{
 "ocl_version": "0.1.0",
 "name": "Chestnut Street",
 "slug": "chestnut-street",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.345807909302096,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 229.0,
   "end_distance_m": 231.0,
   "start_elevation_m": 148.22758184352034,
   "end_elevation_m": 148.67449800170638,
   "min_gradient_pct": -0.23958642041606026
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.121100693746598,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 228.0,
   "end_distance_m": 231.0,
   "start_elevation_m": 148.01086498089398,
   "end_elevation_m": 148.67449800170638,
   "min_gradient_pct": 0.3297432408525462
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.469103941864773,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 227.0,
   "end_distance_m": 232.0,
   "start_elevation_m": 147.80282356366578,
   "end_elevation_m": 148.87627876075902,
   "min_gradient_pct": 1.079435310537633
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.151920971383618,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 228.0,
   "end_distance_m": 238.0,
   "start_elevation_m": 148.01086498089398,
   "end_elevation_m": 150.12605707803235,
   "min_gradient_pct": 1.179136674486756
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.802400372671883,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 227.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 147.80282356366578,
   "end_elevation_m": 151.96330363820016,
   "min_gradient_pct": 1.846393662783612
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.679508252256028,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 222.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 146.79342657513615,
   "end_elevation_m": 151.96330363820016,
   "min_gradient_pct": 2.4774044193669624
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.40646359117602,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 220.0,
   "end_distance_m": 270.0,
   "start_elevation_m": 146.39369750694982,
   "end_elevation_m": 156.59692930253783,
   "min_gradient_pct": 4.46170537794012
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.317706186455553,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 200.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 142.637984362675,
   "end_elevation_m": 161.95569054913057,
   "min_gradient_pct": 6.33497309650113
  }
 ],
 "shape": {
  "ascent_concentration": 0.425,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 111.0,
  "shape_class": "sustained"
 },
 "length_m": 467.85571483086085,
 "start_elevation_m": 129.79393174178776,
 "end_elevation_m": 178.2640923547938,
 "endpoint_gain_m": 48.470160613006044,
 "overall_gradient_pct": 10.360065951215104,
 "accumulated_ascent_m": 48.474952341414365,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.469103941864773,
   "start_distance_m": 227.0,
   "end_distance_m": 232.0,
   "midpoint_distance_m": 229.5,
   "start_elevation_m": 147.80282356366578,
   "end_elevation_m": 148.87627876075902,
   "start_xy": [
    711821.1968692502,
    4638495.1737709595
   ],
   "end_xy": [
    711821.7438679973,
    4638500.143759536
   ]
  },
  "max_10m": {
   "gradient_pct": 21.151920971383618,
   "start_distance_m": 228.0,
   "end_distance_m": 238.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 148.01086498089398,
   "end_elevation_m": 150.12605707803235,
   "start_xy": [
    711821.3063258206,
    4638496.1677624155
   ],
   "end_xy": [
    711822.3998712683,
    4638506.107789365
   ]
  },
  "max_20m": {
   "gradient_pct": 20.802400372671883,
   "start_distance_m": 227.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 237.0,
   "start_elevation_m": 147.80282356366578,
   "end_elevation_m": 151.96330363820016,
   "start_xy": [
    711821.1968692502,
    4638495.1737709595
   ],
   "end_xy": [
    711823.3838761748,
    4638515.053834109
   ]
  },
  "max_25m": {
   "gradient_pct": 20.679508252256028,
   "start_distance_m": 222.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 234.5,
   "start_elevation_m": 146.79342657513615,
   "end_elevation_m": 151.96330363820016,
   "start_xy": [
    711820.6498705029,
    4638490.203782383
   ],
   "end_xy": [
    711823.3838761748,
    4638515.053834109
   ]
  },
  "max_50m": {
   "gradient_pct": 20.40646359117602,
   "start_distance_m": 220.0,
   "end_distance_m": 270.0,
   "midpoint_distance_m": 245.0,
   "start_elevation_m": 146.39369750694982,
   "end_elevation_m": 156.59692930253783,
   "start_xy": [
    711820.4313254345,
    4638488.215758925
   ],
   "end_xy": [
    711825.8993368812,
    4638537.915862363
   ]
  },
  "max_100m": {
   "gradient_pct": 19.317706186455553,
   "start_distance_m": 200.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 250.0,
   "start_elevation_m": 142.637984362675,
   "end_elevation_m": 161.95569054913057,
   "start_xy": [
    711817.2044552213,
    4638468.498130584
   ],
   "end_xy": [
    711829.0490680361,
    4638567.744638006
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.079435310537633,
   "start_distance_m": 126.0,
   "end_distance_m": 131.0,
   "midpoint_distance_m": 128.5,
   "start_elevation_m": 138.22407822060185,
   "end_elevation_m": 138.27804998612874,
   "start_xy": [
    711747.9719263647,
    4638481.075380147
   ],
   "end_xy": [
    711752.9518471302,
    4638480.62773856
   ]
  },
  "min_10m": {
   "gradient_pct": 1.179136674486756,
   "start_distance_m": 126.0,
   "end_distance_m": 136.0,
   "midpoint_distance_m": 131.0,
   "start_elevation_m": 138.22407822060185,
   "end_elevation_m": 138.34199188805053,
   "start_xy": [
    711747.9719263647,
    4638481.075380147
   ],
   "end_xy": [
    711757.9143766798,
    4638480.024245108
   ]
  },
  "min_20m": {
   "gradient_pct": 1.846393662783612,
   "start_distance_m": 118.0,
   "end_distance_m": 138.0,
   "midpoint_distance_m": 128.0,
   "start_elevation_m": 138.0529298219899,
   "end_elevation_m": 138.42220855454661,
   "start_xy": [
    711744.1657018085,
    4638478.508717524
   ],
   "end_xy": [
    711759.8964258066,
    4638479.756886924
   ]
  },
  "min_25m": {
   "gradient_pct": 2.4774044193669624,
   "start_distance_m": 115.0,
   "end_distance_m": 140.0,
   "midpoint_distance_m": 127.5,
   "start_elevation_m": 137.90235292644684,
   "end_elevation_m": 138.52170403128858,
   "start_xy": [
    711745.263998413,
    4638475.718004494
   ],
   "end_xy": [
    711761.8778913433,
    4638479.485346458
   ]
  },
  "min_50m": {
   "gradient_pct": 4.46170537794012,
   "start_distance_m": 115.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 140.0,
   "start_elevation_m": 137.90235292644684,
   "end_elevation_m": 140.1332056154169,
   "start_xy": [
    711745.263998413,
    4638475.718004494
   ],
   "end_xy": [
    711786.2558209031,
    4638473.996943943
   ]
  },
  "min_100m": {
   "gradient_pct": 6.33497309650113,
   "start_distance_m": 98.0,
   "end_distance_m": 198.0,
   "midpoint_distance_m": 148.0,
   "start_elevation_m": 136.12682620308797,
   "end_elevation_m": 142.4617992995891,
   "start_xy": [
    711750.2870584201,
    4638459.485791635
   ],
   "end_xy": [
    711816.8054953093,
    4638466.538327015
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.345807909302096,
   "start_distance_m": 229.0,
   "end_distance_m": 231.0,
   "midpoint_distance_m": 230.0,
   "start_elevation_m": 148.22758184352034,
   "end_elevation_m": 148.67449800170638,
   "start_xy": [
    711821.4158663618,
    4638497.161744621
   ],
   "end_xy": [
    711821.6343274709,
    4638499.149777329
   ]
  },
  "max_3m": {
   "gradient_pct": 22.121100693746598,
   "start_distance_m": 228.0,
   "end_distance_m": 231.0,
   "midpoint_distance_m": 229.5,
   "start_elevation_m": 148.01086498089398,
   "end_elevation_m": 148.67449800170638,
   "start_xy": [
    711821.3063258206,
    4638496.1677624155
   ],
   "end_xy": [
    711821.6343274709,
    4638499.149777329
   ]
  }
 },
 "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": 0.171,
   "obstruction_max_height_m": 26.13,
   "flagged_windows_m": [
    50,
    100
   ]
  },
  "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ct/USGS_1M_18_x71y464_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-09-03T14:02:47+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/chestnut-street/chestnut-street.geojson",
  "run_id": "canopy-all-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, CT_Statewide_C16 (collected 2016)",
  "elevation_tile_ids": [
   "x71y464"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/CT_Statewide_B6_2016",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.953,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Vernon",
  "county": "Connecticut"
 }
}