{
 "ocl_version": "0.1.0",
 "name": "Pleasant Drive",
 "slug": "pleasant-drive-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.23184296681933,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 437.0,
   "end_distance_m": 439.0,
   "start_elevation_m": 197.52927541521996,
   "end_elevation_m": 198.03391227455634,
   "min_gradient_pct": -5.647424128773082
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.347190457797335,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 436.0,
   "end_distance_m": 439.0,
   "start_elevation_m": 197.27349656082242,
   "end_elevation_m": 198.03391227455634,
   "min_gradient_pct": -4.642621381195037
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.990151015426818,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 435.0,
   "end_distance_m": 440.0,
   "start_elevation_m": 197.02987982985246,
   "end_elevation_m": 198.2793873806238,
   "min_gradient_pct": 0.32803499147860293
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.24364541588801,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 431.0,
   "end_distance_m": 441.0,
   "start_elevation_m": 196.08951984035235,
   "end_elevation_m": 198.51388438194115,
   "min_gradient_pct": 0.8753773127679665
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.7741026902477,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 426.0,
   "end_distance_m": 446.0,
   "start_elevation_m": 195.06329232121513,
   "end_elevation_m": 199.61811285926467,
   "min_gradient_pct": 2.118818198620147
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.762458423017165,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 422.0,
   "end_distance_m": 447.0,
   "start_elevation_m": 194.36610164437067,
   "end_elevation_m": 199.80671625012496,
   "min_gradient_pct": 2.929126343460098
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.358600352761414,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 399.0,
   "end_distance_m": 449.0,
   "start_elevation_m": 191.8754891129508,
   "end_elevation_m": 200.0547892893315,
   "min_gradient_pct": 3.895192119769945
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.89893580651224,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 85.0,
   "end_distance_m": 185.0,
   "start_elevation_m": 161.96731637685855,
   "end_elevation_m": 174.8662521833708,
   "min_gradient_pct": 5.291149496967478
  }
 ],
 "shape": {
  "ascent_concentration": 0.328,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 78.0,
  "shape_class": "sustained"
 },
 "length_m": 449.71076166737583,
 "start_elevation_m": 157.66688796234337,
 "end_elevation_m": 200.11708895018003,
 "endpoint_gain_m": 42.450200987836666,
 "overall_gradient_pct": 9.4394452181766,
 "accumulated_ascent_m": 42.58947962927252,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.990151015426818,
   "start_distance_m": 435.0,
   "end_distance_m": 440.0,
   "midpoint_distance_m": 437.5,
   "start_elevation_m": 197.02987982985246,
   "end_elevation_m": 198.2793873806238,
   "start_xy": [
    635815.8861168079,
    4614009.003177031
   ],
   "end_xy": [
    635812.9460525871,
    4614013.047434982
   ]
  },
  "max_10m": {
   "gradient_pct": 24.24364541588801,
   "start_distance_m": 431.0,
   "end_distance_m": 441.0,
   "midpoint_distance_m": 436.0,
   "start_elevation_m": 196.08951984035235,
   "end_elevation_m": 198.51388438194115,
   "start_xy": [
    635818.2381681845,
    4614005.767770669
   ],
   "end_xy": [
    635812.3580397429,
    4614013.856286572
   ]
  },
  "max_20m": {
   "gradient_pct": 22.7741026902477,
   "start_distance_m": 426.0,
   "end_distance_m": 446.0,
   "midpoint_distance_m": 436.0,
   "start_elevation_m": 195.06329232121513,
   "end_elevation_m": 199.61811285926467,
   "start_xy": [
    635821.1782324053,
    4614001.723512718
   ],
   "end_xy": [
    635809.4179755221,
    4614017.900544524
   ]
  },
  "max_25m": {
   "gradient_pct": 21.762458423017165,
   "start_distance_m": 422.0,
   "end_distance_m": 447.0,
   "midpoint_distance_m": 434.5,
   "start_elevation_m": 194.36610164437067,
   "end_elevation_m": 199.80671625012496,
   "start_xy": [
    635823.530283782,
    4613998.488106357
   ],
   "end_xy": [
    635808.8299626779,
    4614018.709396115
   ]
  },
  "max_50m": {
   "gradient_pct": 16.358600352761414,
   "start_distance_m": 399.0,
   "end_distance_m": 449.0,
   "midpoint_distance_m": 424.0,
   "start_elevation_m": 191.8754891129508,
   "end_elevation_m": 200.0547892893315,
   "start_xy": [
    635837.0545791978,
    4613979.884519781
   ],
   "end_xy": [
    635807.6539369896,
    4614020.327099294
   ]
  },
  "max_100m": {
   "gradient_pct": 12.89893580651224,
   "start_distance_m": 85.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 135.0,
   "start_elevation_m": 161.96731637685855,
   "end_elevation_m": 174.8662521833708,
   "start_xy": [
    635743.1134264697,
    4613790.446775976
   ],
   "end_xy": [
    635728.4110151264,
    4613857.434550791
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.32803499147860293,
   "start_distance_m": 3.0,
   "end_distance_m": 8.0,
   "midpoint_distance_m": 5.5,
   "start_elevation_m": 157.69000024530598,
   "end_elevation_m": 157.7064019948799,
   "start_xy": [
    635783.9771440036,
    4613719.358524685
   ],
   "end_xy": [
    635781.4640506764,
    4613723.681065828
   ]
  },
  "min_10m": {
   "gradient_pct": 0.8753773127679665,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 157.66688796234337,
   "end_elevation_m": 157.75442569362016,
   "start_xy": [
    635785.485,
    4613716.765
   ],
   "end_xy": [
    635780.4588133455,
    4613725.410082284
   ]
  },
  "min_20m": {
   "gradient_pct": 2.118818198620147,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 157.66688796234337,
   "end_elevation_m": 158.0906516020674,
   "start_xy": [
    635785.485,
    4613716.765
   ],
   "end_xy": [
    635775.4326266912,
    4613734.05516457
   ]
  },
  "min_25m": {
   "gradient_pct": 2.929126343460098,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 157.66688796234337,
   "end_elevation_m": 158.3991695482084,
   "start_xy": [
    635785.485,
    4613716.765
   ],
   "end_xy": [
    635772.9195333639,
    4613738.377705712
   ]
  },
  "min_50m": {
   "gradient_pct": 3.895192119769945,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 157.66688796234337,
   "end_elevation_m": 159.61448402222834,
   "start_xy": [
    635785.485,
    4613716.765
   ],
   "end_xy": [
    635760.3540667278,
    4613759.990411425
   ]
  },
  "min_100m": {
   "gradient_pct": 5.291149496967478,
   "start_distance_m": 184.0,
   "end_distance_m": 284.0,
   "midpoint_distance_m": 234.0,
   "start_elevation_m": 174.78807947805169,
   "end_elevation_m": 180.07922897501916,
   "start_xy": [
    635727.4123083752,
    4613857.485391966
   ],
   "end_xy": [
    635820.061866819,
    4613883.641854332
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.23184296681933,
   "start_distance_m": 437.0,
   "end_distance_m": 439.0,
   "midpoint_distance_m": 438.0,
   "start_elevation_m": 197.52927541521996,
   "end_elevation_m": 198.03391227455634,
   "start_xy": [
    635814.7100911195,
    4614010.620880212
   ],
   "end_xy": [
    635813.5340654312,
    4614012.238583392
   ]
  },
  "max_3m": {
   "gradient_pct": 25.347190457797335,
   "start_distance_m": 436.0,
   "end_distance_m": 439.0,
   "midpoint_distance_m": 437.5,
   "start_elevation_m": 197.27349656082242,
   "end_elevation_m": 198.03391227455634,
   "start_xy": [
    635815.2981039637,
    4614009.812028621
   ],
   "end_xy": [
    635813.5340654312,
    4614012.238583392
   ]
  }
 },
 "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_x63y462_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-08-24T21:37:19+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": "redo-ct-3-260824",
  "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": [
   "x63y462"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.5% over 200 m (Terrain 50), gain 26.9 m over 289 m way. EXTENDED by graph walk: +1 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. 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": "Washington",
  "county": "Connecticut"
 }
}