{
 "ocl_version": "0.1.0",
 "name": "Ansonia Road",
 "slug": "ansonia-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.5326933261087,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 113.0,
   "end_distance_m": 115.0,
   "start_elevation_m": 195.07120004111033,
   "end_elevation_m": 195.5218539076325,
   "min_gradient_pct": -1.213560052464402
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.06640948290423,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 112.0,
   "end_distance_m": 115.0,
   "start_elevation_m": 194.85986162314538,
   "end_elevation_m": 195.5218539076325,
   "min_gradient_pct": -1.1183667160319526
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.902485167482837,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 110.0,
   "end_distance_m": 115.0,
   "start_elevation_m": 194.42672964925836,
   "end_elevation_m": 195.5218539076325,
   "min_gradient_pct": -0.8734612006634279
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.64366942672075,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 109.0,
   "end_distance_m": 119.0,
   "start_elevation_m": 194.21367773469234,
   "end_elevation_m": 196.37804467736441,
   "min_gradient_pct": -0.8062718530527491
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.28213765164503,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 102.0,
   "end_distance_m": 122.0,
   "start_elevation_m": 192.7520159926728,
   "end_elevation_m": 197.0084435230018,
   "min_gradient_pct": -0.6425894557756351
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.194423882499564,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 102.0,
   "end_distance_m": 127.0,
   "start_elevation_m": 192.7520159926728,
   "end_elevation_m": 198.0506219632977,
   "min_gradient_pct": -0.4970466747882938
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.27095182855993,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 98.0,
   "end_distance_m": 148.0,
   "start_elevation_m": 191.9814620485347,
   "end_elevation_m": 202.11693796281466,
   "min_gradient_pct": -0.3895580829048413
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.252748928327236,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 72.0,
   "end_distance_m": 172.0,
   "start_elevation_m": 187.9710497151762,
   "end_elevation_m": 206.22379864350344,
   "min_gradient_pct": 0.8903917101237084
  }
 ],
 "shape": {
  "ascent_concentration": 0.408,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 131.0,
  "shape_class": "sustained"
 },
 "length_m": 801.5061616060038,
 "start_elevation_m": 180.73679172905065,
 "end_elevation_m": 253.16652331386604,
 "endpoint_gain_m": 72.42973158481539,
 "overall_gradient_pct": 9.036703029167684,
 "accumulated_ascent_m": 72.63599015394223,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.902485167482837,
   "start_distance_m": 110.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 112.5,
   "start_elevation_m": 194.42672964925836,
   "end_elevation_m": 195.5218539076325,
   "start_xy": [
    622537.1353691057,
    4591343.645945118
   ],
   "end_xy": [
    622542.1032238094,
    4591344.212001337
   ]
  },
  "max_10m": {
   "gradient_pct": 21.64366942672075,
   "start_distance_m": 109.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 114.0,
   "start_elevation_m": 194.21367773469234,
   "end_elevation_m": 196.37804467736441,
   "start_xy": [
    622536.141798165,
    4591343.532733874
   ],
   "end_xy": [
    622546.0775075724,
    4591344.664846312
   ]
  },
  "max_20m": {
   "gradient_pct": 21.28213765164503,
   "start_distance_m": 102.0,
   "end_distance_m": 122.0,
   "midpoint_distance_m": 112.0,
   "start_elevation_m": 192.7520159926728,
   "end_elevation_m": 197.0084435230018,
   "start_xy": [
    622529.1868015799,
    4591342.740255168
   ],
   "end_xy": [
    622549.0582203945,
    4591345.004480043
   ]
  },
  "max_25m": {
   "gradient_pct": 21.194423882499564,
   "start_distance_m": 102.0,
   "end_distance_m": 127.0,
   "midpoint_distance_m": 114.5,
   "start_elevation_m": 192.7520159926728,
   "end_elevation_m": 198.0506219632977,
   "start_xy": [
    622529.1868015799,
    4591342.740255168
   ],
   "end_xy": [
    622554.0260750982,
    4591345.570536263
   ]
  },
  "max_50m": {
   "gradient_pct": 20.27095182855993,
   "start_distance_m": 98.0,
   "end_distance_m": 148.0,
   "midpoint_distance_m": 123.0,
   "start_elevation_m": 191.9814620485347,
   "end_elevation_m": 202.11693796281466,
   "start_xy": [
    622525.2125178169,
    4591342.287410192
   ],
   "end_xy": [
    622574.8910648536,
    4591347.947972382
   ]
  },
  "max_100m": {
   "gradient_pct": 18.252748928327236,
   "start_distance_m": 72.0,
   "end_distance_m": 172.0,
   "midpoint_distance_m": 122.0,
   "start_elevation_m": 187.9710497151762,
   "end_elevation_m": 206.22379864350344,
   "start_xy": [
    622499.433694201,
    4591338.903839497
   ],
   "end_xy": [
    622598.7367674314,
    4591350.665042235
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.8734612006634279,
   "start_distance_m": 702.0,
   "end_distance_m": 707.0,
   "midpoint_distance_m": 704.5,
   "start_elevation_m": 250.74438583345966,
   "end_elevation_m": 250.7007127734265,
   "start_xy": [
    622912.5984239533,
    4591399.218020775
   ],
   "end_xy": [
    622912.0675569461,
    4591404.189758925
   ]
  },
  "min_10m": {
   "gradient_pct": -0.8062718530527491,
   "start_distance_m": 697.0,
   "end_distance_m": 707.0,
   "midpoint_distance_m": 702.0,
   "start_elevation_m": 250.78133995873176,
   "end_elevation_m": 250.7007127734265,
   "start_xy": [
    622913.1292909606,
    4591394.246282627
   ],
   "end_xy": [
    622912.0675569461,
    4591404.189758925
   ]
  },
  "min_20m": {
   "gradient_pct": -0.6425894557756351,
   "start_distance_m": 688.0,
   "end_distance_m": 708.0,
   "midpoint_distance_m": 698.0,
   "start_elevation_m": 250.82771559278947,
   "end_elevation_m": 250.69919770163435,
   "start_xy": [
    622914.0848515738,
    4591385.297153959
   ],
   "end_xy": [
    622911.9613835446,
    4591405.184106554
   ]
  },
  "min_25m": {
   "gradient_pct": -0.4970466747882938,
   "start_distance_m": 686.0,
   "end_distance_m": 711.0,
   "midpoint_distance_m": 698.5,
   "start_elevation_m": 250.8304657058403,
   "end_elevation_m": 250.70620403714324,
   "start_xy": [
    622914.2971983767,
    4591383.308458699
   ],
   "end_xy": [
    622911.6428633402,
    4591408.167149443
   ]
  },
  "min_50m": {
   "gradient_pct": -0.3895580829048413,
   "start_distance_m": 686.0,
   "end_distance_m": 736.0,
   "midpoint_distance_m": 711.0,
   "start_elevation_m": 250.8304657058403,
   "end_elevation_m": 250.6356866643879,
   "start_xy": [
    622914.2971983767,
    4591383.308458699
   ],
   "end_xy": [
    622908.9885283037,
    4591433.025840187
   ]
  },
  "min_100m": {
   "gradient_pct": 0.8903917101237084,
   "start_distance_m": 669.0,
   "end_distance_m": 769.0,
   "midpoint_distance_m": 719.0,
   "start_elevation_m": 250.46850302578264,
   "end_elevation_m": 251.35889473590635,
   "start_xy": [
    622915.9251278414,
    4591366.3872169955
   ],
   "end_xy": [
    622914.3218810053,
    4591462.992827742
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.5326933261087,
   "start_distance_m": 113.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 114.0,
   "start_elevation_m": 195.07120004111033,
   "end_elevation_m": 195.5218539076325,
   "start_xy": [
    622540.1160819279,
    4591343.98557885
   ],
   "end_xy": [
    622542.1032238094,
    4591344.212001337
   ]
  },
  "max_3m": {
   "gradient_pct": 22.06640948290423,
   "start_distance_m": 112.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 113.5,
   "start_elevation_m": 194.85986162314538,
   "end_elevation_m": 195.5218539076325,
   "start_xy": [
    622539.1225109872,
    4591343.872367606
   ],
   "end_xy": [
    622542.1032238094,
    4591344.212001337
   ]
  }
 },
 "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": 0.344,
   "obstruction_max_height_m": 22.7,
   "flagged_windows_m": [
    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_x62y460_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-09-04T21:48:20+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": "hunt-wave1-260905",
  "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": [
   "x62y460"
  ],
  "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_Sandy_2014_LAS_2015",
   "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": "New Fairfield",
  "county": "Connecticut"
 }
}