{
 "ocl_version": "0.1.0",
 "name": "Tetu Road",
 "slug": "tetu-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.19551067892917,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 347.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 299.4674175132744,
   "end_elevation_m": 300.231327726853,
   "min_gradient_pct": -77.38035881484961,
   "suppressed_max_gradient_pct": 88.68206853712763,
   "suppressed_location_m": [
    163.0,
    165.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.747460165285325,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 347.0,
   "end_distance_m": 350.0,
   "start_elevation_m": 299.4674175132744,
   "end_elevation_m": 300.509841318233,
   "min_gradient_pct": -74.12770084039077,
   "suppressed_max_gradient_pct": 73.4328861818464,
   "suppressed_location_m": [
    260.0,
    263.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.347723720361046,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 375.0,
   "end_distance_m": 380.0,
   "start_elevation_m": 304.44207372831244,
   "end_elevation_m": 306.0594599143305,
   "min_gradient_pct": -56.15212856815333,
   "suppressed_max_gradient_pct": 48.55606421268931,
   "suppressed_location_m": [
    161.0,
    166.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.08200348088201,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1023.0,
   "end_distance_m": 1033.0,
   "start_elevation_m": 366.35307398029937,
   "end_elevation_m": 369.2612743283876,
   "min_gradient_pct": -25.98863417813334
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.70964854218863,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1373.0,
   "end_distance_m": 1393.0,
   "start_elevation_m": 414.26904069683184,
   "end_elevation_m": 419.21097040526956,
   "min_gradient_pct": -9.01710270457869
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.183679487628524,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1019.0,
   "end_distance_m": 1044.0,
   "start_elevation_m": 365.69716428448294,
   "end_elevation_m": 371.24308415639007,
   "min_gradient_pct": -7.13756931753187
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.999824135834842,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1342.0,
   "end_distance_m": 1392.0,
   "start_elevation_m": 409.51244674666134,
   "end_elevation_m": 419.01235881457876,
   "min_gradient_pct": -5.091709630156856
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.937724502971378,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1292.0,
   "end_distance_m": 1392.0,
   "start_elevation_m": 402.0746343116074,
   "end_elevation_m": 419.01235881457876,
   "min_gradient_pct": -4.257137690733714
  }
 ],
 "shape": {
  "ascent_concentration": 0.385,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 137.0,
  "shape_class": "sustained"
 },
 "length_m": 2063.9528561625903,
 "start_elevation_m": 288.25458426148,
 "end_elevation_m": 439.17752150335275,
 "endpoint_gain_m": 150.92293724187277,
 "overall_gradient_pct": 7.312324832965256,
 "accumulated_ascent_m": 177.2854358274389,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.347723720361046,
   "start_distance_m": 375.0,
   "end_distance_m": 380.0,
   "midpoint_distance_m": 377.5,
   "start_elevation_m": 304.44207372831244,
   "end_elevation_m": 306.0594599143305,
   "start_xy": [
    299135.2160836106,
    4949200.182004604
   ],
   "end_xy": [
    299140.2084031702,
    4949200.4590226
   ]
  },
  "max_10m": {
   "gradient_pct": 29.08200348088201,
   "start_distance_m": 1023.0,
   "end_distance_m": 1033.0,
   "midpoint_distance_m": 1028.0,
   "start_elevation_m": 366.35307398029937,
   "end_elevation_m": 369.2612743283876,
   "start_xy": [
    299741.0592341032,
    4949139.501263849
   ],
   "end_xy": [
    299750.2050837868,
    4949135.457330219
   ]
  },
  "max_20m": {
   "gradient_pct": 24.70964854218863,
   "start_distance_m": 1373.0,
   "end_distance_m": 1393.0,
   "midpoint_distance_m": 1383.0,
   "start_elevation_m": 414.26904069683184,
   "end_elevation_m": 419.21097040526956,
   "start_xy": [
    300004.1483640874,
    4948920.311378837
   ],
   "end_xy": [
    300013.18517491844,
    4948902.469405705
   ]
  },
  "max_25m": {
   "gradient_pct": 22.183679487628524,
   "start_distance_m": 1019.0,
   "end_distance_m": 1044.0,
   "midpoint_distance_m": 1031.5,
   "start_elevation_m": 365.69716428448294,
   "end_elevation_m": 371.24308415639007,
   "start_xy": [
    299737.401056106,
    4949141.119204674
   ],
   "end_xy": [
    299759.962232502,
    4949130.445863989
   ]
  },
  "max_50m": {
   "gradient_pct": 18.999824135834842,
   "start_distance_m": 1342.0,
   "end_distance_m": 1392.0,
   "midpoint_distance_m": 1367.0,
   "start_elevation_m": 409.51244674666134,
   "end_elevation_m": 419.01235881457876,
   "start_xy": [
    299990.21885747975,
    4948948.000741975
   ],
   "end_xy": [
    300012.73330740444,
    4948903.361490698
   ]
  },
  "max_100m": {
   "gradient_pct": 16.937724502971378,
   "start_distance_m": 1292.0,
   "end_distance_m": 1392.0,
   "midpoint_distance_m": 1342.0,
   "start_elevation_m": 402.0746343116074,
   "end_elevation_m": 419.01235881457876,
   "start_xy": [
    299962.5526733366,
    4948988.586093197
   ],
   "end_xy": [
    300012.73330740444,
    4948903.361490698
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -56.15212856815333,
   "start_distance_m": 153.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 155.5,
   "start_elevation_m": 289.5374132010262,
   "end_elevation_m": 286.72980677261853,
   "start_xy": [
    298913.3712695084,
    4949193.727002156
   ],
   "end_xy": [
    298918.37110101664,
    4949193.768000809
   ]
  },
  "min_10m": {
   "gradient_pct": -25.98863417813334,
   "start_distance_m": 152.0,
   "end_distance_m": 162.0,
   "midpoint_distance_m": 157.0,
   "start_elevation_m": 289.4654311490605,
   "end_elevation_m": 286.8665677312472,
   "start_xy": [
    298912.3713015068,
    4949193.719002412
   ],
   "end_xy": [
    298922.37096452335,
    4949193.800999716
   ]
  },
  "min_20m": {
   "gradient_pct": -9.01710270457869,
   "start_distance_m": 138.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 148.0,
   "start_elevation_m": 288.53322731353427,
   "end_elevation_m": 286.72980677261853,
   "start_xy": [
    298898.3717750476,
    4949193.603998201
   ],
   "end_xy": [
    298918.37110101664,
    4949193.768000809
   ]
  },
  "min_25m": {
   "gradient_pct": -7.13756931753187,
   "start_distance_m": 135.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 147.5,
   "start_elevation_m": 288.54104897858895,
   "end_elevation_m": 286.756656649206,
   "start_xy": [
    298895.3718795424,
    4949193.578999036
   ],
   "end_xy": [
    298920.37103701936,
    4949193.784000333
   ]
  },
  "min_50m": {
   "gradient_pct": -5.091709630156856,
   "start_distance_m": 1819.0,
   "end_distance_m": 1869.0,
   "midpoint_distance_m": 1844.0,
   "start_elevation_m": 432.6365168992022,
   "end_elevation_m": 430.0906620841238,
   "start_xy": [
    300139.2982736834,
    4948501.820207242
   ],
   "end_xy": [
    300142.1473395345,
    4948453.086793559
   ]
  },
  "min_100m": {
   "gradient_pct": -4.257137690733714,
   "start_distance_m": 1785.0,
   "end_distance_m": 1885.0,
   "midpoint_distance_m": 1835.0,
   "start_elevation_m": 433.7124471998714,
   "end_elevation_m": 429.4553095091377,
   "start_xy": [
    300122.2085348057,
    4948531.143066224
   ],
   "end_xy": [
    300138.3851728763,
    4948437.605529793
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.19551067892917,
   "start_distance_m": 347.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 348.0,
   "start_elevation_m": 299.4674175132744,
   "end_elevation_m": 300.231327726853,
   "start_xy": [
    299107.25924328953,
    4949198.628013638
   ],
   "end_xy": [
    299109.2561606986,
    4949198.739009008
   ]
  },
  "max_3m": {
   "gradient_pct": 34.747460165285325,
   "start_distance_m": 347.0,
   "end_distance_m": 350.0,
   "midpoint_distance_m": 348.5,
   "start_elevation_m": 299.4674175132744,
   "end_elevation_m": 300.509841318233,
   "start_xy": [
    299107.25924328953,
    4949198.628013638
   ],
   "end_xy": [
    299110.2545932509,
    4949198.794977199
   ]
  }
 },
 "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": 0.011,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.05,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.633,
   "obstruction_max_height_m": 25.62,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    152.0,
    159.0
   ],
   [
    161.0,
    167.0
   ],
   [
    258.0,
    264.0
   ],
   [
    1500.0,
    1580.0
   ]
  ],
  "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_one_meter_x29y495_NH_CT_RiverNorthL6_2015.tif",
   "data/cache/usa/nh/USGS_one_meter_x30y495_NH_CT_RiverNorthL6_2015.tif"
  ],
  "calculated_at": "2026-09-03T08:13:57+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/tetu-road/tetu-road.geojson",
  "run_id": "canopy-260903",
  "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_CT_RiverNorthL6_2015 (collected 2015)",
  "elevation_tile_ids": [
   "x29y495",
   "x30y495"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_CT_River_Lot6_Winnipesaulee_2015_LAS_2017",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.991,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Stratford",
  "county": "New Hampshire"
 }
}