{
 "ocl_version": "0.1.0",
 "name": "Merritt Road",
 "slug": "merritt-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.13351965653533,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 405.0,
   "end_distance_m": 407.0,
   "start_elevation_m": 426.36707465013933,
   "end_elevation_m": 427.04974504327004,
   "min_gradient_pct": -17.651960014498513
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.71586871019281,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 405.0,
   "end_distance_m": 408.0,
   "start_elevation_m": 426.36707465013933,
   "end_elevation_m": 427.3485507114451,
   "min_gradient_pct": -16.09449623719191
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.89981867799429,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 404.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 426.1459755064592,
   "end_elevation_m": 427.6409664403589,
   "min_gradient_pct": -15.531261169238633
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.181560214676324,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 399.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 425.1228104188913,
   "end_elevation_m": 427.6409664403589,
   "min_gradient_pct": -14.978394891705307
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.0265918617647,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 390.0,
   "end_distance_m": 410.0,
   "start_elevation_m": 423.24823326612085,
   "end_elevation_m": 427.8535516384738,
   "min_gradient_pct": -9.946338152447254
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.576259057707375,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 386.0,
   "end_distance_m": 411.0,
   "start_elevation_m": 422.64571760781786,
   "end_elevation_m": 428.0397823722447,
   "min_gradient_pct": -8.87696784128093
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.186567514082753,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 362.0,
   "end_distance_m": 412.0,
   "start_elevation_m": 419.5919090686723,
   "end_elevation_m": 428.18519282571367,
   "min_gradient_pct": -7.759859604279882
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.839732792801215,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 312.0,
   "end_distance_m": 412.0,
   "start_elevation_m": 412.34546003291246,
   "end_elevation_m": 428.18519282571367,
   "min_gradient_pct": -7.158361389083211
  }
 ],
 "shape": {
  "ascent_concentration": 0.53,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 104.0,
  "shape_class": "stepped"
 },
 "length_m": 2369.8317821446117,
 "start_elevation_m": 408.076275099853,
 "end_elevation_m": 490.5329170954623,
 "endpoint_gain_m": 82.45664199560935,
 "overall_gradient_pct": 3.4794301695535994,
 "accumulated_ascent_m": 101.82250059093343,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.89981867799429,
   "start_distance_m": 404.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 406.5,
   "start_elevation_m": 426.1459755064592,
   "end_elevation_m": 427.6409664403589,
   "start_xy": [
    656524.21549364,
    4676686.600208432
   ],
   "end_xy": [
    656528.8574590968,
    4676688.458205586
   ]
  },
  "max_10m": {
   "gradient_pct": 25.181560214676324,
   "start_distance_m": 399.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 404.0,
   "start_elevation_m": 425.1228104188913,
   "end_elevation_m": 427.6409664403589,
   "start_xy": [
    656519.3597503625,
    4676685.682512797
   ],
   "end_xy": [
    656528.8574590968,
    4676688.458205586
   ]
  },
  "max_20m": {
   "gradient_pct": 23.0265918617647,
   "start_distance_m": 390.0,
   "end_distance_m": 410.0,
   "midpoint_distance_m": 400.0,
   "start_elevation_m": 423.24823326612085,
   "end_elevation_m": 427.8535516384738,
   "start_xy": [
    656510.3765113624,
    4676685.13349819
   ],
   "end_xy": [
    656529.7856634324,
    4676688.830276423
   ]
  },
  "max_25m": {
   "gradient_pct": 21.576259057707375,
   "start_distance_m": 386.0,
   "end_distance_m": 411.0,
   "midpoint_distance_m": 398.5,
   "start_elevation_m": 422.64571760781786,
   "end_elevation_m": 428.0397823722447,
   "start_xy": [
    656506.383958722,
    4676684.889524006
   ],
   "end_xy": [
    656530.7139985025,
    4676689.202020952
   ]
  },
  "max_50m": {
   "gradient_pct": 17.186567514082753,
   "start_distance_m": 362.0,
   "end_distance_m": 412.0,
   "midpoint_distance_m": 387.0,
   "start_elevation_m": 419.5919090686723,
   "end_elevation_m": 428.18519282571367,
   "start_xy": [
    656483.3287278096,
    4676691.338006103
   ],
   "end_xy": [
    656531.642208386,
    4676689.574077922
   ]
  },
  "max_100m": {
   "gradient_pct": 15.839732792801215,
   "start_distance_m": 312.0,
   "end_distance_m": 412.0,
   "midpoint_distance_m": 362.0,
   "start_elevation_m": 412.34546003291246,
   "end_elevation_m": 428.18519282571367,
   "start_xy": [
    656435.0087920685,
    4676703.280460351
   ],
   "end_xy": [
    656531.642208386,
    4676689.574077922
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.531261169238633,
   "start_distance_m": 167.0,
   "end_distance_m": 172.0,
   "midpoint_distance_m": 169.5,
   "start_elevation_m": 412.8308661899284,
   "end_elevation_m": 412.05430313146644,
   "start_xy": [
    656305.5918065627,
    4676640.451530378
   ],
   "end_xy": [
    656309.6207767569,
    4676643.412508487
   ]
  },
  "min_10m": {
   "gradient_pct": -14.978394891705307,
   "start_distance_m": 167.0,
   "end_distance_m": 177.0,
   "midpoint_distance_m": 172.0,
   "start_elevation_m": 412.8308661899284,
   "end_elevation_m": 411.33302670075784,
   "start_xy": [
    656305.5918065627,
    4676640.451530378
   ],
   "end_xy": [
    656313.6505752719,
    4676646.372360498
   ]
  },
  "min_20m": {
   "gradient_pct": -9.946338152447254,
   "start_distance_m": 167.0,
   "end_distance_m": 187.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 412.8308661899284,
   "end_elevation_m": 410.8415985594389,
   "start_xy": [
    656305.5918065627,
    4676640.451530378
   ],
   "end_xy": [
    656321.9970236019,
    4676651.8752256185
   ]
  },
  "min_25m": {
   "gradient_pct": -8.87696784128093,
   "start_distance_m": 167.0,
   "end_distance_m": 192.0,
   "midpoint_distance_m": 179.5,
   "start_elevation_m": 412.8308661899284,
   "end_elevation_m": 410.61162422960814,
   "start_xy": [
    656305.5918065627,
    4676640.451530378
   ],
   "end_xy": [
    656326.2040496413,
    4676654.577248342
   ]
  },
  "min_50m": {
   "gradient_pct": -7.759859604279882,
   "start_distance_m": 1458.0,
   "end_distance_m": 1508.0,
   "midpoint_distance_m": 1483.0,
   "start_elevation_m": 469.222443469987,
   "end_elevation_m": 465.3425136678471,
   "start_xy": [
    657417.0656048097,
    4676356.489226714
   ],
   "end_xy": [
    657466.1160215379,
    4676354.997961942
   ]
  },
  "min_100m": {
   "gradient_pct": -7.158361389083211,
   "start_distance_m": 1454.0,
   "end_distance_m": 1554.0,
   "midpoint_distance_m": 1504.0,
   "start_elevation_m": 469.4472796042443,
   "end_elevation_m": 462.28891821516106,
   "start_xy": [
    657413.2883197786,
    4676357.805326052
   ],
   "end_xy": [
    657511.5239591544,
    4676362.184028852
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.13351965653533,
   "start_distance_m": 405.0,
   "end_distance_m": 407.0,
   "midpoint_distance_m": 406.0,
   "start_elevation_m": 426.36707465013933,
   "end_elevation_m": 427.04974504327004,
   "start_xy": [
    656525.143837968,
    4676686.971929834
   ],
   "end_xy": [
    656527.0005785362,
    4676687.715242428
   ]
  },
  "max_3m": {
   "gradient_pct": 32.71586871019281,
   "start_distance_m": 405.0,
   "end_distance_m": 408.0,
   "midpoint_distance_m": 406.5,
   "start_elevation_m": 426.36707465013933,
   "end_elevation_m": 427.3485507114451,
   "start_xy": [
    656525.143837968,
    4676686.971929834
   ],
   "end_xy": [
    656527.9289228835,
    4676688.086963782
   ]
  }
 },
 "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": 0.399,
   "obstruction_max_height_m": 29.85,
   "flagged_windows_m": [
    2,
    3,
    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/ma/USGS_1M_18_x65y468_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-03T18:57:52+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/merritt-road/merritt-road.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": [
   "x65y468"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_MA_ME_MA_QL2_UTM18_L2_2015_LAS_2018",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.993,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Otis",
  "county": "Massachusetts"
 }
}