{
 "ocl_version": "0.1.0",
 "name": "Shaw Heights",
 "slug": "shaw-heights",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.817885887682564,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 183.0,
   "end_distance_m": 185.0,
   "start_elevation_m": 304.8874613500327,
   "end_elevation_m": 305.32381906778636,
   "min_gradient_pct": -0.17789231248457327
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.65994455152145,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 182.0,
   "end_distance_m": 185.0,
   "start_elevation_m": 304.6740207312407,
   "end_elevation_m": 305.32381906778636,
   "min_gradient_pct": -0.17563611284003855
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.062964665478603,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 183.0,
   "end_distance_m": 188.0,
   "start_elevation_m": 304.8874613500327,
   "end_elevation_m": 305.94060958330664,
   "min_gradient_pct": 0.2620380167820713
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.74177405629314,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 180.0,
   "end_distance_m": 190.0,
   "start_elevation_m": 304.2811463160604,
   "end_elevation_m": 306.35532372168973,
   "min_gradient_pct": 1.1192937489903443
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.373415966592745,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 176.0,
   "end_distance_m": 196.0,
   "start_elevation_m": 303.45949737659726,
   "end_elevation_m": 307.5341805699158,
   "min_gradient_pct": 1.7649322757890218
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.26430662659186,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 176.0,
   "end_distance_m": 201.0,
   "start_elevation_m": 303.45949737659726,
   "end_elevation_m": 308.5255740332452,
   "min_gradient_pct": 2.1919287156313203
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.117241745756587,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 169.0,
   "end_distance_m": 219.0,
   "start_elevation_m": 302.1047665007504,
   "end_elevation_m": 312.16338737362867,
   "min_gradient_pct": 3.454113141342191
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.530638043982208,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 132.0,
   "end_distance_m": 232.0,
   "start_elevation_m": 295.7836992740407,
   "end_elevation_m": 314.3143373180229,
   "min_gradient_pct": 4.62381913227415
  }
 ],
 "shape": {
  "ascent_concentration": 0.418,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 254.0,
  "shape_class": "sustained"
 },
 "length_m": 386.7028412377284,
 "start_elevation_m": 280.05555526855494,
 "end_elevation_m": 323.2542783483273,
 "endpoint_gain_m": 43.19872307977238,
 "overall_gradient_pct": 11.171038449447453,
 "accumulated_ascent_m": 43.20734286240287,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.062964665478603,
   "start_distance_m": 183.0,
   "end_distance_m": 188.0,
   "midpoint_distance_m": 185.5,
   "start_elevation_m": 304.8874613500327,
   "end_elevation_m": 305.94060958330664,
   "start_xy": [
    683516.5819152815,
    4914653.940373353
   ],
   "end_xy": [
    683520.9660796515,
    4914651.536396902
   ]
  },
  "max_10m": {
   "gradient_pct": 20.74177405629314,
   "start_distance_m": 180.0,
   "end_distance_m": 190.0,
   "midpoint_distance_m": 185.0,
   "start_elevation_m": 304.2811463160604,
   "end_elevation_m": 306.35532372168973,
   "start_xy": [
    683513.9514166595,
    4914655.382759224
   ],
   "end_xy": [
    683522.7197453995,
    4914650.574806321
   ]
  },
  "max_20m": {
   "gradient_pct": 20.373415966592745,
   "start_distance_m": 176.0,
   "end_distance_m": 196.0,
   "midpoint_distance_m": 186.0,
   "start_elevation_m": 303.45949737659726,
   "end_elevation_m": 307.5341805699158,
   "start_xy": [
    683510.4440851635,
    4914657.305940384
   ],
   "end_xy": [
    683527.9807426435,
    4914647.69003458
   ]
  },
  "max_25m": {
   "gradient_pct": 20.26430662659186,
   "start_distance_m": 176.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 188.5,
   "start_elevation_m": 303.45949737659726,
   "end_elevation_m": 308.5255740332452,
   "start_xy": [
    683510.4440851635,
    4914657.305940384
   ],
   "end_xy": [
    683532.3649070135,
    4914645.286058129
   ]
  },
  "max_50m": {
   "gradient_pct": 20.117241745756587,
   "start_distance_m": 169.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 194.0,
   "start_elevation_m": 302.1047665007504,
   "end_elevation_m": 312.16338737362867,
   "start_xy": [
    683504.2787830614,
    4914660.619564945
   ],
   "end_xy": [
    683548.1478987454,
    4914636.631742906
   ]
  },
  "max_100m": {
   "gradient_pct": 18.530638043982208,
   "start_distance_m": 132.0,
   "end_distance_m": 232.0,
   "midpoint_distance_m": 182.0,
   "start_elevation_m": 295.7836992740407,
   "end_elevation_m": 314.3143373180229,
   "start_xy": [
    683471.3146793039,
    4914677.423369975
   ],
   "end_xy": [
    683559.5467261074,
    4914630.381404133
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.2620380167820713,
   "start_distance_m": 381.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 383.5,
   "start_elevation_m": 323.23478979031836,
   "end_elevation_m": 323.24789169115746,
   "start_xy": [
    683628.7959297482,
    4914501.55477824
   ],
   "end_xy": [
    683630.4144828297,
    4914496.823997551
   ]
  },
  "min_10m": {
   "gradient_pct": 1.1192937489903443,
   "start_distance_m": 375.0,
   "end_distance_m": 385.0,
   "midpoint_distance_m": 380.0,
   "start_elevation_m": 323.1245229688123,
   "end_elevation_m": 323.23645234371133,
   "start_xy": [
    683626.8536660505,
    4914507.231715065
   ],
   "end_xy": [
    683630.0907722134,
    4914497.770153688
   ]
  },
  "min_20m": {
   "gradient_pct": 1.7649322757890218,
   "start_distance_m": 366.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 376.0,
   "start_elevation_m": 322.89490523599966,
   "end_elevation_m": 323.24789169115746,
   "start_xy": [
    683623.9402705038,
    4914515.747120305
   ],
   "end_xy": [
    683630.4144828297,
    4914496.823997551
   ]
  },
  "min_25m": {
   "gradient_pct": 2.1919287156313203,
   "start_distance_m": 361.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 373.5,
   "start_elevation_m": 322.69990951224963,
   "end_elevation_m": 323.24789169115746,
   "start_xy": [
    683622.3848175815,
    4914520.498371486
   ],
   "end_xy": [
    683630.4144828297,
    4914496.823997551
   ]
  },
  "min_50m": {
   "gradient_pct": 3.454113141342191,
   "start_distance_m": 265.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 290.0,
   "start_elevation_m": 318.12789765903506,
   "end_elevation_m": 319.85495422970615,
   "start_xy": [
    683581.3939460032,
    4914606.378325875
   ],
   "end_xy": [
    683603.6372042295,
    4914562.206169831
   ]
  },
  "min_100m": {
   "gradient_pct": 4.62381913227415,
   "start_distance_m": 286.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 336.0,
   "start_elevation_m": 318.6240725588833,
   "end_elevation_m": 323.24789169115746,
   "start_xy": [
    683587.673073187,
    4914586.348479446
   ],
   "end_xy": [
    683630.4144828297,
    4914496.823997551
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.817885887682564,
   "start_distance_m": 183.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 184.0,
   "start_elevation_m": 304.8874613500327,
   "end_elevation_m": 305.32381906778636,
   "start_xy": [
    683516.5819152815,
    4914653.940373353
   ],
   "end_xy": [
    683518.3355810295,
    4914652.978782772
   ]
  },
  "max_3m": {
   "gradient_pct": 21.65994455152145,
   "start_distance_m": 182.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 183.5,
   "start_elevation_m": 304.6740207312407,
   "end_elevation_m": 305.32381906778636,
   "start_xy": [
    683515.7050824076,
    4914654.421168643
   ],
   "end_xy": [
    683518.3355810295,
    4914652.978782772
   ]
  }
 },
 "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": 0.116,
   "obstruction_max_height_m": 25.59,
   "flagged_windows_m": []
  },
  "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/vt/USGS_1M_18_x68y492_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T22:38:48+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": "redo-vt-1-260824",
  "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": [
   "x68y492"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.4% over 200 m (Terrain 50), gain 43.7 m over 387 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "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.html"
 },
 "area": {
  "place": "Waterbury",
  "county": "Vermont"
 }
}