{
 "ocl_version": "0.1.0",
 "name": "Richmond Street",
 "slug": "richmond-street",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.370592957629242,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 233.0,
   "end_distance_m": 235.0,
   "start_elevation_m": 269.3532146623529,
   "end_elevation_m": 269.7806265215055,
   "min_gradient_pct": -1.2947130449205702
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.302596253866568,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 232.0,
   "end_distance_m": 235.0,
   "start_elevation_m": 269.1415486338895,
   "end_elevation_m": 269.7806265215055,
   "min_gradient_pct": -1.2760884033620339
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.205412848563583,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 230.0,
   "end_distance_m": 235.0,
   "start_elevation_m": 268.7203558790773,
   "end_elevation_m": 269.7806265215055,
   "min_gradient_pct": -1.1627138341219734
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.038011659226754,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 230.0,
   "end_distance_m": 240.0,
   "start_elevation_m": 268.7203558790773,
   "end_elevation_m": 270.824157045,
   "min_gradient_pct": 2.44298521237738
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.41039991060984,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 226.0,
   "end_distance_m": 246.0,
   "start_elevation_m": 267.9298529341826,
   "end_elevation_m": 272.01193291630454,
   "min_gradient_pct": 3.9184633618778264
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.025589767431256,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 222.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 267.1865523753765,
   "end_elevation_m": 272.1929498172343,
   "min_gradient_pct": 4.120796289873965
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.525744959673034,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 210.0,
   "end_distance_m": 260.0,
   "start_elevation_m": 265.47450793615286,
   "end_elevation_m": 274.2373804159894,
   "min_gradient_pct": 4.787108374915022
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.465072930693964,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 158.0,
   "end_distance_m": 258.0,
   "start_elevation_m": 259.5275526060438,
   "end_elevation_m": 273.99262553673776,
   "min_gradient_pct": 6.546290500751752
  }
 ],
 "shape": {
  "ascent_concentration": 0.355,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 175.0,
  "shape_class": "sustained"
 },
 "length_m": 265.8655531705603,
 "start_elevation_m": 245.11624913569705,
 "end_elevation_m": 274.94241483520517,
 "endpoint_gain_m": 29.826165699508124,
 "overall_gradient_pct": 11.218514525036566,
 "accumulated_ascent_m": 29.884301391214223,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.205412848563583,
   "start_distance_m": 230.0,
   "end_distance_m": 235.0,
   "midpoint_distance_m": 232.5,
   "start_elevation_m": 268.7203558790773,
   "end_elevation_m": 269.7806265215055,
   "start_xy": [
    654866.9684522271,
    4720602.186317369
   ],
   "end_xy": [
    654871.9683457606,
    4720602.153688339
   ]
  },
  "max_10m": {
   "gradient_pct": 21.038011659226754,
   "start_distance_m": 230.0,
   "end_distance_m": 240.0,
   "midpoint_distance_m": 235.0,
   "start_elevation_m": 268.7203558790773,
   "end_elevation_m": 270.824157045,
   "start_xy": [
    654866.9684522271,
    4720602.186317369
   ],
   "end_xy": [
    654876.9682392941,
    4720602.121059309
   ]
  },
  "max_20m": {
   "gradient_pct": 20.41039991060984,
   "start_distance_m": 226.0,
   "end_distance_m": 246.0,
   "midpoint_distance_m": 236.0,
   "start_elevation_m": 267.9298529341826,
   "end_elevation_m": 272.01193291630454,
   "start_xy": [
    654862.9685374002,
    4720602.212420593
   ],
   "end_xy": [
    654882.9681115343,
    4720602.081904473
   ]
  },
  "max_25m": {
   "gradient_pct": 20.025589767431256,
   "start_distance_m": 222.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 234.5,
   "start_elevation_m": 267.1865523753765,
   "end_elevation_m": 272.1929498172343,
   "start_xy": [
    654858.9701060209,
    4720602.295470459
   ],
   "end_xy": [
    654883.968090241,
    4720602.075378667
   ]
  },
  "max_50m": {
   "gradient_pct": 17.525744959673034,
   "start_distance_m": 210.0,
   "end_distance_m": 260.0,
   "midpoint_distance_m": 235.0,
   "start_elevation_m": 265.47450793615286,
   "end_elevation_m": 274.2373804159894,
   "start_xy": [
    654846.982559201,
    4720602.842024428
   ],
   "end_xy": [
    654896.8150341139,
    4720602.751376954
   ]
  },
  "max_100m": {
   "gradient_pct": 14.465072930693964,
   "start_distance_m": 158.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 208.0,
   "start_elevation_m": 259.5275526060438,
   "end_elevation_m": 273.99262553673776,
   "start_xy": [
    654795.0347585329,
    4720605.168797173
   ],
   "end_xy": [
    654894.9678560147,
    4720602.0035948
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.1627138341219734,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 245.11624913569705,
   "end_elevation_m": 245.05811344399095,
   "start_xy": [
    654637.319,
    4720613.917
   ],
   "end_xy": [
    654642.3170303005,
    4720613.776667841
   ]
  },
  "min_10m": {
   "gradient_pct": 2.44298521237738,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 245.11624913569705,
   "end_elevation_m": 245.36054765693478,
   "start_xy": [
    654637.319,
    4720613.917
   ],
   "end_xy": [
    654647.3150606011,
    4720613.636335682
   ]
  },
  "min_20m": {
   "gradient_pct": 3.9184633618778264,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 245.11624913569705,
   "end_elevation_m": 245.8999418080726,
   "start_xy": [
    654637.319,
    4720613.917
   ],
   "end_xy": [
    654657.3111212022,
    4720613.355671364
   ]
  },
  "min_25m": {
   "gradient_pct": 4.120796289873965,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 245.11624913569705,
   "end_elevation_m": 246.14644820816554,
   "start_xy": [
    654637.319,
    4720613.917
   ],
   "end_xy": [
    654662.3091515027,
    4720613.215339204
   ]
  },
  "min_50m": {
   "gradient_pct": 4.787108374915022,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 245.11624913569705,
   "end_elevation_m": 247.50980332315456,
   "start_xy": [
    654637.319,
    4720613.917
   ],
   "end_xy": [
    654687.2394900138,
    4720611.490575091
   ]
  },
  "min_100m": {
   "gradient_pct": 6.546290500751752,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 245.11624913569705,
   "end_elevation_m": 251.6625396364488,
   "start_xy": [
    654637.319,
    4720613.917
   ],
   "end_xy": [
    654737.0950705552,
    4720607.753183221
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.370592957629242,
   "start_distance_m": 233.0,
   "end_distance_m": 235.0,
   "midpoint_distance_m": 234.0,
   "start_elevation_m": 269.3532146623529,
   "end_elevation_m": 269.7806265215055,
   "start_xy": [
    654869.9683883472,
    4720602.166739951
   ],
   "end_xy": [
    654871.9683457606,
    4720602.153688339
   ]
  },
  "max_3m": {
   "gradient_pct": 21.302596253866568,
   "start_distance_m": 232.0,
   "end_distance_m": 235.0,
   "midpoint_distance_m": 233.5,
   "start_elevation_m": 269.1415486338895,
   "end_elevation_m": 269.7806265215055,
   "start_xy": [
    654868.9684096405,
    4720602.173265757
   ],
   "end_xy": [
    654871.9683457606,
    4720602.153688339
   ]
  }
 },
 "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_x65y473_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-08-24T21:50:37+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/massachusetts-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-ma-1-260824",
  "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, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x65y473"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 12.8% over 200 m (Terrain 50), gain 30.4 m over 266 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": "Adams",
  "county": "Massachusetts"
 }
}