{
 "ocl_version": "0.1.0",
 "name": "Eastern Avenue",
 "slug": "eastern-avenue",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.877098485755482,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 18.0,
   "end_distance_m": 20.0,
   "start_elevation_m": 106.63676423768358,
   "end_elevation_m": 107.23430620739869,
   "min_gradient_pct": -0.40351098842705824
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.914485273933565,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 17.0,
   "end_distance_m": 20.0,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 107.23430620739869,
   "min_gradient_pct": -0.3126841183132001
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.170131408456143,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 17.0,
   "end_distance_m": 22.0,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 107.70537821960349,
   "min_gradient_pct": -0.28282847557534296
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.92032547003373,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 17.0,
   "end_distance_m": 27.0,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 108.68890419618405,
   "min_gradient_pct": 0.008863413871722514
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.82386066779236,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 17.0,
   "end_distance_m": 37.0,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 110.56164378273915,
   "min_gradient_pct": 0.5776842530676163
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.11378472772259,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 17.0,
   "end_distance_m": 42.0,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 111.42531783111133,
   "min_gradient_pct": 0.8619332516122995
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.86575476255507,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 16.0,
   "end_distance_m": 66.0,
   "start_elevation_m": 106.24147141691273,
   "end_elevation_m": 115.17434879819027,
   "min_gradient_pct": 1.8550534688856146
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.519972743160706,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 13.0,
   "end_distance_m": 113.0,
   "start_elevation_m": 105.98690030459414,
   "end_elevation_m": 119.50687304775485,
   "min_gradient_pct": 3.684855970813828
  }
 ],
 "shape": {
  "ascent_concentration": 0.321,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 84.0,
  "shape_class": "sustained"
 },
 "length_m": 599.000000000096,
 "start_elevation_m": 105.94276503691077,
 "end_elevation_m": 159.4272988754772,
 "endpoint_gain_m": 53.48453383856642,
 "overall_gradient_pct": 8.928970590744216,
 "accumulated_ascent_m": 53.504057369389045,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.170131408456143,
   "start_distance_m": 17.0,
   "end_distance_m": 22.0,
   "midpoint_distance_m": 19.5,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 107.70537821960349,
   "start_xy": [
    660163.0102089507,
    4605615.97975883
   ],
   "end_xy": [
    660165.9696624641,
    4605611.955044657
   ]
  },
  "max_10m": {
   "gradient_pct": 22.92032547003373,
   "start_distance_m": 17.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 22.0,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 108.68890419618405,
   "start_xy": [
    660163.0102089507,
    4605615.97975883
   ],
   "end_xy": [
    660168.8197669763,
    4605607.84689394
   ]
  },
  "max_20m": {
   "gradient_pct": 20.82386066779236,
   "start_distance_m": 17.0,
   "end_distance_m": 37.0,
   "midpoint_distance_m": 27.0,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 110.56164378273915,
   "start_xy": [
    660163.0102089507,
    4605615.97975883
   ],
   "end_xy": [
    660174.0560369474,
    4605599.419303777
   ]
  },
  "max_25m": {
   "gradient_pct": 20.11378472772259,
   "start_distance_m": 17.0,
   "end_distance_m": 42.0,
   "midpoint_distance_m": 29.5,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 111.42531783111133,
   "start_xy": [
    660163.0102089507,
    4605615.97975883
   ],
   "end_xy": [
    660175.0029464832,
    4605594.509786842
   ]
  },
  "max_50m": {
   "gradient_pct": 17.86575476255507,
   "start_distance_m": 16.0,
   "end_distance_m": 66.0,
   "midpoint_distance_m": 41.0,
   "start_elevation_m": 106.24147141691273,
   "end_elevation_m": 115.17434879819027,
   "start_xy": [
    660162.354897839,
    4605616.735117914
   ],
   "end_xy": [
    660172.0964334023,
    4605571.007964142
   ]
  },
  "max_100m": {
   "gradient_pct": 13.519972743160706,
   "start_distance_m": 13.0,
   "end_distance_m": 113.0,
   "midpoint_distance_m": 63.0,
   "start_elevation_m": 105.98690030459414,
   "end_elevation_m": 119.50687304775485,
   "start_xy": [
    660160.3910201743,
    4605619.002976678
   ],
   "end_xy": [
    660159.9701895302,
    4605526.068968882
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.28282847557534296,
   "start_distance_m": 3.0,
   "end_distance_m": 8.0,
   "midpoint_distance_m": 5.5,
   "start_elevation_m": 105.96610999874235,
   "end_elevation_m": 105.95196857496359,
   "start_xy": [
    660153.8419438112,
    4605626.560064852
   ],
   "end_xy": [
    660157.1159489198,
    4605622.781058957
   ]
  },
  "min_10m": {
   "gradient_pct": 0.008863413871722514,
   "start_distance_m": 1.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 6.0,
   "start_elevation_m": 105.9521420386171,
   "end_elevation_m": 105.95302838000427,
   "start_xy": [
    660152.5318163502,
    4605628.071211969
   ],
   "end_xy": [
    660159.080892731,
    4605620.51412381
   ]
  },
  "min_20m": {
   "gradient_pct": 0.5776842530676163,
   "start_distance_m": 506.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 516.0,
   "start_elevation_m": 155.39230250447514,
   "end_elevation_m": 155.50783935508866,
   "start_xy": [
    660122.4525312572,
    4605138.0401976155
   ],
   "end_xy": [
    660122.9194570247,
    4605118.045651099
   ]
  },
  "min_25m": {
   "gradient_pct": 0.8619332516122995,
   "start_distance_m": 501.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 513.5,
   "start_elevation_m": 155.2923560421856,
   "end_elevation_m": 155.50783935508866,
   "start_xy": [
    660122.3364524592,
    4605143.038849596
   ],
   "end_xy": [
    660122.9194570247,
    4605118.045651099
   ]
  },
  "min_50m": {
   "gradient_pct": 1.8550534688856146,
   "start_distance_m": 476.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 501.0,
   "start_elevation_m": 154.58031262064586,
   "end_elevation_m": 155.50783935508866,
   "start_xy": [
    660121.7534493435,
    4605168.03204808
   ],
   "end_xy": [
    660122.9194570247,
    4605118.045651099
   ]
  },
  "min_100m": {
   "gradient_pct": 3.684855970813828,
   "start_distance_m": 465.0,
   "end_distance_m": 565.0,
   "midpoint_distance_m": 515.0,
   "start_elevation_m": 154.2315343535519,
   "end_elevation_m": 157.91639032436572,
   "start_xy": [
    660121.649842515,
    4605179.02854456
   ],
   "end_xy": [
    660116.4110953045,
    4605079.945937224
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.877098485755482,
   "start_distance_m": 18.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 19.0,
   "start_elevation_m": 106.63676423768358,
   "end_elevation_m": 107.23430620739869,
   "start_xy": [
    660163.6650229777,
    4605615.223968938
   ],
   "end_xy": [
    660164.8295274577,
    4605613.598240276
   ]
  },
  "max_3m": {
   "gradient_pct": 27.914485273933565,
   "start_distance_m": 17.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 18.5,
   "start_elevation_m": 106.39687164918068,
   "end_elevation_m": 107.23430620739869,
   "start_xy": [
    660163.0102089507,
    4605615.97975883
   ],
   "end_xy": [
    660164.8295274577,
    4605613.598240276
   ]
  }
 },
 "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": 0.137,
   "obstruction_max_height_m": 18.57,
   "flagged_windows_m": [
    2,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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/ct/USGS_1M_18_x65y461_CT_Statewide_C16.tif",
   "data/cache/usa/ct/USGS_1M_18_x66y461_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-09-03T22:40:19+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/connecticut-2026-08-23.osm.pbf",
  "osm_snapshot": "2026-08-22T20:21:28Z",
  "run_id": "extent-trim-v2-260903",
  "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": [
   "x65y461",
   "x66y461"
  ],
  "route_cut_m": 599.0,
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/CT_Statewide_B3_2016",
   "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": "Watertown",
  "county": "Connecticut"
 }
}