{
 "ocl_version": "0.1.0",
 "name": "North Common Street",
 "slug": "north-common-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.578814646453793,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 381.0,
   "end_distance_m": 383.0,
   "start_elevation_m": 303.3018821985614,
   "end_elevation_m": 303.75345849149045,
   "min_gradient_pct": -2.361998128046139
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.34081839319894,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 380.0,
   "end_distance_m": 383.0,
   "start_elevation_m": 303.0832339396945,
   "end_elevation_m": 303.75345849149045,
   "min_gradient_pct": -2.0564321169710333
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.416130697178005,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 381.0,
   "end_distance_m": 386.0,
   "start_elevation_m": 303.3018821985614,
   "end_elevation_m": 304.4226887334203,
   "min_gradient_pct": -1.6299830164996365
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.092520534340565,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 380.0,
   "end_distance_m": 390.0,
   "start_elevation_m": 303.0832339396945,
   "end_elevation_m": 305.29248599312854,
   "min_gradient_pct": -1.4455714281797327
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.766561746655384,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 372.0,
   "end_distance_m": 392.0,
   "start_elevation_m": 301.3747410904527,
   "end_elevation_m": 305.72805343978376,
   "min_gradient_pct": -0.9899442544340786
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.610053435807913,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 372.0,
   "end_distance_m": 397.0,
   "start_elevation_m": 301.3747410904527,
   "end_elevation_m": 306.77725444940467,
   "min_gradient_pct": -0.6447393191126594
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.494342473976417,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 358.0,
   "end_distance_m": 408.0,
   "start_elevation_m": 298.62977244466873,
   "end_elevation_m": 308.87694368165694,
   "min_gradient_pct": 0.7430300999009205
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.19207084707506,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 334.0,
   "end_distance_m": 434.0,
   "start_elevation_m": 294.82918979896306,
   "end_elevation_m": 313.0212606460381,
   "min_gradient_pct": 1.405052446591526
  }
 ],
 "shape": {
  "ascent_concentration": 0.591,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 122.0,
  "shape_class": "stepped"
 },
 "length_m": 439.5287054493303,
 "start_elevation_m": 280.8805927717592,
 "end_elevation_m": 313.6276774271914,
 "endpoint_gain_m": 32.74708465543216,
 "overall_gradient_pct": 7.45049964869867,
 "accumulated_ascent_m": 32.94857787043429,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.416130697178005,
   "start_distance_m": 381.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 383.5,
   "start_elevation_m": 303.3018821985614,
   "end_elevation_m": 304.4226887334203,
   "start_xy": [
    740923.0337949604,
    4684178.753687703
   ],
   "end_xy": [
    740928.0230927317,
    4684178.426729338
   ]
  },
  "max_10m": {
   "gradient_pct": 22.092520534340565,
   "start_distance_m": 380.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 385.0,
   "start_elevation_m": 303.0832339396945,
   "end_elevation_m": 305.29248599312854,
   "start_xy": [
    740922.0359785772,
    4684178.819736624
   ],
   "end_xy": [
    740932.0145010643,
    4684178.164706845
   ]
  },
  "max_20m": {
   "gradient_pct": 21.766561746655384,
   "start_distance_m": 372.0,
   "end_distance_m": 392.0,
   "midpoint_distance_m": 382.0,
   "start_elevation_m": 301.3747410904527,
   "end_elevation_m": 305.72805343978376,
   "start_xy": [
    740914.0567511128,
    4684179.395657234
   ],
   "end_xy": [
    740934.0102072096,
    4684178.033725983
   ]
  },
  "max_25m": {
   "gradient_pct": 21.610053435807913,
   "start_distance_m": 372.0,
   "end_distance_m": 397.0,
   "midpoint_distance_m": 384.5,
   "start_elevation_m": 301.3747410904527,
   "end_elevation_m": 306.77725444940467,
   "start_xy": [
    740914.0567511128,
    4684179.395657234
   ],
   "end_xy": [
    740938.9995007281,
    4684177.706702357
   ]
  },
  "max_50m": {
   "gradient_pct": 20.494342473976417,
   "start_distance_m": 358.0,
   "end_distance_m": 408.0,
   "midpoint_distance_m": 383.0,
   "start_elevation_m": 298.62977244466873,
   "end_elevation_m": 308.87694368165694,
   "start_xy": [
    740900.093884728,
    4684180.4146427
   ],
   "end_xy": [
    740949.9759129987,
    4684176.986740964
   ]
  },
  "max_100m": {
   "gradient_pct": 18.19207084707506,
   "start_distance_m": 334.0,
   "end_distance_m": 434.0,
   "midpoint_distance_m": 384.0,
   "start_elevation_m": 294.82918979896306,
   "end_elevation_m": 313.0212606460381,
   "start_xy": [
    740876.1472312101,
    4684181.828051751
   ],
   "end_xy": [
    740975.9201414784,
    4684175.284730265
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.6299830164996365,
   "start_distance_m": 4.0,
   "end_distance_m": 9.0,
   "midpoint_distance_m": 6.5,
   "start_elevation_m": 280.88853287308547,
   "end_elevation_m": 280.8070337222605,
   "start_xy": [
    740546.6737990405,
    4684181.391008046
   ],
   "end_xy": [
    740551.6697974411,
    4684181.1910081105
   ]
  },
  "min_10m": {
   "gradient_pct": -1.4455714281797327,
   "start_distance_m": 4.0,
   "end_distance_m": 14.0,
   "midpoint_distance_m": 9.0,
   "start_elevation_m": 280.88853287308547,
   "end_elevation_m": 280.7439757302675,
   "start_xy": [
    740546.6737990405,
    4684181.391008046
   ],
   "end_xy": [
    740556.6657958418,
    4684180.991008175
   ]
  },
  "min_20m": {
   "gradient_pct": -0.9899442544340786,
   "start_distance_m": 3.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 13.0,
   "start_elevation_m": 280.89815648416635,
   "end_elevation_m": 280.70016763327953,
   "start_xy": [
    740545.6745996797,
    4684181.431016013
   ],
   "end_xy": [
    740565.6585932822,
    4684180.631016268
   ]
  },
  "min_25m": {
   "gradient_pct": -0.6447393191126594,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 280.8805927717592,
   "end_elevation_m": 280.71940794198105,
   "start_xy": [
    740542.677,
    4684181.551
   ],
   "end_xy": [
    740567.6569920032,
    4684180.55100032
   ]
  },
  "min_50m": {
   "gradient_pct": 0.7430300999009205,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 280.8805927717592,
   "end_elevation_m": 281.25210782170967,
   "start_xy": [
    740542.677,
    4684181.551
   ],
   "end_xy": [
    740592.6370234835,
    4684179.5519990595
   ]
  },
  "min_100m": {
   "gradient_pct": 1.405052446591526,
   "start_distance_m": 96.0,
   "end_distance_m": 196.0,
   "midpoint_distance_m": 146.0,
   "start_elevation_m": 282.25775806489315,
   "end_elevation_m": 283.6628105114847,
   "start_xy": [
    740638.6002479264,
    4684177.7129900735
   ],
   "end_xy": [
    740738.5421111217,
    4684174.520998444
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.578814646453793,
   "start_distance_m": 381.0,
   "end_distance_m": 383.0,
   "midpoint_distance_m": 382.0,
   "start_elevation_m": 303.3018821985614,
   "end_elevation_m": 303.75345849149045,
   "start_xy": [
    740923.0337949604,
    4684178.753687703
   ],
   "end_xy": [
    740925.0295011058,
    4684178.622706842
   ]
  },
  "max_3m": {
   "gradient_pct": 22.34081839319894,
   "start_distance_m": 380.0,
   "end_distance_m": 383.0,
   "midpoint_distance_m": 381.5,
   "start_elevation_m": 303.0832339396945,
   "end_elevation_m": 303.75345849149045,
   "start_xy": [
    740922.0359785772,
    4684178.819736624
   ],
   "end_xy": [
    740925.0295011058,
    4684178.622706842
   ]
  }
 },
 "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/ma/USGS_1M_18_x74y469_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-03T19:25:18+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/north-common-street/north-common-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, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x74y469"
  ],
  "climb_origin": "discovered",
  "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": "North Brookfield",
  "county": "Massachusetts"
 }
}