3611313332,
    4879245.499171213
   ],
   "end_xy": [
    702660.9052696141,
    4879247.088436974
   ]
  }
 },
 "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": 0.274,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.889,
   "obstruction_max_height_m": 36.59,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    140.0,
    260.0
   ]
  ],
  "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_x70y488_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-08T15:48:34+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/vermont-260821-batch.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "retro-box-260908",
  "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": [
   "x70y488"
  ],
  "route_base_cut_m": 100.2,
  "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": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Chelsea",
  "county": "Vermont"
 }
}