{
 "ocl_version": "0.1.0",
 "name": "King Street",
 "slug": "king-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.441528763123642,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 271.0,
   "end_distance_m": 273.0,
   "start_elevation_m": 364.2076065530008,
   "end_elevation_m": 364.6764371282633,
   "min_gradient_pct": -6.31687333275579
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.548438745281903,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 272.0,
   "end_distance_m": 275.0,
   "start_elevation_m": 364.43640839065085,
   "end_elevation_m": 365.1428615530093,
   "min_gradient_pct": -5.676982564140569
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.1432001998769,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 271.0,
   "end_distance_m": 276.0,
   "start_elevation_m": 364.2076065530008,
   "end_elevation_m": 365.36476656299465,
   "min_gradient_pct": -4.996439557629628
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.875079330353287,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 268.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 363.5308166973876,
   "end_elevation_m": 365.8183246304229,
   "min_gradient_pct": -4.103928119359352
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.402625801771308,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 265.0,
   "end_distance_m": 285.0,
   "start_elevation_m": 362.89322522996514,
   "end_elevation_m": 367.3737503903194,
   "min_gradient_pct": -2.617028398923935
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.293314822208913,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 266.0,
   "end_distance_m": 291.0,
   "start_elevation_m": 363.0989086937599,
   "end_elevation_m": 368.6722373993121,
   "min_gradient_pct": -2.3087180254131
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.582330749298194,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 251.0,
   "end_distance_m": 301.0,
   "start_elevation_m": 360.1949059471549,
   "end_elevation_m": 370.486071321804,
   "min_gradient_pct": -1.149391310544388
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.832624017138926,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 208.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 354.57863026338026,
   "end_elevation_m": 371.4112542805192,
   "min_gradient_pct": 2.854325246956762
  }
 ],
 "shape": {
  "ascent_concentration": 0.408,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 98.0,
  "shape_class": "sustained"
 },
 "length_m": 314.6748935550116,
 "start_elevation_m": 336.3269962640374,
 "end_elevation_m": 371.72549788912033,
 "endpoint_gain_m": 35.39850162508293,
 "overall_gradient_pct": 11.249229712981391,
 "accumulated_ascent_m": 36.11376465160538,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.1432001998769,
   "start_distance_m": 271.0,
   "end_distance_m": 276.0,
   "midpoint_distance_m": 273.5,
   "start_elevation_m": 364.2076065530008,
   "end_elevation_m": 365.36476656299465,
   "start_xy": [
    327468.53869051556,
    4926009.009679944
   ],
   "end_xy": [
    327466.8285185897,
    4926004.311242759
   ]
  },
  "max_10m": {
   "gradient_pct": 22.875079330353287,
   "start_distance_m": 268.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 273.0,
   "start_elevation_m": 363.5308166973876,
   "end_elevation_m": 365.8183246304229,
   "start_xy": [
    327469.564793671,
    4926011.828742255
   ],
   "end_xy": [
    327466.1444498194,
    4926002.4318678845
   ]
  },
  "max_20m": {
   "gradient_pct": 22.402625801771308,
   "start_distance_m": 265.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 362.89322522996514,
   "end_elevation_m": 367.3737503903194,
   "start_xy": [
    327470.5908968265,
    4926014.647804567
   ],
   "end_xy": [
    327463.70976503054,
    4925995.86970248
   ]
  },
  "max_25m": {
   "gradient_pct": 22.293314822208913,
   "start_distance_m": 266.0,
   "end_distance_m": 291.0,
   "midpoint_distance_m": 278.5,
   "start_elevation_m": 363.0989086937599,
   "end_elevation_m": 368.6722373993121,
   "start_xy": [
    327470.24886244134,
    4926013.708117129
   ],
   "end_xy": [
    327461.43310855725,
    4925990.318411161
   ]
  },
  "max_50m": {
   "gradient_pct": 20.582330749298194,
   "start_distance_m": 251.0,
   "end_distance_m": 301.0,
   "midpoint_distance_m": 276.0,
   "start_elevation_m": 360.1949059471549,
   "end_elevation_m": 370.486071321804,
   "start_xy": [
    327475.3793782188,
    4926027.803428685
   ],
   "end_xy": [
    327457.6386811017,
    4925981.066258964
   ]
  },
  "max_100m": {
   "gradient_pct": 16.832624017138926,
   "start_distance_m": 208.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 258.0,
   "start_elevation_m": 354.57863026338026,
   "end_elevation_m": 371.4112542805192,
   "start_xy": [
    327490.12596763566,
    4926068.1954729045
   ],
   "end_xy": [
    327454.6278242064,
    4925974.7583800405
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.996439557629628,
   "start_distance_m": 3.0,
   "end_distance_m": 8.0,
   "midpoint_distance_m": 5.5,
   "start_elevation_m": 336.2246328862061,
   "end_elevation_m": 335.9748109083246,
   "start_xy": [
    327561.21210566233,
    4926260.471124655
   ],
   "end_xy": [
    327559.5312851442,
    4926255.762165957
   ]
  },
  "min_10m": {
   "gradient_pct": -4.103928119359352,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 336.3269962640374,
   "end_elevation_m": 335.91660345210147,
   "start_xy": [
    327562.208,
    4926263.301
   ],
   "end_xy": [
    327558.84965854965,
    4926253.881903958
   ]
  },
  "min_20m": {
   "gradient_pct": -2.617028398923935,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 336.3269962640374,
   "end_elevation_m": 335.8035905842526,
   "start_xy": [
    327562.208,
    4926263.301
   ],
   "end_xy": [
    327555.44152557687,
    4926244.480593962
   ]
  },
  "min_25m": {
   "gradient_pct": -2.3087180254131,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 336.3269962640374,
   "end_elevation_m": 335.74981675768413,
   "start_xy": [
    327562.208,
    4926263.301
   ],
   "end_xy": [
    327553.7374590905,
    4926239.779938964
   ]
  },
  "min_50m": {
   "gradient_pct": -1.149391310544388,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 336.3269962640374,
   "end_elevation_m": 335.7523006087652,
   "start_xy": [
    327562.208,
    4926263.301
   ],
   "end_xy": [
    327545.2171266586,
    4926216.276663974
   ]
  },
  "min_100m": {
   "gradient_pct": 2.854325246956762,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 336.3269962640374,
   "end_elevation_m": 339.18132151099417,
   "start_xy": [
    327562.208,
    4926263.301
   ],
   "end_xy": [
    327528.1759077632,
    4926169.270314939
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.441528763123642,
   "start_distance_m": 271.0,
   "end_distance_m": 273.0,
   "midpoint_distance_m": 272.0,
   "start_elevation_m": 364.2076065530008,
   "end_elevation_m": 364.6764371282633,
   "start_xy": [
    327468.53869051556,
    4926009.009679944
   ],
   "end_xy": [
    327467.85462174524,
    4926007.1303050695
   ]
  },
  "max_3m": {
   "gradient_pct": 23.548438745281903,
   "start_distance_m": 272.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 273.5,
   "start_elevation_m": 364.43640839065085,
   "end_elevation_m": 365.1428615530093,
   "start_xy": [
    327468.19665613037,
    4926008.069992507
   ],
   "end_xy": [
    327467.17055297486,
    4926005.250930196
   ]
  }
 },
 "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": 0.0,
   "obstruction_max_height_m": 0.19,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/nh/USGS_1M_19_x32y493_NH_Umbagog_LiDAR_2016_D16.tif"
  ],
  "calculated_at": "2026-08-24T20:30:34+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-hampshire-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-nh-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, NH_Umbagog_LiDAR_2016_D16 (collected 2016)",
  "elevation_tile_ids": [
   "x32y493"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.7% over 200 m (Terrain 50), gain 35.8 m over 315 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/NH_Umbagog_2016",
   "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.html"
 },
 "area": {
  "place": "Berlin",
  "county": "New Hampshire"
 }
}