{
 "ocl_version": "0.1.0",
 "name": "Pleasant Avenue",
 "slug": "pleasant-avenue",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.066597625510155,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 336.0,
   "end_distance_m": 338.0,
   "start_elevation_m": 100.3170708995481,
   "end_elevation_m": 100.7984028520583,
   "min_gradient_pct": -0.4386701268494164
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.918337059269373,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 340.0,
   "end_distance_m": 343.0,
   "start_elevation_m": 101.25899544269518,
   "end_elevation_m": 101.97654555447326,
   "min_gradient_pct": 0.22070311440055926
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.728163608111004,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 339.0,
   "end_distance_m": 344.0,
   "start_elevation_m": 101.02981331366874,
   "end_elevation_m": 102.21622149407429,
   "min_gradient_pct": 0.3439393182188155
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.4773881824475,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 334.0,
   "end_distance_m": 344.0,
   "start_elevation_m": 99.86848267582954,
   "end_elevation_m": 102.21622149407429,
   "min_gradient_pct": 0.35400628713247784
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.84734993356031,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 328.0,
   "end_distance_m": 348.0,
   "start_elevation_m": 98.67886204220517,
   "end_elevation_m": 103.04833202891723,
   "min_gradient_pct": 0.7553045873009978
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.82047881454639,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 323.0,
   "end_distance_m": 348.0,
   "start_elevation_m": 97.84321232528063,
   "end_elevation_m": 103.04833202891723,
   "min_gradient_pct": 0.857173826818098
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.325969929232883,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 298.0,
   "end_distance_m": 348.0,
   "start_elevation_m": 94.38534706430079,
   "end_elevation_m": 103.04833202891723,
   "min_gradient_pct": 1.2145498164975095
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.38943226544724,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 248.0,
   "end_distance_m": 348.0,
   "start_elevation_m": 89.65889976346999,
   "end_elevation_m": 103.04833202891723,
   "min_gradient_pct": 2.0913691115952986
  }
 ],
 "shape": {
  "ascent_concentration": 0.623,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 80.0,
  "shape_class": "stepped"
 },
 "length_m": 348.40899860468585,
 "start_elevation_m": 82.23130524079838,
 "end_elevation_m": 103.11970456135779,
 "endpoint_gain_m": 20.888399320559415,
 "overall_gradient_pct": 5.995367342466361,
 "accumulated_ascent_m": 20.902692328861605,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.728163608111004,
   "start_distance_m": 339.0,
   "end_distance_m": 344.0,
   "midpoint_distance_m": 341.5,
   "start_elevation_m": 101.02981331366874,
   "end_elevation_m": 102.21622149407429,
   "start_xy": [
    662086.1649354385,
    4593385.957814182
   ],
   "end_xy": [
    662084.9018172586,
    4593381.119991071
   ]
  },
  "max_10m": {
   "gradient_pct": 23.4773881824475,
   "start_distance_m": 334.0,
   "end_distance_m": 344.0,
   "midpoint_distance_m": 339.0,
   "start_elevation_m": 99.86848267582954,
   "end_elevation_m": 102.21622149407429,
   "start_xy": [
    662087.4280536185,
    4593390.795637295
   ],
   "end_xy": [
    662084.9018172586,
    4593381.119991071
   ]
  },
  "max_20m": {
   "gradient_pct": 21.84734993356031,
   "start_distance_m": 328.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 338.0,
   "start_elevation_m": 98.67886204220517,
   "end_elevation_m": 103.04833202891723,
   "start_xy": [
    662088.9437954344,
    4593396.601025029
   ],
   "end_xy": [
    662083.8913227146,
    4593377.249732581
   ]
  },
  "max_25m": {
   "gradient_pct": 20.82047881454639,
   "start_distance_m": 323.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 335.5,
   "start_elevation_m": 97.84321232528063,
   "end_elevation_m": 103.04833202891723,
   "start_xy": [
    662090.2069136144,
    4593401.438848141
   ],
   "end_xy": [
    662083.8913227146,
    4593377.249732581
   ]
  },
  "max_50m": {
   "gradient_pct": 17.325969929232883,
   "start_distance_m": 298.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 323.0,
   "start_elevation_m": 94.38534706430079,
   "end_elevation_m": 103.04833202891723,
   "start_xy": [
    662096.5225045142,
    4593425.627963701
   ],
   "end_xy": [
    662083.8913227146,
    4593377.249732581
   ]
  },
  "max_100m": {
   "gradient_pct": 13.38943226544724,
   "start_distance_m": 248.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 298.0,
   "start_elevation_m": 89.65889976346999,
   "end_elevation_m": 103.04833202891723,
   "start_xy": [
    662109.1536863139,
    4593474.006194822
   ],
   "end_xy": [
    662083.8913227146,
    4593377.249732581
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.3439393182188155,
   "start_distance_m": 141.0,
   "end_distance_m": 146.0,
   "midpoint_distance_m": 143.5,
   "start_elevation_m": 86.7130907208733,
   "end_elevation_m": 86.73028768678424,
   "start_xy": [
    662135.5320623781,
    4593577.699075648
   ],
   "end_xy": [
    662134.3646532425,
    4593572.837269819
   ]
  },
  "min_10m": {
   "gradient_pct": 0.35400628713247784,
   "start_distance_m": 141.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 146.0,
   "start_elevation_m": 86.7130907208733,
   "end_elevation_m": 86.74849134958654,
   "start_xy": [
    662135.5320623781,
    4593577.699075648
   ],
   "end_xy": [
    662133.197244107,
    4593567.975463991
   ]
  },
  "min_20m": {
   "gradient_pct": 0.7553045873009978,
   "start_distance_m": 141.0,
   "end_distance_m": 161.0,
   "midpoint_distance_m": 151.0,
   "start_elevation_m": 86.7130907208733,
   "end_elevation_m": 86.8641516383335,
   "start_xy": [
    662135.5320623781,
    4593577.699075648
   ],
   "end_xy": [
    662130.862425836,
    4593558.2518523345
   ]
  },
  "min_25m": {
   "gradient_pct": 0.857173826818098,
   "start_distance_m": 141.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 153.5,
   "start_elevation_m": 86.7130907208733,
   "end_elevation_m": 86.92738417757782,
   "start_xy": [
    662135.5320623781,
    4593577.699075648
   ],
   "end_xy": [
    662129.6950167004,
    4593553.390046507
   ]
  },
  "min_50m": {
   "gradient_pct": 1.2145498164975095,
   "start_distance_m": 130.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 155.0,
   "start_elevation_m": 86.5541944372102,
   "end_elevation_m": 87.16146934545895,
   "start_xy": [
    662138.1003624763,
    4593588.395048469
   ],
   "end_xy": [
    662126.3320935615,
    4593539.800589145
   ]
  },
  "min_100m": {
   "gradient_pct": 2.0913691115952986,
   "start_distance_m": 106.0,
   "end_distance_m": 206.0,
   "midpoint_distance_m": 156.0,
   "start_elevation_m": 85.94908216331262,
   "end_elevation_m": 88.04045127490792,
   "start_xy": [
    662143.7039263268,
    4593611.731716444
   ],
   "end_xy": [
    662119.7638790257,
    4593514.643908963
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.066597625510155,
   "start_distance_m": 336.0,
   "end_distance_m": 338.0,
   "midpoint_distance_m": 337.0,
   "start_elevation_m": 100.3170708995481,
   "end_elevation_m": 100.7984028520583,
   "start_xy": [
    662086.9228063464,
    4593388.86050805
   ],
   "end_xy": [
    662086.4175590745,
    4593386.925378805
   ]
  },
  "max_3m": {
   "gradient_pct": 23.918337059269373,
   "start_distance_m": 340.0,
   "end_distance_m": 343.0,
   "midpoint_distance_m": 341.5,
   "start_elevation_m": 101.25899544269518,
   "end_elevation_m": 101.97654555447326,
   "start_xy": [
    662085.9123118025,
    4593384.99024956
   ],
   "end_xy": [
    662085.1544408945,
    4593382.0875556925
   ]
  }
 },
 "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": {
  "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_x66y460_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-08-24T21:47:46+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": "redo-ct-5-260824",
  "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, CT_Statewide_C16 (collected 2016)",
  "elevation_tile_ids": [
   "x66y460"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 8.3% over 200 m (Terrain 50), gain 21.2 m over 348 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_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Naugatuck",
  "county": "Connecticut"
 }
}